472
FXUS01 KWBC 090810
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
410 AM EDT WED APR 09 2025
VALID 12Z WED APR 09 2025 - 12Z FRI APR 11 2025
...BELOW NORMAL TEMPERATURES CONTINUE ACROSS THE EAST WHILE WELL
ABOVE NORMAL AND NEAR-RECORD WARMTH BUILDS ACROSS THE WEST...
...SEVERE WEATHER EXPECTED ACROSS PORTIONS OF THE MID/DEEP SOUTH
AND TENNESSEE VALLEY ON THURSDAY...
...PAIR OF LOW PRESSURE SYSTEMS TO BRING INCREASINGLY UNSETTLED
WEATHER TO MUCH OF THE EAST THURSDAY INTO FRIDAY...
IN THE WAKE OF A STRONG COLD FRONT, TEMPERATURES ACROSS MUCH OF
THE EASTERN U.S. WILL CONTINUE TO RUN 10 TO 20 DEGREES BELOW
NORMAL ON WEDNESDAY. AFTER A VERY CHILLY START WITH LOWS NEARING,
AT, OR BELOW FREEZING FOR MANY, HIGH TEMPERATURES WILL RANGE FROM
THE 20S AND 30S ACROSS THE NORTHERN INTERIOR SECTIONS OF THE
NORTHEAST, TO THE 30S, 40S, AND 50S, FROM THE UPPER MIDWEST TO THE
MID-ATLANTIC. FARTHER SOUTH, HIGHS WILL TOP OUT IN THE 50S, 60S,
AND 70S FROM THE OHIO VALLEY AND SOUTHERN MID-ATLANTIC TO THE
SOUTHEAST AND GULF COAST. DESPITE SOME LIKELY MODERATION,
TEMPERATURES FOR MOST OF THE EAST WILL REMAIN BELOW NORMAL INTO
THE WEEKEND THANKS TO A LARGE AND DEEPENING UPPER LEVEL TROUGH AND
A PAIR OF LOW PRESSURE SYSTEMS. IN STARK CONTRAST, A LARGE UPPER
LEVEL RIDGE WILL BUILD OVER THE WESTERN U.S. THE NEXT FEW DAYS,
RESULTING IN MAINLY DRY WEATHER AND WELL ABOVE NORMAL
TEMPERATURES. IN FACT, HIGH TEMPERATURE ANOMALIES ACROSS THE WEST
WILL CLIMB TO BETWEEN 10 AND 30 DEGREES ABOVE SEASONAL NORMS
THROUGH FRIDAY, TRANSLATING TO HIGHS IN THE 50S AND 60S ACROSS THE
FAR NORTH/PACIFIC NORTHWEST, TO THE 70S AND 80S OUTSIDE OF THE
MOUNTAINS FARTHER SOUTH, TO THE 90S AND 100S ACROSS PORTIONS OF
THE DESERT SOUTHWEST AND SOUTHERN PLAINS. HIGH TEMPERATURES MAY
EVEN APPROACH OR POSSIBLY BREAK RECORDS FOR MANY PLACES THURSDAY,
FRIDAY AND INTO THE WEEKEND.
AS ALLUDED TO ABOVE, A HIGHLY AMPLIFIED PATTERN WILL BEGIN TO TAKE
SHAPE THE NEXT FEW DAYS, WITH A LARGE RIDGE BUILDING OVER THE WEST
AND A DEEPENING TROUGH OVER THE EAST. WHILE THE RIDGE WILL KEEP
MOST OF THE WEST OUTSIDE OF THE PACIFIC NORTHWEST MAINLY DRY
THROUGH FRIDAY, THE TROUGH WILL BRING INCREASINGLY UNSETTLED AND
STORMY WEATHER TO THE EAST. THIS PERIOD OF WETTER WEATHER STARTS
WITH A GENERALLY WEAK LOW PRESSURE SYSTEM THAT WILL TRACK FROM THE
UPPER MIDWEST, TO THE OHIO VALLEY, TO THE GREAT LAKES AND
NORTHEAST THROUGH THURSDAY. THIS WILL BRING LIGHT RAIN AND SNOW
SHOWERS TO THE REGION, WITH SNOW MAINLY CONFINED TO THE UPPER
MIDWEST, GREAT LAKES, AND INTERIOR NORTHEAST. A SECOND, STRONGER
LOW PRESSURE SYSTEM WILL DEVELOP ACROSS THE OHIO AND TENNESSEE
VALLEYS ON THURSDAY BEFORE TRACKING INTO THE MID-ATLANTIC AND
NORTHEAST FRIDAY INTO SATURDAY. AHEAD OF THE DEVELOPING LOW,
INCREASING MOISTURE AND INSTABILITY WILL SET THE STAGE FOR A
SEVERE WEATHER THREAT ACROSS PORTIONS OF THE MID/DEEP SOUTH AND
THE TENNESSEE VALLEY ON THURSDAY. AS A RESULT, THE STORM
PREDICTION CENTER HAS ISSUED A SLIGHT RISK (LEVEL 2/5) FOR
POTENTIAL SEVERE THUNDERSTORMS THAT ARE CAPABLE OF PRODUCING LARGE
HAIL AND DAMAGING WINDS. THE SEVERE WEATHER THREAT THEN
TRANSITIONS TO A CONCERN FOR MODERATE TO LOCALLY HEAVY RAIN ACROSS
PORTIONS OF THE MID-ATLANTIC AND NORTHEAST ON FRIDAY, WITH THE
WEATHER PREDICTION CENTER ISSUING A MARGINAL RISK (LEVEL 1/4) OF
EXCESSIVE RAINFALL. WHILE PARTS OF THE MID-ATLANTIC AND NORTHEAST
COULD CERTAINLY USE THE RAIN, ISOLATED TO SCATTERED INSTANCES OF
FLOODING, PARTICULARLY IN URBAN, LOW-LYING, OR POOR DRAINAGE
AREAS, CANNOT BE RULED OUT.
MILLER
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