450
FNUS22 KWNS 260611
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0111 AM CDT WED AUG 26 2026
VALID 271200Z - 281200Z
...CRITICAL FIRE WEATHER AREA FOR FAR NORTHEASTERN
CALIFORNIA...NORTHWESTERN NEVADA AND SOUTHEASTERN OREGON...
..SYNOPSIS
AN UPPER-LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST WILL BRING
AN EXPANSIVE FIRE WEATHER THREAT TO PORTIONS OF THE NORTHWESTERN
U.S., NORTHERN ROCKIES AND NORTHERN GREAT BASIN. ANOTHER ROUND OF
ISOLATED DRY THUNDERSTORMS IS EXPECTED ACROSS THE NORTHERN ROCKIES
INTO THE MT HIGH PLAINS THURSDAY AFTERNOON AND EVENING. DRY AND
BREEZY CONDITIONS SOUTH OF THE UPPER TROUGH WILL PROMOTE FIRE
WEATHER CONCERNS FOR THE COLUMBIA BASIN AND MUCH OF SOUTHWEST ID,
SOUTHEASTERN OR AND THE NORTHERN GREAT BASIN. A ZONE OF CRITICAL
FIRE WEATHER CONDITIONS ARE EXPECTED ACROSS SOUTHEASTERN OR AND
ADJACENT CA/NV WHERE SOUTHWEST WINDS WILL REACH 20 MPH AT TIMES.
...SOUTHEASTERN OREGON, FAR NORTHEASTERN CALIFORNIA AND ADJACENT
NEVADA...
A CORRIDOR OF ENHANCED SOUTHWEST WINDS OF 15-20 MPH WITH HIGHER
GUSTS WILL EVOLVE AS DEEP LAYER SOUTHWESTERLY FLOW INCREASES SOUTH
OF THE MID/UPPER TROUGH MOVING INTO THE PACIFIC NORTHWEST. A VERY
DRY BOUNDARY LAYER EMERGES THURSDAY AMID MOSTLY CLEAR SKIES, SERVING
TO ENHANCE BOUNDARY LAYER MIXING AND RESULTANT STRONGER SURFACE
WINDS. THESE WINDS, RELATIVE HUMIDITY AS LOW AS 10% AND DRY FUELS
WILL SUPPORT A RAPID FIRE SPREAD ENVIRONMENT ACROSS FAR NORTHEASTERN
CA, NORTHWESTERN NV AND PARTS OF SOUTHEASTERN OR THURSDAY AFTERNOON.
THE CRITICAL FIRE WEATHER CONDITIONS COULD ALSO IMPACT EXISTING
WILDFIRES WITHIN THE HIGHLIGHTED AREA.
...COLUMBIA BASIN, NORTHEASTERN CALIFORNIA AND NORTHERN GREAT
BASIN....
THE UPPER-LEVEL TROUGH AND ASSOCIATED INCREASING SOUTHWEST FLOW WILL
CONTINUE TO PUSH FARTHER INTO PACIFIC NORTHWEST THURSDAY. DOWNSLOPE
FLOW EAST OF THE CASCADES WILL ENHANCE DRYING IN THE COLUMBIA BASIN
WHERE RH COULD REACH 15% IN SOME LOCATIONS. THE DRY CONDITIONS
COUPLED WITH WEST/SOUTHWEST WINDS OF AROUND 15 MPH WILL PROMOTE
ELEVATED FIRE WEATHER CONDITIONS OVER RECEPTIVE FUELS.
..NORTHERN ROCKIES
THE AFOREMENTIONED UPPER-LEVEL TROUGH, SUFFICIENT MID-LEVEL MOISTURE
AND DAYTIME INSTABILITY WILL AID IN HIGH-BASED THUNDERSTORM
DEVELOPMENT ONCE AGAIN ACROSS THE NORTHERN ROCKIES AND ADJACENT HIGH
PLAINS OF MT THURSDAY AFTERNOON/EVENING. FAST SHOWER/THUNDERSTORM
MOTIONS AND A DRY, SUB-CLOUD LAYER SHOULD LIMIT SURFACE RAINFALL
ACCUMULATION, INCREASING IGNITION POTENTIAL ATOP A DRY FUELSCAPE.
..SOUTHERN CALIFORNIA
HOT TEMPERATURES IN THE 90S TO LOWER 100S UNDER AN UPPER HIGH ACROSS
SOUTHERN CA WILL PROMOTE INCREASINGLY DRY FUELS ACROSS THE REGION.
AN OFFSHORE PRESSURE GRADIENT WILL ENHANCE MAINLY NORTHERLY WINDS,
PARTICULARLY THURSDAY EVENING/NIGHT ACROSS WIND PRONE AREAS OF
LA/VENTURA/SANTA BARBARA COUNTIES, LEADING TO AN ELEVATED FIRE
WEATHER THREAT.
..WILLIAMS.. 08/26/2026
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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