080
FXUS01 KWBC 260714
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
213 AM EST THU DEC 26 2024
VALID 12Z THU DEC 26 2024 - 12Z SAT DEC 28 2024
...CONTINUED ROUNDS OF HEAVY RAIN AND MOUNTAIN SNOW FOR THE
PACIFIC NORTHWEST...
...HEAVY RAIN AND STRONG THUNDERSTORMS RETURN FOR EASTERN TEXAS
INTO LOUISIANA ON THURSDAY...
...RELATIVELY MILD CONDITIONS ACROSS THE MAJORITY OF THE COUNTRY
THROUGH FRIDAY...
THE VERY ACTIVE STORM TRACK ACROSS THE EASTERN PACIFIC AND INTO
THE PACIFIC NORTHWEST WILL CONTINUE TO MAKE WEATHER HEADLINES
THROUGH THE END OF THE WEEK. THE NEXT IN A SERIES OF ATMOSPHERIC
RIVER EVENTS IS NOW ONGOING ACROSS THE PACIFIC NORTHWEST, WITH
MODERATE TO HEAVY RAINFALL AND A FEW THUNDERSTORMS CONTINUING INTO
THURSDAY MORNING. THIS ROUND WILL LIKELY RESULT IN WIDESPREAD 1
TO 3 INCH RAINFALL TOTALS, AND THERE MAY BE SOME INSTANCES OF
FLOODING WHERE RAINFALL RATES ARE HIGHEST. ONCE THIS FIRST SYSTEM
MOVES INLAND, THERE WILL BE A SHORT-LIVED BREAK THURSDAY AFTERNOON
BEFORE THE NEXT ROUND ARRIVES THURSDAY NIGHT FOR MANY OF THE SAME
AREAS, BRINGING AN ADDITIONAL 1-2 INCHES OF RAIN BY FRIDAY
MORNING. STRONG AND POTENTIALLY DAMAGING WINDS ARE ALSO EXPECTED
NEAR THE COAST AND THE COASTAL WATERS GIVEN A STRONG LOW LEVEL JET
WITH THESE STORM SYSTEMS. THE CASCADES AND THE OLYMPIC MOUNTAINS
WILL GET HAMMERED WITH HEAVY SNOW ON THE ORDER OF 1-3 FEET, WHERE
WINTER STORM WARNINGS ARE IN EFFECT, AND LIGHTER SNOWS HEADING
SOUTH INTO NORTHERN CALIFORNIA WITH WINTER WEATHER ADVISORIES.
THE HIGHER TERRAIN OF THE NORTHERN INTERMOUNTAIN WEST AND THE
NORTHERN ROCKIES WILL ALSO GET NOTEWORTHY SNOWFALL AS MOISTURE
FROM THIS STORM SYSTEM MOVES INLAND.
UNSETTLED WEATHER CONDITIONS ARE ALSO EXPECTED FOR PORTIONS OF THE
SOUTH-CENTRAL U.S. GOING INTO THURSDAY, WITH AN AMPLIFYING UPPER
TROUGH DEVELOPING A NEW SURFACE LOW AND MOISTURE PLUME FROM THE
WESTERN GULF, HERALDING THE DEVELOPMENT OF SCATTERED TO WIDESPREAD
SHOWERS AND THUNDERSTORMS. BOTH WIND SHEAR AND INSTABILITY
PARAMETERS APPEAR TO BECOME INCREASINGLY FAVORABLE FOR SOME SEVERE
WEATHER ON THURSDAY, AND THEREFORE THE STORM PREDICTION CENTER HAS
PORTIONS OF THE ARKLATEX REGION IN A SLIGHT RISK FOR SEVERE
STORMS. HEAVY RAINFALL COULD ALSO BE AN ISSUE WHERE THESE STORMS
TRAIN OVER THE SAME AREAS, AND THERE IS A SLIGHT RISK OF FLASH
FLOODING FROM EASTERN TEXAS TO CENTRAL ARKANSAS. AN AXIS OF HEAVY
RAIN IS LIKELY ACROSS PORTIONS OF THE MID-SOUTH GOING INTO FRIDAY
AS THE STORM SYSTEM SLOWLY MOVES EASTWARD.
ELSEWHERE ACROSS THE COUNTRY, MAINLY DRY CONDITIONS ARE FORECAST
ACROSS THE DESERT SOUTHWEST, NORTHERN PLAINS, AND THE NORTHEAST
U.S. TO CLOSE OUT THE WEEK. FOGGY CONDITIONS ARE ONCE AGAIN
LIKELY ACROSS PORTIONS OF THE MIDWEST AND THE CENTRAL PLAINS
THURSDAY AND FRIDAYS MORNINGS WITH WARM/MOIST AIR ADVECTION OVER
COLD GROUND. IN TERMS OF TEMPERATURES, FORECAST HIGHS THURSDAY
AND FRIDAY GENERALLY RANGE FROM THE 30S AND 40S FOR THE NORTHERN
ROCKIES/PLAINS EASTWARD TO THE GREAT LAKES AND NEW
ENGLAND/MID-ATLANTIC; THE 40S AND 50S FOR THE PACIFIC NORTHWEST
AND NORTHERN CALIFORNIA EASTWARD ACROSS MUCH OF THE INTERMOUNTAIN
WEST, CENTRAL ROCKIES/PLAINS, AND EXTENDING EASTWARD TO THE OHIO
VALLEY; THE 50S AND 60S FOR THE MID-SOUTH AND THE SOUTHEAST U.S.
STATES; AND THE MIDDLE 60S TO NEAR 80 DEGREES FOR SOUTHERN
CALIFORNIA, THE DESERT SOUTHWEST, MUCH OF TEXAS, AND FLORIDA.
HAMRICK
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page