FNUS76 KMTR 271135

FWSMTR



Spot Forecast for Ralston Rx...CAL FIRE

National Weather Service San Francisco CA

435 AM PDT Mon Oct 27 2025



Forecast is based on ignition time of 0900 PDT on October 28. 

If conditions become unrepresentative, contact the National Weather

Service.



.DISCUSSION...Gentle offshore NE winds will bring warm and dry

conditions to the burn site Tuesday. The relative humidity will

drop from low 70s in the morning to mid 30s in the afternoon. An 

inversion will persist through the day, suppressing fire behavior 

and limiting vertical smoke dispersion.



.TUESDAY...



Sky/weather.........Sunny. 

Max temperature.....71-75. 

Min humidity........36-40 percent. 

Wind (20 ft)........Northeast winds 7 to 10 mph. 

Mixing height.......1400 ft AGL. 

Transport winds.....Northeast around 8 mph. 

Marine layer........None. 



.TUESDAY NIGHT...



Sky/weather.........Clear. 

Min temperature.....52-56. 

Max humidity........72-76 percent. 

Wind (20 ft)........Northwest winds 7 to 13 mph. 

Mixing height.......300 ft AGL. 

Transport winds.....North around 8 mph. 

Marine layer........1000ft. 



.WEDNESDAY...



Sky/weather.........Sunny. 

Max temperature.....74-78. 

Min humidity........46-50 percent. 

Wind (20 ft)........North winds 7 to 12 mph. 

Mixing height.......1300 ft AGL. 

Transport winds.....North around 9 mph. 

Marine layer........1000 ft. 



$$

Forecaster...D_FLYNN

Requested by...Sarah Collamer

Type of request...PRESCRIBED

.TAG 2524441.0/MTR

.DELDT 10/27/25

.FormatterVersion 2.0.0

.EMAIL sarah.collamer@fire.ca.gov