608
FNUS21 KWNS 071639
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1138 AM CDT THU AUG 07 2025
VALID 071700Z - 081200Z
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE GREAT BASIN INTO
THE CENTRAL ROCKIES...
A NARROW AREA DELINEATING POTENTIAL FOR ISOLATED DRY THUNDERSTORMS
WAS ADDED TO PORTIONS OF CENTRAL IDAHO, NORTHWEST WYOMING, AND FAR
SOUTHWEST MONTANA. A SMALL ZONE OF ISOLATED STORMS IS POSSIBLE IN
THIS REGION THIS AFTERNOON, SOUTH OF MORE WIDESPREAD ACTIVITY ACROSS
MONTANA AND VICINITY, AMID LOW PWAT VALUES AND RECEPTIVE FUELS.
ELSEWHERE, MINOR REFINEMENTS WERE MADE TO THE ISOLATED DRY THUNDER
AREA NEAR THE FOUR CORNERS REGION, WHERE STORM POTENTIAL HAS
DECREASED, ALONG WITH SOME EXPANSION EASTWARD INTO NORTH-CENTRAL NEW
MEXICO AND SOUTH-CENTRAL COLORADO, BASED ON 12Z CAM GUIDANCE AND
UPDATED FUEL GUIDANCE.
A MINOR EXPANSION WAS ALSO MADE TO THE ELEVATED AREA INTO
EAST-CENTRAL WYOMING AND VICINITY WHERE DRY/BREEZY DOWNSLOPING
WEST-SOUTHWESTERLY WINDS SHOULD EXTEND LATER THIS AFTERNOON.
..KARSTENS.. 08/07/2025
PREV DISCUSSION
/ISSUED 0156 AM CDT THU AUG 07 2025/
..SYNOPSIS
WITHIN THE BASE OF A ROBUST MIDLEVEL TROUGH MOVING ACROSS THE
NORTHERN ROCKIES, A BELT OF ENHANCED DEEP-LAYER WEST-SOUTHWESTERLY
FLOW WILL OVERSPREAD THE GREAT BASIN INTO THE CENTRAL ROCKIES -- TO
THE NORTH OF AN EXPANSIVE MIDLEVEL ANTICYCLONE CENTERED OVER THE
SOUTHERN ROCKIES.
..GREAT BASIN INTO THE CENTRAL ROCKIES
DIURNAL HEATING WILL YIELD DEEP BOUNDARY-LAYER MIXING INTO THE
ENHANCED FLOW ALOFT ACROSS THE GREAT BASIN INTO THE CENTRAL ROCKIES.
AS A RESULT, WIDESPREAD SINGLE-DIGIT TO LOWER TEENS RH WILL DEVELOP
AMID 20-25 MPH SUSTAINED WEST-SOUTHWESTERLY SURFACE WINDS. GIVEN
INCREASINGLY DRY/RECEPTIVE FUELS, ANOTHER DAY OF CRITICAL
FIRE-WEATHER CONDITIONS ARE EXPECTED.
..DRY THUNDERSTORMS - SOUTHWEST INTO THE CENTRAL ROCKIES
WITHIN A PLUME OF MIDLEVEL MOISTURE EXTENDING FROM THE SOUTHWEST
INTO THE CENTRAL ROCKIES, DIURNALLY DRIVEN HIGH-BASED THUNDERSTORMS
ARE EXPECTED -- WITH A FOCUS OVER THE HIGHER TERRAIN. THESE STORMS
WILL BE MOSTLY DRY, OWING TO INVERTED-V SOUNDINGS (0.50 TO 0.70 INCH
PW) -- POSING A RISK OF LIGHTNING-INDUCED IGNITIONS AND STRONG
OUTFLOW WINDS.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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