FNUS28 KWNS 272124

Day 3-8 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0422 PM CDT Mon Sep 27 2021

Valid 291200Z - 051200Z

The upper-level trough currently shifting into the western U.S. is
expected to de-amplify and stall along the Rockies through the late
week period. Surface high pressure over the Great Basin in the wake
of this trough will yield relatively weak winds for the interior
West, but support offshore winds and fire weather concerns along the
southern California coast. Elsewhere, rain chances across the
Pacific Northwest and Great Plains will limit additional fire
weather concerns. 

...D3/Wednesday to D4/Thursday - Southern California Coast...
Medium and long-range guidance show reasonably good agreement in the
evolution and placement of the upper-level wave through the Four
Corners and into northern Mexico by the D3/Wed to D4/Thur time
frame. This will favor north to northeasterly flow aloft over
southern CA, while an offshore pressure gradient supports
east/northeast winds at the surface. Deterministic solutions are not
overly bullish on wind speeds (likely due to generally weak flow
aloft), but this synoptic pattern typically favors elevated to
critical downslope winds within the coastal hills and mountains. The
strongest pressure gradient is expected early D4/Thur, and fine
fuels should be sufficiently cured by that point to support at least
low-end probabilities.

..Moore.. 09/27/2021

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