633
FNUS76 KSTO 212109 AAA
FWSSTO
SPOT FORECAST FOR SOUTH RIM PILE BURN...UPDATED
NATIONAL WEATHER SERVICE SACRAMENTO CA
209 PM PDT TUE APR 21 2026
FORECAST IS BASED ON IGNITION TIME OF 1200 PDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WEDNESDAY WILL SEE OUR TRANSITION INTO DRIER WEATHER WITH
SCATTERED SHOWERS IN THE EARLY MORNING HOURS, THEN TAPERING OFF
THROUGHOUT THE LATE MORNING AND AFTERNOON HOURS. WEDNESDAY'S
CONVECTIVE ACTIVITY IS FORECASTED TO REMAIN FURTHER SOUTH OF THE
AREA BUT AN ISOLATED SHOWER IN THE VICINITY OF THE FIRE IS
POSSIBLE.
GENERAL BREEZY WEATHER EXPECTED WITH WINDS OUT OF SOUTH ON
WEDNESDAY, SHIFTING FROM SOUTHEAST TO SOUTHWEST AND GUSTS UP TO
15-20 MPH. DAYTIME HUMIDITY VALUES WILL TREND DRIER WITH VALUES
AROUND 40-50% ON WEDNESDAY AND 30-40% ON THURSDAY. FORECAST SHOW
AN ADDITIONAL 0.05-0.10" OF RAIN FORECAST ON WEDNESDAY WITH A
20-30% OF AMOUNTS TOTALING OVER 0.10".
WEDNESDAY
SKY/WEATHER.........SUNNY. SLIGHT CHANCE OF RAIN LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........47-51 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS 5 TO 10 MPH.
RIDGETOP...........SOUTH 8 TO 12 MPH.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 12 MPH.
CWR.................5 PERCENT.
CHANCE OF THUNDER...8 PERCENT.
TIME (PDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC MCR MCR MCR PC MCR
CWR.............10 10 10 10 10 0
CHC OF THDR (%).10 10 0 0 0 0
TEMP............56 58 61 62 62 64
RH..............73 67 61 55 51 49
SL/VL WIND DIR..S S S S S S
SL/VL WIND SPD..8 7 7 6 6 5
SL/VL WIND GUST.13 12 12 10 10 8
RIDGE WIND DIR..SE SE S S SW SW
RIDGE WIND SPD..12 12 7 7 7 5
MIX HGT (KFT)...4.0 4.0 5.0 5.0 5.0 4.2
TRANSP WIND DIR.S S S S S S
TRANSP WIND SPD.12 12 7 7 7 5
WEDNESDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....44-48.
MAX HUMIDITY........75-79 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTH WINDS UP TO 5 MPH EARLY IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........SOUTH AROUND 5 MPH BECOMING LIGHT OVERNIGHT.
MIXING HEIGHT.......800 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH BECOMING LIGHT OVERNIGHT.
CWR.................1 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR MCR MCR MCR MCR MCR MCR 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............62 61 58 56 55 53 52 51 50 49 47 47
RH..............52 58 65 70 72 74 74 73 73 74 76 77
SL/VL WIND DIR..S S NE NE NE NE NE NE NE NE NE NE
SL/VL WIND SPD..5 5 2 2 2 2 2 2 2 2 2 2
SL/VL WIND GUST.8 8 5 5 5 3 3 3 3 3 3 5
RIDGE WIND DIR..S S E E E NE NE NE N N N N
RIDGE WIND SPD..5 5 5 5 5 6 6 6 6 6 6 5
MIX HGT (KFT)...4.2 4.2 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
TRANSP WIND DIR.S S E E E NE NE NE N N N N
TRANSP WIND SPD.5 5 5 5 5 6 6 6 6 6 6 5
THURSDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....70-74.
MIN HUMIDITY........34-38 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 8 MPH LATE IN
THE MORNING WITH GUSTS UP TO 10-15 MPH.
RIDGETOP...........NORTH 3 TO 8 MPH SHIFTING TO THE NORTHWEST 6 TO
10 MPH LATE IN THE AFTERNOON WITH GUSTS 15-20
MPH.
MIXING HEIGHT.......4200 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE NORTHWEST 6
TO 10 MPH LATE IN THE AFTERNOON.
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............47 48 50 54 58 62 65 68 70 71 72 72
RH..............77 76 74 70 65 59 54 49 45 40 37 36
SL/VL WIND DIR..NE NE N N N NW NW NW W W W W
SL/VL WIND SPD..2 2 2 2 2 7 7 7 8 8 8 6
SL/VL WIND GUST.5 5 5 5 5 13 13 13 14 14 14 9
RIDGE WIND DIR..N N N N N NW NW NW NW NW NW W
RIDGE WIND SPD..5 5 3 3 3 8 8 8 8 8 8 6
MIX HGT (KFT)...0.8 0.8 1.1 1.1 1.1 3.1 3.1 3.1 4.2 4.2 4.2 3.7
TRANSP WIND DIR.N N N N N NW NW NW NW NW NW W
TRANSP WIND SPD.5 5 3 3 3 8 8 8 8 8 8 6
FORECAST DAYS 3 THROUGH 5
FRIDAY
MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE MID 70S. LIGHT WINDS.
SATURDAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 60S.
SOUTHEAST WINDS AROUND 6 MPH.
SUNDAY
MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. LOWS IN THE LOWER 50S.
HIGHS IN THE MID 60S. SOUTHEAST WINDS AROUND 10 MPH.
FORECASTER...DA
REQUESTED BY...CHRIS MARKEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2611216.1/STO
.DELDT 04/21/26
.FORMATTERVERSION 2.0.0
.EMAIL LINDSEY.AMUNDSON@CHICO.CA.GOV
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