Fire Weather Outlook Discussion
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FNUS22 KWNS 220726
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0226 AM CDT Sun Oct 22 2017

Valid 231200Z - 241200Z

...CRITICAL FIRE WEATHER AREA FOR COASTAL RANGES OF SOUTHERN
CALIFORNIA...

...Synopsis...
Expansive high pressure will persist across the Intermountain West,
with a 1041mb high centered over Idaho late in the forecast period.
To the east of this anticyclone, a strong surface low near the Great
Lakes will set up a favorable surface pressure gradient for gusty
winds in portions of the northern and central Plains.  Southwest of
the high, a persistent "offshore" pressure gradient will foster
gusty winds and heightened fire weather concerns in portions of
southern California.

...Coastal Ranges of southern California...
The overall fire weather scenario will change very little compared
to previous days.  The aforementioned surface pressure gradient
across the area will support widespread 15-25 mph surface winds,
with gusts exceeding 40 mph especially near terrain-favored areas.
Hot surface temperatures will occur during peak-heating hours, with
90s to near 100F expected amidst 7-12% surface RH values.
Widespread elevated to critical fire weather conditions are likely,
with at least elevated conditions persisting well into the overnight
hours due to continued gusty winds and poor recovery.

...Portions of the High Plains from southeastern Montana to western
Nebraska...
Although surface temperatures will be relatively cool during
peak-heating hours (50s F), 25-35 mph northwesterly flow (with
higher gusts) will develop during the afternoon in response to the
aforementioned surface pressure gradient across the region.  RH
values will remain mostly above critical thresholds and range from
22-28%.  These conditions are consistent with elevated fire weather
criteria and an attendant delineation has been made.

..Cook.. 10/22/2017

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

$$



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