331
FNUS22 KWNS 021959
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0258 PM CDT Wed Jul 02 2025

Valid 031200Z - 041200Z

...Northern Great Basin and Western Nevada...
An approaching short wave trough and stronger mid-level flow will
support shower and thunderstorm development across northeastern CA
into southeastern OR Thursday. Faster northeast thunderstorm
trajectories will limit precipitation amounts supporting an isolated
dry thunderstorm threat. A corridor of daytime instability and
precipitable water values of 0.5 to 0.7 inches will bring an
isolated dry thunderstorm threat to the higher terrain of far
northern NV, northern UT as well as far southeastern ID. The
incoming trough will also promote stronger downslope flow east of
the Sierra Crest across northwestern NV. Enhanced downslope winds
from the west of 15-20 mph and relative humidity of around 15%
supports continuation elevated fire weather highlights.

...Western Slope and Eastern Utah...
A broad plume of monsoon moisture over the region along with daytime
heating will promote a mix of wet and dry thunderstorms over higher
terrain of the Western Slope as well as eastern UT. Some lightning
ignitions are possible within remaining pockets of receptive fuels.

..Williams.. 07/02/2025

.PREV DISCUSSION... /ISSUED 0227 AM CDT Wed Jul 02 2025/

...Synopsis...
Broad troughing over the western US will continue as a compact
shortwave trough moves across northern CA Thursday. 40-50 kt
westerly flow will overspread the northern Great Basin. This will
encourage dry downslope flow across parts of western NV. At the same
time, continued monsoon moisture will allow widespread showers and
thunderstorms over the Intermountain West.

...Northwest Great Basin...
Continued westerly flow aloft will overspread the northern Great
Basin Thursday afternoon. Dry downslope winds of 15-25 mph are
expected, aided by the increasing winds aloft. Very warm
temperatures, and the dry downslope trajectories, will support
widespread RH values below 15%. The increase in surface winds amid a
warm and dry boundary layer and dry fuels will support elevated
wildfire spread potential Thursday.

...Western Slope...
Another day of widespread showers and thunderstorms is expected
across the eastern Great Basin and western Rockies Thursday. A
continued surge of robust monsoon moisture (PWATS above 0.8 inches)
will support a mixed mode of wet and occasionally dry storms.
Widespread QPF of 0.1-0.25 inches in the preceding days suggest area
fuels are likely to become less receptive to lightning ignitions
with time. However, the coverage of storms does support at least
isolated potential for dry strikes in receptive fuels across western
CO/WY into eastern UT.

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

$$