743  
WWUS86 KLOX 171123  
RFWLOX  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING IN EFFECT FOR MUCH OF LOS ANGELES AND VENTURA  
COUNTIES THROUGH THIS EVENING...  
   
DISCUSSION
 
THE WINDS HAVE SIGNIFICANTLY SUBSIDED ACROSS SANTA  
BARBARA COUNTY AND WESTERN VENTURA COUNTY.  
 
FOR THE REMAINDER OF VENTURA AND LOS ANGELES COUNTIES, THE SANTA  
ANA WINDS ARE EXPECTED TO BEGIN THIS EVENING, THEN PEAK OVERNIGHT  
INTO SUNDAY WHEN GUSTS BETWEEN 35 AND 55 MPH WILL BE LIKELY. A RED  
FLAG WARNING IS IN EFFECT FOR TONIGHT THROUGH SUNDAY EVENING FOR  
MUCH OF LOS ANGELES AND VENTURA COUNTIES.  
 
CAZ239-252-171230-  
/O.EXP.KLOX.FW.W.0010.000000T0000Z-171217T1100Z/  
SANTA BARBARA COUNTY SOUTH COAST-SANTA BARBARA COUNTY MOUNTAINS-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE  
HUMIDITY FOR SANTA BARBARA COUNTY AND WESTERN VENTURA COUNTY...  
 
THE WINDS HAVE SIGNIFICANTLY SUBSIDED AND WILL NOT RETURN THROUGH  
AT LEAST WEDNESDAY EVENING. MINIMUM VALUES WILL RANGE FROM 15 TO  
25 PERCENT.  
 

 
 
CAZ246-253-254-171930-  
/O.CON.KLOX.FW.W.0011.000000T0000Z-171218T0400Z/  
SANTA MONICA MOUNTAINS RECREATIONAL AREA-  
VENTURA COUNTY MOUNTAINS / LOS PADRES NATIONAL FOREST-  
LOS ANGELES COUNTY MOUNTAINS / ANGELES NATIONAL FOREST-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING  
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE MOUNTAINS  
OF LOS ANGELES AND VENTURA COUNTIES...  
 
* WINDS...NORTHEAST WINDS 25 TO 40 MPH WITH GUSTS TO 60 MPH WILL  
CONTINUE INTO THE AFTERNOON.  
 
* RELATIVE HUMIDITY...HUMIDITIES WILL LOWER TO 10 TO 15 PERCENT TODAY.  
 
* IMPACTS...THERE WILL BE THE POTENTIAL FOR VERY RAPID SPREAD OF  
WILDFIRE, LONG RANGE SPOTTING, AND EXTREME FIRE BEHAVIOR THAT  
COULD LEAD TO A THREAT TO LIFE AND PROPERTY. USE EXTREME CAUTION  
WITH POTENTIAL FIRE IGNITION SOURCES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EXPECTED. A COMBINATION OF STRONG WINDS...LOW RELATIVE  
HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR. USE EXTREME CAUTION WHEN USING POTENTIAL FIRE IGNITION  
SOURCES.  
 

 
 

 
 
CAZ244-245-288-171930-  
/O.CON.KLOX.FW.W.0011.000000T0000Z-171218T0400Z/  
VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-  
SANTA CLARITA VALLEY-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING  
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS  
AND SANTA CLARITA VALLEY...  
 
* WINDS...NORTHEAST WINDS FROM 20 TO 30 MPH WITH GUSTS TO 50 MPH  
WILL CONTINUE INTO THE AFTERNOON.  
 
* RELATIVE HUMIDITY...HUMIDITIES WILL FALL FROM 15 TO 25 PERCENT  
EARLY THIS MORNING TO 10 TO 15 PERCENT.  
 
* IMPACTS...IF FIRE IGNITION OCCURS, THERE WILL BE THE POTENTIAL  
FOR VERY RAPID SPREAD OF WILDFIRE, LONG RANGE SPOTTING, AND  
EXTREME FIRE BEHAVIOR THAT COULD LEAD TO A THREAT TO LIFE AND  
PROPERTY. USE EXTREME CAUTION WITH POTENTIAL FIRE IGNITION  
SOURCES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EXPECTED. A COMBINATION OF STRONG WINDS...LOW RELATIVE  
HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR. USE EXTREME CAUTION WHEN USING POTENTIAL FIRE IGNITION  
SOURCES.  
 

 
 

 
 
CAZ547-171930-  
/O.CON.KLOX.FW.W.0011.000000T0000Z-171218T0400Z/  
LOS ANGELES COUNTY SAN FERNANDO VALLEY-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING  
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN FERNANDO VALLEY...  
 
* WINDS...NORTH TO NORTHEAST WINDS 15 TO 30 MPH WITH GUSTS TO 45  
MPH WILL CONTINUE INTO THE AFTERNOON. STRONGEST WINDS NORTHERN  
AND WESTERN PORTIONS.  
 
* RELATIVE HUMIDITY...HUMIDITIES 15 TO 25 PERCENT EARLY THIS  
MORNING WILL LOWER TO 10 TO 15 PERCENT.  
 
* IMPACTS...IF FIRE IGNITION OCCURS, THERE WILL BE THE POTENTIAL  
FOR VERY RAPID SPREAD OF WILDFIRE, LONG RANGE SPOTTING, AND  
EXTREME FIRE BEHAVIOR THAT COULD LEAD TO A THREAT TO LIFE AND  
PROPERTY. USE EXTREME CAUTION WITH POTENTIAL FIRE IGNITION  
SOURCES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EXPECTED. A COMBINATION OF STRONG WINDS...LOW RELATIVE  
HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR. USE EXTREME CAUTION WHEN USING POTENTIAL FIRE IGNITION  
SOURCES.  
 

 
 

 
 
CAZ240-241-171930-  
/O.CON.KLOX.FW.W.0011.000000T0000Z-171218T0400Z/  
VENTURA COUNTY COAST-  
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING  
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COAST AND LOS  
ANGELES COAST FROM MALIBU TO HOLLYWOOD HILLS...  
 
* WINDS...NORTH TO NORTHEAST WINDS 15 TO 30 MPH WITH GUSTS 35 TO  
45 MPH WILL CONTINUE INTO THE AFTERNOON. STRONGEST WINDS ACROSS  
THE VENTURA COUNTY COASTAL PLAIN AND MALIBU TO HOLLYWOOD HILLS.  
 
* RELATIVE HUMIDITY...HUMIDITIES 15 TO 25 PERCENT EARLY THIS  
MORNING WILL LOWER TO 10 TO 15 PERCENT.  
 
* IMPACTS...IF FIRE IGNITION OCCURS, THERE WILL BE THE POTENTIAL  
FOR VERY RAPID SPREAD OF WILDFIRE, LONG RANGE SPOTTING, AND  
EXTREME FIRE BEHAVIOR THAT COULD LEAD TO A THREAT TO LIFE AND  
PROPERTY. USE EXTREME CAUTION WITH POTENTIAL FIRE IGNITION  
SOURCES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EXPECTED. A COMBINATION OF STRONG WINDS...LOW RELATIVE  
HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR. USE EXTREME CAUTION WHEN USING POTENTIAL FIRE IGNITION  
SOURCES.  
 

 
 

 
 
CAZ548-171930-  
/O.CON.KLOX.FW.W.0010.000000T0000Z-171218T0400Z/  
LOS ANGELES COUNTY SAN GABRIEL VALLEY-  
323 AM PST SUN DEC 17 2017  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING  
FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FOOTHILLS OF THE SAN  
GABRIEL VALLEY...  
 
* WINDS...AREAS OF NORTHEAST WINDS 15 TO 25 MPH WITH GUSTS TO 35  
MPH IN THE FOOTHILLS.  
 
* RELATIVE HUMIDITY...HUMIDITIES 15 TO 25 PERCENT EARLY THIS  
MORNING WILL LOWER TO 10 TO 15 PERCENT.  
 
* IMPACTS...IF FIRE IGNITION OCCURS, THERE WILL BE THE POTENTIAL  
FOR VERY RAPID SPREAD OF WILDFIRE, LONG RANGE SPOTTING, AND  
EXTREME FIRE BEHAVIOR THAT COULD LEAD TO A THREAT TO LIFE AND  
PROPERTY. USE EXTREME CAUTION WITH POTENTIAL FIRE IGNITION  
SOURCES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EXPECTED. A COMBINATION OF GUSTY WINDS...LOW RELATIVE  
HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE  
BEHAVIOR. USE EXTREME CAUTION WHEN USING POTENTIAL FIRE IGNITION  
SOURCES.  
 

 
 

 
 
ASR  
 
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