447
FNUS22 KWNS 291943
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0242 PM CDT Tue Jul 29 2025

Valid 301200Z - 311200Z

...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF NORTHERN
CALIFORNIA/NEVADA AND OREGON...

...20z Update...
Confidence continues to increase in widespread thunderstorms across
parts of the Northwest and northern Great Basin Wednesday. As
moisture associated with a prominent shortwave trough lifts
northward, thunderstorm development is likely by early afternoon
across the higher terrain of northern CA/NV and southern OR.
Forecast soundings depict weak buoyancy atop inverted-v
thermodynamic profiles, which would support high-based, fast-moving
thunderstorms over receptive fuels. With minimal rainfall
accumulations, lightning ignitions are likely. A few storms may
persist overnight as the shortwave trough continues northward into
southern WA and the Cascades. Given the threat for scattered to
numerous thunderstorms, critical dry thunderstorm highlights will be
maintained and shifted west/south for recent model guidance.

...Southern and eastern Great Basin...
Dry and breezy conditions are likely across parts of southern NV and
western UT D2/Wednesday afternoon. Aided by enhanced westerly flow
aloft, surface gusts of 15-25 mph and RH below 15% are likely. With
dry fuels, elevated fire-weather conditions are expected.

..Lyons.. 07/29/2025

.PREV DISCUSSION... /ISSUED 0217 AM CDT Tue Jul 29 2025/

...Synopsis...
Upper ridging will persist across the central and eastern CONUS
while broad mid-level troughing remains in place along the West
Coast tomorrow (Wednesday). Mid-level moisture will continue to
pivot around the mid-level trough, toward the upper ridge, from the
Pacific Northwest into the northern Rockies. An embedded mid-level
impulse, accompanied by stronger flow aloft, will traverse the
northwest Great Basin and move northwestward into the Pacific
Northwest through the late afternoon to overnight period. As this
occurs, enhanced lift will promote at least scattered thunderstorms
over portions of the Pacific Northwest. Broad isolated
dry-thunderstorm highlights are in place for areas that will
experience lightning over dry fuels.

Along and east of the Cascades, forecast soundings depict inverted-v
thermodynamic profiles, which would support high-based, potentially
fast-moving thunderstorms. These storms may pass over fuels
receptive to fire spread, but with minimal rainfall accumulations
given fast storm speeds. Given the potentially higher density of
fast moving storms east of the Cascades, scattered dry thunderstorm
highlights have been introduced for central and eastern Oregon into
extreme northwest Nevada.

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

$$