550
FXUS01 KWBC 261857
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
256 PM EDT TUE SEP 26 2023
VALID 00Z WED SEP 27 2023 - 00Z FRI SEP 29 2023
...BELOW AVERAGE TEMPERATURES TO PERSIST ACROSS THE PACIFIC
NORTHWEST INTO THE NORTHERN ROCKIES AND ACROSS THE MID-ATLANTIC
AND SOUTHEAST...
...ABOVE AVERAGE TEMPERATURES EXPECTED ACROSS FROM THE SOUTHWEST,
THROUGH THE ROCKIES, PLAINS, MISSISSIPPI VALLEY, UPPER LAKES AND
NORTHERN NEW ENGLAND...
...WET WEATHER TO CONTINUE ACROSS MUCH OF FLORIDA INTO THE
COASTAL SOUTHEAST, ACROSS THE MID-WEST INTO THE OHIO VALLEY AND
ACROSS THE PACIFIC NORTHWEST...
THE FIRST FULL WEEK OF FALL WILL CONTINUE TO SHOW BIG TEMPERATURE
DIFFERENCES ACROSS THE NATION WITH GENERALLY BELOW AVERAGE
TEMPERATURES ALONG PORTIONS OF THE EAST COAST AND PACIFIC
NORTHWEST AND ABOVE AVERAGE TEMPERATURES IN BETWEEN. A SERIES OF
COLD FRONTS HAVE BEEN MOVING OFF THE NORTHEAST PACIFIC AND INTO
THE NORTHWESTERN U.S, PROVIDING MUCH NEEDED RAINS TO REGIONS
CURRENTLY IN EXTREME TO EXCEPTIONAL DROUGHT CONDITIONS AND ALSO
RESULTING IN TEMPERATURES WELL BELOW AVERAGE. HIGH TEMPERATURES
OVER THE NEXT FEW DAYS ARE FORECAST TO REMAIN 10 TO 15 DEGREES
BELOW AVERAGE FROM NORTHERN CALIFORNIA, ACROSS THE PACIFIC
NORTHWEST AND INTO THE NORTHERN ROCKIES.
BELOW AVERAGE TEMPERATURES ALSO EXPECTED TO PERSIST INTO MID WEEK
ALONG PORTIONS OF THE EAST COAST WHERE LOW LEVEL CLOUDS REMAIN
STUCK FROM A COMBINATION OF COOL SURFACE HIGH PRESSURE NOSING
SOUTHWARD FROM SOUTHEAST CANADA AND A NEARLY STATIONARY SURFACE
LOW SPINNING OFF THE MID-ATLANTIC COAST.
IN BETWEEN THE TWO REGIONS OF BELOW AVERAGE TEMPERATURES, ABOVE
AVERAGE WARMTH WILL STRETCH FROM THE SOUTHWEST, THROUGH THE
ROCKIES, PLAINS, MISSISSIPPI VALLEY, UPPER GREAT LAKES AND INTO
NORTHERN NEW ENGLAND. WHILE NO RECORD HIGHS ARE ANTICIPATED
ACROSS THESE REGIONS, TEMPERATURES WILL BE MORE SUMMER LIKE THAN
FALL LIKE. THESE AREAS WILL ALSO REMAIN DRY, BRINGING NO RELIEF
TO THE EXTREME TO EXCEPTIONAL DROUGHT CONDITIONS THAT STRETCH
ACROSS LARGE PORTIONS OF THE SOUTHERN TO CENTRAL PLAINS, UPPER AND
LOWER MISSISSIPPI VALLEY AND PORTIONS OF THE SOUTHWEST.
IN CONTRAST, WET WEATHER WILL CONTINUE OVER THE NEXT FEW DAYS
ACROSS MUCH OF FLORIDA INTO THE COASTAL SOUTHEAST WHERE ABOVE
AVERAGE MOISTURE VALUES WILL CONTINUE TO BE TRANSPORTED
NORTHEASTWARD ACROSS THESE REGIONS ON THE EASTERN SIDE OF A MID TO
UPPER LEVEL LOW ACROSS THE GULF OF MEXICO. A SLOW MOVING MID TO
UPPER LEVEL LOW ACROSS THE GREAT LAKES INTO THE OHIO VALLEY REGION
WILL ALSO KEEP CONDITIONS WET ACROSS THESE REGIONS OVER THE NEXT
FEW DAYS. IN BOTH REGIONS OF WET WEATHER, AREAS OF HEAVY RAINS
MAY PRODUCE ISOLATED FLASH FLOODING, ESPECIALLY IN URBANIZED
REGIONS.
ORAVEC
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