864
FXUS01 KWBC 021945
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
344 PM EDT TUE MAY 02 2023
VALID 00Z WED MAY 03 2023 - 00Z FRI MAY 05 2023
...MUCH BELOW AVERAGE TEMPERATURES EXPECTED WEDNESDAY ACROSS THE
NORTHEAST AND MID-ATLANTIC...
...MODERATE TO HEAVY SNOW IN THE WEST VIRGINIA APPALACHIANS WILL
CONTINUE INTO WEDNESDAY...
...MUCH ABOVE AVERAGE TEMPERATURES IN THE NORTHWEST WILL CAUSE
SNOWMELT AND FLOODING CONCERNS THIS WEEK...
...SCATTERED SEVERE THUNDERSTORMS POSSIBLE IN THE SOUTHERN PLAINS
THURSDAY...
A BROAD AREA OF LOW PRESSURE CHURNING OVER THE EASTERN GREAT LAKES
REGION HAS KEPT THE NORTHEASTERN QUARTER OF THE COUNTRY COOL AND
DAMP TODAY. HIGH TEMPERATURES WERE ABOUT 15-25 DEGREES BELOW
AVERAGE FOR THE GREAT LAKES REGION AND PARTS OF THE NORTHERN AND
CENTRAL APPALACHIANS. MUCH BELOW AVERAGE TEMPERATURES ARE EXPECTED
TO SHIFT EAST ON WEDNESDAY INTO THE MID-ATLANTIC AND NORTHEAST
WHERE HIGHS ARE FORECAST TO BE IN THE 40S AND 50S. SHOWERS ARE
ONGOING ACROSS THE GREAT LAKES, MID-ATLANTIC, AND NORTHEAST AND
WILL CONTINUE THROUGH WEDNESDAY INTO THURSDAY. MIXED PRECIPITATION
AND SNOW SHOWERS WILL BE POSSIBLE IN THE HIGHER ELEVATIONS,
ESPECIALLY IN THE WEST VIRGINIA APPALACHIANS WHERE MODERATE TO
HEAVY SNOW IS EXPECTED THROUGH WEDNESDAY MORNING. WINTER STORM
WARNINGS AND WINTER WEATHER ADVISORIES ARE IN EFFECT FOR PARTS OF
WEST VIRGINIA AND GARRETT COUNTY, MARYLAND.
IN CONTRAST TO THE COOL CONDITIONS IN THE EAST, THE NORTHWESTERN
U.S. IS EXPERIENCING MUCH ABOVE NORMAL TEMPERATURES. HIGH
TEMPERATURES WERE IN THE 70S AND 80S TODAY, WHICH IS ABOUT 15-25
DEGREES ABOVE AVERAGE. HIGHS WILL REMAIN MUCH ABOVE AVERAGE
THROUGH THURSDAY AND CAUSE SNOW IN THE HIGHER ELEVATIONS TO MELT
DURING THE DAY. SNOWMELT COULD LEAD TO FLOODING CONCERNS ALONG
RIVERS AND STREAMS IN THE INTERMOUNTAIN WEST FROM THE U.S./CANADA
BORDER SOUTH THROUGH UTAH AND NORTHWESTERN COLORADO. FLOOD WATCHES
AND FLOOD ADVISORIES ARE IN EFFECT FOR AREAS WHERE FLOODING IS
MOST LIKELY THIS WEEK. A FRONTAL SYSTEM WILL APPROACH THE REGION
FROM THE NORTHWEST THURSDAY INTO FRIDAY, WHICH WILL INCREASE
PRECIPITATION AND DECREASE TEMPERATURES ACROSS THE REGION.
IN THE SOUTHERN PLAINS, A STATIONARY FRONT WILL REMAIN DRAPED
ACROSS THE AREA THROUGH THURSDAY THEN LIFT NORTHEAST AS A WARM
FRONT THURSDAY NIGHT INTO FRIDAY. CONDITIONS ACROSS THE REGION
WILL BE FAVORABLE FOR THUNDERSTORMS EACH DAY, AND SCATTERED SEVERE
STORMS WILL BE POSSIBLE ON THURSDAY AFTERNOON AND EVENING IN PARTS
OF TEXAS AND OKLAHOMA WHERE THE STORM PREDICTION CENTER HAS ISSUED
A SLIGHT RISK OF SEVERE THUNDERSTORMS (LEVEL 2/5). SEVERE STORMS
WILL BE CAPABLE OF PRODUCING LARGE HAIL, DAMAGING WINDS, AND A
COUPLE TORNADOES.
ELSEWHERE, CONDITIONS ARE RELATIVELY MILD. HIGH PRESSURE IS
FORECAST TO BUILD OVER THE MID-SOUTH AND SOUTHEAST THROUGH
THURSDAY, WHICH WILL KEEP CONDITIONS DRY. MOST OF THE SOUTHWEST
REGION WILL REMAIN DRY THROUGH THE WEEK AS WELL, EXCEPT FOR
CALIFORNIA. A LOW PRESSURE CENTER IS FORECAST TO SLOWLY DRIFT
SOUTH ALONG THE CALIFORNIA COAST THROUGH THE WEEK, CAUSING SHOWERS
AND THUNDERSTORMS IN COASTAL AND VALLEY AREAS AND MIXED
PRECIPITATION IN HIGHER ELEVATIONS.
DOLAN
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