546
FNUS21 KWNS 070639
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0139 AM CDT SUN SEP 07 2025
VALID 071200Z - 081200Z
..SYNOPSIS
A MID-LEVEL TROUGH WILL IMPINGE ON THE WEST COAST WHILE UPPER
RIDGING PERSISTS OVER THE ROCKIES TODAY. THE APPROACH OF THIS UPPER
TROUGH WILL ENCOURAGE LOCALLY DRY AND BREEZY CONDITIONS ACROSS
PORTIONS OF THE WESTERN AND NORTHERN GREAT BASIN, THOUGH THESE
CONDITIONS SHOULD LARGELY REMAIN BELOW ELEVATED THRESHOLDS. UPPER
SUPPORT WITH THIS TROUGH WILL ALSO LIFT A BUOYANT AIRMASS ACROSS
EASTERN PARTS OF THE PACIFIC NORTHWEST INTO THE NORTHERN ROCKIES,
WHERE BOTH A DRY BOUNDARY LAYER (EXTENDING TO OVER 700 MB) AND DRY
FUELS WILL OVERLAP. THUNDERSTORMS THAT DEVELOP WITHIN THIS REGIME
WILL BE BOTH WET AND DRY AND NATURE. HOWEVER, THE DEGREE OF FUEL
RECEPTIVENESS OVER EASTERN PARTS OF THE PACIFIC NORTHWEST INTO THE
NORTHERN ROCKIES SUGGESTS THAT LIGHTNING-INDUCED IGNITIONS MAY BE
EFFICIENT, WARRANTING THE CONTINUANCE OF ISOLATED DRY THUNDERSTORM
HIGHLIGHTS.
..SQUITIERI.. 09/07/2025
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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