738  
WWUS86 KSTO 241846  
RFWSTO  
 
URGENT - FIRE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
1146 AM PDT MON SEP 24 2018  
   
..RED FLAG WARNING THROUGH TUESDAY AFTERNOON
 
 
.BREEZY NORTHERLY WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON  
ACROSS PARTS OF NORTHERN CALIFORNIA. POOR OVERNIGHT HUMIDITY  
RECOVERY AND LOWERING DAYTIME RH WILL ALSO PRODUCE CRITICAL FIRE  
WEATHER CONDITIONS. THE STRONGEST WINDS WILL BE OVER THE HIGHER  
ELEVATIONS OF THE COAST RANGE AND SIERRA AND ALSO THE NORTHERN  
SACRAMENTO VALLEY.  
 
CAZ213-215>217-221-263-264-266>269-279-251400-  
/O.CON.KSTO.FW.W.0008.000000T0000Z-180926T0000Z/  
EASTERN PORTION OF SHASTA/TRINITY NF-  
NORTHERN SACRAMENTO VALLEY TO SOUTHERN TEHAMA COUNTY LINE BELOW  
1000 FT-  
CENTRAL SACRAMENTO VALLEY IN GLENN, COLUSA, YUBA, NORTHERN  
SUTTER, AND BUTTE COUNTY BELOW 1000 FT-  
SOUTHERN SACRAMENTO VALLEY IN YOLO-  
SACRAMENTO FAR WESTERN PLACER, SOUTHERN SUTTER AND SOLANO COUNTY  
BELOW 1000 FT-STANISLAUS NF WEST OF THE SIERRA CREST-  
SOUTHEAST EDGE SHASTA-TRINITY NF AND WESTERN PORTIONS OF TEHAMA-  
GLENN UNIT-LAKE COUNTY PORTION OF LAKE-NAPA-SONOMA UNIT-  
NORTHERN SIERRA FOOTHILLS FROM 1000 TO 3000 FT. INCLUDES PORTIONS  
OF SHASTA-TRINITY AND BUTTE UNITS-  
NORTHERN MOTHERLODE FROM 1000 TO 3000 FT. INCLUDES PORTIONS OF  
NEVADA-YUBA-PLACER-AMADOR AND ELDORADO UNITS-  
NORTHERN SIERRA INCLUDING LASSEN NP AND PLUMAS AND LASSEN NF/S  
WEST OF THE SIERRA CREST (WEST OF EVANS PEAK-GRIZZLY PEAK-  
BECKWORTH PEAK)-  
NORTHERN SIERRA INCLUDING THE TAHOE AND ELDORADO NF/S WEST OF THE  
SIERRA CREST-EASTERN MENDOCINO NF-  
1146 AM PDT MON SEP 24 2018  
 
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY FOR  
BREEZY NORTH WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213,  
215, 216, 217, 221, 263, 264, 266, 267, 268, 269, AND 279...  
 
* WIND...NORTHWEST TO NORTHEAST WIND 10 TO 15 MPH WITH GUSTS TO 30  
MPH. STRONGEST WINDS EXPECTED IN THE OVERNIGHT AND EARLY MORNING  
HOURS.  
 
* HUMIDITY...OVERNIGHT HUMIDITY RECOVERIES AS LOW AS 25 TO 35  
PERCENT, LOCALLY LOWER, ESPECIALLY TUESDAY MORNING. DAYTIME  
MINIMUM HUMIDITIES 10 TO 20 PERCENT. SINGLE DIGITS POSSIBLE  
IN THE NORTHERN SACRAMENTO VALLEY.  
 
* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.  
OUTDOOR BURNING IS NOT RECOMMENDED.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  
ARE EITHER OCCURRING NOW, OR WILL SHORTLY. A COMBINATION OF  
STRONG WINDS, LOW RELATIVE HUMIDITY, AND WARM TEMPERATURES CAN  
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.  
 

 
 
INTERACT WITH US VIA SOCIAL MEDIA  
WWW.FACEBOOK.COM/NWS.SACRAMENTO  
WWW.TWITTER.COM/NWSSACRAMENTO  
 

 
 
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