228
FNUS21 KWNS 151735
FWDDY1

Day 1 Fire Weather Outlook CORR 1
NWS Storm Prediction Center Norman OK
1235 PM CDT Tue Jul 15 2025

Valid 151700Z - 161200Z

CORRECTED FOR ERRANT LINE IN SOUTHERN TEXAS

...CRITICAL FIRE WEATHER AREA FOR NORTHEASTERN NEVADA...NORTHWESTERN
UTAH AND SOUTH CENTRAL IDAHO...
...CRITICAL FIRE WEATHER AREA FOR EASTERN NEVADA INTO WESTERN UTAH
AND NORTHERN ARIZONA...

...Dry Thunderstorms...
A mid-level trough and attendant increased mid-level flow will
provide support for more sustained convection across portions
northeastern NV, far northwestern UT and south-central ID this
afternoon. High-based thunderstorm motions of 25-30 mph will limit
rainfall to less than 0.10 inch while also bringing potential new
ignitions over a very dry fuelscape in addition to gusty and erratic
outflow winds from downbursts. Less concentrated but still impactful
elevated thunderstorms will bring new ignition potential to portions
of the Four Corners area, much of UT, northeastern NV, southeastern
ID and western WY.

Otherwise, dry and breezy conditions across the Snake River Plain
and the Great Basin will bring elevated fire weather conditions to
the region today. A critical fire weather threat remains for
portions of southeast NV, southwestern UT and the Arizona Strip.

..Williams.. 07/15/2025

.PREV DISCUSSION... /ISSUED 0154 AM CDT Tue Jul 15 2025/

...Synopsis...
An active day for fire weather is expected across the Southwest and
Great Basin today. A deepening mid-level wave will bring an increase
in winds and potential for dry thunderstorms across the Great Basin
today. Elevated to Critical conditions can be expected in portions
of eastern Nevada, western Utah, northern Arizona and southern
Idaho.

...Eastern Nevada, western Utah, northern Arizona...
West to southwesterly flow around 15-20 mph will overlap afternoon
relative humidity reductions to 10-15 percent across portions of
eastern NV, western UT, and northern AZ. Fuels in these regions are
critically dry, with notable increase in fire activity over the last
couple of weeks. In addition to background surface winds, nearby
thunderstorm activity may further produce gusty and erratic outflow
winds.

...Dry Thunderstorms...
A broad area of dry thunderstorms will be possible across portions
of northern Arizona into western Colorado, Utah, far southern Idaho,
western Wyoming, and Nevada. Moisture varies across these regions
with potential for a mix of wet/dry storms in a few locations.
Moisture remains mostly mid-level and with increased storm motions
expected with the passage of the mid-level trough, it is likely that
rainfall will be limited and local with new lightning ignitions
possible. Fuels are critically dry with an uptick in fire activity
over last several weeks.

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

$$