323  
FNUS21 KWNS 220725  
FWDDY1  
 
DAY 1 FIRE WEATHER OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
0224 AM CDT SUN OCT 22 2017  
 
VALID 221200Z - 231200Z  
 
...CRITICAL FIRE WEATHER AREA FOR COASTAL RANGES OF SOUTHERN  
CALIFORNIA...  
   
..SYNOPSIS
 
 
THE PRIMARY SYNOPTIC FEATURES OF INTEREST ARE 1) AN EXPANSIVE AREA  
OF HIGH PRESSURE IN THE GREAT BASIN AN INTERMOUNTAIN WEST AND 2) A  
WEAK SURFACE TROUGH ALONG THE CALIFORNIA COAST. A SYNOPTICALLY  
EVIDENT FIRE WEATHER SCENARIO WILL EVOLVE THROUGHOUT THE FORECAST  
PERIOD AS THE SURFACE PRESSURE GRADIENT BETWEEN THESE TWO SYSTEMS  
FOSTERS STRONG, DRY OFFSHORE FLOW ACROSS PARTS OF SOUTHERN  
CALIFORNIA.  
   
..COASTAL RANGES OF SOUTHERN CALIFORNIA
 
 
AN EXTENDED PERIOD OF GUSTY NORTH TO NORTHEASTERLY LOW-LEVEL FLOW  
WILL PERSIST THROUGHOUT THE DAY ACROSS THE DELINEATED FIRE WEATHER  
THREAT AREAS. 15-25 MPH SURFACE WINDS (WITH GUSTS TO 50 MPH IN  
TERRAIN-FAVORED AREAS) WILL PERSIST THROUGHOUT THE DAY. DAYTIME  
HEATING WILL AID IN INCREASINGLY WARM SURFACE TEMPERATURES (PERHAPS  
RISING INTO THE LOW 90S) ALONG WITH RH VALUES FALLING TO AROUND  
10-15%. AT LEAST ELEVATED FIRE WEATHER CONDITIONS WILL PERSIST INTO  
THE OVERNIGHT HOURS DUE TO PERSISTENTLY GUSTY WINDS AND POOR  
OVERNIGHT RECOVERY.  
 
..COOK.. 10/22/2017  
   
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
 
 

 
 
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