486
FXUS01 KWBC 291947
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
346 PM EDT FRI SEP 29 2023
VALID 00Z SAT SEP 30 2023 - 00Z MON OCT 02 2023
...ADDITIONAL HEAVY RAIN POSSIBLE ACROSS PARTS OF THE NORTHEAST
TONIGHT, FOLLOWED BY DRIER CONDITIONS THIS WEEKEND...
...WIDESPREAD PRECIPITATION AND WELL BELOW-NORMAL TEMPERATURES
EXPECTED ACROSS THE WESTERN U.S....
...WELL ABOVE-NORMAL TO RECORD-BREAKING HEAT FORECAST FOR PARTS
THE CENTRAL U.S....
....LOCALLY HEAVY RAINFALL WITH ISOLATED FLOODING POSSIBLE ACROSS
THE SOUTHERN HIGH PLAINS...
A SLOW-MOVING COASTAL LOW CENTERED EAST OF THE MID ATLANTIC STATES
WILL CONTINUE TO SUPPORT LOCALIZED AREAS OF HEAVY RAIN INTO THE
OVERNIGHT ACROSS PORTIONS OF THE NORTHEAST. THIS INCLUDES THE NEW
YORK CITY METRO INTO THE LOWER HUDSON VALLEY AND SOUTHWESTERN
CONNECTICUT, WHERE SEVERAL INCHES OF RAIN AND SIGNIFICANT FLOODING
HAVE ALREADY OCCURRED. CONDITIONS ARE EXPECTED TO IMPROVE AS THE
LOW BEGINS TO SLIDE FARTHER EAST ON SATURDAY. THEN HIGH PRESSURE
AND DRY CONDITIONS CAN BE EXPECTED ACROSS MUCH OF THE NORTHEAST BY
LATE SATURDAY AND CONTINUING THROUGH SUNDAY.
WIDESPREAD PRECIPITATION AND COOLER TEMPERATURES WILL ADVANCE WITH
A FRONTAL SYSTEM ACROSS THE WESTERN U.S. THIS WEEKEND. SHOWERS
AND STORMS, INCLUDING HIGH ELEVATION SNOW, ARE EXPECTED TO SPREAD
SOUTH AND EAST FROM THE NORTHWEST INTO THE NORTHERN ROCKIES, GREAT
BASIN, AND CALIFORNIA BY EARLY SATURDAY, BEFORE EXTENDING INTO THE
NORTHERN PLAINS AND CENTRAL ROCKIES BY EARLY SUNDAY. TEMPERATURES
FOR MOST AREAS WEST OF THE ROCKIES ARE FORECAST TO BE WELL BELOW
NORMAL THROUGH THE WEEKEND, WITH RECORD COOL TEMPERATURES EXPECTED
ACROSS PORTIONS OF CENTRAL AND SOUTHERN CALIFORNIA.
IN STARK CONTRAST, TEMPERATURES WILL BE WELL ABOVE NORMAL ACROSS
MUCH OF THE CENTRAL U.S. RECORD TEMPERATURES ARE EXPECTED ACROSS
PORTIONS OF THE CENTRAL PLAINS INTO THE MID MISSISSIPPI VALLEY ON
SATURDAY, WHERE DAYTIME HIGHS ARE FORECAST TO CLIMB AS MUCH AS 20
DEGREES ABOVE NORMAL IN SOME LOCATIONS. THE CORE OF THE ANOMALOUS
HEAT IS THEN EXPECTED TO BUILD FARTHER NORTH, WITH RECORD HIGHS
FORECAST FOR PARTS OF THE UPPER MIDWEST ON SUNDAY. ABOVE-NORMAL
TO RECORD-BREAKING HEAT IS EXPECTED FOR PORTIONS OF THE SOUTHERN
PLAINS INTO THE LOWER MISSISSIPPI VALLEY BOTH DAYS AS WELL.
OVER THE SOUTHERN HIGH PLAINS, SOUTHERLY WINDS WILL BRING AN
INCREASE IN MOISTURE AND A CHANCE FOR SHOWERS AND THUNDERSTORMS
THROUGH THE WEEKEND. SOME OF THESE MAY PRODUCE LOCALLY HEAVY
RAINFALL AMOUNTS, RESULTING IN EXCESSIVE RUNOFF AND FLASH FLOODING.
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