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Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0159 AM CDT Wed Aug 03 2022

Valid 031200Z - 041200Z

...CRITICAL FIRE WEATHER AREA FOR NORTH-CENTRAL MONTANA...

...Synopsis...
An expansive large-scale ridge will be centered over the Great
Basin, while a belt of moderate midlevel westerly flow extends from
the Pacific Northwest into the northern Rockies/adjacent High Plains
along the northern periphery of the ridge. Within the westerly
midlevel flow, a shortwave trough will track east-southeastward into
the Pacific Northwest, while an attendant surface low deepens over
southern AB. 

...Northern Rockies and adjacent High Plains...
Deep boundary-layer mixing and downslope flow from the northern
Rockies into the adjacent High Plains will result in 10-15 percent
minimum RH during the afternoon. At the same time, the tightening
surface pressure gradient along the southern periphery of the
surface low will support 20-25 mph sustained westerly surface winds
over parts of north-central MT -- where Critical highlights remain
in place. 

...Pacific Northwest...
The enhanced westerly flow will lead to warming/drying in the lee of
the Cascades from northern WA into central OR. Sustained westerly
surface winds of 15-20 mph amid 10-15 percent RH will yield elevated
to locally critical fire-weather conditions. 

...Dry Thunderstorms...
Along the northern periphery of the monsoonal moisture plume,
diurnal heating and orographic circulations along the higher terrain
in OR into northern CA will support isolated high-based thunderstorm
development. While many of these storms may be a mixed wet-dry mode
(0.75-1.0 in PW), lightning strikes on the periphery of
precipitation cores could lead to new fire starts given receptive
fuels over the area. Additionally, adequate deep-layer shear could
support a few loosely organized storms capable of strong/erratic
outflow winds.

..Weinman.. 08/03/2022

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