410
FNUS21 KWNS 020659
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0158 AM CDT SAT AUG 02 2025
VALID 021200Z - 031200Z
...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/SOUTHEASTERN
UTAH INTO NORTHWESTERN COLORADO...
..SYNOPSIS
ALONG THE NORTHERN PERIPHERY OF A LARGE-SCALE RIDGE CENTERED ON THE
SOUTHWEST/NORTHERN MEXICO, A WESTERLY MIDLEVEL JET STREAK WILL
OVERSPREAD THE SOUTHERN/EASTERN GREAT BASIN. IN RESPONSE, A WEAK
SURFACE LOW WILL DEVELOP OVER EASTERN UT, RESULTING IN A TIGHTENING
PRESSURE GRADIENT ACROSS THE AREA.
..SOUTHERN/EASTERN UT INTO NORTHWEST CO
DIURNAL HEATING WILL RESULT IN A DEEPLY MIXED BOUNDARY LAYER ACROSS
THE SOUTHERN/EASTERN GREAT BASIN, WHERE WIDESPREAD SINGLE-DIGIT RH
IS EXPECTED DURING THE AFTERNOON. BOUNDARY-LAYER MIXING INTO THE
STRENGTHENING FLOW ALOFT, COUPLED WITH AN ENHANCED PRESSURE
GRADIENT, WILL YIELD 20 MPH WEST-SOUTHWESTERLY SURFACE WIND FROM
SOUTHERN/EASTERN UT INTO NORTHWEST CO. THE COMBINATION OF BREEZY
SURFACE WINDS AND LOW RH WILL FAVOR CRITICAL FIRE-WEATHER
CONDITIONS, GIVEN RECEPTIVE FUELS ACROSS THE REGION.
..DRY THUNDERSTORMS - INTERMOUNTAIN WEST
DIURNALLY DRIVEN HIGH-BASED THUNDERSTORMS ARE EXPECTED ACROSS THE
INTERMOUNTAIN WEST, AIDED BY WEAK LARGE-SCALE FORCING FOR ASCENT
AHEAD OF A DEAMPLIFYING MIDLEVEL TROUGH. AROUND 0.7 INCH PW AND A
DEEP/DRY BOUNDARY LAYER WILL SUPPORT MOSTLY DRY THUNDERSTORMS,
CAPABLE OF LIGHTNING-INDUCED IGNITIONS OVER ANY RECEPTIVE FUELS.
..WEINMAN.. 08/02/2025
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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