845
FNUS28 KWNS 012108
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0406 PM CDT Mon Sep 01 2025

Valid 031200Z - 091200Z

An expansive mid/upper-level ridge is forecast across the western US
extending northward into portions of British Columbia Day
3/Wednesday. Meanwhile, a compact mid/upper-level low is forecast to
drift along the western periphery of the ridge over Oregon Day
3/Wednesday. Thereafter, the evolution of the low (and overall
synoptic pattern in the days following) continues to remain somewhat
uncertain due to poor inter/intra-model variability. Nevertheless,
the low is now generally forecast to move more quickly
north/northwestward, reaching across portions of the Washington
coast by Day 4/Thursday. While details remain unclear beyond Day
4/Thursday, guidance appears to be favoring the continuation of an
inland western US upper-level ridge and some form of coastal trough
through next weekend.

...Day 3/Wednesday: Northern California and the Northwest...
Dry thunderstorm potential is forecast to linger at least into Day
3/Wednesday across portions of northern California, Oregon, western
Idaho, and far southern Washington, as the aforementioned
upper-level low drifts northward and increasing moisture and ascent
interact with a hot and unstable atmosphere. While dry thunderstorm
potential may remain across some of these areas beyond Day
3/Wednesday due to the aforementioned lingering coastal troughing,
uncertainties in thunderstorm coverage, locations, and mode
(wet/dry) are currently too large to introduce isolated dry
thunderstorm probabilities.

..Elliott.. 09/01/2025

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

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