359
FXUS01 KWBC 130741
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
341 AM EDT FRI JUN 13 2025
VALID 12Z FRI JUN 13 2025 - 12Z SUN JUN 15 2025
...HEAVY TO EXCESSIVE RAINFALL LIKELY ACROSS PORTIONS OF THE
EAST-CENTRAL U.S. OVER THE NEXT COUPLE OF DAYS...
...HEATWAVE EXPECTED FOR THE DESERT SOUTHWEST WITH HIGHS REACHING
THE 110S BY THIS WEEKEND...
THE MAIN THING MAKING WEATHER HEADLINES FRIDAY AND INTO THE
WEEKEND WILL BE THE WIDESPREAD COVERAGE OF SHOWERS AND
THUNDERSTORMS ACROSS MUCH OF THE CENTRAL AND EASTERN U.S., WITH A
PARTICULAR FOCUS ACROSS SOUTHEAST TEXAS, THE MID-SOUTH, AND
PORTIONS OF VIRGINIA. AREAS FROM THE GREATER CHICAGO METRO AREA
TO WASHINGTON D.C. WILL MARK THE GENERAL PLACEMENT OF A SLOW
MOVING FRONTAL BOUNDARY, AND AREAS SOUTH OF THAT WILL BE IN A WARM
AND HUMID AIRMASS WITH MULTIPLE WEAK DISTURBANCES ALOFT THAT WILL
HELP TO GENERATE DAILY SHOWERS AND THUNDERSTORMS. MULTIPLE SLIGHT
RISK AREAS OF EXCESSIVE RAINFALL ARE IN EFFECT FOR PORTIONS OF
THESE AREAS ON FRIDAY, AND VIRGINIA ALSO WILL HAVE A SLIGHT RISK
OF EXCESSIVE RAINFALL ON SATURDAY WITH SLOW MOVING SHOWERS AND
STORMS CONTINUING NEAR THE INTERSTATE 64 CORRIDOR.
ANOTHER AREA OF MODERATE TO HEAVY RAINFALL IS ALSO EXPECTED ACROSS
PORTIONS OF THE UPPER MIDWEST, MAINLY OVER CENTRAL MINNESOTA
THROUGH MIDDAY FRIDAY WHERE 1 TO 2 INCHES IS CURRENTLY FORECAST.
THIS MAY BE ENOUGH TO RESULT IN SOME LOCALIZED FLOODING ISSUES,
AND WPC HAS A MARGINAL RISK OF EXCESSIVE RAINFALL FOR FRIDAY TO
ACCOUNT FOR THIS, ALTHOUGH THE HEAVIEST RAINFALL IS EXPECTED PRIOR
TO DAYBREAK FRIDAY. THIS WILL BE THE RESULT OF MOISTURE FROM THE
SOUTH INTERSECTING A FRONTAL BOUNDARY PAIRED WITH A MID-LEVEL
SHORTWAVE DISTURBANCE MOVING THROUGH THE REGION. FARTHER WEST
ACROSS THE WESTERN HIGH PLAINS, SCATTERED SEVERE THUNDERSTORMS ARE
FORECAST TO DEVELOP ON FRIDAY FROM SOUTHERN MONTANA TO THE TEXAS
PANHANDLE AS A MID-UPPER LEVEL SHORTWAVE TRACKS FROM THE PACIFIC
NORTHWEST TOWARDS THIS REGION.
IT WILL CONTINUE TO BE QUITE WARM AND DRY FRIDAY AND INTO THE
WEEKEND ACROSS MUCH OF THE INTERIOR WESTERN U.S. AS AN UPPER LEVEL
RIDGE GOVERNS THE OVERALL WEATHER PATTERN. THE MOST IMPACTFUL
HEAT WILL BE ACROSS THE LOWER ELEVATIONS OF THE DESERT SOUTHWEST
WHERE AFTERNOON HIGHS WILL REACH 105 TO 110 DEGREES THROUGH
FRIDAY, AND THEN REACHING THE 110S OVER THE WEEKEND. THEREFORE,
AN EXTREME HEAT WARNING IS NOW IN EFFECT ACROSS MOST OF SOUTHERN
ARIZONA AND INTO EXTREME SOUTHEAST CALIFORNIA AS THE HEATWAVE
BUILDS. THERE ARE ALSO SOME ELEVATED FIRE WEATHER CONCERNS ACROSS
PORTIONS OF WESTERN NEVADA, AND ALSO CENTRAL OREGON AND WASHINGTON
ON FRIDAY OWING TO DRY CONDITIONS AND GUSTY WINDS. A COLD FRONT
DROPPING SOUTHEAST ACROSS THE PACIFIC NORTHWEST WILL RESULT IN AN
ABATEMENT OF THE ONGOING HEAT AND A RETURN TO MORE SEASONABLE
CONDITIONS FOR MUCH OF WASHINGTON AND OREGON. THE COOLEST AREAS
IN THE COUNTRY WILL BE NORTH OF A FRONTAL BOUNDARY ACROSS THE
NORTHERN PLAINS AND GREAT LAKES AREAS, WITH REFRESHINGLY COOL
CONDITIONS AND HIGHS MAINLY IN THE 60S.
HAMRICK
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