Fire Weather Outlook Discussion
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000
FNUS22 KWNS 211842
FWDDY2

Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0141 PM CDT Sat Oct 21 2017

Valid 221200Z - 231200Z

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

No changes are needed to the ongoing forecast for critical fire
weather conditions across the coastal ranges of southern California
on Sunday (see previous discussion below for more details).

..Jirak.. 10/21/2017

.PREV DISCUSSION... /ISSUED 0133 AM CDT Sat Oct 21 2017/

...Synopsis...
The primary synoptic-scale features of interest for the D2/Sun
forecast period are 1) a large area of high pressure over the Great
Basin/northern Rockies and 2) a weak surface trough along the
California Coast.  The pressure gradient between these two systems
will foster gusty winds in portions of southwestern California along
with widespread areas of elevated to critical fire weather
conditions.

...Coastal Ranges of Southern California...
The aforementioned surface pressure gradient across the region will
foster an extended period of gusty northeasterly low-level flow
across the elevated and critical areas, with gusts from 35-50 mph
occurring especially near terrain-favored canyons and valleys.
During peak heating hours, surface temperatures will rise into the
low 90s as RH values fall to around 10-12% - consistent with
critical fire weather thresholds.  At least elevated fire weather
conditions will persist overnight and into early Monday in response
to continued gusty winds and poor relative humidity recovery.

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

$$



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