843
FXUS01 KWBC 210807
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT THU MAY 21 2026
VALID 12Z THU MAY 21 2026 - 12Z SAT MAY 23 2026
...ROUNDS OF STRONG TO SEVERE THUNDERSTORMS CONTINUE FROM THE
CENTRAL HIGH PLAINS SOUTHWARD TO TEXAS AND ACROSS THE DEEP SOUTH...
...A WET PATTERN SETTING UP ACROSS THE EASTERN U.S. HEADING INTO
THE MEMORIAL DAY WEEKEND...
...A ROUND OF HIGH-ELEVATION SNOW FOR THE NORTHERN TO CENTRAL
ROCKIES AS RAIN AND EMBEDDED THUNDERSTORMS SPREAD ACROSS THE LOWER
ELEVATIONS AND INTO THE NORTHERN PLAINS...
A RATHER CONVOLUTED WEATHER PATTERN IS SETTING UP ACROSS THE
EASTERN TWO-THIRDS OF THE COUNTRY AS MULTIPLE DISTURBANCES
EJECTING OUT OF THE WESTERN U.S. UPPER TROUGH WILL INTERACT WITH
ONE ANOTHER OVER THE MIDSECTION OF THE COUNTRY. THESE WAVE
EJECTIONS WILL SUSTAIN MULTIPLE ROUNDS OF STRONG TO SEVERE
THUNDERSTORMS EASTWARD FROM THE CENTRAL TO SOUTHERN HIGH PLAINS
OVER THE NEXT COUPLE OF DAYS. THESE THUNDERSTORMS APPEAR MOST
ACTIVE TODAY ACROSS OKLAHOMA AND TEXAS FOLLOWED BY A LULL ON
FRIDAY AS A LOW PRESSURE SYSTEM CONSOLIDATES AND MOVES EAST INTO
THE LOWER TO MID-MISSISSIPPI VALLEY. HOWEVER, THE NEXT ROUND OF
STRONG THUNDERSTORMS COULD RESUME FRIDAY NIGHT ACROSS THE SOUTHERN
HIGH PLAINS.
MEANWHILE, THE EASTERN U.S. IS ENTERING A PERIOD OF WET WEATHER
THROUGH THE NEXT COUPLE OF DAYS HEADING INTO THE MEMORIAL DAY
WEEKEND. THE LOW PRESSURE SYSTEM CONSOLIDATING OVER THE LOWER TO
MID-MISSISSIPPI VALLEY ON FRIDAY IS FORECAST TO GRADUALLY
INTENSIFY AND TRACK INTO THE MIDWEST TO REACH THE OHIO VALLEY BY
SATURDAY MORNING. THIS SYSTEM WILL BRING SOME BENEFICIAL RAINFALL
INTO THE EASTERN U.S. BUT THE TIMING OF THE RAIN WILL BE DURING
THE MEMORIAL DAY WEEKEND. DAMP AND COOL WEATHER WILL BE IN STARK
CONTRAST TO THE RECENT HEATWAVE FROM THE MID-ATLANTIC TO NEW
ENGLAND WHILE VERY WARM AND HUMID CONDITIONS WITH SCATTERED
THUNDERSTORMS WILL REMAIN ACROSS THE SOUTHEAST. WIDESPREAD
RAINFALL AMOUNTS OF 1 TO 2 INCHES CAN BE EXPECTED FROM THE DEEP
SOUTH TO THE OHIO VALLEY AND INTO THE CAROLINAS AND MID-ATLANTIC
THROUGH SATURDAY MORNING.
MEANWHILE, ANOTHER UPPER TROUGH FROM WESTERN CANADA IS DIPPING
INTO THE NORTHERN ROCKIES. THIS SYSTEM IS BRINGING A BROADENING
AREA OF RAIN AND HIGH-ELEVATION SNOW FROM THE NORTHERN ROCKIES
INTO THE NORTHERN HIGH PLAINS. A ROUND OF WET SNOW IS EXPECTED TO
REACH AS FAR SOUTH AS THE FRONT RANGE THIS EVENING. BY FRIDAY, A
COMPACT LOW PRESSURE SYSTEM DEVELOPING ALONG A COLD FRONT WILL
BRING A ROUND OF RAIN AND SOME EMBEDDED THUNDERSTORMS ACROSS THE
NORTHERN AND CENTRAL PLAINS. MUCH OF THE RAIN WILL REACH INTO THE
UPPER MIDWEST BY SATURDAY MORNING. IN CONTRAST TO THE WET WEATHER
FROM THE PLAINS EASTWARD, MILDER AND DRIER CONDITIONS ARE EXPECTED
ALONG THE WEST COAST AND MOST OF THE GREAT BASIN WHERE
TEMPERATURES WILL BE WARMING THROUGH THE END OF THE WEEK WITH
HIGHS REACHING WELL UP INTO THE 90S IN THE CENTRAL VALLEY OF
CALIFORNIA.
KONG
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