378
FXUS01 KWBC 300737
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
337 AM EDT SAT SEP 30 2023
VALID 12Z SAT SEP 30 2023 - 12Z MON OCT 02 2023
...MODERATE SNOW OVER PARTS OF THE SIERRA NEVADA MOUNTAINS ABOVE
9000FT ON SATURDAY...
...TEMPERATURES WILL BE 15 TO 20 DEGREES ABOVE NORMAL OVER PARTS
OF THE MIDDLE MISSISSIPPI VALLEY AND CENTRAL PLAINS...
...TEMPERATURES WILL BE 10 TO 20 DEGREES BELOW AVERAGE OVER PARTS
OF CALIFORNIA, THE GREAT BASIN, AND THE PACIFIC NORTHWEST ON
SATURDAY...
ON SATURDAY, LOW-PRESSURE SOUTHEAST OF SOUTHERN NEW ENGLAND WILL
SLOWLY MOVE EASTWARD OUT OVER THE WESTERN ATLANTIC BY SUNDAY. THE
LOW WILL STREAM MOISTURE AIR OFF THE ATLANTIC, PRODUCING RAIN OVER
PARTS OF THE NORTHERN MID-ATLANTIC AND SOUTHERN NEW ENGLAND
THROUGH SATURDAY EVENING.
MEANWHILE, TROPICAL MOISTURE OVER FLORIDA, UPPER-LEVEL ENERGY, AND
A WEAK FRONT WILL CREATE SHOWERS AND THUNDERSTORMS OVER PARTS OF
FLORIDA THROUGH MONDAY MORNING. ADDITIONALLY, A WEAK FRONT OVER
PARTS OF THE UPPER MIDWEST WILL SLOWLY DISSIPATE BY SATURDAY
NIGHT. THE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER
PARTS OF THE UPPER MIDWEST THROUGH SUNDAY AFTERNOON.
FURTHERMORE, UPPER-LEVEL RIDGING OVER THE MIDDLE/LOWER MISSISSIPPI
VALLEY AND THE OHIO/TENNESSEE VALLEYS WILL AID IN ALLOWING
TEMPERATURES TO BE 15 TO 20 DEGREES ABOVE NORMAL OVER PARTS OF THE
MIDDLE MISSISSIPPI VALLEY AND CENTRAL PLAINS ON SATURDAY.
MOREOVER, A DEEP UPPER-LEVEL TROUGH OVER CALIFORNIA AND THE
PACIFIC NORTHWEST WILL DEVELOP AN UPPER-LEVEL LOW OVER THE GREAT
BASIN BY SUNDAY AND BEGIN TO WEAKEN ON MONDAY. RAIN WILL DEVELOP
OVER PARTS OF THE PACIFIC NORTHWEST INTO THE NORTHERN
INTERMOUNTAIN REGION AND CALIFORNIA/THE GREAT BASIN ON SATURDAY.
AS THE UPPER-LEVEL TROUGH DEEPENS, SNOW LEVELS WILL DROP OVER
PARTS OF THE SIERRA NEVADA MOUNTAINS, PRODUCING MODERATE SNOW AT
ELEVATIONS ABOVE 9000FT, WITH RAIN AT LOWER ELEVATIONS. THE
PRECIPITATION WILL CONTINUE THROUGH SUNDAY EVENING. MOREOVER, THE
UPPER-LEVEL TROUGHING WILL ALLOW TEMPERATURES TO BE 10 TO 20
DEGREES BELOW AVERAGE OVER PARTS OF CALIFORNIA, THE GREAT BASIN,
AND THE PACIFIC NORTHWEST ON SATURDAY.
AS THE DEEP TROUGH DEVELOPS OVER THE COUNTRY S WESTERN HALF,
MOISTURE FROM THE GULF OF MEXICO WILL MOVE NORTHWESTWARD OVER THE
SOUTHERN HIGH PLAINS. THE MOISTURE AND UPPER-LEVEL ENERGY WILL AID
IN CREATING SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHERN
ROCKIES/SOUTHERN HIGH PLAINS ON SATURDAY AND BY SATURDAY NIGHT,
SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE SOUTHERN
HIGH PLAINS INTO PARTS OF THE CENTRAL HIGH PLAINS. ADDITIONALLY,
MOISTURE FLOWING OFF THE WESTERN GULF OF MEXICO WILL CREATE
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE WESTERN GULF COAST
THROUGH MONDAY.
ZIEGENFELDER
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