IDENTIFICATION: CDS header
	Length:0

USAF: Identification FIXED-WEATHER-STATION USAF MASTER STATION CATALOG identifier

	The identifier that represents a FIXED-WEATHER-STATION. 
	Length:6

NCDC: Identification FIXED-WEATHER-STATION NCDC WBAN identifier

	The identifier that represents a FIXED-WEATHER-STATION. 
	Length:5

DATE: Identification GEOPHYSICAL-POINT-OBSERVATION date

	The date of a GEOPHYSICAL-POINT-OBSERVATION. 
	Length:8

HRMN: Identification GEOPHYSICAL-POINT-OBSERVATION time

	The time of a GEOPHYSICAL-POINT-OBSERVATION based on Coordinated Universal 
	Time Code (UTC). 
	Length:4

I: Identification GEOPHYSICAL-POINT-OBSERVATION data source flag

	The flag of a GEOPHYSICAL-POINT-OBSERVATION showing the source or combination 
	of sources used in creating the observation. 
	Length:1
	Default Value:9
	Table of Values:

	1: USAF hourly observation, candidate for merge with NCDC Surface Hourly (not yet merged, failed element cross-checks)
2: NCDC hourly observation, candidate for merge with USAF Surface Hourly (not yet merged, failed element cross-checks)
3: USAF hourly/NCDC hourly merged observation
4: USAF Surface Hourly observation
5: NCDC hourly observation
6: ASOS/AWOS observation from NCDC*
7: ASOS/AWOS observation merged with USAF Surface Hourly observation*
8: MAPSO observation (NCDC)*
A: USAF hourly/NCDC hourly precipitation merged observation, candidate for merge with NCDC Surface Hourly (not yet merged, failed element cross-checks)
B: NCDC hourly/NCDC hourly precipitation merged observation, candidate for merge with USAF Surface Hourly (not yet merged, failed element cross-checks)
C: USAF hourly/NCDC hourly/NCDC hourly precipitation merged observation
D: USAF hourly/NCDC hourly precipitation merged observation
E: NCDC hourly/NCDC hourly precipitation merged observation
F: Form OMR/1001 - Weather Bureau city office (keyed data)*
G: SAO surface airways observation, pre-1949 (keyed data)*
H: SAO surface airways observation, 1965-1981 format/period (keyed data)*
I: Climate Reference Network observation*
J: Cooperative Network observation*
K: Radiation Network observation*
L: Data from Climate Data Modernization Program (CDMP) data source*
M: National Renewable Energy Laboratory (NREL)*
N: NCAR / NCDC cooperative effort (various national datasets)*


TYPE: Identification GEOPHYSICAL-REPORT-TYPE code

	The code that denotes the type of geophysical surface observation. 
	Length:5
	Default Value:99999
	Table of Values:

	AERO: Aerological report
	AUST: Dataset from Australia*
	AUTO: Report from an automatic station
	BOGUS: Bogus report
	BRAZ: Dataset from Brazil*
	COOPD: US Cooperative Network summary of day report*
	COOPS: US Cooperative Network soil temperature report*
	CRB: Climate Reference Book data from CDMP*
	CRN05: Climate Reference Network report, with 5-minute reporting interval*
	CRN15: Climate Reference Network report, with 15-minute reporting interval*
	FM-12: SYNOP Report of surface observation form a fixed land station
	FM-13: SHIP Report of surface observation from a sea station
	FM-14: SYNOP MOBIL Report of surface observation from a mobile land station
	FM-15: METAR Aviation routine weather report
	FM-16: SPECI Aviation selected special weather report
	FM-18: BUOY Report of a buoy observation
	GREEN: Dataset from Greenland*
	MESOS: MESONET operated civilian or government agency
	MEXIC: Dataset from Mexico*
	NSRDB: National Solar Radiation Data Base
	PCP15: US 15-minute precipitation network report*
	PCP60: US 60-minute precipitation network report*
	S-S-A: Synoptic, airways, and auto merged report
	SA-AU: Airways and auto merged report
	SAO: Airways report (includes record specials)
	SAOSP: Airways special report (excluding record specials)
	SHEF: Standard Hydrologic Exchange Format
	SMARS: Supplementary airways station report
	SOD: Summary of day report from U.S. ASOS or AWOS station*
	SOM: Summary of month report from U.S. ASOS or AWOS station*
	SURF: Surface Radiation Network report*
	SY-AE: Synoptic and aero merged report
	SY-AU: Synoptic and auto merged report
	SY-MT: Synoptic and METAR merged report
	SY-SA: Synoptic and airways merged report
	WBO: Weather Bureau Office*
	WNO: Washington Naval Observatory
	

CEILING: SKY-CONDITION-OBSERVATION header
	Length:0

HGT: SKY-CONDITION-OBSERVATION ceiling height dimension

	The height above ground level (AGL) of the lowest cloud or obscuring phenomena 
	layer aloft with 5/8 or more summation total sky cover, which may be predominantly 
	opaque, or the vertical visibility into a surface-based obstruction. 
	Length:5
	Scale:1
	Unit:Meters
	Default Value:99999
	Table of Values:

	22000: Unlimited
	

Q: SKY-CONDITION-OBSERVATION ceiling quality code

	The code that denotes a quality status of a reported ceiling height dimension. 
	
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-CONDITION-OBSERVATION ceiling determination code

	The code that denotes the method used to determine the ceiling. 
	Length:1
	Default Value:9
	Table of Values:

	A: Aircraft
	B: Balloon
	C: Statistically derived
	D: Persistent cirriform ceiling (pre-1950 data)
	E: Estimated
	M: Measured
	P: Precipitation ceiling (pre-1950 data)
	R: Radar
	S: ASOS augmented
	U: Unknown ceiling (pre-1950 data)
	V: Variable ceiling (pre-1950 data)
	W: Obscured
	

I: SKY-CONDITION-OBSERVATION CAVOK code

	The code that represents whether the 'Ceiling And Visibility Okay' (CAVOK) 
	condition has been reported. 
	Length:1
	Default Value:9
	Table of Values:

	N: No
	Y: Yes
	

CLOUD LAYER: SKY-COVER-LAYER header
	Length:3

CV: SKY-COVER-LAYER coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD LAYER: SKY-COVER-LAYER header #2
	Length:3

CV: SKY-COVER-LAYER #2 coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER #2 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER #2 base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER #2 base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER #2 cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER #2 cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD LAYER: SKY-COVER-LAYER header #3
	Length:3

CV: SKY-COVER-LAYER #3 coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER #3 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER #3 base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER #3 base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER #3 cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER #3 cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD LAYER: SKY-COVER-LAYER header #4
	Length:3

CV: SKY-COVER-LAYER #4 coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER #4 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER #4 base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER #4 base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER #4 cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER #4 cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD LAYER: SKY-COVER-LAYER header #5
	Length:3

CV: SKY-COVER-LAYER #5 coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER #5 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER #5 base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER #5 base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER #5 cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER #5 cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD LAYER: SKY-COVER-LAYER header #6
	Length:3

CV: SKY-COVER-LAYER #6 coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by a SKY-COVER-LAYER.               Note:  This is for a discrete cloud 
	layer, as opposed to the cloud later summation data in the GD1-GD6 section. 
	
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	

Q: SKY-COVER-LAYER #6 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check, from NCDC SURFACE HOURLY
	5: Passed all quality control checks, from NCDC SURFACE HOURLY
	6: Suspect, from NCDC SURFACE HOURLY
	7: Erroneous, from NCDC SURFACE HOURLY
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

BASEH: SKY-COVER-LAYER #6 base height dimension

	The height relative to a VERTICAL-REFERENCE-DATUM of the lowest surface 
	of a cloud. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

Q: SKY-COVER-LAYER #6 base height quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

TP: SKY-COVER-LAYER #6 cloud type code

	The code that denotes the classification of the clouds that comprise a 
	SKY-COVER-LAYER. 
	Length:2
	Default Value:99
	Table of Values:

	00: Cirrus (Ci)
	01: Cirrocumulus (Cc)
	02: Cirrostratus (Cs)
	03: Altocumulus (Ac)
	04: Altostratus (As)
	05: Nimbostratus (Ns)
	06: Stratocumulus (Sc)
	07: Stratus (St)
	08: Cumulus (Cu)
	09: Cumulonimbus (Cb)
	10: Cloud not visible owing to darkness, fog, duststorm, sandstorm, or other analogous phenomena / sky obscured
	11: Not used
	12: Towering Cumulus (Tcu)
	13: Stratus fractus (Stfra)
	14: Stratocumulus Lenticular (Scsl)
	15: Cumulus Fractus (Cufra)
	16: Cumulonimbus Mammatus (Cbmam)
	17: Altocumulus Lenticular (Acsl)
	18: Altocumulus Castellanus (Accas)
	19: Altocumulus Mammatus (Acmam)
	20: Cirrocumulus Lenticular (Ccsl)
	21: Cirrus and/or Cirrocumulus
	22: Stratus and/or Fracto-stratus
	23: Cumulus and/or Fracto-cumulus
	

Q: SKY-COVER-LAYER #6 cloud type quality code

	The code that denotes a quality status of the reported SKY-COVER-LAYER 
	cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , from NCDC Surface Hourly
	5: Passed all quality control checks, from NCDC Surface Hourly
	6: Suspect, from NCDC Surface Hourly
	7: Erroneous, from NCDC Surface Hourly
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header
	Length:3

C: SKY-COVER-SUMMATION-STATE coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header #2
	Length:3

C: SKY-COVER-SUMMATION-STATE #2 coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE #2 Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE #2 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE #2 height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE #2 height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE #2 characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header #3
	Length:3

C: SKY-COVER-SUMMATION-STATE #3 coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE #3 Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE #3 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE #3 height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE #3 height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE #3 characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header #4
	Length:3

C: SKY-COVER-SUMMATION-STATE #4 coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE #4 Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE #4 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE #4 height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE #4 height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE #4 characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header #5
	Length:3

C: SKY-COVER-SUMMATION-STATE #5 coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE #5 Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE #5 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE #5 height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE #5 height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE #5 characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

CLOUD SUMM: SKY-COVER-SUMMATION-STATE header #6
	Length:3

C: SKY-COVER-SUMMATION-STATE #6 coverage code

	The code that denotes the portion of the total celestial dome covered by 
	all layers of clouds and other obscuring phenomena at or below a given 
	height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Clear - No coverage
	1: FEW - 2/8 or less coverage (not including zero)
	2: SCATTERED - 3/8-4/8 coverage
	3: BROKEN - 5/8-7/8 coverage
	4: OVERCAST - 8/8 coverage
	5: OBSCURED
	6: PARTIALLY OBSCURED
	

CV: SKY-COVER-SUMMATION-STATE #6 Coverage code #2

	The code that denotes the fraction of the total celestial dome covered 
	by a by all layers of clouds and other obscuring phenomena at or below 
	a given height, if reported by the station in octas. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark scattered
	14: Thin Broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

Q: SKY-COVER-SUMMATION-STATE #6 coverage quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	coverage. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HEIGHT: SKY-COVER-SUMMATION-STATE #6 height dimension

	The height above ground level (AGL) of the base of the cloud layer or obscuring 
	phenomena. 
	Length:6
	Unit:Meters
	Default Value:999999

Q: SKY-COVER-SUMMATION-STATE #6 height dimension quality code

	The code that denotes a quality status of the reported SKY-COVER-SUMMATION-STATE 
	height dimension. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

I: SKY-COVER-SUMMATION-STATE #6 characteristic code

	The code that represents a characteristic of a specific cloud or other 
	obscuring phenomena layer. 
	Length:1
	Default Value:9
	Table of Values:

	1: Variable height
	2: Variable amount
	3: Thin clouds
	4: Dark layer (reported in data prior to 1950)
	

SKY CONDITION: SKY-CONDITION-OBSERVATION #2 header
	Length:3

CV: SKY-CONDITION-OBSERVATION #2 total coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by clouds or other obscuring phenomena. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin scattered
	12: Scattered
	13: Dark scattered
	14: Thin broken
	15: Broken
	16: Dark broken
	17: Thin overcast
	18: Overcast
	19: Dark overcast
	

OP: SKY-CONDITION-OBSERVATION #2 total opaque coverage code

	The code that denotes the fraction of the total celestial dome covered 
	by opaque clouds or other obscuring phenomena.  Only reported by selected 
	U.S. stations during selected periods. 
	Length:2
	Default Value:99
	Table of Values:

	00: None, SKC or CLR
	01: One okta - 1/10 or less but not zero
	02: Two oktas - 2/10 - 3/10, or FEW
	03: Three oktas - 4/10
	04: Four oktas - 5/10, or SCT
	05: Five oktas - 6/10
	06: Six oktas - 7/10 - 8/10
	07: Seven oktas - 9/10 or more but not 10/10, or BKN
	08: Eight oktas - 10/10, or OVC
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	12: Scattered
	13: Dark scattered
	15: Broken
	16: Dark broken
	18: Overcast
	19: Dark overcast
	

Q: SKY-CONDITION-OBSERVATION #2 quality total coverage code

	The code that denotes a quality status of a reported total sky coverage 
	code. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

CL: SKY-CONDITION-OBSERVATION #2 total lowest cloud cover code

	The code that represents the fraction of the celestial dome covered by 
	all low clouds present.  If no low clouds are present; the code denotes 
	the fraction covered by all middle level clouds present. 
	Length:2
	Default Value:99
	Table of Values:

	00: None
	01: One okta or 1/10 or less but not zero
	02: Two oktas or 2/10 - 3/10
	03: Three oktas or 4/10
	04: Four oktas or 5/10
	05: Five oktas or 6/10
	06: Six oktas or 7/10 - 8/10
	07: Seven oktas or 9/10 or more but not 10/10
	08: Eight oktas or 10/10
	09: Sky obscured, or cloud amount cannot be estimated
	10: Partial obscuration
	11: Thin Scattered
	12: Scattered
	13: Dark Scattered
	14: Thin Broken
	15: Broken
	16: Dark Broken
	17: Thin Overcast
	18: Overcast
	19: Dark Overcast
	

Q: SKY-CONDITION-OBSERVATION #2 quality total lowest cloud cover code

	The code that denotes a quality status of a reported total lowest cloud 
	cover code. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

LO: SKY-CONDITION-OBSERVATION #2 low cloud genus code

	The code that denotes a type of low cloud. 
	Length:2
	Default Value:99
	Table of Values:

	00: No low clouds
	01: Cumulus humulis or Cumulus fractus other than of bad weather or both
	02: Cumulus mediocris or congestus, with or without Cumulus of species fractus or humulis or Stratocumulus all having bases at the same level
	03: Cumulonimbus calvus, with or without Cumulus, Stratocumulus or Stratus
	04: Stratocumulus cumulogenitus
	05: Stratocumulus other than Stratocumulus cumulogenitus
	06: Stratus nebulosus or Stratus fractus other than of bad weather, or both
	07: Stratus fractus or Cumulus fractus of bad weather, or both (pannus) usually below Altostratus or Nimbostratus
	08: Cumulus and Stratocumulus other than Stratocumulus cumulogenitus, with bases at different levels
	09: Cumulonimbus capillatus (often with an anvil), with or without Cumulonimbus calvus, Cumulus, Stratocumulus, Stratus or pannus
	

Q: SKY-CONDITION-OBSERVATION #2 quality low cloud genus code

	The code that denotes a quality status of a reported low cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HGT: SKY-CONDITION-OBSERVATION #2 lowest cloud base height dimension

	The height, above ground level (AGL), of the base of the lowest cloud. 
	
	Length:5
	Scale:1
	Unit:Meters
	Default Value:99999

Q: SKY-CONDITION-OBSERVATION #2 lowest cloud base height quality code

	The code that denotes a quality status of a lowest cloud base height. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

MI: SKY-CONDITION-OBSERVATION #2 mid cloud genus code

	The code that denotes a type of middle level cloud. 
	Length:2
	Default Value:99
	Table of Values:

	00: No middle clouds
	01: Altostratus translucidus
	02: Altostratus opacus or Nimbostratus
	03: Altocumulus translucidus at a single level
	04: Patches (often lenticular) of Altocumulus translucidus, continually changing and occurring at one or more levels
	05: Altocumulus translucidus in bands, or one or more layers of Altocumulus translucidus or opacus, progressively invading the sky;  these Altocumulus clouds generally thicken as a whole
	06: Altocumulus cumulogentis (or cumulonimbogentus)
	07: Altocumulus translucidus or opacus in two or more layers, or Altocumulus opacus in a single layer, not progressively invading the sky, or Altocumulus with Altostratus or Nimbostratus
	08: Altocumulus castellanus or floccus
	09: Altocumulus of a chaotic sky; generally at several levels
	

Q: SKY-CONDITION-OBSERVATION #2 quality mid cloud genus code

	The code that denotes a quality status of a reported mid cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

HI: SKY-CONDITION-OBSERVATION #2 high cloud genus code

	The code that denotes a type of high cloud. 
	Length:2
	Default Value:99
	Table of Values:

	00: No High Clouds
	01: Cirrus fibratus, sometimes uncinus, not progressively invading the sky
	02: Cirrus spissatus, in patches or entangled sheaves, which usually do not increase and sometimes seem to be the remains of the upper part of a Cumulonimbus; or Cirrus castellanus or floccus
	03: Cirrus spissatus cumulonimbogenitus
	04: Cirrus unicinus or fibratus, or both, progressively invading the sky; they generally thicken as a whole
	05: Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole, but the continuous veil does not reach 45 degrees above the horizon
	06: Cirrus (often in bands) and Cirrostratus, or Cirrostratus alone, progressively invading the sky; they generally thicken as a whole; the continuous veil extends more than 45 degrees above the horizon, without the sky being totally covered.
	07: Cirrostratus covering the whole sky
	08: Cirrostratus not progressively invading the sky and not entirely covering it
	09: Cirrocumulus alone, or Cirrocumulus predominant among the High clouds
	

Q: SKY-CONDITION-OBSERVATION #2 quality high cloud genus code

	The code that denotes a quality status of a reported high cloud type. 
	Length:1
	Default Value:9
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	

SUN: SUNSHINE-OBSERVATION header
	Length:3

DUR: SUNSHINE-OBSERVATION sunshine duration quantity

	The quantity of time sunshine occurred over the reporting period. 
	Length:4
	Unit:Minutes
	Default Value:9999

Q: SUNSHINE-OBSERVATION sunshine duration quality code

	The code that denotes a quality status of the reported SUNSHINE-OBSERVATION 
	sunshine duration. 
	Length:1
	Table of Values:

	0: Passed gross limits check
	1: Passed all quality control checks
	2: Suspect
	3: Erroneous
	4: Passed gross limits check , data originate from an NCDC data source
	5: Passed all quality control checks, data originate from an NCDC data source
	6: Suspect, data originate from an NCDC data source
	7: Erroneous, data originate from an NCDC data source
	9: Passed gross limits check if element is present
	M: Manual change made to value based on information provided by NWS or FAA
	

QCP: Identification METEOROLOGICAL-POINT-OBSERVATION quality control process name

	The name of the quality control process applied to a weather observation. 
	
	Length:4

SKYCON: SKY-CONDITION-OBSERVATION identifier header
	Length:3

CONVCLD: SKY-CONDITION-OBSERVATION identifier SKY CONDITION OBSERVATION convective cloud attribute

	The code that denotes the convective cloud type in an observation. 
	Length:7
	Default Value:9
	Table of Values:

	0: The code that denotes the convective cloud type in an observation.
	1: ACSL (Altocumulus Standing Lenticular)
	2: ACCAS (Altocumulus Castelanus)
	3: TCU (Towering Cumulus)
	4: MDT CU (Moderate Cumulus)
	5: CB/CB MAM DISTANT (Cumulonimbus or Cumulonimbus Mammatus in the distance)
	6: CB/CBMAM (Cumulonimbus or Cumulonimbus Mammatus within 20 nautical miles)
	7: Unknown
	

VERTDAT: SKY-CONDITION-OBSERVATION identifier SKY CONDITION OBSERVATION vertical datum attribute

	new field description 
	Length:7
	Default Value:999999
	Table of Values:

	AGL: Above Ground Level
	ALAT: Approximate lowest astronomical tide
	AP: Apparent
	CFB: Crest of first berm
	CRD: Columbia River datum
	ESLW: Equatorial Spring low water
	GCLWD: Gulf Coast low water datum
	HAT: Highest astronomical tide
	HHW: Higher high water
	HTWW: High tide wave wash
	HW: High water
	HWFC: High water full and change
	IND: Indefinite
	ISLW: Indian Spring low water
	LAT: Lowest astronomical tide
	LLW: Lowest low water
	LNLW: Lowest normal low water
	LRLW: Lower low water
	LSD: Land survey datum
	LW: Low water
	LWD: Low water datum
	LWFC: Low water full and charge
	MHHW: Mean higher high water
	MHLW: Mean higher low water
	MHW: Mean high water
	MHWN: Mean high water neap
	MHWS: Mean high water spring
	MLHW: Mean lower high water
	MLLW: Mean lower low water
	MLLWS: Mean lower low water springs
	MLW: Mean low water
	MLWN: Mean low water neap
	MLWS: Mean low water spring
	MSL: Mean sea level
	MTL: Mean tide level
	NC: No correction
	NT: Neap tide
	ST: Spring tide
	SWA: Storm wave action
	TLLW: Tropic lower low water
	UD: Undetermined
	UK: Unknown
	WGS84: WGS84 Ellispoid
	WGS84G: WGS84 GEOID
	

HGT: SKY-CONDITION-OBSERVATION identifier SKY CONDITION OBSERVATION base height upper range attribute

	The height relative to a VERTICAL-REFERENCE-DATUM for cloud bases reported 
	in a range or the highest height for a                     variable cloud 
	height report. The concept of a range is to accommodate the WMO practice 
	of reporting a cloud layer by a range of heights. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999

HGT: SKY-CONDITION-OBSERVATION identifier SKY CONDITION OBSERVATION base height lower range attribute

	The height relative to a VERTICAL-REFERENCE-DATUM for cloud bases reported 
	in a range or lowest height for a                            variable cloud 
	height report. The concept of a range is to accommodate the WMO practice 
	of reporting a cloud layer by a range of heights. 
	Length:6
	Scale:1
	Unit:Meters
	Default Value:+99999