967
FNUS22 KWNS 210658
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0157 AM CDT Thu Aug 21 2025

Valid 221200Z - 231200Z

...Synopsis...
As the upper ridge persist over the West, several subtropical
perturbations will arrive from the south, ushering in another surge
of monsoon moisture. Isolated thunderstorms are likely across the
southern Sierra and into parts of the Great Basin Friday. With very
warm surface temperatures and dry sub-cloud layers, little wetting
rainfall is expected. This should allow for isolated dry lightning
atop receptive fuel mainly over portions of California and Nevada
where fuels are most receptive. Some localized dry and breezy winds
may also occur outside of the thunderstorms over the central great
Basin Friday.

Over the southern Great Basin and Southwest, higher PWATs near 1
inch are expected. Isolated to widely scattered thunderstorms are
likely through the afternoon. However, a wetter storm mode is more
probable across northern Arizona, southern Utah and western
Colorado, where fuels are also less receptive.

...California...
Isolated thunderstorms are likely in portions of southern California
mountains and over the Mojave. A wetter mode is expected with max
PWATs near 1.2 to 1.3 inches and little in the way of steering flow.
However, cloud bases are likely to be over 3-km with a hot/dry
sub-cloud layer limiting some precipitation efficiency. Sporadic dry
strikes re possible given the degree of extreme heat and dry fuels
but coverage is not expected to reach 10% or greater. Additionally,
very hot, dry and unstable conditions may support plume dominated
fire behavior with existing large fires.

..Lyons.. 08/21/2025

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

$$