965
FNUS76 KMTR 010317
FWSMTR

Spot Forecast for Angel Island Prescribed Burn...California State Parks
National Weather Service San Francisco CA
817 PM PDT Fri Oct 31 2025

Forecast is based on ignition time of 0800 PDT on November 01.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Conditions in the burn window will be characterized
by morning southeasterly winds becoming southwesterly by 1300 PDT
and westerly by 1600 PDT. Wind gusts are forecast to approach 10
mph around 1300 PDT and will average between 9 and 11 mph through
the afternoon. ***With the Rx burn location across the higher terrain
of Angel Island, these higher wind speeds/gusts are more
probable.*** The humidity trend will be such that values fall below
80% after noon with minimum RH values falling to around 65% by
1600 PDT. RH is forecast to rebound above 80% by 2000 PDT when
winds dip below 10 mph. Shallow mixing heights of around 500 ft AGL may
translate to poor dispersion and ventilation.

.SATURDAY...

Sky/weather.........Mostly sunny then becoming clear then becoming
                    partly cloudy.
Min temperature.....53-57.
Max humidity........92-96 percent.
Wind (20 ft)........Southeast winds around 5 mph shifting to the
                    southwest 5 to 11 mph in the afternoon and
                    evening, then becoming light overnight.
CWR.................0 percent.
Chance of thunder...0 percent.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 4 to 10 mph.
Marine layer........None.

.SUNDAY...

Sky/weather.........Mostly sunny. Patchy fog in the morning.
Max temperature.....70-74.
Min humidity........64-68 percent.
Wind (20 ft)........Light winds becoming west 5 to 6 mph in the
                    afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.
Mixing height.......500 ft AGL.
Transport winds.....West around 5 mph.
Marine layer........None.

.SUNDAY NIGHT...

Sky/weather.........Mostly clear.
Min temperature.....51-55.
Max humidity........91-95 percent.
Wind (20 ft)........West winds around 5 mph in the evening becoming
                    light.
CWR.................0 percent.
Chance of thunder...0 percent.
Mixing height.......400 ft AGL.
Transport winds.....West around 9 mph.
Marine layer........None.

$$
Forecaster...L_BAIN
Requested by...Naftali Moed
Type of request...PRESCRIBED
.TAG 2524867.0/MTR
.DELDT 10/31/25
.FormatterVersion 2.0.0
.EMAIL Naftali.Moed@parks.ca.gov