673
FNUS76 KSTO 130150
FWSSTO
SPOT FORECAST FOR BIG HILL...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
650 PM PDT TUE MAY 12 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON MAY 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MOSTLY CLEAR AND SUNNY SKIES TO CONTINUE AT THE BURN SITE THE NEXT
FEW DAYS. RIDGETOP WINDS FROM THE SOUTHWEST ON WEDNESDAY AROUND 12 TO
17 MPH, WITH DAYTIME HUMIDITY VALUES IN THE LOW TO MID 30S AS A WAVE
OF ENERGY MOVES THROUGH PORTIONS OF THE PACNW. PRECIPITATION CHANCES
HAVE TRENDED DOWN TO LITTLE TO NO CHANCES AS ENERGY HAS TRENDED FURTHER
NORTH AND OUT OF NORCAL. THURSDAY WILL SEE THE RETURN OF MOSTLY
DIURNAL/TERRAIN DRIVEN WINDS, WITH LOW DAYTIME HUMIDITY VALUES IN THE
LOW TO MID 20S. HIGH PRESSURE IS FORECAST TO BUILD OFFSHORE INCREASING
TEMPERATURES, LOWERING HUMIDITY VALUES, AND KEEPING TERRAIN DRIVEN
WINDS IN THE FORECAST.
WEDNESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........34-38 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 12 MPH DECREASING TO 5 TO
10 MPH IN THE AFTERNOON.
RIDGETOP...........SOUTHWEST 13 TO 18 MPH SHIFTING TO THE WEST 12
TO 17 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......4400 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 13 MPH SHIFTING TO THE WEST 12 TO
17 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.......CLR MCR CLR CLR CLR MCR MCR 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............49 51 52 51 54 57 61 62 63 63 64 63
RH..............48 47 44 43 45 40 36 36 36 35 34 36
SL/VL WIND DIR..S S SW SW SW SW SW SW SW W W W
SL/VL WIND SPD..6 6 7 12 12 12 10 9 8 8 7 6
SL/VL WIND GUST.13 13 14 18 20 20 18 18 17 17 16 15
RIDGE WIND DIR..S S SW SW SW SW SW SW W W W W
RIDGE WIND SPD..13 13 18 18 18 18 18 18 17 17 17 12
MIX HGT (KFT)...0.6 0.6 2.2 2.2 2.2 4.0 4.0 4.0 4.4 4.4 4.4 3.3
TRANSP WIND DIR.S S SW SW SW SW SW SW W W W W
TRANSP WIND SPD.13 13 18 18 18 18 18 18 17 17 17 12
WEDNESDAY NIGHT
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....41-45.
MAX HUMIDITY........53-57 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WEST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT.
RIDGETOP...........WEST 6 TO 12 MPH SHIFTING TO THE NORTH AROUND 6
MPH LATE IN THE EVENING, THEN SHIFTING TO THE
EAST 8 TO 9 MPH OVERNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....WEST AROUND 12 MPH DECREASING TO 6 TO 12 MPH IN
THE EVENING, THEN SHIFTING TO THE NORTH AROUND
6 MPH LATE IN THE EVENING SHIFTING TO THE EAST
8 TO 9 MPH OVERNIGHT.
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 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............63 61 58 55 53 51 50 49 47 45 45 44
RH..............35 37 42 45 47 49 50 51 52 53 54 55
SL/VL WIND DIR..W W W W W N N N E E E E
SL/VL WIND SPD..6 6 1 1 1 0 0 0 2 2 2 3
SL/VL WIND GUST.15 15 8 8 8 6 6 6 8 8 8 9
RIDGE WIND DIR..W W W W W N N N E E E E
RIDGE WIND SPD..12 12 6 6 6 6 6 6 8 8 8 9
MIX HGT (KFT)...3.3 3.3 0.6 0.6 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.5
TRANSP WIND DIR.W W W W W N N N E E E E
TRANSP WIND SPD.12 12 6 6 6 6 6 6 8 8 8 9
THURSDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....71-75.
MIN HUMIDITY........21-25 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST UP TO 8 MPH LATE IN
THE AFTERNOON.
RIDGETOP...........EAST 8 TO 10 MPH SHIFTING TO THE WEST 10 TO 14
MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......7600 FT AGL.
TRANSPORT WINDS.....EAST AROUND 9 MPH BECOMING 8 TO 10 MPH IN THE
MORNING AND EARLY AFTERNOON, THEN SHIFTING TO
THE WEST 10 TO 14 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.......CLR CLR 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............43 45 49 53 58 62 66 69 71 72 72 71
RH..............55 51 45 40 34 30 26 24 23 23 24 26
SL/VL WIND DIR..E E E E E E E E W W W W
SL/VL WIND SPD..3 3 3 3 3 3 3 3 5 5 5 8
SL/VL WIND GUST.9 9 10 10 10 9 9 9 12 12 12 17
RIDGE WIND DIR..E E E E E E E E W W W W
RIDGE WIND SPD..9 9 10 10 10 8 8 8 10 10 10 14
MIX HGT (KFT)...0.5 0.5 1.0 1.0 1.0 3.8 3.8 3.8 7.6 7.6 7.6 5.7
TRANSP WIND DIR.E E E E E E E E W W W W
TRANSP WIND SPD.9 9 10 10 10 8 8 8 10 10 10 14
FORECAST DAYS 3 THROUGH 7
FRIDAY
CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. LIGHT WINDS.
SATURDAY
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.
SOUTHWEST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S.
NORTHEAST WINDS AROUND 8 MPH.
MONDAY
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S.
TUESDAY
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S.
FORECASTER...JW
REQUESTED BY...CHRIS ENRIQUEZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2612855.7/STO
.DELDT 05/13/26
.FORMATTERVERSION 2.0.0
.EMAIL JOSEPH.MCGINN@USDA.GOV,CASEY.SIMONI@USDA.GOV,CHRISTIAN.ENRIQUEZ@USDA.GOV
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