261
FXUS01 KWBC 270618
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
218 AM EDT WED AUG 27 2025
VALID 12Z WED AUG 27 2025 - 12Z FRI AUG 29 2025
...SCATTERED AREAS OF FLASH FLOODING REMAIN POSSIBLE IN AND NEAR
IDAHO WEDNESDAY...
...HEAVY RAINFALL WITH FLASH FLOOD POTENTIAL SLATED FOR PORTIONS
OF THE SOUTHERN & CENTRAL PLAINS TOWARDS THE MID-SOUTH THROUGH
THURSDAY...
...ABOVE-NORMAL TEMPERATURES PERSIST ACROSS THE NORTHWEST;
BELOW-AVERAGE TEMPERATURES EXPECTED FOR MUCH OF THE REMAINING
CONTIGUOUS U.S.....
ON WEDNESDAY, STORMS ARE EXPECTED TO BE MORE ISOLATED IN THE
SOUTHWEST, GREAT BASIN, AND SIERRA NEVADA. HOWEVER, AN UPPER-LEVEL
DISTURBANCE WILL BRING MORE WIDESPREAD ACTIVITY AND A HIGHER RISK
OF HEAVY RAIN AND FLASH FLOODING ACROSS THE NORTHERN INTERMOUNTAIN
WEST AND NORTHERN ROCKIES. ON THURSDAY AND FRIDAY, THE RISK FOR
HEAVY RAINFALL AND FLASH FLOODING CONTINUES TO WANE ACROSS THE
GREAT BASIN AND ROCKIES AND RIDGING ALOFT SLOWLY BUILDS.
TEMPERATURES WILL BE ABOVE AVERAGE AGAIN TODAY, BUT THE
UPPER-LEVEL SYSTEM AND INCREASED CLOUD COVER WILL HELP ALLEVIATE
THE ONGOING HEATWAVE IN THE NORTHWEST AND NORTHERN INTERMOUNTAIN
WEST WHERE ESPECIALLY WARM OVERNIGHT TEMPERATURES (GETTING NO
LOWER THAN THE 60S TO LOWER 70S) SHOULD PERSIST THROUGH WEDNESDAY
NIGHT.
A SERIES OF DISTURBANCES FROM THE WESTERN U.S. WILL INTERACT WITH
MOISTURE SPREADING THROUGH THE SOUTHERN PLAINS, PRODUCING STORMS
WITH HEAVY RAINFALL AND SCATTERED TO NUMEROUS INSTANCES OF FLASH
FLOODING OVER THE CENTRAL ROCKIES AND HIGH PLAINS WEDNESDAY AND
THURSDAY WHICH SPREAD EAST THROUGH KANSAS INTO NORTHWEST ARKANSAS
ON WEDNESDAY AND SHIFT INTO THE VICINITY OF ARKANSAS ON THURSDAY.
HOURLY RAIN AMOUNTS TO 2.5" WOULD BE ESPECIALLY PROBLEMATIC IN
URBAN AREAS. BY FRIDAY, THUNDERSTORMS WITH HEAVY RAIN ACROSS THE
HIGH PLAINS AND NEAR THE GULF COAST ARE EXPECTED TO BE NO MORE
THAN AN ISOLATED FLASH FLOOD CONCERN.
APART FROM THE NORTHWEST AND THE GULF COAST STATES, DAYTIME
TEMPERATURES ARE EXPECTED TO BE SEASONAL TO BELOW AVERAGE ACROSS
MUCH OF THE CONTIGUOUS U.S AS UPPER LEVEL TROUGHING REMAINS
FEATURED EAST OF THE ROCKIES. FORECAST TO DIP MORE THAN 15
DEGREES BELOW AVERAGE IN SOME SPOTS, PARTICULARLY WHERE IT IS
RAINING PERSISTENTLY ACROSS PORTIONS OF KANSAS AND ARKANSAS
WEDNESDAY AND THURSDAY AND IN THE VICINITY OF OHIO ON FRIDAY.
RECORD LOWS ARE POSSIBLE ACROSS PARTS OF THE OHIO VALLEY, MID
ATLANTIC, AND NORTHEAST WEDNESDAY NIGHT/THURSDAY MORNING.
ROTH/PEREIRA
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