642
FNUS22 KWNS 171943
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0242 PM CDT SUN AUG 17 2025
VALID 181200Z - 191200Z
..NO CRITICAL AREAS
..NORTHERN ROCKIES/CENTRAL IDAHO MOUNTAINS
A MID-LEVEL TROUGH OVER THE PACIFIC NORTHWEST, RESIDUAL
PACIFIC/MONSOON MOISTURE AND DAYTIME HEATING WILL RESULT IN ISOLATED
SHOWERS AND THUNDERSTORMS ACROSS NORTHERN ID AND HIGHER TERRAIN OF
WESTERN MT. ALTHOUGH NORTHEAST THUNDERSTORM MOTIONS OF 25-30 KNOTS
WILL LIMIT RAINFALL, FUELS REMAIN MOSTLY NON-RECEPTIVE TO NEW
LIGHTNING IGNITIONS ACROSS THE NORTHERN ROCKIES, PRECLUDING
INTRODUCTION OF DRY THUNDERSTORM HIGHLIGHTS FOR MONDAY.
..GREAT BASIN
MODEST SOUTH-SOUTHWEST DEEP LAYER FLOW AND EFFICIENT DAYTIME MIXING
OF A DEEP/DRY BOUNDARY LAYER WILL SUPPORT SUSTAINED SOUTH-SOUTHWEST
WINDS OF 10-15 MPH ACROSS SOUTHERN/NORTHERN NV MONDAY AFTERNOON,
MAINLY IN LONGITUDINAL ORIENTED VALLEYS. WINDS COMBINED WITH
RELATIVE HUMIDITY NEARING 10 PERCENT WILL SUPPORT SHORT DURATION AND
LOCALIZED ELEVATED FIRE WEATHER CONDITIONS ACROSS SOUTHERN, CENTRAL
AND NORTHEASTERN NV WHERE VERY DRY FUELS EXIST.
..WILLIAMS.. 08/17/2025
PREV DISCUSSION
/ISSUED 0201 AM CDT SUN AUG 17 2025/
..SYNOPSIS
MID-LEVEL RIDGING WILL RAPIDLY BUILD OVER THE CENTRAL AND WESTERN US
MONDAY AS NORTHWEST TROUGHING CONTINUES. ABOVE NORMAL TEMPERATURES
ARE EXPECTED ALONG WITH A TEMPORARY DECREASE IN MONSOON MOISTURE
OVER MUCH OF THE WEST. WHILE THE RIDGE EXPANDS, THE MAJORITY OF THE
STRONGER WESTERLY FLOW WILL BE SHUNTED NORTHWARD, POORLY OVERLAPPING
WITH THE EXPECTED DRY CONDITIONS. WITH WEAKER FLOW ALOFT, SURFACE
WINDS ARE EXPECTED TO BE RELATIVELY BENIGN, LIMITING FIRE-WEATHER
POTENTIAL. STILL, VERY HOT AND DRY CONDITIONS ARE EXPECTED, WHICH
COULD EXACERBATE ONGOING FIRES LOCALLY. ADDITIONALLY, A FEW
THUNDERSTORMS REMAIN POSSIBLE OVER PARTS OF EASTERN ID AND WESTERN
MT NEAR THE PERIPHERY OF THE RIDGE. WHILE SOME DRY LIGHTNING STRIKES
ARE POSSIBLE IN RECEPTIVE FUELS, WETTING RAINFALL AND THE MORE
LIMITED STORM COVERAGE APPEAR UNLIKELY TO WARRANT 10% ISODRYT
COVERAGE.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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