436
FXUS01 KWBC 240801
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT WED JUL 24 2024
VALID 12Z WED JUL 24 2024 - 12Z FRI JUL 26 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 EXTEND ACROSS THE
SOUTHERN TIER STATES TO THE EAST COAST WITH HEAVY RAIN POSSIBLE
ALONG THE TEXAS COAST TODAY...
...A LOW PRESSURE WAVE WILL BRING A ROUND OF SHOWERS AND
THUNDERSTORMS ACROSS THE GREAT LAKES TODAY AND ACROSS NEW ENGLAND
ON THURSDAY...
...MONSOONAL THUNDERSTORMS CONTINUE ACROSS THE GREAT BASIN AND
INTO THE FOUR CORNERS REGION WITH THREATS OF LOCALIZED FLASH
FLOODING WHILE FIRE WEATHER DANGER EMERGES OVER THE INTERIOR
NORTHWEST...
A SLOW-TO-EVOLVE SUMMERTIME WEATHER PATTERN WILL CONTINUE ACROSS
MUCH OF THE U.S. MAINLAND WHILE 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. GRADUALLY BECOMES 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 TO NEAR 110 AT THE HOTTEST LOCATION 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 AS THE HEAT SPREADS
INTO THE NORTHERN HIGH PLAINS.
BY THURSDAY NIGHT INTO FRIDAY MORNING, THE COLD FRONT WILL MAKE
ITS WAY THROUGH THE NORTHERN ROCKIES INTO THE HIGH PLAINS WILL
COOLER AIR ARRIVING BUT WITH VERY LITTLE MOISTURE TO WORK WITH.
MEANWHILE, LIGHTNING ASSOCIATED WITH DRY THUNDERSTORMS TRIGGERED
BY THE PASSAGE OF THE COLD FRONT WILL RESULT IN CRITICAL FIRE
DANGER OVER THE INTERIOR NORTHWESTERN U.S. IN ADDITION, MONSOONAL
THUNDERSTORMS WILL CONTINUE ACROSS THE GREAT BASIN TODAY AND
BECOME MORE NUMEROUS OVER THE FOUR CORNERS REGION THURSDAY INTO
FRIDAY WITH THE THREAT OF LOCALIZED FLASH FLOODING OVER THE NEXT
COUPLE OF DAYS.
IN CONTRAST TO THE HEAT IN THE WEST, COOLER THAN NORMAL
TEMPERATURES WILL PREVAIL ACROSS THE MID-SECTION OF THE COUNTRY TO
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 SEVERE BUT THEY COULD RESULT
IN LOCALIZED FLOODING ISSUES FROM TIME TO TIME ACROSS THE SOUTHERN
TIER STATES AS WELL AS UP AND DOWN THE EAST COAST. A COASTAL
FRONT INTERACTING WITH A BROAD UPPER-LEVEL SOUTHWESTERLY FLOW
COULD SET OFF HEAVY RAIN AND THUNDERSTORMS NEAR THE TEXAS COAST
INTO SOUTHWESTERN LOUISIANA WHERE FLASH FLOODING IS POSSIBLE.
THEREFORE, A SLIGHT RISK OF FLASH FLOODING IS POSTED FROM
SOUTHEAST TEXAS INTO PORTIONS OF THE LOWER MISSISSIPPI VALLEY
WHILE ANOTHER IS IN EFFECT FROM THE INTERIOR PORTIONS OF THE
SOUTHEAST INTO THE MID-ATLANTIC FARTHER UP ALONG THE STATIONARY
FRONT THROUGH THE NEXT COUPLE OF DAYS.
FARTHER NORTH, A LOW PRESSURE WAVE DEVELOPING ALONG A COLD FRONT
DIPPING INTO THE NORTHERN TIER STATES WILL BRING ADDITIONAL
THUNDERSTORMS ACROSS THE GREAT LAKES TODAY. BY THURSDAY, THE
GREAT LAKES SHOULD CLEAR OUT FROM THE RAIN BUT NORTHERN NEW
ENGLAND WILL SEE AN INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS
AS THE LOW PRESSURE WAVE APPROACHES FROM THE WEST.
KONG
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