263
FXUS01 KWBC 230816
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT TUE JUL 23 2024
VALID 12Z TUE JUL 23 2024 - 12Z THU JUL 25 2024
...MAJOR TO LOCALLY EXTREME HEAT RISK WILL EXPAND ACROSS THE
NORTHERN HIGH PLAINS AS HEAT GRADUALLY BECOMES LESS INTENSE OVER
THE CENTRAL VALLEY OF CALIFORNIA AND THE GREAT BASIN...
...SCATTERED SHOWERS AND THUNDERSTORMS WILL AFFECT A LARGE SECTION
OF THE EASTERN HALF OF THE U.S. WITH HEAVY RAIN EMERGING NEAR THE
TEXAS COAST ON WEDNESDAY...
...MONSOONAL THUNDERSTORMS CONTINUE ACROSS THE GREAT BASIN AND
INTO THE FOUR CORNERS REGION WITH THREAT OF LOCALIZED FLASH
FLOODING...
A SLOW-TO-EVOLVE SUMMERTIME WEATHER PATTERN WILL CONTINUE ACROSS
MUCH OF THE U.S. MAINLAND AS A MORE PROGRESSIVE PACIFIC COLD FRONT
SWEEPS ACROSS THE NORTHWESTERN PART OF THE COUNTRY THROUGH THE
NEXT COUPLE OF DAYS. UNDER THIS WEATHER PATTERN, UNSETTLED
WEATHER AND RELATIVELY COOL TEMPERATURES FOR JULY WILL CONTINUE
ACROSS THE EASTERN HALF OF THE COUNTRY AS THE ONGOING HEAT WAVE
OVER THE WESTERN U.S. WILL GRADUALLY BECOME LESS INTENSE WITH THE
ARRIVAL OF THE PACIFIC COLD FRONT. THE STRONGER FORCING
ASSOCIATED WITH THIS FRONT WILL PUSH THE HEAT DOME EAST OF THE
GREAT BASIN, RESULTING IN THE EXPANSION OF MAJOR TO LOCALLY
EXTREME HEAT RISK ACROSS THE NORTHERN HIGH PLAINS THROUGH THE NEXT
COUPLE OF DAYS. HIGH TEMPERATURES ARE FORECAST TO REACH WELL UP
INTO THE 100S OVER THE NORTHERN HIGH PLAINS THROUGH THURSDAY WITH
LITTLE TO NO RAINFALL EXPECTED. MEANWHILE, THE HEAT WILL
GRADUALLY BECOME LESS INTENSE OVER THE CENTRAL VALLEY OF
CALIFORNIA AND THE GREAT BASIN WITH TIME. PLEASE CONTINUE TO
PRACTICE HEAT SAFETY IN THE WESTERN U.S. AND AS THE HEAT SPREADS
INTO THE NORTHERN HIGH PLAINS.
IN CONTRAST, COOLER THAN NORMAL TEMPERATURES WILL PREVAIL ACROSS
THE MID-SECTION OF THE COUNTRY AND INTO PORTIONS OF THE EASTERN
U.S. WHERE A STALLED FRONT WILL KEEP PLENTY OF CLOUDS ALONG WITH
SCATTERED THUNDERSTORMS. THESE THUNDERSTORMS ARE NOT EXPECTED TO
BE POTENT BUT THEY COULD RESULT IN LOCALIZED FLOODING ISSUES FROM
TIME TO TIME ACROSS THE SOUTHERN TIER STATES AND UP AND DOWN THE
EAST COAST. A SLIGHT RISK OF FLASH FLOODING IS ANTICIPATED FOR
AREAS JUST INLAND FROM THE WESTERN GULF STATES FOR TODAY FROM
TEXAS TO CENTRAL MISSISSIPPI. BY WEDNESDAY, A COASTAL FRONT COULD
SET OFF HEAVY RAIN AND THUNDERSTORMS NEAR THE TEXAS COAST INTO
SOUTHWESTERN LOUISIANA WHERE FLASH FLOODING IS POSSIBLE. FARTHER
NORTH, ANOTHER COLD FRONT FROM EASTERN CANADA DIPPING INTO THE
NORTHERN TIER STATES WILL BRING ADDITIONAL THUNDERSTORMS ACROSS
THE GREAT LAKES TO NEW ENGLAND THROUGH WEDNESDAY. BY THURSDAY
MORNING, THE GREAT LAKES SHOULD CLEAR OUT FROM THE RAIN BUT
NORTHERN NEW ENGLAND WILL SEE AN INCREASING CHANCE OF SHOWERS AND
THUNDERSTORMS AS A LOW PRESSURE WAVE APPROACHES FROM THE WEST.
MEANWHILE, MONSOONAL THUNDERSTORMS WILL CONTINUE ACROSS THE GREAT
BASIN AND THE FOUR CORNERS REGION WITH THE THREAT OF LOCALIZED
FLASH FLOODING FOR THE NEXT COUPLE OF DAYS.
KONG
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