171
FXUS01 KWBC 142004
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
403 PM EDT SUN MAY 14 2023
VALID 00Z MON MAY 15 2023 - 00Z WED MAY 17 2023
...ABOVE-NORMAL TEMPERATURES TO SPREAD FROM THE WESTERN INTO THE
CENTRAL U.S. EARLY THIS WEEK...
...ADDITIONAL HEAVY RAIN AND FLOODING POSSIBLE FOR PARTS OF THE
SOUTHERN PLAINS AND MID MISSISSIPPI VALLEY INTO MONDAY...
...HEAVY RAINFALL THREAT MOVING EAST INTO THE LOWER OHIO AND
TENNESSEE VALLEYS ON TUESDAY...
ABOVE-NORMAL TEMPERATURES ARE FORECAST TO PERSIST ALONG THE WEST
COAST THROUGH THE PERIOD WHILE EXTENDING ACROSS THE INTERMOUNTAIN
WEST AND INTO THE ROCKIES EARLY THIS WEEK. FOR MANY LOCATIONS,
DAYTIME TEMPERATURES WILL REACH 10-20 DEGREES ABOVE NORMAL ON BOTH
MONDAY AND TUESDAY. WHILE A WEAK AREA OF LOW PRESSURE IN THE
UPPER LEVELS OF THE ATMOSPHERE MAY PROVIDE SOME RELIEF AND AN
INCREASING CHANCE FOR SHOWERS AND THUNDERSTORMS, HIGH TEMPERATURES
MAY ONCE AGAIN EXCEED THEIR DAILY RECORDS FOR PARTS OF THE PACIFIC
NORTHWEST, INCLUDING THE SEATTLE AND PORTLAND METRO REGIONS, ON
MONDAY.
ENERGY IN THE UPPER LEVELS OF THE ATMOSPHERE INTERACTING WITH A
MOIST AIRMASS WILL CONTINUE TO PRODUCE AREAS OF SHOWERS AND
THUNDERSTORMS THROUGH THIS EVENING INTO MONDAY ACROSS THE CENTRAL
AND SOUTHERN PLAINS AND MID MISSISSIPPI VALLEY. SOME OF THESE
STORMS MAY BECOME STRONG TO SEVERE, PRODUCING LARGE HAIL DAMAGING
WINDS, AS WELL AS HEAVY TO EXCESSIVE RAINFALL.
HIGH PRESSURE TO THE NORTH WILL SUPPORT ABOVE-NORMAL TEMPERATURES
ACROSS THE NORTHERN PLAINS AND UPPER MIDWEST ON MONDAY, THAT WILL
EXTEND FARTHER SOUTH ON TUESDAY.
BY EARLY TUESDAY, AN AREA OF LOW PRESSURE IS EXPECTED TO
STRENGTHEN AND MOVE EAST THROUGH THE TENNESSEE AND LOWER OHIO
VALLEY REGIONS. WHILE DRIER CONDITIONS ARE EXPECTED FOR MUCH OF
THE CENTRAL PLAINS AND MID MISSISSIPPI VALLEY, THE THREAT FOR
HEAVY RAIN IS LIKELY TO INCREASE ACROSS PARTS OF THE TENNESSEE AND
LOWER OHIO VALLEYS INTO THE SOUTHERN APPALACHIANS ON TUESDAY.
IT WILL BE ANOTHER COLD MORNING ON MONDAY ACROSS THE GREAT LAKES
AND NORTHEAST, WITH FROST ADVISORIES IN EFFECT FOR PARTS OF
NORTHERN LOWER MICHIGAN, UPSTATE NEW YORK, NORTHERN PENNSYLVANIA,
VERMONT, AND NEW HAMPSHIRE. A FREEZE WARNING IS EFFECT FOR PARTS
OF NORTHERN LOWER MICHIGAN AS WELL. TEMPERATURES ARE EXPECTED TO
REBOUND BEFORE A STRONG COLD FRONT DROPS INTO THE REGION ON
TUESDAY.
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