398
FNUS22 KWNS 131959
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0258 PM CDT Sun Jul 13 2025

Valid 141200Z - 151200Z

...CRITICAL FIRE WEATHER AREA FOR CENTRAL WASHINGTON...

...Columbia Basin...
Increasing mid-level flow associated with a mid-level trough
entering the Pacific Northwest along with a tightening onshore
surface pressure gradient will support enhanced downslope winds into
the Columbia Basin Monday. Minimum daytime relative humidity of
15-20 percent combined with west winds initially of around 15 mph
will promote a broad elevated fire weather concern for the Columbia
Basin. A considerable wind shift is expected with the dry cold front
passage beginning early afternoon across the Okanagan Valley before
reaching the Columbia River by evening. Although relative humidity
will rise behind the front, a few hours of sustained north winds of
20-30 mph could significantly impact existing active or new fires
Monday. Critical highlights were added to address this threat across
central Washington.

...Northern Great Basin...
Mid-level Pacific moisture along with increasing daytime instability
over a very dry sub-cloud layer will support isolated dry
thunderstorm development primarily over the higher terrain of
northeastern CA and along the northern NV border Monday afternoon.
Dry fuels will support new ignitions from thunderstorms with minimal
rainfall, prompting addition of isolated dry thunderstorm
highlights.

..Williams.. 07/13/2025

.PREV DISCUSSION... /ISSUED 1135 PM CDT Sat Jul 12 2025/

...Synopsis...
Winds across the Pacific Northwest will increase again on D2/Monday
as a belt of enhanced mid-level westerlies moves out of British
Columbia along with a south-southeastward moving cold front.
Elevated fire weather concerns will continue across the Cascades
into the Columbia River Basin and further east in the Snake River
Plain in Idaho. Winds around 15-20 mph will overlap relative
humidity reductions to around 15-20 percent in these regions. A few
hours of locally Critical conditions will be possible across the
Snake River Plain, however, limited coverage precludes introduction
of a Critical area.

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

$$