009
FNUS22 KWNS 301958
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0257 PM CDT Mon Jun 30 2025

Valid 011200Z - 021200Z

...Northern California into Oregon...
Upper-level low and favorable convective environment will support a
mix of dry/wet thunderstorms mainly across the higher terrain of
northern California into much of southern and central Oregon.
Isolated dry thunderstorm highlights were adjusted slightly
southward along the California Coastal Range and northern Sierra
Nevada.

...Great Basin...
The mid-level trough and associated elevated mid-level flow will
promote elevated to locally critical fire weather conditions across
much of central and eastern Nevada. South winds of 15-20 mph
combined with relative humidity at or below 15 percent will support
higher wildfire spread potential within dry fuels.

...Central Utah into Northwestern Arizona...
Isolated dry thunderstorm threat was expanded into northwestern
Arizona for Tuesday. Deeper monsoon moisture will remain south of
the Mogollon Rim Tuesday with a mix of wet and dry thunderstorms
expected in the afternoon. Fuels remain dry with potential dry
lightning ignitions away from heavier precipitation cores.

..Williams.. 06/30/2025

.PREV DISCUSSION... /ISSUED 0221 AM CDT Mon Jun 30 2025/

...Synopsis...
Mid-level flow across the CONUS should continue to amplify as the
sub-tropical ridge over the West gradually shifts eastward. The
upper low across the West Coast will intensify, spreading enhanced
flow aloft and monsoon moisture over much of the West. The increased
moisture will support dry thunderstorms over the Northwest and UT,
while warm and breezy conditions will favor elevated fire-weather
conditions over the Great Basin.

...Central Great Basin...
As the upper low over the West intensifies, enhanced mid-level flow
will overspread parts of the Great Basin and Southwest. On the
periphery of the building upper ridge, very warm and dry conditions
are likely. The stronger southerly mid-level flow over top the
dry/well-mixed boundary layer will support gusty southerly winds
across central/southern NV Tuesday. Widespread gusts of 15-25 mph
are expected, with RH values below 15%. As area fuels continuing to
dry, elevated to locally critical fire-weather conditions are
likely.

...Dry Thunderstorms...
A second day of thunderstorms is expected from northern CA into
southern OR and western ID Tuesday. Weak ascent from the upper low,
coupled with northward moving monsoon moisture will support
scattered storms through much of the day. Increased storm motions
and, steep low-level lapse rates will still favor relatively poor
precipitation efficiency. This suggests dry lighting is again
possible across the northern Coastal ranges of CA, east of the
Cascades to the OR/ID border.

Across parts of UT, the initial influx of deeper monsoon moisture
from the upper-level trough into the Intermountain West will support
isolated thunderstorms across the central mountains Tuesday. With
PWAT values of 0.7-0.8 inches and modest storm speeds, a mixed mode
of wet and dry storms is expected over the higher terrain. Very
receptive fuels (ERCs > 90th percentile), suggest dry lightning
ignitions are possible outside the heavier precip core.

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

$$