784
FNUS76 KSTO 161645
FWSSTO
SPOT FORECAST FOR BIG HILL 69...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
945 AM PDT TUE SEP 16 2025
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
..CHANCE OF THUNDERSTORMS THURSDAY THROUGH SATURDAY
DISCUSSION
A SURGE OF MOISTURE WILL BRING CHANCES FOR SHOWERS AND A 15 TO
25% CHANCE OF THUNDERSTORM TO THE PRESCRIBED BURN AREA BEGINNING
THURSDAY AFTERNOON THROUGH SATURDAY. HIGHEST THUNDERSTORM CHANCES
ARE ON FRIDAY (20-25%), WITH A 20-40% CHANCE OF 0.25 INCHES OR
MORE OF PRECIPITATION OVER THE THREE DAY PERIOD. WINDS WILL BE
TERRAIN DRIVEN ON THURSDAY, WITH EAST WINDS OVERNIGHT
TRANSITIONING TO SOUTH BY THE AFTERNOON. SOUTH TO SOUTHEAST WINDS
INCREASE ON FRIDAY WITH A 20-30% CHANCE OF GUSTS 20 MPH OR
GREATER.
TEMPERATURES ARE EXPECTED TO TREND COOLER WITH INCREASING
HUMIDITY AS THE SYSTEM PUSHES THROUGH. A BRIEF WARM UP BEGINS
EARLY NEXT WEEK, BEFORE COOLER WEATHER ARRIVES MID TO LATE NEXT
WEEK. BEYOND THE 7-DAY PERIOD, MODEL GUIDANCE HINTS AT ANOTHER
WEATHER SYSTEM MID NEXT WEEK WHICH COULD BRING SHOWER AND
THUNDERSTORM CHANCES BUT FORECAST CONFIDENCE IS LOW AT THIS TIME.
THURSDAY
SKY/WEATHER.........PARTLY SUNNY.
MAX TEMPERATURE.....72-76.
MIN HUMIDITY........20-24 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS 5 TO 9 MPH SHIFTING TO THE SOUTH 5
TO 6 MPH IN THE AFTERNOON WITH GUSTS 15-20 MPH.
RIDGETOP...........SOUTHEAST AROUND 9 MPH.
MIXING HEIGHT.......8900 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH.
CWR.................1 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY.
MIN TEMPERATURE.....53-57.
MAX HUMIDITY........56-60 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 6 MPH SHIFTING TO THE
SOUTH 5 TO 7 MPH OVERNIGHT WITH GUSTS 15-20 MPH.
RIDGETOP...........WEST AROUND 9 MPH.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST AROUND 9 MPH.
CWR.................7 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
FRIDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF RAIN SHOWERS IN
THE MORNING, THEN CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........53-57 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 8 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON WITH GUSTS 15-20 MPH.
GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE
AFTERNOON.
RIDGETOP...........SOUTH AROUND 7 MPH.
MIXING HEIGHT.......3300 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 7 MPH.
CWR.................24 PERCENT.
CHANCE OF THUNDER...15 PERCENT.
FORECAST DAYS 6 THROUGH 7
TUESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN
THE UPPER 60S.
WEDNESDAY
HIGHS IN THE MID 60S. LOWS IN THE LOWER 50S.
OUTLOOK FOR THURSDAY SEPTEMBER 25 THROUGH WEDNESDAY OCTOBER 01
BEYOND THE 7-DAY PERIOD, NEAR NORMAL TEMPERATURES AND SLIGHTLY
ABOVE NORMAL PRECIPITATION ARE ADVERTISED BY THE CLIMATE
PREDICTION CENTER, HOWEVER UNCERTAINTY PERSISTS REGARDING ANY
APPRECIABLE IMPACTS AT THIS TIME AS A RESULT OF THIS OUTLOOK.
FORECASTER...KF
REQUESTED BY...CHRIS ENRIQUEZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2522031.0/STO
.DELDT 09/16/25
.FORMATTERVERSION 2.0.0
.EMAIL CHRISTIAN.ENRIQUEZ@USDA.GOV
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