578
FXUS01 KWBC 312000
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT TUE OCT 31 2023
VALID 00Z WED NOV 01 2023 - 00Z FRI NOV 03 2023
...MUCH COLDER FALL TEMPERATURES TO BRING WIDESPREAD FROST/FREEZE
FROM THE SOUTHERN PLAINS TO THE MID-ATLANTIC...
...SNOW SHOWERS TO SWING ACROSS THE GREAT LAKES AND PARTS OF THE
MIDWEST...
...ATMOSPHERIC RIVER USHERS IN WET WEATHER TO THE PACIFIC
NORTHWEST BY MIDWEEK...
A STRONG COLD FRONT HAS USHERED IN SOME OF THE COLDEST
TEMPERATURES OF THE FALL THROUGHOUT THE CENTRAL/EASTERN U.S. AFTER
A BRISK HALLOWEEN EVENING, TEMPERATURES ARE EXPECTED TO FALL TO
NEAR OR BELOW FREEZING FROM THE SOUTHERN PLAINS EAST THROUGH THE
LOWER MISSISSIPPI AND TENNESSEE VALLEYS AND INTO THE APPALACHIANS
WEDNESDAY MORNING, AND FURTHER INTO THE SOUTHEAST AND MID-ATLANTIC
BY THURSDAY MORNING. WIDESPREAD FROST AND FREEZE-RELATED
ADVISORIES ARE IN PLACE, AND NUMEROUS RECORD-TYING/BREAKING LOW
TEMPERATURES MAY BE REALIZED. IT IS LIKELY MANY AREAS WILL END
THEIR GROWING SEASON OVER THE NEXT FEW DAYS FROM THE SOUTHERN
PLAINS TO THE MID-ATLANTIC, INCLUDING PARTS OF THE DEEP SOUTH.
EXPOSED WATER PIPES WILL ALSO BE AT RISK OF FREEZING OR BURSTING
IF PROPER PRECAUTIONS ARE NOT TAKEN. AFTERNOON HIGH TEMPERATURES
WILL ALSO BE WELL BELOW AVERAGE, WITH MOST LOCATIONS OUTSIDE OF
FAR SOUTH TEXAS AND FLORIDA ONLY IN THE 50S WEDNESDAY, INCLUDING
SOME 40S FOR THE TENNESSEE VALLEY. HIGHS SHOULD REBOUND A BIT ON
THURSDAY AS THE AIRMASS MODERATES WITH MID-50S AND 60S EXPECTED.
THE STORM PREDICTION CENTER HAS NOTED THE RISK FOR SOME ELEVATED
FIRE WEATHER CONDITIONS ALONG THE GULF COAST WHERE TEMPERATURES
WILL BE A BIT WARMER AND CONDITIONS WILL BE DRY WITH GUSTY WINDS
FOLLOWING THE FRONTAL PASSAGE.
WITHIN THIS COLD AIRMASS IN PLACE, A COMPACT AREA OF LOW PRESSURE
CUTTING ACROSS THE UPPER MIDWEST AND GREAT LAKES TODAY WILL
PROVIDE THE CHANCE FOR SCATTERED SNOW SHOWERS THIS EVENING AND
INTO EARLY WEDNESDAY, ESPECIALLY FOR FAVORED LAKE-EFFECT REGIONS
WHERE SOME LIGHT TO MODERATE ACCUMULATIONS ARE FORECAST.
PRECIPITATION CHANCES WILL SPREAD EASTWARD INTO THE NORTHEAST
DURING THE DAY WEDNESDAY, WITH SOME LIGHT RAIN SHOWERS FOR LOWER
ELEVATION AND COASTAL LOCATIONS AND A MIX OF RAIN/SNOW FOR SOME OF
THE LOCAL MOUNTAIN RANGES, THOUGH LITTLE TO NO ACCUMULATIONS ARE
EXPECTED. HIGH TEMPERATURES WILL BE CHILLY WITH 30S AND 40S FOR
MOST LOCATIONS.
HEAVIER RAIN IS EXPECTED TO IMPACT THE PACIFIC NORTHWEST BY
WEDNESDAY EVENING TO KICK OFF THE START OF NOVEMBER. AN
ATMOSPHERIC RIVER MOVING ONSHORE WASHINGTON AND OREGON WILL
PRODUCE A FEW INCHES OF RAIN BY THE END OF THE DAY ON THURSDAY,
WITH WARM PACIFIC AIR ALSO RISING SNOW LEVELS ABOVE 8000 FEET SO
THAT EVEN MOST OF THE CASCADES EXPERIENCE MODERATE TO LOCALLY
HEAVY RAIN. SOME ISOLATED FLOODING IS POSSIBLE ESPECIALLY AS SOILS
BECOME MORE SATURATED AFTER PREVIOUSLY DRIER CONDITIONS. HIGH
TEMPERATURES WILL GENERALLY BE ABOVE AVERAGE ALONG THE IMMEDIATE
WEST COAST, WITH 60S FOR THE PACIFIC NORTHWEST AND NORTHERN
CALIFORNIA, 70S FOR CENTRAL CALIFORNIA, AND 80S FOR SOUTHERN
CALIFORNIA. CONDITIONS WILL BE CLOSER TO AVERAGE BUT STILL MILD
FURTHER INTO THE INTERIOR WEST WITH 50S AND 60S FOR MUCH OF THE
ROCKIES AND GREAT BASIN AND 70S AND 80S IN THE DESERT SOUTHWEST.
PUTNAM/SNELL
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