511
FNUS28 KWNS 302146
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0444 PM CDT Sun Aug 30 2026

Valid 011200Z - 071200Z

...Synopsis...
A series of mid-level troughs will continue impacting the Pacific
Northwest and neighboring areas of the western CONUS throughout the
Extended Outlook time frame. This will leave the northwestern
quadrant of the CONUS under periodically strong southwest to
westerly flow throughout much of the forecast. Embedded disturbances
will continue to move through the persistent troughing and along the
northern periphery of the flattening/displaced upper-level ridge
centered over the Midwest US. This will deflect monsoonal moisture
to the south and east, but advect additional moisture onshore from
the eastern Pacific. The general consensus does favor continued well
below normal temperatures across the western third of the CONUS much
of the week along with increasing likelihood for multiple days of
accumulating rainfall over a good portion of the Pacific Northwest.

...Northwest, Northern Great Basin, and Northern California...
Dry southwest flow aloft associated with continual troughing over
the northwest CONUS will promote at least one more day of fire
weather concerns into mid-week. 40% Critical probabilities have been
maintained with minor adjustments for Day 3/Tuesday over
northeastern CA, northwestern NV, and southeastern OR. West to
southwest winds of 15-20 mph amid afternoon RH of 10-20% will
continue elevated fire weather concerns over this region. Below
normal surface temperatures will moderate the threat slightly, but
conditions will remain conducive to wildfire spread until a
significant precipitation event occurs. Increasing potential for
accumulating (widespread wetting) rainfall is introduced mid-week
over much of the Pacific Northwest.

...Central and Eastern Wyoming...
Persistent above normal temperatures and strengthening drought
conditions continue to promote fuel curing across central WY into
portions of the western Dakotas and far southeastern MT. These
antecedent conditions will combine with westerly winds (sustained at
15-20 mph) as trough passages continue, to result in at least
elevated wind/RH (minimums near 15-20%) combinations over this
region. Both ERCs and BIs will climb above their respective
90th-95th percentiles, indicating fuels receptivity is reaching
critical levels across the region where not hampered by significant
green up. Thus, the 40% Critical wind/RH probability was maintained
and expanded in areal extent slightly on Day 4/Wednesday with an
additional area introduced for some of the same region on Day
5/Thursday. Depending on the evolution of the upper-level troughs
that continue to progress across the northern CONUS, fire weather
concerns could persist into Day 6/Friday. However, forecast
certainty remains too low to introduce additional probabilities at
this time.

..Stearns.. 08/30/2026

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

$$