FNUS76 KMTR 201836

FWSMTR



Spot Forecast for Mt. Washington Rx...LOCAL

National Weather Service San Francisco CA

1136 AM PDT Sat Jun 20 2026



Forecast is based on ignition time of 0700 PDT on June 22. 

If conditions become unrepresentative, contact the National Weather

Service.



.DISCUSSION...Building high pressure will lead to a warming and drying trend 

at the burn site next week.  A marine layer will be compressed and remain in

Sonoma valley.  Winds will be diurnally driven, light at night and morning and 

southwesterly each afternoon.



.MONDAY...



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

Max temperature.....85-89. 

Min humidity........40-45 percent. 

Wind (20 ft)........Light and less than 5 mph in the morning becoming

                    southwest winds 4 to 8 mph. 

CWR.................0 percent. 

Chance of thunder...0 percent. 

Mixing height.......2500 ft AGL. 

Transport winds.....Southwest around 6 mph. 

Marine layer........none. 



.MONDAY NIGHT...



Sky/weather.........Clear then becoming partly cloudy. Patchy fog 

                    overnight. 

Min temperature.....50-54. 

Max humidity........90-100 percent. 

Wind (20 ft)........Southwest winds 6 to 8 mph in the evening 

                    becoming light less than 5 mph. 

CWR.................0 percent. 

Chance of thunder...0 percent. 

Mixing height.......400 ft AGL. 

Transport winds.....West around 8 mph. 

Marine layer........none. 



.TUESDAY...



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

Max temperature.....85-90. 

Min humidity........35-40 percent. 

Wind (20 ft)........Light winds becoming southwest 4 to 8 mph in 

                    the afternoon. 

CWR.................0 percent. 

Chance of thunder...0 percent. 

Mixing height.......2200 ft AGL. 

Transport winds.....Southwest around 6 mph. 

Marine layer........none. 



$$

Forecaster...M_MEHLE

Requested by...Jason Tamagni

Type of request...PRESCRIBED

.TAG 2615810.0/MTR

.DELDT 06/20/26

.FormatterVersion 2.0.0

.EMAIL jtamagni@calistogaca.gov