594
FXUS01 KWBC 191951
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
351 PM EDT FRI JUL 19 2024
VALID 00Z SAT JUL 20 2024 - 00Z MON JUL 22 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 NORTHERN
AND CENTRAL PLAINS...
THE NORTHEAST WILL HAVE A 10 TO 15 DEGREE COOL DOWN AS A COOL AIR
MASS ARRIVES FROM CENTRAL CANADA. IN CONTRAST, 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. 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. DAILY HIGHS ACROSS THE SOUTHWEST WILL GENERALLY
HOVER IN THE 110S. 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 WILL BE SLOW TO CHANGE ACROSS THE LOWER
48. A NEARLY STATIONARY FRONT WILL REMAIN DRAPED ACROSS THE SOUTH
AND INTO THE MID-ATLANTIC REGION, KEEPING THE COOLER AIR NORTH OF
THE BOUNDARY AND THE WARM, MOIST AIR TO THE SOUTH. THIS FEATURE
WILL BE THE FOCUS FOR SCATTERED THUNDERSTORMS ALONG THE GULF COAST
AND THE SOUTHEAST THROUGH THE WEEKEND. FOR THE SOUTHWEST/FOUR
CORNERS REGION, MONSOONAL MOISTURE WILL CONTINUE TO SUPPORT
THUNDERSTORMS TO LINGERING ON-AND-OFF THROUGH THE WEEKEND. THIS
WILL MAINTAIN AN ELEVATED THREAT FOR ISOLATED TO SCATTERED FLASH
FLOODING AND SEVERE WEATHER MAY RESULT FROM THE STRONGEST STORMS.
FOR THE HIGH PLAINS, A WEAK LOW PRESSURE WAVE WILL LIKELY TRIGGER
THUNDERSTORMS WHICH COULD BECOME STRONG TO SEVERE THIS AFTERNOON
AND PERSIST THROUGH THE EVENING AND OVERNIGHT HOURS. ADDITIONAL
THUNDERSTORMS ARE EXPECTED TO TRACK FARTHER EAST TOWARD IOWA AND
MISSOURI DURING THE WEEKEND.
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