658  
FNUS76 KMTR 042249  
FWSMTR  
 
SPOT FORECAST FOR LAKE SONOMA RX...CALFIRE SONOMA-LAKE-NAPA-LNU  
NATIONAL WEATHER SERVICE SAN FRANCISCO CA  
349 PM PDT THU JUN 4 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 1600 PDT ON JUNE 04.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION  
FULL SUNSHINE FORECAST FRIDAY WITH AFTERNOON RH VALUES  
BETWEEN 20-30 PERCENT. LIGHT WINDS IN THE MORNING WILL BECOME  
NORTHWESTERLY WITH AFTERNOON GUSTS 15-20 MPH. MODERATE TO GOOD  
RH RECOVERY FRIDAY NIGHT INTO SATURDAY. SEASONABLY COOL AND BREEZY  
THIS WEEKEND WITH A SLIGHT CHANCE OF LIGHT RAIN BY MONDAY AS AN  
UNSEASONABLY STRONG LATE SEASON STORM MOVES INTO NORTHERN CALIFORNIA.  
 
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....55-59.  
MAX HUMIDITY........63-67 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 10 TO 12 MPH WITH GUSTS TO  
AROUND 18 MPH.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 12 MPH.  
MARINE LAYER........NONE.  
   
FRIDAY  
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....88-92.  
MIN HUMIDITY........24-28 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 8 TO 15 MPH WITH GUSTS TO  
AROUND 21 MPH AFTER 1300 HOURS.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
MIXING HEIGHT.......3300 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 14 MPH.  
MARINE LAYER........NONE.  
 
 
FORECASTER...R_WALBRUN  
REQUESTED BY...MARSHALL TURBEVILLE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2614734.3/MTR  
.DELDT 06/04/26  
.FORMATTERVERSION 2.0.0  
.EMAIL MARSHALL.TURBEVILLE@FIRE.CA.GOV  
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