899
FNUS76 KSTO 171951
FWSSTO
SPOT FORECAST FOR SOUTH GROVE RX BURN...CALIFORNIA STATE PARKS
NATIONAL WEATHER SERVICE SACRAMENTO CA
1251 PM PDT SAT OCT 17 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON OCTOBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SUNNY, DRY AND WARM SUNDAY AT THE BURN SITE, WITH HIGHS AROUND 70.
HUMIDITY LEVELS WILL START AROUND 30 PERCENT AT THE PLANNED
IGNITION TIME, DROPPING INTO THE LOW 20S BY THE EARLY AFTERNOON.
LIGHT EASTERLY WINDS IN THE MORNING, SHIFTING TO SOUTHWEST 6 MPH
WITH GUSTS TO 14 MPH IN THE AFTERNOON. A PATTERN CHANGE ARRIVES LATER
SUNDAY NIGHT WITH ONSHORE FLOW, COOLER TEMPERATURES, AND INCREASING
HUMIDITY VALUES/RECOVERIES. STRONGER SOUTHWEST WIND GUSTS WILL
ARRIVE MONDAY AFTERNOON, WITH SUSTAINED 20 FOOT WINDS ON SLOPES
OUT OF THE SOUTH UP TO 9 MPH, WITH GUSTS UP TO 24 MPH POSSIBLE ON
SLOPES, THOUGH SHELTERING IN OPEN STANDS OF TIMBER IS CALCULATED
TO REDUCE THIS TO EYE-LEVEL WINDS AROUND 2 MPH WITH GUSTS TO 5
MPH. RIDGE WINDS UP TO 22 MPH ARE POSSIBLE MID-DAY MONDAY THROUGH
THE AFTERNOON, WITH EYE-LEVEL WINDS CALCULATED TO BE AROUND 5
MPH. PRECIPITATION CHANCES NOW LOOK TO HOLD OFF UNTIL TUESDAY
EVENING, WHERE LIGHT RAIN SHOWERS ARE POSSIBLE. THERE IS CURRENTLY
A FORECAST RAINFALL TOTAL OF 0.25". THERE IS A 5-10% CHANCE OF
THUNDER WEDNESDAY THROUGH THURSDAY.
SUNDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....68-72.
MIN HUMIDITY........20-24 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 7 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTHWEST UP TO 6
MPH WITH GUSTS TO 14 MPH IN THE AFTERNOON.
RIDGETOP...........WEST 6 TO 9 MPH SHIFTING TO THE SOUTHWEST 6 TO
7 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....EAST AROUND 7 MPH SHIFTING TO THE SOUTHWEST 7
TO 9 MPH LATE IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
CWR.............0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0
TEMP............54 59 66 68 69 70 69 68 67 63
RH..............31 29 25 25 24 24 24 26 29 32
SL/VL WIND DIR..E E S SW SW SW SW SW SW W
SL/VL WIND SPD..7 5 2 3 5 6 6 6 6 2
SL/VL WIND GUST.14 10 6 7 9 12 13 14 13 10
RIDGE WIND DIR..W W W W W SW SW SW SW S
RIDGE WIND SPD..9 8 8 7 6 6 6 6 6 7
MIX HGT (KFT)...1.5 1.5 1.5 5.4 5.4 5.4 5.5 5.5 5.5 2.1
TRANSP WIND DIR.E E E SW SW SW SW SW SW W
TRANSP WIND SPD.7 7 7 7 7 7 9 9 9 7
SUNDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....49-53.
MAX HUMIDITY........41-45 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING EAST UP TO 6 MPH EARLY IN
THE EVENING.
RIDGETOP...........WEST AROUND 7 MPH SHIFTING TO THE EAST 7 TO 9
MPH BY THE EVENING.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....WEST AROUND 7 MPH SHIFTING TO THE EAST 7 TO 9
MPH EARLY IN THE EVENING.
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 CLR CLR CLR CLR CLR CLR 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............60 56 54 54 53 53 53 52 52 53 53 52
RH..............39 43 46 45 44 43 41 39 37 36 36 37
SL/VL WIND DIR..W W E E E E E E E E E E
SL/VL WIND SPD..2 2 6 6 6 5 5 5 5 5 5 5
SL/VL WIND GUST.10 10 14 14 14 9 9 9 8 8 8 8
RIDGE WIND DIR..W W E E E E E E E E E E
RIDGE WIND SPD..7 7 7 7 7 8 8 8 9 9 9 9
MIX HGT (KFT)...2.1 2.1 0.3 0.3 0.3 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W E E E E E E E E E E
TRANSP WIND SPD.7 7 7 7 7 8 8 8 9 9 9 9
MONDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....61-65.
MIN HUMIDITY........33-37 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 6 MPH SHIFTING TO THE SOUTH UP
TO 9 MPH WITH GUSTS TO AROUND 24 MPH LATE IN
THE MORNING, SHIFTING TO THE SOUTHWEST UP TO
8 MPH GUSTING TO 22 MPH IN THE AFTERNOON.
RIDGETOP...........SOUTHEAST 8 TO 12 MPH IN THE EARLY MORNING,
INCREASING TO SOUTHWEST AROUND 22 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......5400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH SHIFTING TO THE SOUTH 15
TO 22 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.......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............52 51 51 54 58 61 62 63 62 61 60 58
RH..............38 38 38 37 36 35 34 34 36 40 45 50
SL/VL WIND DIR..E E E E E S S SW SW SW SW SW
SL/VL WIND SPD..5 5 6 6 6 8 9 9 8 8 8 5
SL/VL WIND GUST.8 8 12 12 12 24 24 24 22 22 22 14
RIDGE WIND DIR..E E SE SE SE S S SW SW SW SW SW
RIDGE WIND SPD..9 9 9 9 9 22 22 22 22 22 22 15
MIX HGT (KFT)...0.5 0.5 0.5 0.5 0.5 5.1 5.1 5.1 5.4 5.4 5.4 3.1
TRANSP WIND DIR.E E SE SE SE S S S S S S S
TRANSP WIND SPD.9 9 9 9 9 21 21 21 22 22 22 15
FORECASTER...EK
REQUESTED BY...RICHARD RAPPAPORT
TYPE OF REQUEST...PRESCRIBED
.TAG 2623904.1/STO
.DELDT 10/17/26
.FORMATTERVERSION 2.0.0
.EMAIL RICHARD.RAPPAPORT@PARKS.CA.GOV,BJACOBS111111@GMAIL.COM,BEN.JACOBS@PARKS.CA.GOV
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