500
FNUS76 KSTO 210402
FWSSTO
SPOT FORECAST FOR VULCAN...USDA-FS CA-ENF
NATIONAL WEATHER SERVICE SACRAMENTO CA
902 PM PDT MON APR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A WEATHER SYSTEM WILL BRING PERIODS OF MODERATE TO HEAVY RAIN AND
THUNDERSTORM CHANCES TUESDAY THROUGH WEDNESDAY. HEAVIEST RAINFALL
IS EXPECTED EARLY TUESDAY MORNING THROUGH THE AFTERNOON.
INTERMITTENT BREAKS IN THE RAIN ARE POSSIBLE THROUGH THE EARLY
AFTERNOON, BEFORE A SECOND ROUND OF MODERATE TO HEAVY
PRECIPITATION ARRIVES LATE AFTERNOON/EARLY EVENING WITH A 25-30%
CHANCE OF ISOLATED THUNDERSTORMS. WINDS WILL BE PRIMARILY OUT OF
THE SOUTH WITH GUSTS UP TO 15 MPH AS THE SYSTEM PUSHES THROUGH THE
AREA. FORECAST PRECIPITATION AMOUNTS ARE BETWEEN 2.75 AND 3.00
INCHES. LINGERING CHANCES FOR LIGHT PRECIPITATION ON WEDNESDAY,
ALONG WITH AN ADDITIONAL 10-15% CHANCE FOR THUNDERSTORMS. DRY
WEATHER RETURNS THURSDAY THROUGH FRIDAY, ACCOMPANIED BY
LIGHT, TERRAIN-DRIVEN WINDS.
TUESDAY
SKY/WEATHER.........CLOUDY. RAIN EARLY IN THE MORNING, THEN RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
MAX TEMPERATURE.....46-50.
MIN HUMIDITY........84-88 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS UP TO 5 MPH SHIFTING TO THE
SOUTH 5 TO 6 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
RIDGETOP...........SOUTH 9 TO 13 MPH.
MIXING HEIGHT.......1900 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 13 MPH.
CWR.................100 PERCENT.
CHANCE OF THUNDER...25 PERCENT.
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM
SKY COVER.......CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY
CWR.............100 100 100 100 100
CHC OF THDR (%).10 10 10 20 20
TEMP............45 44 44 44 45
RH..............88 92 97 95 94
SL/VL WIND......SE 5 S 5 SE 6 S 6 S 6
SL/VL WIND GUST.9 10 13 14 14
RIDGETOP WIND...S 13 S 13 SE 12 S 12 S 12
MIX HGT (FT)....1800 1800 1900 1900 1900
TRANSPORT WIND..S 13 S 13 SE 12 S 12 S 12
TUESDAY NIGHT
SKY/WEATHER.........CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE EVENING, THEN RAIN LATE IN
THE EVENING. CHANCE OF RAIN EARLY IN THE
MORNING.
MIN TEMPERATURE.....39-43.
MAX HUMIDITY........84-88 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS UP TO 6 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE
EVENING.
RIDGETOP...........SOUTH 9 TO 14 MPH.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 14 MPH.
CWR.................97 PERCENT DECREASING TO 40 PERCENT.
CHANCE OF THUNDER...22 PERCENT.
TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY COVER.......CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY CLOUDY
CWR.............100 100 100 70 70 70
CHC OF THDR (%).20 20 20 10 10 10
TEMP............44 44 44 44 45 44
RH..............88 85 85 86 86 83
SL/VL WIND......S 6 S 6 S 6 S 5 S 5 S 5
SL/VL WIND GUST.13 13 13 10 10 10
RIDGETOP WIND...S 9 S 10 S 10 S 14 S 13 S 13
MIX HGT (FT)....1900 1000 1000 1200 1100 1100
TRANSPORT WIND..S 9 S 10 S 10 S 14 S 13 S 13
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
CHANCE OF RAIN.
MAX TEMPERATURE.....48-52.
MIN HUMIDITY........67-71 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS UP TO 5 MPH SHIFTING TO THE
SOUTHWEST LATE IN THE AFTERNOON, THEN BECOMING
LIGHT LATE IN THE AFTERNOON.
RIDGETOP...........SOUTH 7 TO 12 MPH.
MIXING HEIGHT.......3900 FT AGL.
TRANSPORT WINDS.....SOUTH 7 TO 12 MPH.
CWR.................40 PERCENT DECREASING TO 12 PERCENT LATE IN THE
MORNING.
CHANCE OF THUNDER...12 PERCENT.
TIME (PDT) 6 AM 9 AM NOON 3 PM
SKY COVER.......MCLDY MCLDY MCLDY MCLDY
CWR.............40 40 10 10
CHC OF THDR (%).10 10 10 10
TEMP............44 43 45 49
RH..............82 82 80 72
SL/VL WIND......S 5G9 S 5G9 S 5G12 SW 5G12
RIDGETOP WIND...S 10 S 12 S 8 SW 7
MIX HGT (FT)....1200 1400 3100 3700
TRANSPORT WIND..S 10 S 12 S 8 SW 7
FORECAST DAYS 3 THROUGH 7
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS AROUND 60. LIGHT
WINDS.
FRIDAY
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER 60S. LIGHT
WINDS.
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS
IN THE UPPER 40S. HIGHS AROUND 60. LIGHT WINDS.
SUNDAY
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS IN THE UPPER 40S.
HIGHS IN THE MID 50S.
MONDAY
PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS IN THE MID 40S. HIGHS
AROUND 60.
FORECASTER...KF
REQUESTED BY...ANTHONY SIGONA
TYPE OF REQUEST...PRESCRIBED
.TAG 2610973.0/STO
.DELDT 04/21/26
.FORMATTERVERSION 2.0.0
.EMAIL ANTHONY.SIGONA@USDA.GOV,MARK.A.JOHNSON@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page