NWS-Green Bay Forecast Discussion

						FXUS63 KGRB 152017
AFDGRB

Area Forecast Discussion
National Weather Service Green Bay WI
317 PM CDT Sun Mar 15 2026

Forecast discussion for routine afternoon forecast issuance

.KEY MESSAGES...

- The starting time of the Blizzard Warning for the Fox Valley
  east to Kewaunee and Manitowoc County was moved up.

- A historic winter storm continues to bring significant
  disruptions to travel by car and air which is expected to
  continue through the Monday morning commute.

- Heavy snow, mixed precip, and strong winds will create blizzard
  conditions as well as widespread and significant impacts across
  the area, including extremely difficult to impossible travel and
  power outages. Blizzard Warnings are in effect until 4 pm
  Monday.

- Clipper system could bring a light accumulating snowfall Tuesday
  night and Wednesday.

- Below zero wind chills will be possible on Monday, with
  temperatures moderating back to near normal throughout the
  week.

&&

.DISCUSSION...
Issued at 316 PM CDT Sun Mar 15 2026

The historic storm continues this afternoon with significant
impacts to travel by car and air. Reports around 2 feet have been
noted towards Wausau and around a foot in Green Bay. Latest
regional radar indicated a swath of heavier precipitation from
northern Illinois into northeast WI. There was a lull in the
heavier snow across central into north-central WI. This lull in
the snow will be short-lived as another round of snow will move
into this area during the evening and then continue overnight into
Monday morning. Additional accumulations from noon today through
Monday morning will run 7 to 12 inches across central and east-
central WI to 12 to 16 inches over far northeast WI. The snow was
a wetter snow across east-central WI with a more fluffy snow over
central and north-central WI.

There was some improvement in visibilities out towards Wausau
as of 3 pm. With winds expected to increase and another round of
snow, visibilities should deteriorate again this evening. The
better probability of reaching 1/4 mile in blizzard conditions
will be tonight into Monday morning. The snow should begin to
taper off Monday morning with gradually improving visibilities
late Monday morning and afternoon. Depending on the extent
of the blowing snow, the Blizzard Warning may be downgraded
early. Winds will gradually subside Monday afternoon and Monday
night. Light snow will linger (20-40% chance) into Monday night
across the far north. Overall, the storm will likely go down
in the record books with 1 to 2 feet of snow across northern WI
with isolated amounts of 30 inches.

Otherwise, the next chance of light snow will be Tuesday night
into Wednesday. Amounts will be minimal, probably around an inch
or less. After a chilly start to the week on Monday with highs
in the teens to lower 20s, temperatures should return closer to
normal by Thursday. With all the snow on the ground and the warmer
temperatures, concerns for some river flooding will increase as
the week progresses.

&&

.AVIATION...for 18Z TAF Issuance
Issued at 1234 PM CDT Sun Mar 15 2026

Historic winter storm this afternoon will disrupt travel as
many airports are at or below minimum criteria. Heavy snow and
blowing snow will continue tonight, with light snow and blowing
snow continuing into Monday. Blizzard conditions continuing into
Monday. Conditions gradually improving in the afternoon.

&&

.GRB WATCHES/WARNINGS/ADVISORIES...
Blizzard Warning until 4 PM CDT Monday for WIZ005-010>013-
018>022-030-031-035>040-045-048>050-073-074.
&&

$$

DISCUSSION.....Eckberg
AVIATION.......Eckberg