834
FXUS01 KWBC 220801
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT SUN OCT 22 2023
VALID 12Z SUN OCT 22 2023 - 12Z TUE OCT 24 2023
...COOL SUNDAY FOR THE NORTHEAST WITH A FREEZE POSSIBLE IN THE
UPPER OHIO VALLEY MONDAY MORNING...
...MUCH ABOVE AVERAGE HIGH TEMPERATURES CONTINUE FOR MUCH OF THE
CENTRAL AND WESTERN U.S...
...FRONTAL SYSTEM BRINGS PRECIPITATION CHANCES INLAND FROM THE
WEST COAST TO THE NORTHERN ROCKIES/PLAINS...
SOME LINGERING RAIN SHOWERS AND BREEZY WINDS ARE EXPECTED SUNDAY
IN NEW ENGLAND AS A LOW PRESSURE SYSTEM DEPARTS NORTHEASTWARD INTO
CANADA. FORECAST HIGH TEMPERATURES BROADLY FROM THE GREAT LAKES
INTO THE NORTHEAST WILL REMAIN MUCH BELOW AVERAGE FOLLOWING A
FRONTAL PASSAGE, WITH 40S AND 50S FOR THE INTERIOR AND 60S CLOSER
TO THE COAST. FROST AND FREEZE RELATED ADVISORIES ARE IN PLACE FOR
PORTIONS OF THE UPPER OHIO VALLEY MONDAY MORNING AS LOW
TEMPERATURES DROP INTO THE LOW TO MID-30S. HIGH TEMPERATURES
SHOULD WARM A BIT ON MONDAY AS CONDITIONS MODERATE.
BROAD UPPER-LEVEL RIDGING OVER THE CENTRAL-WESTERN U.S. WILL
REMAIN IN PLACE ON SUNDAY WITH FORECAST HIGHS ONCE AGAIN RUNNING
10-20 DEGREES ABOVE AVERAGE. HIGHS WILL RANGE IN THE 60S AND 70S
FROM THE GREAT BASIN INTO THE ROCKIES AND NORTHERN/CENTRAL PLAINS,
THE 80S FOR THE LOWER MISSISSIPPI VALLEY AND SOUTHERN PLAINS, AND
THE 90S FOR THE DESERT SOUTHWEST. THE RIDGE WILL SHIFT A BIT
EASTWARD ON MONDAY, ALLOWING FOR SOME COOLER TEMPERATURES IN THE
WEST AS A FRONTAL SYSTEM APPROACHES WHILE HIGHS SOAR INTO THE
UPPER 70S AND 80S FROM THE CENTRAL PLAINS INTO THE MIDDLE
MISSISSIPPI VALLEY. HIGHS WILL BE CLOSER TO AVERAGE FURTHER INTO
THE SOUTHEAST AND FLORIDA, WITH 70S AND SOME 80S FORECAST.
AN UPPER-LEVEL TROUGH WILL HELP TO PUSH A QUASI-STATIONARY FRONTAL
SYSTEM LINGERING IN THE NORTHWEST SOUTH AND EASTWARD ACROSS THE
REGION, WITH INCOMING PACIFIC MOISTURE HELPING TO SPREAD
PRECIPITATION CHANCES INLAND. LIGHT TO MODERATE SHOWERS AND
THUNDERSTORMS ARE FORECAST FROM NORTHERN CALIFORNIA INTO THE
NORTHERN GREAT BASIN/ROCKIES ON SUNDAY, SHIFTING TOWARDS THE
NORTHERN PLAINS BY MONDAY. SOME SNOW MAY MIX IN FOR HIGHER
MOUNTAIN ELEVATIONS. MORE POTENT SNOW CHANCES SHOULD BEGIN TO
ARRIVE BY EARLY TUESDAY MORNING IN THE NORTHWEST AND THE NORTHERN
ROCKIES AS ANOTHER SYSTEM DROPS SOUTHWARD FROM CANADA. HIGHS
SUNDAY WILL BE BELOW AVERAGE FOR MUCH OF CALIFORNIA, ESPECIALLY
NORTHERN PORTIONS WHERE THE RAIN IS EXPECTED, WITH MAINLY 60S
FORECAST. NOTED ABOVE AVERAGE HIGHS FOR MUCH OF THE INTERIOR WEST
SUNDAY WILL FALL CLOSER TO AVERAGE MONDAY FOLLOWING THE FRONTAL
PASSAGE, WITH 50S AND 60S EXPECTED. AS THE FRONTAL SYSTEM
CONTINUES EAST, INCREASING MOISTURE ASSOCIATED WITH TROPICAL STORM
NORMA CURRENTLY IN THE PACIFIC IS FORECAST TO BRING SHOWERS AND
THUNDERSTORMS TO THE SOUTHERN PLAINS OVERNIGHT MONDAY, WITH SOME
LOCALLY HEAVY RAINFALL POSSIBLE.
PUTNAM
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