750
FXUS01 KWBC 270758
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
258 AM EST TUE FEB 27 2024
VALID 12Z TUE FEB 27 2024 - 12Z THU FEB 29 2024
...HEAVY SNOW RETURNS OVER PARTS OF THE CASCADES, THE NORTHERN
INTERMOUNTAIN REGION, AND NORTHERN ROCKIES ON WEDNESDAY...
...HEAVY SNOW OVER PARTS OF THE UPPER MISSISSIPPI VALLEY AND
MODERATE TO HEAVY SNOW OVER THE CASCADES TO CENTRAL ROCKIES ON
TUESDAY...
...LIGHT TO MODERATE SNOW OVER THE GREAT LAKES, CENTRAL
APPALACHIANS, AND NORTHEAST ON WEDNESDAY...
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE OHIO VALLEY/GREAT LAKES ON TUESDAY...
A STRONG WINTER STORM AND COLD FRONT WILL CONTINUE TO PROGRESS
THROUGH THE WEST, REACHING THE CENTRAL ROCKIES ON TUESDAY.
FURTHERMORE, THE STORM WILL CREATE NEAR-BLIZZARD CONDITIONS,
RESULTING IN DANGEROUS TRAVEL. SNOWFALL RATES OF 1-2 INCHES PER
HOUR WILL MOVE INTO THE GREAT BASIN AND CENTRAL ROCKIES ON
TUESDAY. THESE SNOW RATES COMBINED WITH WINDS GUSTING 50-65 MPH
WILL PRODUCE NEAR-BLIZZARD CONDITIONS WITH SIGNIFICANTLY REDUCED
VISIBILITY AND SNOW-COVERED ROADS LEADING TO DANGEROUS TRAVEL.
FURTHER, SIGNIFICANT SNOW ACCUMULATIONS WILL OCCUR ACROSS THE
COLORADO ROCKIES SOUTHWARD INTO THE SAN JUANS AND SANGRE DE
CRISTOS; THERE IS A HIGH CHANCE (GREATER THAN 70%) OF MORE THAN 8
INCHES OF SNOW IN THE HIGHER ELEVATIONS.
IN ADDITION, WIDESPREAD SNOW SQUALLS ARE EXPECTED TO DEVELOP ALONG
THE PATH OF THE COLD FRONT FROM UTAH TO WYOMING AND COLORADO ON
TUESDAY. WHERE SNOW SQUALLS OCCUR, INTENSE SNOW RATES WILL PRODUCE
RAPID DROPS IN VISIBILITY AND ICING ON ROADWAYS, RESULTING IN
DANGEROUS TRAVEL.
IN ADDITION, MUCH COLDER AIR WILL MOVE IN BEHIND THE STRONG COLD
FRONT. TEMPERATURES WILL FALL INTO THE TEENS AND SINGLE DIGITS
TUESDAY MORNING THROUGHOUT THE INTERMOUNTAIN WEST.
ANOTHER POWERFUL STORM WILL MOVE OVER THE WEST, PRODUCING A
SIGNIFICANT WINTER STORM OVER THE PACIFIC NORTHWEST LATE WEDNESDAY
INTO THURSDAY, AS HEAVY SNOW RETURNS TO THE NORTHERN CASCADES AND
NORTHERN INTERMOUNTAIN REGION.
MEANWHILE, ON TUESDAY, A FRONT EXTENDING FROM THE UPPER GREAT
LAKES TO THE CENTRAL ROCKIES WILL CREATE HEAVY SNOW OVER PARTS OF
THE UPPER MISSISSIPPI VALLEY AND MODERATE TO HEAVY SNOW OVER THE
UPPER GREAT LAKES. AHEAD OF THE FRONT, SOUTHERLY WIND WILL BRING
WARM TEMPERATURES OF 15 TO 30 DEGREES ABOVE AVERAGE TO THE
SOUTHERN PLAINS TO THE GREAT LAKES. THE WARM AND DRY CONDITIONS
WITH GUSTY WINDS ACROSS THE SOUTHERN PLAINS HAVE RESULTED IN AN
ELEVATED RISK OF FIRE WEATHER (LEVEL 1/3) FROM THE STORM
PREDICTION CENTER ON TUESDAY.
ADDITIONALLY, MOISTURE FROM THE WESTERN GULF OF MEXICO WILL STREAM
NORTHWARD OVER THE SOUTHERN PLAINS, MIDDLE/LOWER MISSISSIPPI
VALLEY, AND OHIO VALLEY. THE MOISTURE WILL AID IN CREATING SHOWERS
AND SEVERE THUNDERSTORMS OVER PARTS OF THE OHIO VALLEY. THEREFORE,
THE SPC HAS ISSUED A SLIGHT RISK (LEVEL 2/5) OF SEVERE
THUNDERSTORMS OVER PARTS OF THE OHIO VALLEY, MIDDLE MISSISSIPPI
VALLEY, AND GREAT LAKES THROUGH WEDNESDAY MORNING. THE HAZARDS
ASSOCIATED WITH THESE THUNDERSTORMS ARE FREQUENT LIGHTNING, SEVERE
THUNDERSTORM WIND GUSTS, HAIL, AND A FEW TORNADOES. FURTHER, THERE
IS AN INCREASED THREAT OF HAIL TWO INCHES OR GREATER OVER PARTS OF
SOUTHWESTERN MICHIGAN, MOST OF ILLINOIS AND INDIANA, PLUS
SOUTHEASTERN MISSOURI.
MOREOVER, AS THE ROBUST FRONT MOVES ACROSS THE GREAT LAKES TO THE
EAST COAST, MODERATE TO HEAVY SNOW WILL DEVELOP OVER THE GREAT
LAKES INTO THE NORTHEAST, WITH LIGHT TO MODERATE SNOW OVER THE
CENTRAL APPALACHIANS ON WEDNESDAY INTO THURSDAY MORNING. AHEAD OF
THE SNOW, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE
NORTHEAST. THE BOUNDARY WILL ALSO CREATE SHOWERS AND THUNDERSTORMS
OVER PARTS OF THE EASTERN OHIO VALLEY, CENTRAL APPALACHIANS, INTO
THE MID-ATLANTIC AND SOUTHEAST.
ELSEWHERE, UPPER-LEVEL ENERGY MOVING INTO THE SOUTHWEST AND
SOUTHERN ROCKIES WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS
FROM WEDNESDAY AFTERNOON INTO THURSDAY MORNING.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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