180
FNUS76 KSTO 211842
FWSSTO
SPOT FORECAST FOR CHUTE INCIDENT...CAL FIRE NEU
NATIONAL WEATHER SERVICE SACRAMENTO CA
1142 AM PDT TUE JUL 21 2026
FORECAST IS BASED ON FORECAST START TIME OF 1200 PDT ON JULY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HIGHER THAN NORMAL TEMPERATURES TODAY WITH NEAR NORMAL CONDITIONS THE
REMAINDER OF THE WEEK. DAYTIME HUMIDITY WILL BE IN THE 30S TODAY,
INCREASING WEDNESDAY UP TO THE MID 40S, WITH GOOD OVERNIGHT RECOVERIES
TONIGHT AND EXCELLENT RECOVERIES OVERNIGHT ON WEDNESDAY NIGHT. WINDS
REMAIN PRIMARILY TERRAIN DRIVEN, WITH STRONGEST GUSTS EXPECTED IN THE
AFTERNOONS AND EVENINGS. STRONGEST WINDS THIS WEEK WILL OCCUR ON
WEDNESDAY AFTERNOON AND EVENING AS ONSHORE FLOW INCREASES. SOUTHELRY
GUSTS MAY GET UP TO AROUND 20 TO 25 MPH (10-15% CHANCE) AT PEAK SPEEDS
IN THE AFTERNOON (POTENTIALLY STRONGER IN DOWN-CANYON AREAS) . WHILE
THUNDERSTORM CHANCES NEAR THE FIRE REMAIN BELOW 5% TODAY AND WEDNESDAY,
NEARBY STORMS AT HIGHER ELEVATIONS MAY BRING ABOUT GUSTY OUTFLOW WINDS.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....92-96.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST UP TO 5 MPH WITH GUSTS UP TO 13 MPH.
RIDGETOP...........SOUTHWEST AROUND 6 MPH.
MIXING HEIGHT.......4700 FT AGL.
TRANSPORT WINDS.....WEST-SOUTHWEST AROUND 8 MPH.
CWR.................1 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TIME (PDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC MCR MCR MCR MCR PC
CWR.............0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............87 88 90 92 92 93
RH..............39 37 35 33 33 33
SL/VL WIND DIR..SW SW SW SW SW SW
SL/VL WIND SPD..3 5 5 5 3 3
SL/VL WIND GUST.9 10 12 13 10 9
RIDGE WIND DIR..SW SW SW S S SW
RIDGE WIND SPD..6 6 7 7 6 6
MIX HGT (KFT)...3.4 3.4 4.7 4.7 4.7 4.3
TRANSP WIND DIR.W W W W W SW
TRANSP WIND SPD.8 8 8 8 8 8
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....63-68.
MAX HUMIDITY........67-73 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST TO SOUTHEAST WINDS LESS THAN 5 MPH.
RIDGETOP...........SOUTH TO SOUTH-SOUTHEAST AROUND 6 TO 13 MPH.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH SHIFTING TO THE SOUTHEAST
LATE IN THE EVENING.
CWR.................1 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......PC MCR MCR PC MCR MCR CLR MCR MCR MCR MCR MCR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............92 90 88 82 78 76 74 73 72 70 69 69
RH..............34 37 42 47 53 57 62 65 67 69 70 71
SL/VL WIND DIR..SW SW SW S SE E E NE NE NE NE E
SL/VL WIND SPD..2 2 2 1 1 1 1 1 1 1 1 2
SL/VL WIND GUST.8 7 6 3 3 5 3 3 3 3 3 5
RIDGE WIND DIR..S S S S S S S S S S S S
RIDGE WIND SPD..5 6 6 6 6 6 7 8 9 10 12 13
MIX HGT (KFT)...4.3 4.3 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SW SW S S S SE SE SE SE SE SE SE
TRANSP WIND SPD.6 6 5 5 5 6 6 6 5 5 5 6
WEDNESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....89-93.
MIN HUMIDITY........39-43 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH TO SOUTHWEST UP TO 6 MPH WITH GUSTS UP TO
15 MPH IN THE AFTERNOON.
RIDGETOP...........SOUTH 14 TO 25 MPH INCREASING UP TO 28 MPH LATE
IN THE AFTERNOON.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST 6 TO 12 MPH.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR MCR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............66 69 71 75 81 83 85 88 89 89 91 89
RH..............71 71 68 62 56 52 49 47 45 42 41 41
SL/VL WIND DIR..S S S S S SW SW SW SW SW SW SW
SL/VL WIND SPD..2 2 2 2 2 5 5 5 6 6 6 5
SL/VL WIND GUST.5 5 8 8 8 13 13 13 14 14 14 13
RIDGE WIND DIR..S S S S S S S S S S S S
RIDGE WIND SPD..14 14 15 16 18 20 22 23 24 24 26 27
MIX HGT (KFT)...0.5 0.5 2.3 2.3 2.3 4.3 4.3 4.3 5.7 5.7 5.7 5.6
TRANSP WIND DIR.S S S S S S S S SW SW SW SW
TRANSP WIND SPD.6 6 6 6 6 8 8 8 10 12 11 9
FORECASTER...SP
REQUESTED BY...RODNEY HART
TYPE OF REQUEST...WILDFIRE
.TAG 2617882.0/STO
.DELDT 07/21/26
.FORMATTERVERSION 2.0.0
.EMAIL RODNEY.HART@FIRE.CA.GOV
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