229
FXUS01 KWBC 050740
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
340 AM EDT WED JUN 05 2024
VALID 12Z WED JUN 05 2024 - 12Z FRI JUN 07 2024
...EXCESSIVE HEAT WARNINGS IN EFFECT ACROSS PARTS OF CALIFORNIA'S
CENTRAL VALLEY REGION AS WELL AS THE DESERT SOUTHWEST; EXTREME
HEAT RISK CONTINUES ACROSS SOUTH TEXAS...
...THUNDERSTORMS AND HEAVY TO EXCESSIVE RAINFALL POSSIBLE FROM
SOUTHERN PLAINS TO NORTHEAST THROUGH THURSDAY...
A VERY PRONOUNCED RIDGE WILL BUILD ACROSS THE WESTERN U.S. OVER
THE NEXT FEW DAYS WHILE UPPER-LEVEL LOWS INFLUENCE THE PATTERN
ACROSS THE LOWER 48 FROM THEIR RESPECTIVE STATIONS OFF THE BAJA
AND NOVA SCOTIA COASTS. THE UPPER RIDGE WILL SUPPORT A HEAT WAVE
WHICH WILL EXPAND ACROSS THE REGION. HIGH TEMPERATURES IN THE 90S
AND 100S WILL BE 20-30 DEGREES ABOVE AVERAGE FOR THIS TIME OF
YEAR, WHILE LOW TEMPERATURES IN THE UPPER 60S AND 70S WILL OFFER
LITTLE RESPITE AT NIGHT. WIDESPREAD HIGH AND LOW TEMPERATURE
RECORDS MAY BE TIED OR BROKEN THROUGH FRIDAY. THERE ARE EXCESSIVE
HEAT WARNINGS IN EFFECT FOR CALIFORNIA'S CENTRAL VALLEY AS WELL AS
PORTIONS OF THE DESERT SOUTHWEST INCLUDING SOUTHEASTERN
CALIFORNIA, SOUTHERN NEVADA AND WESTERN/SOUTHERN ARIZONA. MILD
NIGHT TIME TEMPERATURES WILL CONTINUE TO PLAGUE SOUTHERN TEXAS
THROUGH THE END OF THE WEEK. THESE EXTREMELY HOT CONDITIONS WILL
AFFECT ANYONE WITHOUT EFFECTIVE COOLING AND/OR ADEQUATE HYDRATION.
A PAIR OF LOW PRESSURE SYSTEMS TRACKING ACROSS THE EASTERN HALF OF
THE COUNTRY WILL TRIGGER SCATTERED TO ISOLATED SHOWERS AND
THUNDERSTORMS ACROSS MUCH OF THE REGION TODAY BEFORE SHIFTING INTO
JUST THE EAST COAST ON THURSDAY. DEEP LAYER MOISTURE PAIRED WITH
INSTABILITY WILL SUPPORT LOCALLY HEAVY RAINFALL OVER PARTS OF THE
OHIO VALLEY, CENTRAL APPALACHIANS AND MID-ATLANTIC WHERE A SLIGHT
RISK (AT LEAST 15%) OF EXCESSIVE RAINFALL LEADING TO FLASH
FLOODING IS IN EFFECT FOR TODAY. THE THREAT FOR EXCESSIVE RAINFALL
SHIFTS INTO PARTS OF THE INTERIOR NORTHEAST AND NEW ENGLAND ON
THURSDAY, WHERE ANOTHER SLIGHT RISK OF EXCESSIVE RAINFALL IS IN
EFFECT. A PATTERN CHANGE WILL ENSUE ACROSS THE EASTERN U.S. ON
THURSDAY, IN WHICH A DIGGING TROUGH WILL USHER IN COOLER AIR
TEMPERATURES AND CONTINUE THROUGH THE WEEKEND.
KEBEDE
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