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Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0202 AM CDT Fri Jul 22 2022

Valid 221200Z - 231200Z

...CRITICAL FIRE WEATHER AREA FOR PARTS OF THE SNAKE RIVER PLAIN...

...Synopsis...
A midlevel shortwave trough and enhanced west-southwesterly flow
aloft will track eastward across the Northern Great Basin into the
northern Rockies during peak heating, while a secondary shortwave
impulse crosses the Sierra late in the period. 

...Northern Great Basin into the central/northern Rockies...
As the strong/deep west-southwesterly flow overspreads portions of
the Northern Great Basin, deep boundary-layer mixing will result in
single-digit to lower teens RH amid breezy westerly surface winds.
The best overlap of strong winds and low RH is expected along
portions of the Snake River Plain -- where 20-25 mph sustained
westerly surface winds (with higher gusts) will overspread
critically dry fuels. Therefore, Critical highlights have been
maintained over this area. 

Farther west in the lee of the Sierra, dry/breezy conditions will be
possible as modest west-southwesterly flow preceding the second
midlevel impulse crosses the area. However, these conditions appear
too brief/localized for highlights. 

...Parts of Southern California...
Enhanced onshore flow peripheral to the midlevel trough will result
in warming/drying over parts of inland southern California -- where
widespread single-digit to lower teens RH is expected. These dry
conditions, coupled with breezy/terrain-enhanced surface winds, will
support locally enhanced fire-weather conditions along the I-5
corridor. Highlights have been withheld owing to the localized
nature of the fire-weather threat.

..Weinman.. 07/22/2022

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