134
FXUS01 KWBC 060658
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
157 AM EST WED DEC 06 2023
VALID 12Z WED DEC 06 2023 - 12Z FRI DEC 08 2023
...EXCESSIVE RAINFALL AND FLOODING POTENTIAL CONTINUES ACROSS THE
PACIFIC NORTHWEST...
...MODERATE UPSLOPE SNOW FORECAST ACROSS THE CENTRAL AND SOUTHERN
APPALACHIANS TODAY...
...WELL ABOVE AVERAGE AND POTENTIALLY RECORD-BREAKING WARMTH
FORECAST ACROSS THE CENTRAL UNITED STATES OVER THE NEXT FEW DAYS...
AN ATMOSPHERIC RIVER IS FORECAST TO CONTINUE IMPACTING PARTS OF
THE PACIFIC NORTHWEST TODAY BEFORE PRECIPITATION WEAKENS AND
BECOMES SCATTERED BY THE END OF THE WEEK. THE HIGHEST RAINFALL
AMOUNTS OVER THE NEXT FEW DAYS ARE EXPECTED TO OCCUR OVER WESTERN
OREGON AND NORTHERN CALIFORNIA, SLIGHTLY SOUTH OF WHERE THE
HEAVIEST RAIN HAS OCCURRED OVER THE LAST DAY. NEVERTHELESS, A FEW
INCHES OF RAIN ACROSS COASTAL REGIONS OF OREGON AND NORTHWEST
CALIFORNIA COULD LEAD INTO INSTANCES OF FLOODING. FLOOD WATCHES,
WARNINGS, AND ADVISORIES REMAIN IN EFFECT. SNOW LEVELS ARE
ANTICIPATED TO DROP BACK TO BELOW 4000 FEET BY THURSDAY AND LIMIT
THE SNOWMELT/RUNOFF POTENTIAL FROM THE HIGHER TERRAIN AS THE NEXT
WAVE OF MODERATE PRECIPITATION ENTERS THE REGION.
SNOW SHOWERS AND LIGHT SNOW POTENTIAL ALSO EXISTS ACROSS THE
APPALACHIANS, GREAT LAKES, AND NORTHEAST THROUGH THURSDAY AS COLD
AIR RUSHES IN FROM THE NORTHWEST DUE TO A DEVELOPING LOW PRESSURE
SYSTEM IN THE WESTERN ATLANTIC. THE MOST NOTEWORTHY ACCUMULATING
SNOW IS FORECAST TO OCCUR ALONG THE HIGHER TERRAIN OF THE CENTRAL
AND SOUTHERN APPALACHIANS THROUGH TONIGHT. WINTER WEATHER
ADVISORIES EXTEND FROM THE MOUNTAINOUS TERRAIN OF WESTERN NORTH
CAROLINA TO THE ALLEGHENY FRONT OF WEST VIRGINIA AND WESTERN
MARYLAND. HERE, 3 TO 6 INCHES OF SNOW IS POSSIBLE.
ELSEWHERE, THE CENTRAL U.S. CAN EXPECT WELL ABOVE TEMPERATURES AND
DRY CONDITIONS THROUGH FRIDAY AHEAD OF THE NEXT COLD FRONT AND
STORM SYSTEM TO ENTER THE GREAT PLAINS. HIGHS INTO THE 60S AS FAR
NORTH AS SOUTH DAKOTA AND 70S INTO SOUTHERN KANSAS ARE FORECAST,
WHICH EQUATES TO AROUND 20 TO 30 DEGREES ABOVE AVERAGE WHEN
COMPARED TO EARLY DECEMBER CLIMATOLOGY. THE WARMEST DAY WILL BE
THURSDAY, WHERE SEVERAL DAILY HIGH TEMPERATURE RECORDS COULD BE
BROKEN THROUGHOUT THE GREAT PLAINS AND UPPER MIDWEST. MEANWHILE,
AS THE AFOREMENTIONED COLD FRONT SWINGS THROUGH THE ROCKIES ON
THURSDAY AND APPROACHES THE PLAINS ON FRIDAY, UNSETTLED WEATHER
AND GUSTY WINDS ARE SET TO RETURN. MODERATE TO LOCALLY HEAVY SNOW
IS POSSIBLE ACROSS THE MOUNTAINOUS TERRAIN OF THE ROCKIES, AS WELL
AS INTO THE CENTRAL HIGH PLAINS ON FRIDAY. STRONG WESTERLY AND
DOWNSLOPING WINDS MAY ALSO PROVE TO BE HAZARDOUS ACROSS THE
NORTHERN AND CENTRAL HIGH PLAINS FOR THE END OF THE WEEK.
SNELL
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