


Spot Forecast
Issued by NWS San Francisco Bay Area, CA
Issued by NWS San Francisco Bay Area, CA
576 FNUS76 KMTR 220138 FWSMTR Spot Forecast for Watson...Cal Fire National Weather Service San Francisco CA 638 PM PDT Thu Aug 21 2025 Forecast is based on forecast start time of 0800 PDT on August 22. If conditions become unrepresentative, contact the National Weather Service. ...HEAT ADVISORY IN EFFECT UNTIL 9 PM PDT SATURDAY... .DISCUSSION...Hot and dry conditions continue at the incident site through the weekend. Breezy northwest winds are expected to develop each afternoon and evening. Complex terrain near the incident site may impact wind direction, especially when winds become light and variable overnight. Poor to fair daytime humidity retention continues through the week. A cooling trend early next week will bring improving overnight humidity recoveries to the incident site. .FRIDAY... Sky/weather.........Sunny. Max temperature.....97-101. Min humidity........20-25 percent. Wind (20 ft)........Northwest winds 5 to 13 mph. CWR.................1 percent. Chance of thunder...2 percent. Mixing height.......3300 ft AGL. Transport winds.....West around 7 mph. Marine layer........None. .FRIDAY NIGHT... Sky/weather.........Partly cloudy. Min temperature.....59-63, possibly warmer in the thermal belts. Max humidity........70-80 percent, possibly drier in the thermal belts. Wind (20 ft)........West winds 8 to 12 mph in the evening becoming light and variable overnight. CWR.................1 percent. Chance of thunder...0 percent. Mixing height.......800 ft AGL. Transport winds.....Northwest around 5 mph. Marine layer........None. .SATURDAY... Sky/weather.........Mostly sunny. Max temperature.....93-97. Min humidity........25-30 percent. Wind (20 ft)........Northwest winds 5 to 7 mph shifting to the southwest 6 to 14 mph in the afternoon. CWR.................2 percent. Chance of thunder...0 percent. Mixing height.......3000 ft AGL. Transport winds.....Southwest around 7 mph. Marine layer........None. $$ Forecaster...D_HOANG Requested by...SCU ECC Type of request...WILDFIRE .TAG 2520424.0/MTR .DELDT 08/21/25 .FormatterVersion 2.0.0 .EMAIL john.corona@fire.ca.gov