611
FXUS01 KWBC 201930
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
329 PM EDT SAT MAY 20 2023
VALID 00Z SUN MAY 21 2023 - 00Z TUE MAY 23 2023
...ABOVE-NORMAL TEMPERATURES LIKELY TO CONTINUE ACROSS MUCH OF THE
WESTERN U.S. THROUGH EARLY NEXT WEEK...
...SEVERE STORMS POSSIBLE ACROSS PORTIONS OF THE NORTHWEST AND THE
NORTHERN ROCKIES ON SUNDAY...
FOLLOWING A DAY OF WELL ABOVE-NORMAL TO RECORD-BREAKING HEAT, A
WELL-DEFINED COLD FRONT IS FORECAST TO MOVE THROUGH THE
NORTHWESTERN U.S., REACHING THE NORTHERN ROCKIES ON SUNDAY --
BRINGING COOLER TEMPERATURES AND AN INCREASED CHANCE FOR STRONG TO
SEVERE STORMS. SEVERE THUNDERSTORMS ARE POSSIBLE FROM EASTERN
WASHINGTON AND OREGON INTO NORTHWESTERN MONTANA SUNDAY AFTERNOON
AND EVENING. STORMS THAT DEVELOP MAY PRODUCE LARGE HAIL AND
DAMAGING WIND GUSTS.
ELSEWHERE ACROSS THE WESTERN U.S. AND INTO THE NORTHERN PLAINS,
TEMPERATURES ARE FORECAST TO REMAIN ABOVE-AVERAGE THROUGH THE
REMAINDER OF THE WEEKEND, INTO MONDAY. AHEAD OF THE COLD FRONT,
WELL-ABOVE NORMAL TEMPERATURES WILL SHIFT FROM THE NORTHERN
ROCKIES INTO THE PLAINS, WITH DAYTIME TEMPERATURES EXPECTED TO
REACH 10-20 DEGREES ABOVE NORMAL ACROSS EASTERN MONTANA AND THE
WESTERN DAKOTAS ON MONDAY.
FROM THE SOUTHWEST INTO THE GREAT BASIN AND SOUTHERN ROCKIES,
SHOWERS AND THUNDERSTORMS DEVELOPING THIS AFTERNOON MAY CONTINUE
INTO THIS EVENING, WITH AN ISOLATED THREAT FOR HEAVY RAINFALL AND
FLASH FLOODING. STORMS ARE LIKELY TO DIMINISH OVERNIGHT BEFORE
REDEVELOPING ONCE AGAIN ON SUNDAY.
BELOW-NORMAL TEMPERATURES ARE FORECAST TO CONTINUE FROM THE
SOUTHERN PLAINS TO THE SOUTHEAST THROUGH THE EARLY PART OF NEXT
WEEK AS A COLD FRONT DROPS SOUTH THROUGH THE REGION. THE FRONT
WILL REMAIN A FOCUS FOR SHOWERS AND THUNDERSTORMS AS IT SETTLES
ALONG THE GULF COAST.
FARTHER TO THE NORTH, THE FRONT WILL PUSH EAST THROUGH THE
REMAINDER OF THE EASTERN U.S., DRIVING A SWATH OF SHOWERS AND
THUNDERSTORMS THROUGH THE NORTHEAST AND THE MID-ATLANTIC STATES
THIS EVENING. AN AREA OF LOW PRESSURE LIFTING NORTH AHEAD OF THE
FRONT IS EXPECTED TO INCREASE THE THREAT FOR HEAVY RAIN ALONG THE
NORTHEAST COAST INTO THIS EVENING.
BEHIND THE FRONT, HIGH PRESSURE AND DRY CONDITIONS ARE FORECAST TO
SPREAD EAST FROM MIDWEST INTO THE MID-ATLANTIC ON SUNDAY.
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