203
FNUS28 KWNS 042036
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0334 PM CDT Thu Sep 04 2025

Valid 061200Z - 121200Z

A negatively-tilted upper-level shortwave trough will continue to
track slowly northward across the Northwest Day 3/Saturday into Day
4/Sunday. A larger upper low will move into the Northwest late Day
4/Sunday through Day 6/Tuesday, with upper-level troughing likely
deepening over the West Coast through mid-next week. Upper-level
troughing may develop over most of the West mid to late next week,
but forecast uncertainty remains high on the progression of the
upper-level trough over the West/West Coast.

Isolated to scattered mixed wet/dry thunderstorms are likely in
portions of the Northwest and northern Rockies/Great Basin on Day
3/Saturday - Day 4/Sunday, with the Cascades having the best
chances. Onshore flow will bring showers, higher RH, and cooler
temperatures to the Northwest and eventually the northern Rockies
and northwest California beginning late Day 4/Sunday and likely
lasting through much of the outlook period. This pattern change and
potential preceding wetting rain in areas on Day 1/Thursday - Day
2/Friday will limit the impacts of potential ignitions on Day
3/Saturday - Day 4/Sunday and slow fire activity across the
northwestern US. However, if the upper-level trough slows or changes
track in the coming days, areas may need to be introduced.

Dry/windy conditions are likely to develop across portions of the
central/southern Intermountain West on Day 4/Sunday - Day
7/Wednesday as upper-level troughing moves into the West. Fuel
conditions are vastly improved after the last monsoonal surge.
However, the environment will be monitored, especially in areas that
received less wetting rain with the last monsoon surge, for
potential overlap of critical winds/RH and receptive fuels.

..Nauslar.. 09/04/2025

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

$$