339
FNUS76 KSTO 220150
FWSSTO
SPOT FORECAST FOR CHUTE INCIDENT...CAL FIRE NEU
NATIONAL WEATHER SERVICE SACRAMENTO CA
650 PM PDT TUE JUL 21 2026
FORECAST IS BASED ON FORECAST START TIME OF 0000 PDT ON JULY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DAYTIME HUMIDITY ON WEDNESDAY UP TO THE MID 40S EXPECTED, WITH
GOOD OVERNIGHT RECOVERIES TONIGHT AND WEDNESDAY NIGHT. DRYING
TREND RETURNS THURSDAY INTO THE WEEKEND WITH DAYTIME HUMIDITY TO
AROUND 30, IN THE 20S FRIDAY INTO THE WEEKEND. HIGHS IN THE UPPER
80S TO LOW 90S OVER THE NEXT SEVERAL DAYS.
WINDS REMAIN TERRAIN DRIVEN, WITH STRONGEST GUSTS EXPECTED IN THE
AFTERNOONS AND EVENINGS. STRONGEST WINDS THIS WEEK WILL OCCUR
WEDNESDAY AFTERNOON AND EVENING WITH SOUTH GUSTS UP TO 20-25 MPH
(10-15% & POTENTIALLY STRONGER IN DOWN-CANYON AREAS). THURSDAY
WILL SEE CONDITIONS LOWER TO TYPICAL, DAILY BREEZY AFTERNOON
WINDS. WHILE THUNDERSTORM CHANCES NEAR THE FIRE REMAIN BELOW 5%
WEDNESDAY, NEARBY STORMS AT HIGHER ELEVATIONS MAY BRING ABOUT
GUSTY OUTFLOW WINDS. THURSDAY WILL SEE CHANCES PULL FURTHER EAST,
REDUCING THE GUSTY OUTFLOW THREAT.
REST OF TONIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....65-69.
MAX HUMIDITY........65-69 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
RIDGETOP...........SOUTH 6 TO 10 MPH.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 5 TO 7 MPH.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......CLR CLR MCR CLR MCR CLR
TEMP............76 75 74 73 71 70
RH..............55 57 58 60 61 63
SL/VL WIND DIR..SE SE SE SE SE SE
SL/VL WIND SPD..1 0 0 0 1 2
SL/VL WIND GUST.3 2 2 2 3 5
RIDGE WIND DIR..SE SE SE SE SE SE
RIDGE WIND SPD..7 7 5 5 5 6
MIX HGT (KFT)...0.4 0.4 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SE SE SE SE SE SE
TRANSP WIND SPD.7 7 5 5 5 6
WEDNESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....87-91.
MIN HUMIDITY........39-43 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST 5 TO 8 MPH
IN THE AFTERNOON WITH GUSTS UP TO 15-20 MPH.
RIDGETOP...........SOUTH 6 TO 10 MPH INCREASING TO 10 TO 15 MPH
LATE IN THE AFTERNOON WITH WINDS UP TO 15-25
MPH AT TIMES.
MIXING HEIGHT.......4600 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 6 MPH SHIFTING TO THE SOUTHWEST 7
TO 12 MPH LATE IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
TEMP............69 68 71 73 79 81 83 85 87 87 88 87
RH..............66 67 67 64 59 55 53 50 47 44 42 41
SL/VL WIND DIR..SE SE S S S SW SW SW S S S SW
SL/VL WIND SPD..2 2 3 3 3 5 6 6 6 6 6 6
SL/VL WIND GUST.5 6 7 8 9 10 12 13 14 14 15 15
RIDGE WIND DIR..SE SE S S S SW SW SW S S S SW
RIDGE WIND SPD..6 6 6 6 6 7 7 7 9 9 9 9
MIX HGT (KFT)...0.5 0.5 2.0 2.0 2.0 3.4 3.4 3.4 4.6 4.6 4.6 4.5
TRANSP WIND DIR.SE SE S S S SW SW SW S S S SW
TRANSP WIND SPD.6 6 6 6 6 7 7 7 9 9 9 9
WEDNESDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....59-63.
MAX HUMIDITY........82-86 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 4 TO 8 MPH EARLY IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........SOUTHWEST 8 TO 12 BECOMING LIGHT NORTHEAST
WINDS OVERNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 9 MPH SHIFTING TO THE NORTHEAST
4 TO 6 MPH OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......CLR CLR CLR CLR CLR MCR MCR MCR CLR CLR CLR CLR
TEMP............87 86 81 76 73 71 70 68 67 65 64 64
RH..............42 44 47 57 64 69 75 79 82 84 84 83
SL/VL WIND DIR..SW SW S S S SE SE SE E E E NE
SL/VL WIND SPD..6 6 3 3 3 0 0 0 0 0 0 1
SL/VL WIND GUST.14 14 12 12 12 2 2 2 3 3 3 3
RIDGE WIND DIR..SW SW S S S SE SE SE E E E NE
RIDGE WIND SPD..9 9 6 6 6 5 5 5 3 3 3 5
MIX HGT (KFT)...4.5 4.5 0.6 0.6 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.SW SW S S S SE SE SE E E E NE
TRANSP WIND SPD.9 9 6 6 6 5 5 5 3 3 3 5
THURSDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....89-93.
MIN HUMIDITY........27-31 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST 4 TO 7 MPH LATE
IN THE AFTERNOON.
RIDGETOP...........LIGHT WINDS BECOMING SOUTHWEST 5 TO 10 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......4100 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST LATE IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
TEMP............62 63 67 71 76 80 83 85 87 89 90 90
RH..............84 81 75 69 62 55 49 43 38 33 30 29
SL/VL WIND DIR..NE NE SW SW SW SW SW SW SW SW SW SW
SL/VL WIND SPD..1 1 1 1 1 3 3 3 5 5 5 3
SL/VL WIND GUST.3 3 3 3 3 9 9 9 12 12 12 10
RIDGE WIND DIR..NE NE NW NW NW SW SW SW SW SW SW SW
RIDGE WIND SPD..5 5 3 3 3 6 6 6 8 8 8 7
MIX HGT (KFT)...0.4 0.4 0.5 0.5 0.5 2.4 2.4 2.4 4.1 4.1 4.1 4.1
TRANSP WIND DIR.NE NE NW NW NW SW SW SW SW SW SW SW
TRANSP WIND SPD.5 5 3 3 3 6 6 6 8 8 8 7
FORECAST DAYS 3 THROUGH 5
FRIDAY
CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE LOWER 90S. LIGHT
WINDS.
SATURDAY
CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE LOWER 90S. LIGHT
WINDS.
SUNDAY
CLEAR. LOWS IN THE LOWER 60S. HIGHS IN THE LOWER 90S. LIGHT
WINDS.
FORECASTER...DA
REQUESTED BY...RODNEY HART
TYPE OF REQUEST...WILDFIRE
.TAG 2617921.0/STO
.DELDT 07/21/26
.FORMATTERVERSION 2.0.0
.EMAIL RODNEY.HART@FIRE.CA.GOV
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