377
FNUS21 KWNS 181511
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1011 AM CDT Mon Aug 18 2025

Valid 181700Z - 191200Z

...NO CRITICAL AREAS...

Minimum RH near and below 10% with very poor RH recovery overnight
is expected from central Nevada through the West Slope and into
northwest Arizona and southeast California resulting in long burning
periods. The forecast remains on track, and please see the previous
discussion for more details.

..Nauslar.. 08/18/2025

.PREV DISCUSSION... /ISSUED 0201 AM CDT Mon Aug 18 2025/

...Synopsis...
As upper-level ridging builds rapidly over the West, modest
south-southwest deep layer flow and efficient daytime mixing of a
deep/dry boundary layer will support sustained south-southwest winds
of 10-12 mph across southern/northern NV this afternoon. 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.

...Northern Rockies/Central Idaho Mountains...
A mid-level trough will persist over the Northwest on the periphery
of the building upper ridge. 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.

...Please see www.spc.noaa.gov/fire for graphic product...

$$