542
FNUS21 KWNS 160659
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0158 AM CDT Mon Jun 16 2025

Valid 161200Z - 171200Z

...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN
NEVADA...SOUTHWESTERN UTAH...AND FAR NORTHWESTERN ARIZONA...

...Synopsis...
A midlevel trough will advance eastward from the West Coast across
parts of the Great Basin/Intermountain West today. Within the base
of the trough, moderate deep-layer westerly flow will overspread the
Great Basin, while a weak surface low/trough evolves over the Lower
CO River Valley.

...Southern NV into Southwest UT and far Northwest AZ...
Along the southern periphery of mid/high-level clouds preceding the
midlevel trough, strong diurnal heating of a warm/dry antecedent air
mass will result in a deeply mixed boundary layer across the
southern Great Basin. The deep mixing into the enhanced flow aloft,
along with a tightening pressure gradient peripheral to the surface
low/trough, will yield single-digit RH and 20-25 mph sustained
southwesterly surface winds (with higher gusts) across southern NV,
southwest UT, and far northwest AZ. Given increasingly dry fuels
across the region, critical fire-weather conditions are expected.

Farther north, modest westerly flow aloft across the Cascades will
contribute to locally dry/breezy downslope flow into the Columbia
Basin, where elevated fire-weather conditions are forecast.

..Weinman.. 06/16/2025

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

$$