356
FXUS01 KWBC 250639
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
138 AM EST MON NOV 25 2024
VALID 12Z MON NOV 25 2024 - 12Z WED NOV 27 2024
...HEAVY SNOW OVER PARTS OF THE SIERRA NEVADA MOUNTAINS, UPPER
GREAT LAKES AND CENTRAL ROCKIES...
...BELOW AVERAGE TEMPERATURES IN THE NORTHERN PLAINS; ABOVE
AVERAGE TEMPS IN THE SOUTHERN PLAINS/LOWER MISSISSIPPI VALLEY
TODAY...
AN UPPER-LEVEL TROUGH WILL SWOOP INTO THE WEST COAST FROM THE
NORTHEAST PACIFIC EARLY THIS WEEK. THIS TROUGH WILL DIRECT A VERY
ANOMALOUS SUBTROPICAL MOISTURE PLUME ALONG ITS BASE AT CENTRAL AND
SOUTHERN CALIFORNIA TODAY AND TUESDAY. A SURFACE LOW PRESSURE
SYSTEM WILL HELP FOCUS THE ANOMALOUS MOISTURE OVER COASTAL AREAS
AS WELL AS THE SIERRA NEVADA. PARTS OF THE SOUTHERN SIERRA BELOW
ABOUT 8000 FEET MAY EXPERIENCE INSTANCES OF FLASH FLOODING TODAY.
ROCK/MUD SLIDES AND GENERAL DEBRIS FLOW ARE SOME OF THE POSSIBLE
IMPACTS FROM EXCESSIVE RAINFALL IN MOUNTAINOUS AREAS. HEAVY SNOW
IS PROBABLE AT THE HIGHER ELEVATIONS OF THE SOUTHERN SIERRA, WHERE
3-4 FEET ARE FORECAST TO ACCUMULATE WITH ISOLATED HIGHER AMOUNTS
POSSIBLE BY WEDNESDAY MORNING. THE ANOMALOUS MOISTURE FEED IS ALSO
EXPECTED TO PENETRATE INTO THE INTERIOR OF THE WEST. PARTS OF THE
GREAT BASIN WILL EXPERIENCE SNOW SHOWERS WHILE HEAVY SNOW BLANKETS
THE INTERMOUNTAIN WEST AND COLORADO ROCKIES WITH 1-2' (ISOLATED
3') LIKELY OVER THE NEXT COUPLE OF DAYS.
ELSEWHERE, A PAIR OF LOW PRESSURE SYSTEMS MOVING THROUGH THE UPPER
MIDWEST/GREAT LAKES WILL GENERATE SEVERAL INCHES OF SNOW OVER THE
UPPER PENINSULA OF MICHIGAN, WHILE SNOW SHOWERS OCCUR ACROSS THE
GREATER UPPER MIDWEST AND LOWER GREAT LAKES. TEMPERATURES WILL
REMAIN ABOVE AVERAGE FOR ONE LAST DAY FROM THE SOUTHERN PLAINS
INTO THE MIDWEST BEFORE A STRONG COLD FRONT PUSHES THROUGH ON
TUESDAY. SOME RECORD HIGH TEMPERATURES (IN THE MID TO UPPER 80S)
MIGHT BE SET OVER SOUTH TEXAS TODAY. HIGHS TOPPING OUT IN THE
TEENS AND 20S WILL REPRESENT A NEGATIVE 20-30 DEGREE DEPARTURE
FROM NORMAL FOR PARTS OF THE NORTHERN PLAINS TODAY. MILD
CONDITIONS CONTINUE OVER MUCH OF THE EAST COAST THROUGH TUESDAY.
KEBEDE
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