216
FNUS76 KSTO 221652
FWSSTO
SPOT FORECAST FOR ROSS RANCH RX...CAL FIRE
NATIONAL WEATHER SERVICE SACRAMENTO CA
952 AM PDT TUE SEP 22 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON SEPTEMBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARM AND DRY WEATHER EXPECTED WEDNESDAY AND THURSDAY WITH WINDS ON
WEDNESDAY SHIFTING FROM NORTH WINDS AROUND NOON, WEAKENING AND
TURNING TO THE SOUTH BY 3 PM. WINDS WILL BE FAIRLY LIGHT ON
WEDNESDAY WITH BREEZIER WINDS THURSDAY WITH GUSTS UP TO 15-20
MPH. DAYTIME HUMIDITY WILL BE IN UPPER TEEN TO LOW 20S WITH
SIMILAR VALUES FOR THURSDAY AFTERNOON AND HIGHS NEAR THE LOW 90S.
WEDNESDAY
SKY/WEATHER.........SUNNY BECOMING MOSTLY CLOUDY IN THE AFTERNOON.
MAX TEMPERATURE.....91-95.
MIN HUMIDITY........18-22 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTH WINDS UP TO 5 MPH IN THE MORNING
THEN BECOMING SOUTH 4 TO 8 MPH IN THE AFTERNOON.
MIXING HEIGHT.......INCREASING TO 5900 FT AGL.
TRANSPORT WINDS.....NORTH 4 TO 9 MPH SHIFTING TO THE SOUTH 5 TO 9
MPH IN THE AFTERNOON.
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM
SKY COVER.......MCLEAR MCLEAR PCLDY MCLEAR PCLDY
TEMP............62 77 85 91 91
RH..............61 37 27 22 20
SL/VL WIND......N 5 N 2 NE 2 S 3 S 5
SL/VL WIND GUST.10 8 6 7 10
MIX HGT (FT)....1100 1100 4100 5900 5900
TRANSPORT WIND..N 9 N 8 N 2 S 6 S 6
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY CLEAR.
MIN TEMPERATURE.....57-61.
MAX HUMIDITY........54-58 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS.
MIXING HEIGHT.......DECREASING TO 400 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 7 MPH SHIFTING TO NORTH LATE
IN THE EVENING.
TIME (PDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY COVER.......MCLDY PCLDY PCLDY MCLEAR MCLEAR MCLEAR
TEMP............91 82 72 67 65 62
RH..............21 31 42 50 52 55
SL/VL WIND......S 3 NW 2 NW 2 N 3 N 2 N 2
SL/VL WIND GUST.9 7 7 8 7 7
MIX HGT (FT)....2800 400 400 400 400 400
TRANSPORT WIND..S 7 W 3 W 3 N 6 N 8 N 8
THURSDAY
SKY/WEATHER.........SUNNY THEN BECOMING PARTLY SUNNY.
MAX TEMPERATURE.....88-92.
MIN HUMIDITY........20-24 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT NORTH WINDS BECOMING SOUTH 5 TO 7 MPH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 8 MPH SHIFTING TO THE SOUTH 6 TO
14 MPH LATE IN THE MORNING.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC PC MCR MCR MCR MCR MCR MCR MCR MCR MCR MC
TEMP............60 60 62 68 75 81 84 87 88 89 90 89
RH..............57 57 54 47 37 29 26 24 24 22 22 22
SL/VL WIND DIR..N N N N N SE SE SE S S S S
SL/VL WIND SPD..2 2 3 3 3 2 2 2 6 6 6 7
SL/VL WIND GUST.7 7 8 8 8 6 6 6 13 13 13 15
MIX HGT (KFT)...0.4 0.4 0.2 0.2 0.2 3.2 3.2 3.2 5.4 5.4 5.4 5.7
TRANSP WIND DIR.N N N N N S S S S S S S
TRANSP WIND SPD.8 8 8 8 8 6 6 6 12 12 12 14
FORECAST DAYS 3 THROUGH 5
FRIDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE LOWER 80S.
LIGHT WINDS.
SATURDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S. NORTH
WINDS AROUND 7 MPH.
SUNDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE UPPER 70S. LIGHT
WINDS.
FORECASTER...DA
REQUESTED BY...JAN SMUTZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2622314.0/STO
.DELDT 09/22/26
.FORMATTERVERSION 2.0.0
.EMAIL JAN.SMUTZ@FIRE.CA.GOV
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