974
FXUS01 KWBC 291911
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
310 PM EDT MON MAY 29 2023
VALID 00Z TUE MAY 30 2023 - 00Z THU JUN 01 2023
...WIDESPREAD SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED FOR
LARGE PORTIONS OF THE CENTRAL U.S. INTO THE NORTHERN ROCKIES AND
NORTHERN GREAT BASIN...
...SHOWERY CONDITIONS LIKELY ACROSS THE SOUTHERN MID-ATLANTIC
THROUGH TUESDAY AND DEVELOPING ACROSS PORTIONS OF FLORIDA
WEDNESDAY...
...MUCH ABOVE AVERAGE TEMPS EXPECTED ALONG THE NORTHERN TIER OF
THE NATION, WHILE COOLER THAN AVERAGE TEMPS ACCOMPANY THE SHOWERS
ACROSS THE SOUTHEAST PORTION OF THE NATION...
THE LARGE SCALE FLOW ACROSS THE LOWER 48 REMAINS FAIRLY BLOCKED
OVER THE NEXT FEW DAYS, CHARACTERIZED BY A MEAN TROF ACROSS THE
WESTERN HALF OF THE COUNTRY, ANOTHER TROF FROM THE SOUTHERN
MID-ATLANTIC INTO THE SOUTHEAST AND A CLOSED UPPER HIGH FROM THE
GREAT LAKES INTO THE NORTHEAST.
THE MEAN TROF PATTERN ACROSS THE WESTERN U.S. WILL SUPPORT
WIDESPREAD SCATTERED SHOWERS OVER THE NEXT TWO DAYS FROM NORTHERN
CALIFORNIA THROUGH THE NORTHERN GREAT BASIN, NORTHERN ROCKIES AND
ACROSS MUCH OF THE PLAINS STATES. ACROSS THESE REGIONS, ISOLATED
HEAVY RAINFALL AMOUNTS ARE POSSIBLE ALONG WITH ISOLATED INSTANCES
OF FLASH FLOODING.
ACROSS THE SOUTHERN MID-ATLANTIC, A SLOW MOVING UPPER LOW WILL
INCH ITS WAY OFFSHORE DURING TUESDAY. THIS SYSTEM WILL CONTINUE
TO PRODUCE SCATTERED SHOWERS ACROSS THE SOUTHERN MID-ATLANTIC ON
TUESDAY, BUT AS THE SYSTEM CONTINUES TO PUSH OFFSHORE, DRIER
CONDITIONS EXPECTED ON WEDNESDAY. IN THE WAKE OF THIS UPPER LOW
MOVING OFFSHORE, ANOTHER UPPER LOW IS EXPECTED TO FORM ACROSS THE
CENTRAL GULF OF MEXICO. SHOWER ACTIVITY WILL BECOME INCREASINGLY
LIKELY TO THE EAST OF THIS DEVELOPING UPPER LOW ON WEDNESDAY,
BRINGING INCREASING RAIN CHANCES FOR CENTRAL TO SOUTH FLORIDA.
THIS NEW UPPER LOW WILL BE SLOW MOVING THROUGH THE REMAINDER OF
THE WEEK AS IT MOVES ACROSS THE EASTERN GULF AND FLORIDA,
MAINTAINING A WET PATTERN FOR CENTRAL TO SOUTH FLORIDA INTO LATE
THIS WEEK.
A CLOSED UPPER HIGH WILL REMAIN PARKED ACROSS THE NORTHEASTERN
PORTION OF THE NATION FROM THE GREAT LAKES INTO NEW ENGLAND. DRY
CONDITIONS AND MUCH ABOVE AVERAGE TEMPERATURES WILL ACCOMPANY THIS
UPPER HIGH WITH HIGH TEMPERATURES 15 TO 20 DEGREES ABOVE AVERAGE
ACROSS MUCH OF THE NORTHERN TIER FROM THE NORTHER PLAINS, THROUGH
THE UPPER LAKES, NORTHERN NY STATE INTO NORTHERN NEW ENGLAND.
COOLER THAN AVERAGE TEMPERATURES OVER THE NEXT FEW DAYS WILL BE
ASSOCIATED WITH THE SHOWERY PATTERN ACROSS THE SOUTHEASTERN U.S.
AND ALONG THE WEST COAST INTO THE DESERT SOUTHWEST.
ORAVEC
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