003
FXUS01 KWBC 310806
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT WED MAY 31 2023
VALID 12Z WED MAY 31 2023 - 12Z FRI JUN 02 2023
...WIDESPREAD SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE ACROSS
LARGE PORTIONS OF THE CENTRAL U.S., THE NORTHERN ROCKIES AND
NORTHERN GREAT BASIN...
...WATCHING THE POTENTIAL FOR LOW PRESSURE TO DEVELOP IN THE
EASTERN GULF AND BRING INCREASING CHANCE OF THUNDERSTORMS ACROSS
SOUTHERN FLORIDA NEXT FEW DAYS...
...MUCH ABOVE AVERAGE TEMPERATURES ALONG THE NORTHERN TIER OF THE
NATION BUT COOLER THAN NORMAL ACROSS THE SOUTHERN TIER AND ALONG
THE WEST AND EAST COASTS...
A BLOCKY WEATHER PATTERN CONTINUES ACROSS THE MAINLAND U.S. AS WE
END THE MONTH OF MAY AND HEAD INTO JUNE. THIS PATTERN CONTINUES
TO PRESENT ITSELF WITH UPPER TROUGHING ACROSS THE WESTERN U.S.
LEADING TO WIDESPREAD SCATTERED SHOWERS AND THUNDERSTORMS OVER
MUCH OF THE CENTRAL U.S., THE NORTHERN ROCKIES AND NORTHERN GREAT
BASIN/INTERMOUNTAIN REGION. MEANWHILE, A TROUGH MOVING INTO THE
GULF OF MEXICO AND ANOTHER TROUGH/CLOSED LOW OFF THE MID-ATLANTIC
COAST WILL REMAIN BLOCKED BY AN UPPER-LEVEL CLOSED HIGH OVER
NORTHEASTERN U.S. WHICH IS FORECAST TO EXPAND TO THE WEST INTO THE
GREAT LAKES OVER THE NEXT COUPLE OF DAYS. THIS PATTERN IS
MANIFESTED WITH A NORTH-SOUTH TEMPERATURE
REVERSAL AT THE SURFACE, WITH MUCH ABOVE NORMAL TEMPERATURES
ACROSS THE NORTHERN TIER STATES IN CONTRAST WITH COOLER THAN
NORMAL CONDITIONS ACROSS THE SOUTHERN TIER AND ALONG THE WEST AND
EAST COASTS. BY FRIDAY, THE NORTHEAST IS FORECAST TO BE VERY WARM
WITH HIGH TEMPERATURES CHALLENGING DAILY RECORDS UNDER THE
EXPANDING UPPER HIGH.
SCATTERED SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE MOST ACTIVE
DURING THE AFTERNOON INTO THE EVENING HOURS TODAY AND INTO
THURSDAY FROM NORTHERN CALIFORNIA THROUGH THE NORTHERN ROCKIES
WHERE A MARGINAL RISK OF FLASH FLOODING IS ANTICIPATED. LATER ON
THURSDAY INTO THURSDAY NIGHT, CHANCE OF HEAVY RAIN/SHOWERS ARE
EXPECTED TO BE MORE FOCUSED ACROSS THE NORTHERN HIGH PLAINS WITH A
SLIGHT RISK OF FLASH FLOODING. MEANWHILE, STRONG TO SEVERE
THUNDERSTORMS WILL BE MOST LIKELY ACROSS THE CENTRAL TO SOUTHERN
HIGH PLAINS THROUGH THE NEXT COUPLE OF DAYS AS UPPER-LEVEL
IMPULSES FROM THE WESTERN U.S. MEAN TROUGH EJECT INTO THE GREAT
PLAINS.
ACROSS THE MID-ATLANTIC, A LINGERING UPPER LOW WITH A STATIONARY
FRONT AT THE SURFACE WILL CONTINUE TO PUSH COOLER AIR DOWN FROM
NEW ENGLAND TO THE EAST COAST AND APPALACHIANS. THERE REMAINS THE
CHANCE FOR SOME LIGHT SCATTERED SHOWERS AND THUNDERSTORMS TO SPIN
BACK ONSHORE INTO THE MID-ATLANTIC DURING THE NEXT COUPLE OF DAYS.
TO THE SOUTH, AN UPPER-LEVEL TROUGH SETTLING OVER THE GULF OF
MEXICO IS FORECAST TO SPAWN A NEW LOW-PRESSURE SYSTEM AT THE
SURFACE. THIS SYSTEM IS CURRENTLY BEING MONITORED BY THE NATIONAL
HURRICANE CENTER. THE EXACT TRACK OF THIS SYSTEM REMAINS
UNCERTAIN, BUT SHOWERS AND THUNDERSTORMS AHEAD OF THE SYSTEM ARE
EXPECTED TO BECOME INCREASINGLY ACTIVE OVER THE FLORIDA PENINSULA
THROUGH THE NEXT FEW DAYS.
KONG
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