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Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
1047 AM CDT Sat Sep 10 2022

Valid 101700Z - 111200Z

Offshore flow across the Pacific Northwest should continue to weaken
through the day as the surface pressure diffuses further. Elevated
highlights have been maintained as a widespread, very dry low-level
airmass remains in place, atop critically dry fuels. Despite a
large-scale weaker surface wind field, at least locally stronger
winds should persist in terrain-favoring areas with boundary-layer
heating/mixing. Otherwise, locally Elevated conditions may still
occur later this afternoon east of the Cascades into the Snake River
Plain from eastern Oregon into southern Idaho.

..Squitieri.. 09/10/2022

.PREV DISCUSSION... /ISSUED 0147 AM CDT Sat Sep 10 2022/

...Synopsis...
A large-scale trough will move slowly eastward from the northern
Plains into the Upper MS Valley, while a mid/upper-level ridge
builds over the western CONUS. Subsidence on the backside of the
trough will reinforce an expansive area of high pressure over the
northern and central Rockies, while surface low pressure gradually
weakens off the Pacific Northwest coast. 

...Northwest...
Between the surface low off the Pacific Northwest coast and high
pressure over the northern/central Rockies, an enhanced surface
pressure gradient will support breezy easterly surface winds across
parts of the Northwest. Along and west of the Cascades, 15-20 mph
sustained surface winds coupled with 15-25 percent RH will lead to
elevated fire-weather conditions, given receptive fuels over the
area. The strongest winds are expected through the Cascade gaps
early in the period, before the regional pressure gradient weakens
during the late afternoon/early evening hours. While locally
critical conditions will be possible primarily over terrain-favored
areas along the Cascades, these conditions appear too localized for
Critical highlights at this time. 

East of the Cascades, locally elevated conditions will be possible
in the Columbia Basin and through the Snake River Plain, though a
limited overlap of breezy surface winds and low RH precludes
highlights for these areas.

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