303
FXUS01 KWBC 222009
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
408 PM EDT THU OCT 22 2026
VALID 00Z FRI OCT 23 2026 - 00Z SUN OCT 25 2026
...EXCESSIVE RAINFALL AND SEVERE WEATHER IMPACTS CALIFORNIA, THE
SOUTHWEST, AND FOUR CORNERS...
...DEVELOPING LOW PRESSURE SYSTEM USHERS IN MUCH COOLER WEATHER
OVER THE CENTRAL U.S. THIS WEEKEND...
THIS AFTERNOON, RADAR AND SATELLITE SHOW BANDS OF SHOWERS AND
THUNDERSTORMS EXPANDING ACROSS THE WESTERN U.S. AHEAD OF A DEEP
UPPER-LOW CENTERED OVER CALIFORNIA. A BUSY AFTERNOON FOR EXCESSIVE
RAINFALL AND SEVERE WEATHER IS UNDERWAY FOR MUCH OF THE REGION AS
THIS ACTIVITY TAPS INTO A TROPICAL AIRMASS BEING PULLED NORTHWARD
AHEAD OF A DESERT SOUTHWEST COLD FRONT. THROUGH TOMORROW MORNING,
NUMEROUS TO WIDELY SCATTERED INSTANCES OF FLASH FLOODING AND
SEVERE WEATHER ARE EXPECTED OVER THE FOUR CORNERS AND PORTIONS OF
THE SOUTHWEST, RESPECTIVELY. THE THREAT FOR HEAVY RAINFALL AND
SEVERE WEATHER WILL SLOWLY MIGRATE EASTWARD INTO NEW MEXICO AND
THE SOUTHERN PLAINS OVER THE NEXT 48 HOURS WITH THE COLD FRONT.
CONCURRENTLY, A LEE-SIDE CYCLONE IS FORECAST TO DEVELOP OVER THE
NORTHERN HIGH PLAINS WITH THE ARRIVAL OF AN UPPER-TROUGH FROM THE
NORTHERN PACIFIC. BY LATE FRIDAY, TEMPERATURES IN THE NORTHERN
ROCKIES WILL BEGIN TO CRASH BEHIND A STRONG COLD FRONT SLIDING
DOWN THE TERRAIN. ACCORDINGLY, A TRANSITION FROM RAIN TO SNOW
COULD LEAD TO A FEW INCHES OF SNOWFALL IN THIS AREA, WHERE A
HANDFUL OF WINTER WEATHER ADVISORIES ARE IN EFFECT. AS THE LOW
DEEPENS AND THE FRONT SWEEPS ACROSS THE HEARTLAND THIS WEEKEND,
TEMPERATURES COULD COOL BY 20-25 DEGREES, PUTTING AN END TO THE
UNUSUALLY WARM WEATHER.
ASHERMAN/KEBEDE
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