056
FXUS01 KWBC 211950
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
349 PM EDT SAT OCT 21 2023
VALID 00Z SUN OCT 22 2023 - 00Z TUE OCT 24 2023
...RAIN FROM THE GREAT LAKES TO THE NORTHEAST AND OVER THE
NORTHWEST...
...TEMPERATURES WILL BE 15 TO 20 DEGREES ABOVE AVERAGE OVER THE
PARTS OF THE NORTHERN HIGH PLAINS/GREAT BASIN INTO THE
MIDDLE/LOWER MISSISSIPPI VALLEY...
AN UPPER-LEVEL LOW OVER MAINE WILL SLOWLY MOVE INTO SOUTHEASTERN
CANADA BY SUNDAY AFTERNOON, WHILE ADDITIONAL UPPER-LEVEL ENERGY
OVER THE GREAT LAKES MOVES OFF THE NORTHERN MID-ATLANTIC COAST BY
LATE SUNDAY NIGHT. THE UPPER-LEVEL ENERGY MOVING AROUND THE
UPPER-LEVEL LOW WILL PRODUCE SCATTERED RAIN OVER PARTS OF THE
GREAT LAKES INTO THE NORTHEAST THROUGH MONDAY MORNING. IN
ADDITION, LIGHT, WET SNOW WILL DEVELOP OVER THE HIGHEST ELEVATIONS
OF NEW YORK STATE.
MEANWHILE, UPPER-LEVEL TROUGHING AND A WEAK BOUNDARY OVER THE WEST
WILL AID IN CREATING LIGHT RAIN OVER PARTS OF THE PACIFIC
NORTHWEST AND NORTHERN/CENTRAL CALIFORNIA OVERNIGHT SATURDAY INTO
SUNDAY. THE RAIN ENDS OVER CALIFORNIA BY MONDAY MORNING. LIGHT
RAIN DEVELOPS OVER PARTS OF THE NORTHERN INTERMOUNTAIN REGION AS
THE UPPER-LEVEL TROUGH MOVES FARTHER INLAND. MOREOVER, UPPER-LEVEL
ENERGY OVER THE NORTHERN INTERMOUNTAIN REGION WILL MOVE TO THE
GREAT LAKES BY MONDAY. THE ENERGY WILL TRIGGER SCATTERED RAIN
SHOWERS OVER PARTS OF THE NORTHERN/CENTRAL PLAINS ON SUNDAY THAT
MOVE INTO THE UPPER GREAT LAKES/MIDDLE MISSISSIPPI VALLEY BY
MONDAY.
FURTHER, UPPER-LEVEL RIDGING EXTENDING FROM THE RIO GRANDE VALLEY
TO THE NORTHERN INTERMOUNTAIN REGION WILL SLOWLY CREEP EASTWARD
INTO THE MIDDLE/LOWER MISSISSIPPI VALLEY BY SUNDAY. THE
UPPER-LEVEL RIDGING WILL ALLOW TEMPERATURES TO BE 15 TO 20 DEGREES
ABOVE AVERAGE OVER THE NORTHERN HIGH PLAINS/GREAT BASIN INTO THE
MIDDLE/LOWER MISSISSIPPI VALLEY.
OVERNIGHT SUNDAY, UPPER-LEVEL ENERGY MOVING OVER TEXAS AND
MOISTURE MOVING NORTHWARD OVER THE SOUTHERN PLAINS WILL AID IN
CREATING SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHERN
PLAINS LATE SUNDAY INTO MONDAY.
ZIEGENFELDER
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