129
FNUS21 KWNS 071624
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1124 AM CDT SUN JUN 07 2026
VALID 071700Z - 081200Z
..CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SOUTHWEST
GREAT
BASIN...CENTRAL ROCKIES...
..CRITICAL FIRE WEATHER AREA FOR PORTIONS OF SOUTHERN IDAHO
..SOUTHWEST, GREAT BASIN, AND CENTRAL ROCKIES
DRY SOUTHWESTERLY FLOW AHEAD OF A SURFACE COLD FRONT DRAPED OVER THE
GREAT BASIN AND RELATED UPPER-LEVEL TROUGH MOVING INTO THE NORTHERN
ROCKIES WILL BRING A BROAD FIRE WEATHER THREAT TO MUCH OF THE
SOUTHWEST, GREAT BASIN, AND CENTRAL ROCKIES TODAY. A CORRIDOR
STRONGER SOUTHWEST WINDS OF 20-25 MPH (LOCALLY 30 MPH IN FAVORED
TERRAIN AREAS) COMBINED WITH A DEEP, DRY BOUNDARY LAYER SUPPORTING
RH OF 5-15% THIS AFTERNOON WILL BRING CRITICAL FIRE WEATHER
CONDITIONS FROM NORTHERN AZ INTO SOUTHEASTERN UT, WESTERN SLOPE OF
CO AND INTO SOUTH-CENTRAL WY.
INTRODUCTION OF SOME MID-LEVEL MOISTURE FROM THE ADVANCING TROUGH, A
WEAK FRONTAL BOUNDARY AND PRESENCE OF A RELATIVE MID-LEVEL FLOW
MAXIMA AND ASSOCIATED INCREASED SHEAR SHOULD BRING A DRY
THUNDERSTORM POTENTIAL TO PORTIONS OF CENTRAL/NORTHEASTERN UT INTO
SOUTHWESTERN WY WHERE A DRY-SUB CLOUD LAYER WILL BE MAINTAINED.
ISOLATED HIGH-BASED THUNDERSTORMS WITH MINIMAL SURFACE RAINFALL OVER
DRY FUELS WILL PRESENT A HEIGHTENED IGNITION POTENTIAL THIS
AFTERNOON, IN ADDITION TO DRY AND BREEZY CONDITIONS. THE WESTERN
EXTENT OF ISOLATED DRY THUNDERSTORM HIGHLIGHTS WAS TRIMMED BASED ON
LATEST MODEL GUIDANCE CONSENSUS.
..SNAKE RIVER PLAIN
COOLER, BUT VERY DRY POST-FRONTAL CONDITIONS ARE EXPECTED IN THE
SNAKE RIVER PLAIN AND ADJACENT FOOTHILLS OF SOUTHERN ID TODAY.
STRONG WESTERLY WINDS AT THE BASE OF THE MID-LEVEL TROUGH WILL REACH
20-30 MPH THIS AFTERNOON IN SOUTHERN ID. THESE WINDS MERGED WITH RH
OF 5-15% BY PEAK AFTERNOON MIXING AND DRY FUELS WILL BRING SEVERAL
HOURS OF CRITICAL FIRE WEATHER CONDITIONS TO THE SNAKE RIVER PLAIN.
CRITICAL AND ELEVATED HIGHLIGHTS WERE EXTENDED SLIGHTLY EASTWARD
ACCOUNTING LATEST FORECAST GUIDANCE.
..WILLIAMS.. 06/07/2026
PREV DISCUSSION
/ISSUED 0121 AM CDT SUN JUN 07 2026/
..SYNOPSIS
A LONGWAVE MID-LEVEL TROUGH WILL REMAIN SITUATED OVER THE
NORTHWESTERN CONUS THROUGH THE DAY ON SUNDAY, WITH A SHORTWAVE
TROUGH MOVING ACROSS THE NORTHERN ROCKIES. THE ATTENDANT SURFACE LOW
AND COLD FRONT WILL RESULT IN BREEZY CONDITIONS ACROSS PORTIONS OF
THE GREAT BASIN, SOUTHWESTERN CONUS, AND NORTHERN ROCKIES WITH LOW
RH VALUES AND CRITICALLY DRY FUELS.
..SOUTHWEST, GREAT BASIN, AND CENTRAL ROCKIES
AHEAD OF THE COLD FRONT, STRONG VERTICAL MIXING AND A TIGHT PRESSURE
GRADIENT WILL RESULT IN GUSTY WINDS TO 25-35 MPH ALONG WITH 5-15%
RH. POOR OVERNIGHT RH RECOVERY ACROSS MUCH OF THE AREA IS EXPECTED
TO CONTRIBUTE TO CRITICALLY DRY FUELS ACROSS THE REGION. FOR THESE
REASONS, A CRITICAL AREA HAS BEEN MAINTAINED IN THIS OUTLOOK.
ADDITIONALLY, THE COLD FRONT MAY PROVIDE ENOUGH LIFT AND MID-LEVEL
MOISTURE FOR THUNDERSTORM DEVELOPMENT ACROSS PORTIONS OF UTAH TO
CENTRAL WYOMING. GIVEN LOW PRECIPITABLE WATER VALUES AND RELATIVELY
FAST STORM MOTIONS, SOME ISOLATED DRY THUNDER MAY OCCUR IN THIS
REGION.
..SNAKE RIVER PLAIN
BENEATH THE DEPARTING MID-LEVEL JET MAX, A RELATIVELY LOCALIZED AREA
OF CRITICAL CONDITIONS IS EXPECTED IN THE SNAKE RIVER PLAIN IN IDAHO
COLOCATED. HERE, STRONG VERTICAL MIXING WILL RESULT IN WINDS OF
25-35 MPH ALONG WITH 10-15% RH. DRY FUELS IN THIS REGION MEAN THAT A
CRITICAL AREA IS WARRANTED.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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