915
FNUS28 KWNS 132201
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0459 PM CDT Sun Jul 13 2025

Valid 151200Z - 211200Z

...Day 3/Tuesday...
A mid-level wave translating eastward through the Northern Rockies
will bring widespread and impactful fire weather threats to portions
of the West. Breezy winds and low relative humidity will be
prevalent across the Snake River Plain, interior southern CA and
especially the Great Basin where a 70 percent critical probabilities
were introduced into eastern NV/western UT. A dry boundary layer in
place coupled with enhanced mid-level flow will support surface
winds of 15-25 mph and low relative humidity over dry fuels.
Increasing mid-level monsoon moisture over the Great Basin and
Intermountain West with at least some upper-level support from the
passing trough to the north will provide for faster moving showers
and thunderstorms with limited rainfall across central/northeast NV,
much of UT and into the Four Corners area. Receptive fuels will
promote lightning ignitions with 10 percent probability of dry
thunderstorms introduced for Day 3/Tuesday.

...Day 4/Wednesday...
Residual breezy and dry conditions across southern NV/southwestern
UT will bring a continued fire weather threat to the area on Day
4/Wednesday. A few high-based thunderstorms are expected across the
higher terrain in eastern NV and much of UT but higher thunderstorm
coverage will be along and east of the Continental Divide.

...Day 5-8/Thursday-Sunday...
Higher forecast confidence exists for a mid-level low over Baja
California to move into southern CA by the end of the week. This
will aid in the northward transport of deeper monsoon moisture, with
precipitable water values in the 0.7-1.0 inch range, into the Desert
Southwest and Intermountain West through the weekend. A broad area
of mixed wet/dry thunderstorms are likely across much of the
Intermountain West and Great Basin. Farther northwest, another
upper-level trough moving into the Pacific Northwest could
reintroduce a fire weather threat for interior WA/OR for the weekend
where rainfall deficits and dry fuels persist, particularly across
the Columbia Basin. Some uncertainty in timing of the trough
precludes introductions of critical probabilities at this time.

..Williams.. 07/13/2025

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

$$