854
FNUS76 KMTR 221227
FWSMTR

Spot Forecast for Castle Hill Pile Burn...Contra Costa County Fire Protection District
National Weather Service San Francisco CA
527 AM PDT Wed May 22 2024

Forecast is based on ignition time of 1000 PDT on May 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Dry weather and a slight cooling trend continues
through the forecast period. Few to scattered low level clouds
may develop in the vicinity of the burn site overnight Wednesday
into Thursday but widespread low level clouds will stay confined
to the coast. Fair daytime humidity retention Wednesday and decent
overnight humidity recoveries overnight into Thursday as onshore
flow develops Wednesday. Slightly dryer conditions return
Thursday with poor to fair daytime humidity retention. Winds
gradually transition from southwest to westerly and, at times,
slightly northwesterly by Wednesday night. Probabilistic guidance
suggests maximum gusts up to 20 mph with a low probability (10 to
20%) of gusts exceeding 20 mph.


.REST OF TODAY...

Sky/weather.........Sunny.
Max temperature.....75-79.
Min humidity........41-45 percent.
Wind (20 ft)........Southwest winds 5 to 9 mph. Gusts up to 20 mph
                    in the afternoon.
CWR.................0 percent.
LAL.................1.
Mixing height.......2500 ft AGL.
Transport winds.....West around 8 mph.
Marine layer........None.

.TONIGHT...

Sky/weather.........Clear.
Min temperature.....47-51.
Max humidity........68-72 percent.
Wind (20 ft)........Southwest winds 5 to 9 mph. Gusts up to 20 mph
                    in the evening.
CWR.................0 percent.
LAL.................1.
Mixing height.......300 ft AGL.
Transport winds.....West around 9 mph.
Marine layer........None.

.THURSDAY...

Sky/weather.........Sunny.
Max temperature.....73-77.
Min humidity........31-35 percent.
Wind (20 ft)........West winds 5 to 8 mph. Gusts up to 20  mph
                    in the afternoon.
CWR.................0 percent.
LAL.................1.
Mixing height.......3200 ft AGL.
Transport winds.....Northwest around 9 mph.
Marine layer........None.

$$
Forecaster...R_KENNEDY
Requested by...Aaron Brunton
Type of request...PRESCRIBED
.TAG 2414701.1/MTR
.DELDT 05/22/24
.FormatterVersion 2.0.0
.EMAIL abrun@cccfpd.org