602
FXUS01 KWBC 090336
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1035 PM EST FRI DEC 08 2023
VALID 12Z SAT DEC 09 2023 - 12Z MON DEC 11 2023
...EXCESSIVE RAINFALL AND HEAVY SNOW FOR PACIFIC NORTHWEST AND
NORTHERN ROCKIES THIS WEEKEND...
...SEVERE WEATHER POSSIBLE FROM ARKLATEX TO TENNESSEE VALLEY
TODAY; EXCESSIVE RAINFALL CONCERNS FOR PARTS OF THE NORTHEAST ON
SUNDAY...
...WARM AIR SPREADS FROM MIDWEST TO EAST COAST THIS WEEKEND; COOL
AIR SHIFTS FROM ROCKIES TO DEEP SOUTH...
A LOW PRESSURE SYSTEM WILL BRING HEAVY RAINFALL TO THE
WASHINGTON/OREGON COAST TONIGHT WHILE HEAVY SNOW DEVELOPS OVER THE
OLYMPICS AND NORTHERN CASCADES. THERE'S A SLIGHT RISK OF EXCESSIVE
RAINFALL LEADING TO FLASH FLOODING FOR THE AFOREMENTIONED COASTAL
AREAS WHERE THE GREATEST RISK OF HIGH RAIN RATES WILL OCCUR.
MODERATE TO HEAVY SNOW WILL SUBSEQUENTLY SPREAD INTO THE NORTHERN
ROCKIES EARLY SUNDAY MORNING.
AN UPPER TROUGH WILL AMPLIFY OVER THE PLAINS AND MISSISSIPPI
VALLEY AND DRAW A DEEP COLUMN OF MOISTURE FROM THE GULF OF MEXICO.
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG A COLD
FRONT EXTENDING FROM THE GULF COAST UP TO THE UPPER GREAT LAKES
WHERE THE SURFACE LOW PRESSURE CENTER WILL BE MOVING THROUGH. SOME
THUNDERSTORMS MAY TURN SEVERE FROM THE ARKLATEX TO THE TENNESSEE
VALLEY TODAY, WHERE A FEW TORNADOES, SCATTERED DAMAGING WINDS AND
LARGE HAIL WILL BE POSSIBLE. RAIN AND THUNDERSTORMS WILL SPREAD
INTO THE EAST COAST ON SUNDAY. THERE'S A SLIGHT RISK OF EXCESSIVE
RAINFALL LEADING TO FLASH FLOODING FOR PARTS OF THE COASTAL
NORTHEAST THAT DAY.
MEANWHILE, COOL AIR WILL DESCEND FROM THE ROCKIES INTO THE
SOUTHERN PLAINS AND MISSISSIPPI VALLEY AS HIGH PRESSURE BUILDS
OVER MUCH OF THE WEST THIS WEEKEND. ABNORMALLY WARM AIR WILL
SPREAD INTO THE EAST OVER THE NEXT COUPLE OF DAYS OUT AHEAD OF THE
APPROACHING COLD FRONT. WIDESPREAD LOW TEMPERATURE RECORDS MAY BE
TIED OR BROKEN SUNDAY NIGHT AS A RESULT. VERY DRY CONDITIONS WITH
GUSTY WINDS WILL SUPPORT ELEVATED FIRE WEATHER RISK OVER PARTS OF
THE SOUTHERN HIGH PLAINS AND SOUTHERN CALIFORNIA TODAY.
KEBEDE
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