606
FNUS28 KWNS 182200
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0458 PM CDT Wed Jun 18 2025

Valid 201200Z - 261200Z

...Day 3-4/Friday-Saturday...
An upper-level low entering the Pacific Northwest on Day 3/Friday
with accompanying strong mid-level jet and tightening surface
pressure gradient will promote strong southwest surface winds across
much of the Great Basin, Four Corners and parts of the Upper
Colorado Basin. 70 percent probabilities for Critical fire weather
conditions were maintained for northwestern Nevada as well as much
of southern Utah, northern Arizona and far western Colorado.
Confidence remains quite high for an expansive fire weather threat
amid an increasingly dry fuelscape. A cold front ushering in cooler
temperatures and higher relative humidity will mitigate fire weather
concerns across northwestern Nevada but mid-level jet positioning
will continue to promote strong southwest winds across northern
Arizona and much of Utah into western Colorado Day 4/Saturday. In
addition, dry, post-frontal winds in the Central Valley and adjacent
foothills combined with dry fuels will support some fire weather
threat on Day 4/Saturday.

...Day 5-8/Sunday-Wednesday...
Upper-level trough is expected to remain over the western U.S.
through early next week keeping at least modest southwest flow over
much of northern Arizona, southern Utah and Four Corners area. A
very dry boundary layer along with dry fuels will maintain elevated
wildfire spread potential early next week. Ensemble model guidance
suggests a transition to a muted zonal flow pattern by midweek
across CONUS, mitigating fire weather concerns in terms of winds
across the much of the Western U.S. beginning midweek.

..Williams.. 06/18/2025

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

$$