256
FNUS76 KMTR 211921
FWSMTR
SPOT FORECAST FOR SITE 300 RX BURN 5/22/26...ALAMEDA COUNTY FIRE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1221 PM PDT THU MAY 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON MAY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SEASONALLY WARM TEMPERATURES AND CRITICALLY LOW
DAYTIME HUMIDITIES WILL CONTINUE INTO FRIDAY, HOWEVER WON'T BE AS
DRY AS PREVIOUS DAYS. WINDS STAY OUT OF THE WEST WITH GUSTS TO
AROUND 30 MPH IN THE AFTERNOON/EVENING. POOR TO FAIR OVERNIGHT
HUMIDITY RECOVERIES ARE EXPECTED FRIDAY NIGHT. DAYTIME AND
OVERNIGHT HUMIDITIES ARE EXPECTED TO GRADUALLY IMPROVE THIS
WEEKEND.
FRIDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....83-87.
MIN HUMIDITY........16-20 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 16 MPH. GUSTS UP TO 30 MPH IN
THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIXING HEIGHT.......GENERALLY LESS THAN 400 FT IN THE MORNING,
INCREASING TO 4400 FT AGL BY THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 8 MPH.
MARINE LAYER........NONE.
FRIDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....57-61.
MAX HUMIDITY........40-45 PERCENT.
WIND (20 FT)........WEST WINDS 14 TO 20 MPH WITH GUSTS TO AROUND 30
MPH BECOMING SOUTHWEST 5 TO 8 MPH OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 11 MPH.
MARINE LAYER........NONE.
FORECASTER...R_GASS
REQUESTED BY...BRIAN DIREGOLO
TYPE OF REQUEST...PRESCRIBED
.TAG 2614001.0/MTR
.DELDT 05/21/26
.FORMATTERVERSION 2.0.0
.EMAIL BRIAN.DIREGOLO@ALAMEDACOUNTYFIRE.GOV
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