403  
FNUS76 KMTR 040817  
FWSMTR  
 
SPOT FORECAST FOR LAKE SONOMA RX...CAL FIRE  
NATIONAL WEATHER SERVICE SAN FRANCISCO CA  
117 AM PDT THU JUN 4 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON JUNE 04.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
A STRONG HIGH PRESSURE SYSTEM WITH ABOVE NORMAL  
TEMPERATURES AND DRY CONDITIONS WILL CONTINUE THROUGH FRIDAY. THE  
HIGH PRESSURE SYSTEM WILL WEAKEN OVER THE WEEKEND.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....87-91.  
MIN HUMIDITY........28-32 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
MIXING HEIGHT.......3000 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 10 TO 20 MPH, AFTERNOON GUSTS TO 25 MPH.  
MARINE LAYER........NONE.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
MIN TEMPERATURE.....55-59.  
MAX HUMIDITY........61-65 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 12 TO 13 MPH. GUSTS UP TO 21  
MPH IN THE EVENING.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.  
MARINE LAYER........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....88-92.  
MIN HUMIDITY........24-28 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 9 TO 14 MPH. GUSTS UP TO 25 MPH  
IN THE AFTERNOON.  
CWR.................0 PERCENT.  
CHANCE OF THUNDER...0 PERCENT.  
MIXING HEIGHT.......3000 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH, AFTERNOON GUSTS TO 30 MPH.  
MARINE LAYER........NONE.  
 

 
FORECASTER...R_CANEPA  
REQUESTED BY...MARSHALL TURBEVILLE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2614734.2/MTR  
.DELDT 06/04/26  
.FORMATTERVERSION 2.0.0  
.EMAIL MARSHALL.TURBEVILLE@FIRE.CA.GOV  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab CA Page Main Text Page