339
FXUS01 KWBC 250713
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
213 AM EST SAT JAN 25 2025
VALID 12Z SAT JAN 25 2025 - 12Z MON JAN 27 2025
...PRECIPITATION IN SOUTHERN CALIFORNIA WILL EASE WILDFIRE
CONDITIONS BUT COULD RESULT IN LOCALIZED DEBRIS FLOWS AND FLASH
FLOODING...
...ELEVATED WILDFIRE CONCERNS OVER PORTIONS OF ARIZONA THIS
WEEKEND...
A DEEP UPPER LOW AND ASSOCIATED FRONTAL SYSTEM ARE WORKING THEIR
WAY SOUTH ACROSS THE WESTERN U.S., BRINGING SNOW FROM THE GREAT
BASIN EAST TO THE ROCKIES AND CENTRAL HIGH PLAINS. THE UPPER LOW
IS FORECAST TO GRADUALLY STALL, RESULTING IN PERSISTENT LOW
PRESSURE OVER THE SOUTHWEST THROUGH MONDAY. AS LOW PRESSURE
STRENGTHENS, WINDS AND PRECIPITATION WILL INCREASE ACROSS THE
REGION. STRONG GUSTY WINDS AND DRY CONDITIONS WILL LIKELY RESULT
IN ELEVATED WILDFIRE CONCERNS OVER PORTIONS OF ARIZONA WHILE
PRECIPITATION EASES FIRE WEATHER CONDITIONS IN SOUTHERN
CALIFORNIA. DUE TO INCREASED SENSITIVITY FROM RECENT WILDFIRES,
MODERATE TO LOCALLY HEAVY RAIN COULD RESULT IN DEBRIS FLOWS AND
FLASH FLOODING IN OR AROUND BURN SCARS IN SOUTHERN CALIFORNIA.
EAST OF THE ROCKIES, LOW PRESSURE TRACKING ALONG THE U.S.-CANADA
BORDER WILL PUSH A COUPLE OF FRONTAL SYSTEMS SOUTH ACROSS THE
CENTRAL U.S. WHILE HIGH PRESSURE BUILDS OVER THE SOUTHEAST TODAY.
THE LEADING FRONT WILL EXTEND FROM THE SOUTHERN PLAINS TO THE
GREAT LAKES, BUT PRECIPITATION CHANCES WILL BE LIMITED TO THE
SOUTHERN PLAINS AND GREAT LAKES REGIONS. THE SECOND FRONT WILL
TRIGGER SNOW SHOWERS OVER THE NORTHERN PLAINS AND UPPER MIDWEST
TODAY BEFORE CATCHING UP WITH THE LEADING FRONT THIS AFTERNOON.
THE SOUTHERN PORTION OF THE FRONT WILL SLOWLY SAG TOWARDS THE GULF
COAST SUNDAY INTO MONDAY WHILE THE NORTHERN PORTION PUSHES ACROSS
THE NORTHEAST AND MID-ATLANTIC. SHOWER AND THUNDERSTORM CHANCES
WILL CONTINUE IN THE SOUTHERN PLAINS AND SPREAD INTO THE LOWER
MISSISSIPPI VALLEY AND SOUTHEAST. LOCALLY HEAVY RAINFALL MAY LEAD
TO ISOLATED INSTANCES OF FLASH FLOODING ON SUNDAY FOR PORTIONS OF
THE TEXAS GULF COAST AND LOWER MISSISSIPPI VALLEY. WINTRY
PRECIPITATION CHANCES WILL ALSO SPREAD INTO THE NORTHERN/CENTRAL
APPALACHIANS AND INTERIOR NEW ENGLAND, WITH THE LOCALLY HEAVY SNOW
POSSIBLE IN NORTHERN NEW YORK DOWNWIND OF LAKE ONTARIO.
TODAY WILL MARK THE START OF A WARMING TREND IN TEMPERATURES ALONG
THE GULF AND EAST COASTS. HIGH TEMPERATURES WILL GENERALLY BE 5-15
DEGREES BELOW AVERAGE THIS AFTERNOON, THEN RETURN TO NEAR AVERAGE
VALUES SUNDAY AND MONDAY. A COOLER AIR MASS WILL MOVE ACROSS THE
CENTRAL U.S. IN THE WAKE OF A COLD FRONT THIS WEEKEND, WITH THE
COLDEST ANOMALIES EXPECTED IN THE ROCKIES AND HIGH PLAINS WHERE
TEMPERATURES WILL BE 15-25 DEGREES BELOW AVERAGE TODAY. AN
EASTWARD MOVING WARM FRONT WILL BRING ABOVE AVERAGE TEMPERATURES
TO THE NORTH-CENTRAL U.S. BY MONDAY. WEST OF THE ROCKIES,
TEMPERATURES WILL GENERALLY BE BELOW AVERAGE UNDER THE INFLUENCE
OF THE UPPER LOW, AND PRECIPITATION AND CLOUD COVER WILL RESULT IN
HIGHS FALLING TO 10-20 DEGREES BELOW AVERAGE IN THE SOUTHWEST.
DOLAN
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