####018001325####
FNUS21 KWNS 180702

FWDDY1



Day 1 Fire Weather Outlook  

NWS Storm Prediction Center Norman OK

0201 AM CDT Mon Aug 18 2025



Valid 181200Z - 191200Z



...NO CRITICAL AREAS...



...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.



..Lyons.. 08/18/2025



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



$$

####018001250####
FNUS22 KWNS 180702

FWDDY2



Day 2 Fire Weather Outlook  

NWS Storm Prediction Center Norman OK

0201 AM CDT Mon Aug 18 2025



Valid 191200Z - 201200Z



...Synopsis...

A amplifying mid-level ridge over the Four Corners region and

north-central U.S. will support a large area of hot and dry

conditions to much of the Intermountain West Tuesday. While flow

aloft will not be overly strong as the ridge continues to build,

occasional 15 mph surface gusts and terrain-augmented winds are

possible during the afternoon over parts of the eastern Great Basin.

In combination with the very hot and dry conditions, elevated

fire-weather conditions are expected for a few hours Tuesday

afternoon within exceptionally dry fuels.



...Northern Rockies...

To the northwest, a mid-level trough and remnant monsoon moisture 

should continue to promote isolated thunderstorm potential across

the higher terrain of the northern Rockies. While lightning is

possible, the very isolated storms are expected over areas with less

receptive fuels. This should largely limit, but not entirely negate

ignition potential Tuesday.



..Lyons.. 08/18/2025



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



$$