367
FXUS01 KWBC 190809
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
407 AM EDT FRI JUL 19 2024
VALID 12Z FRI JUL 19 2024 - 12Z SUN JUL 21 2024
...A BREAK IN THE HEAT IS EXPECTED FOR MUCH OF THE EASTERN
TWO-THIRDS OF THE COUNTRY BUT TRIPLE-DIGIT HEAT WILL CONTINUE IN
THE WEST THROUGH THIS WEEKEND...
...SCATTERED THUNDERSTORMS WILL BE CONFINED ACROSS THE SOUTH AND
SOUTHEAST AS MONSOONAL THUNDERSTORMS LINGER ACROSS THE FOUR
CORNERS REGION...
...STRONG TO SEVERE THUNDERSTORMS POSSIBLE TODAY OVER THE
NORTH-CENTRAL PLAINS...
A COOL AIR MASS ARRIVING FROM CENTRAL CANADA IS BRINGING A WELCOME
RELIEF TO THE HEAT AND HUMIDITY INTO THE NORTHEASTERN QUADRANT OF
THE COUNTRY TODAY. TEMPERATURES AS HIGH AS THE 100S A COUPLE OF
DAYS AGO IN THE MID-ATLANTIC WILL ONLY RECOVER TO AROUND 90
DEGREES THIS AFTERNOON WITH LOWER HUMIDITY. ON THE OTHER HAND,
THE HEAT ACROSS THE WESTERN U.S. IS EXPECTED TO PERSIST THROUGH
THIS WEEKEND, WITH HIGH TEMPERATURES ONCE AGAIN EXCEEDING 100
DEGREES ACROSS MUCH OF THE REGION. IN FACT, THE HEAT IS FORECAST
TO INTENSIFY OVER THE INTERIOR PACIFIC NORTHWEST, WITH READINGS
POSSIBLY REACHING 110 DEGREES AT THE HOTTEST LOCATIONS BY SUNDAY
AFTERNOON ALONG WITH LITTLE OVERNIGHT RELIEF. MEANWHILE, HIGH
TEMPERATURES WELL INTO THE 110S WILL BE COMMON ACROSS THE DESERT
SOUTHWEST. PLEASE CONTINUE TO PRACTICE HEAT SAFETY IN THIS
PERSISTENT AND PROLONGED HEAT WAVE IN THE WESTERN U.S. THROUGHOUT
THIS COMING WEEKEND.
THE UPPER-LEVEL PATTERN THAT SUPPORTS THE HEAT THE WEST AND THE
COOLER WEATHER ACROSS THE CENTRAL TO EASTERN U.S. WILL BE SLOW TO
EVOLVE THROUGH THE NEXT FEW DAYS. A FRONT THAT SEPARATES THE COOL
AIR FROM THE WARM AND MOIST AIR ALONG THE GULF COAST WILL REMAIN
STATIONARY ACROSS THE SOUTH. SCATTERED THUNDERSTORMS WILL BE
CONFINED IN THE WARM SECTOR ACROSS THE SOUTH AND SOUTHEAST WHERE
THEY WILL LINGER THROUGH THE WEEKEND. MEANWHILE, MONSOONAL
MOISTURE WILL SUPPORT THUNDERSTORMS ACROSS THE FOUR CORNERS
REGION, LINGERING ON-AND-OFF THROUGH THE WEEKEND. ISOLATED TO
SCATTERED FLASH FLOODING AND SEVERE WEATHER MAY RESULT FROM THE
STRONGEST STORMS. FARTHER NORTH, A WEAK LOW PRESSURE WAVE WILL
LIKELY TRIGGER THUNDERSTORMS WHICH COULD BECOME STRONG TO SEVERE
OVER THE NORTH-CENTRAL PLAINS TODAY INTO TONIGHT. ADDITIONAL
THUNDERSTORMS ARE EXPECTED TO TRACK FARTHER EAST TOWARD IOWA AND
MISSOURI DURING THE WEEKEND.
KONG
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