ONLINE DAILY WEATHER SUMMARY

Friday, 26 March 1999



UNSETTLED WEATHER MOVES ACROSS THE SOUTHEAST -- Rains accompanied a weak storm system as it moved eastward across the Southeast along a front. By late Thursday the low pressure system was located along the Atlantic Seaboard near Savannah, GA. Rain stretched from Tidewater Virginia southwestward to the Florida Panhandle. Several tenths of an inch of badly needed rain fell across the northern Gulf Coast and into interior sections of the Southeast, where drought conditions have prevailed. Earlier, scattered thunderstorms produced large hail and high winds with some damage across Georgia and South Carolina.

The surface low is expected to move northeastward along the Eastern Seaboard, reaching to near Mrytle Beach, SF by dawn on Friday. The precipitation shield accompanying this system is expected to continue across the Carolinas and Virginia. Portions of the Appalachians could get some light snow overnight.

HIGH PRESSURE DOMINATES THE WEATHER IN THE MIDWEST -- A large ridge of high pressure was situated across southern Wisconsin on Thursday night. As a result of this high pressure cell, essentially cloud-free conditions were found across the country from the Atlantic Seaboard to the Rockies, with the one major exception being the clouds over the Carolinas. Seasonal temperatures were also found across much of this region. However, unseasonably warm conditions continued over the high Plains and northern Rockies. Southwesterly downslope winds helped boost temperatures. Record high temperatures were set on Thursday afternoon in Montana at Billings (74 degrees), Glasgow (70 degrees) and Miles City (76 degrees); in Wyoming at Casper (70 degrees), Sheridan (75 degrees) and Worland (74 degrees) and in Idaho at Pocatello, ID (72 degrees). Only slight eastward movement of the ridge is expected overnight.

MORE RAINY WEATHER FOR THE PACIFIC NORTHWEST -- Several weather systems moving across the Northwest were responsible for widely scattered precipitation across Washington State, Oregon, Idaho and northwest Montana on Thursday night. A cold front trailed southward across Montana and Idaho from a low pressure system in Saskatchewan A second cold front along coastal Washington and Oregon was associated with a storm located near British Columbia's Queen Charlotte Islands. These systems are expected to move eastward by Friday morning. Snow advisories were posted for the Cascades and the Olympics of Washington State. Valley rain and mountain snow should spread eastward into Montana, as the leading cold front bisects the state. A high wind watch was posted for portions of Montana and northern Wyoming for winds exceeding 60 mph as the second front passes late Friday.

Because of the winds associated with the second storm, gale warnings were in effect for the Washington State coast line from the west entrance of the Strait of Juan de Fuca to Cape Shoalwater. Farther south, offshore buoys indicated that storm generated ocean swells reaching the California coast continued to have heights reaching 14 feet. Hence, a heavy surf advisory remained in effect for the California coast from Point Conception north to Point Arena.

AND IT DOES RAIN IN SOUTHERN CALIFORNIA -- As much as an inch of rain fell across portions of Southern California on Thursday as a low pressure system moved onshore. Some flooding occurred in Los Angeles. By late evening, a complex surface low pressure system with one center was located over the lower Colorado Valley of western Arizona, and another low was remained along the Southern California coast near the Channel Islands. Snow fell on the Southern California mountains at elevations above 6000 feet, with two inches reported at Mount Wilson. The precipitation should spread eastward across Southern California into southern Arizona by Friday morning.

YESTERDAY'S TEMPERATURE EXTREMES IN THE LOWER 48 -- The lowest temperature on Thursday was 5 degrees at Ely, MN while the day's high was 89 degrees at McAllen, TX.

ALASKAN WEATHER -- A strong low pressure system with a central pressure of approximately 974 mb moved east across the Bering Sea toward Bristol Bay on Thursday afternoon. A front associated with this storm system stretched eastward across Kodiak Island into the Gulf of Alaska. This storm system was accompanied by high winds, clouds and precipitation High winds continued across the eastern Aleutians. Cold Bay had a peak gust of 45 mph. A wind advisory was posted for Cold Bay. Rain and snow were reported along the Aleutians. Snow fell on Kodiak Island, the Alaska Peninsula and the southwestern portion of the mainland. A weaker storm system moved across the Gulf of Alaska toward the British Columbia coast. Rain fell across the southern portion of the Panhandle, while a mixture of rain and snow fell along portions of the Gulf Coast, to include Prince William Sound.

A large high pressure cell constituting an arctic air mass was located over the Arctic Ocean. A strong pressure gradient between this dome of high pressure and lower pressure across the southern portions of the state continued to generate strong winds across the Arctic coast. Wind gusts to 48 mph at Wainwright produced blizzard conditions as the blowing snow reduced visibility. As a result, a blizzard warning continued for the western Arctic coast.

Tranquil weather conditions continued across the central and eastern interior regions of Alaska on Thursday. Record high temperatures were set on Thursday at Nome when the temperature reached 38 degrees and at McGrath where the high was 48 degrees, aided by sunny skies coupled by chinook winds from off the Alaska Range.

The state's lowest temperature on Thursday was 11 degrees below zero at Wainwright. The highest statewide temperature by midafternoon was 52 degrees at Eielson AFB.

HAWAIIAN WEATHER -- The dry trade weather pattern of this week was beginning to change. An east-west oriented shear line located just north of Kauai on Thursday evening was poised to drift southward and produce increased clouds and showers across the islands that would continue through Friday. A large ridge of high pressure located to the west of the Dateline was forecast to move eastward, arriving at a position to the north of the islands on the weekend. With an increased pressure gradient, a corresponding increase in the speed of the trade winds is expected.

Small craft advisories remained in effect for all state waters. Since the moored buoy continued to report an ocean swell with height of 10 feet, high surface advisories were extended for the north and west shores of the islands.


HISTORICAL WEATHER EVENTS - 26 March

From the files of the Aviation Weather Center, Kansas City, MO and Intellicast

27 March

28 March


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Prepared by Edward J. Hopkins, Ph.D., email hopkins@meteor.wisc.edu
© Copyright, 1999, The American Meteorological Society.