516
FNUS76 KSTO 201957
FWSSTO
SPOT FORECAST FOR CHUTE INCIDENT...CAL FIRE NEU
NATIONAL WEATHER SERVICE SACRAMENTO CA
1257 PM PDT MON JUL 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 1300 PDT ON JULY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
NEAR NORMAL TO SLIGHTLY ABOVE NORMAL TEMPERATURES THE NEXT FEW DAYS NEAR THE
SITE OF THE FIRE, WITH MARGINALLY IMPROVED DAYTIME AND OVERNIGHT HUMIDITIES
DUE TO AN ONGOING SURGE OF MONSOONAL MOISTURE TO NORTHERN CALIFORNIA. DRIER
CONDITIONS AGAIN LATE WEEK AND INTO THE WEEKEND. WINDS WILL BE LARGELY TERRAIN
DRIVEN AND STRONGEST IN THE AFTERNOONS AND EVENINGS. STRONGEST WIND GUSTS ARE
EXPECTED WEDNESDAY WITH UP TO A 20% CHANCE OF 20 MPH GUSTS OR HIGHER IN THE
GENERAL AREA. MOST LIKELY WIND GUSTS NEAR THE FIRE WILL BE CLOSER TO 15 MPH,
HOWEVER, DOWN-CANYON WINDS MAY BE STRONGER. THERE IS A NON-ZERO CHANCE (LESS
THAN 5%) FOR THUNDERSTORMS IN THE AREA TUESDAY AFTERNOON, ALONG WITH CHANCES
FOR OUTLFOW WINDS TO REACH THE FIRE FROM NEARBY STORMS.
REST OF TODAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....89-93.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS UP TO 5 MPH WITH GUSTS UP TO 15 MPH.
RIDGETOP...........SOUTH 13 TO 18 MPH.
MIXING HEIGHT.......5100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 10 MPH.
CWR.................1 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR MCR MCR PC MCR
CWR.............0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0
TEMP............88 89 89 90 89
RH..............33 32 30 29 28
SL/VL WIND DIR..SW SW SW SW SW
SL/VL WIND SPD..5 5 5 5 3
SL/VL WIND GUST.12 12 12 12 10
RIDGE WIND DIR..S S S S S
RIDGE WIND SPD..17 16 16 15 14
MIX HGT (KFT)...4.2 5.1 5.1 5.1 4.4
TRANSP WIND DIR.SW SW SW SW SW
TRANSP WIND SPD.7 10 10 10 9
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....62-66.
MAX HUMIDITY........54-60 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT SOUTHWEST WINDS BECOMING NORTHEAST OVERNIGHT.
RIDGETOP...........SOUTHWEST 7 TO 12 MPH BECOMING NORTHEAST OVERNIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH SHIFTING TO THE EAST TO NORTHEAST
AROUND 6 MPH OVERNIGHT.
CWR.................1 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......PC MCR PC PC PC PC PC MCR MCR PC PC PC
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............89 87 82 78 75 74 72 71 70 69 68 68
RH..............28 29 33 38 42 46 51 54 56 57 58 59
SL/VL WIND DIR..SW SW SW S SE NE NE NE NE NE NE NE
SL/VL WIND SPD..3 2 2 1 1 1 1 1 1 1 1 1
SL/VL WIND GUST.9 7 6 5 3 3 3 3 3 3 3 3
RIDGE WIND DIR..SW SW S S S E E E NE NE NE NE
RIDGE WIND SPD..12 9 8 8 9 9 8 8 7 8 8 9
MIX HGT (KFT)...4.4 4.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SW SW S S S E E E NE NE NE NE
TRANSP WIND SPD.9 9 5 5 5 5 5 5 6 6 6 6
TUESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....91-96.
MIN HUMIDITY........28-33 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT NORTHEAST WINDS BECOMING SOUTHWEST UP TO
5 MPH EARLY IN THE AFTERNOON WITH GUSTS UP TO 15 MPH.
RIDGETOP...........NORTHEAST 5 TO 9 MPH BECOMING SOUTHWEST IN THE AFTERNOON.
MIXING HEIGHT.......5200 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 6 MPH SHIFTING TO THE WEST
EARLY IN THE MORNING.
CWR.................1 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC MCR MCR MCR MCR PC MCR MCR MCR MCR MCR PC
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 68 71 75 82 85 87 89 90 91 92 91
RH..............61 63 58 49 42 38 37 35 33 32 31 31
SL/VL WIND DIR..NE NE NE SW SW SW SW SW SW SW SW SW
SL/VL WIND SPD..1 1 1 1 1 2 3 5 5 5 3 2
SL/VL WIND GUST.3 3 3 3 5 7 9 10 12 14 10 9
RIDGE WIND DIR..NE NE W W W SW SW SW SW SW SW SW
RIDGE WIND SPD..9 8 7 6 6 5 5 5 5 5 5 5
MIX HGT (KFT)...0.5 0.5 1.4 1.4 1.4 3.7 3.7 3.7 5.2 5.2 5.2 4.4
TRANSP WIND DIR.NE NE W W W SW SW SW W W W W
TRANSP WIND SPD.6 6 1 1 1 6 6 6 7 7 7 6
FORECASTER...SP
REQUESTED BY...RODNEY HART
TYPE OF REQUEST...WILDFIRE
.TAG 2617818.0/STO
.DELDT 07/20/26
.FORMATTERVERSION 2.0.0
.EMAIL RODNEY.HART@FIRE.CA.GOV
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