693
FNUS22 KWNS 201914
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0213 PM CDT Mon Jul 20 2026

Valid 211200Z - 221200Z

Minor modifications were made to the IsoDryT area based on the
latest observations and high-resolution forecast guidance.
Southern/central Oregon remain the mostly likely area for mixed
wet/dry thunderstorm development. Cloud cover, smoke, and warmer
temperatures aloft will help limit thunderstorm development/coverage
across the IsoDryT area, but isolated thunderstorms remain possible
if not likely. Additionally, if the upper low off the coast shifts
farther east in the next 24-36 hours, this will help increase
thunderstorm probabilities and coverage, including overnight.

Locally elevated conditions are likely in portions of South Carolina
as south-southwest sustained winds of 10-15 mph overlap minimum RH
of 30-40%. ERCs generally range from the 80th-95th percentile across
this area.

..Nauslar.. 07/20/2026

.PREV DISCUSSION... /ISSUED 0149 AM CDT Mon Jul 20 2026/

...Synopsis...
Along the northwestern periphery of a large-scale ridge encompassing
much of the central and western CONUS, ample midlevel moisture will
be in place atop a warm and dry air mass across parts of northern CA
into OR. This will yield inverted-V profiles with weak (albeit
sufficient) buoyancy for isolated high-based thunderstorms across
the area during the afternoon and evening hours. Given relatively
weak large-scale forcing for ascent, the greatest confidence in
thunderstorm development is over the Cascades in southern/central
OR. While 0.8 to 1.2 inch PW may promote a mix of wet/dry storms,
relatively fast storm motions and the dry boundary layer should
limit rainfall. As a result, isolated lightning-induced ignitions
will be possible. Elsewhere across the CONUS, minimal fire-weather
concerns are expected.

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

$$