523
FNUS76 KSTO 180230
FWSSTO
SPOT FORECAST FOR GURNSEY CAMPGROUND...USFS
NATIONAL WEATHER SERVICE SACRAMENTO CA
730 PM PDT SUN MAY 17 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON MAY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
LOW DAYTIME HUMIDITIES AND GUSTY NORTH TO NORTHEAST WINDS REMAIN
ON TRACK FOR MONDAY COUPLED WITH WARMING TEMPERATURES. THE
STRONGEST WINDS OF THE PERIOD WILL BE MONDAY MORNING WITH PEAK
RIDGE GUSTS 30 TO 36 MPH AND SLOPE/VALLEY GUSTS 20 TO 25 MPH,
BEFORE STEADILY WEAKENING BUT REMAINING BREEZY THROUGH THE
AFTERNOON HOURS. WINDS TREND LIGHTER ON TUESDAY, REMAINING OUT OF
THE NORTHEAST FOR MOST OF THE DAY, WITH AFTERNOON SLOPE/VALLEY
GUSTS TO 10 MPH. DAYTIME MINIMUM RELATIVE HUMIDITIES WILL BE IN
THE LOW TEENS THROUGH WEDNESDAY, WITH WELL ABOVE NORMAL HIGH
TEMPERATURES. NO PRECIPITATION IS EXPECTED OVER THE NEXT 7 DAYS.
MONDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....63-67.
MIN HUMIDITY........12-16 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 10 MPH. GUSTS UP TO 25 MPH
EARLY IN THE MORNING.
RIDGETOP...........NORTHEAST 29 TO 36 MPH DECREASING TO 10 TO 14
MPH.
MIXING HEIGHT.......9200 FT AGL.
TRANSPORT WINDS.....EAST 20 TO 24 MPH DECREASING TO 12 TO 14 MPH
LATE IN THE AFTERNOON.
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 MCR
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............37 45 52 56 59 61 63 64 65 65
RH..............52 38 27 21 18 16 15 14 14 14
SL/VL WIND DIR..E E E E E E E E E E
SL/VL WIND SPD..9 10 10 9 8 7 6 6 5 5
SL/VL WIND GUST.24 25 23 20 17 15 14 13 12 12
RIDGE WIND DIR..NE NE NE NE NE NE NE NE NE NE
RIDGE WIND SPD..36 32 29 24 21 16 14 12 10 10
MIX HGT (KFT)...2.9 2.9 2.9 5.9 5.9 5.9 9.2 9.2 9.2 8.2
TRANSP WIND DIR.E E E E E E E E E NE
TRANSP WIND SPD.24 24 24 20 20 20 14 14 14 12
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....33-37.
MAX HUMIDITY........45-49 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......EAST WINDS UP TO 5 MPH SHIFTING TO THE
NORTHEAST LATE IN THE EVENING, THEN BECOMING
LIGHT OVERNIGHT.
RIDGETOP...........NORTHEAST 7 TO 16 MPH DECREASING TO AROUND 6
MPH EARLY IN THE MORNING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 9 TO 12 MPH.
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR MCR MCR MCR MCR 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............64 63 59 52 48 45 43 41 40 38 37 38
RH..............14 15 24 30 35 38 42 44 45 47 47 47
SL/VL WIND DIR..E E NE NE NE NE NE NE NE NE NE NE
SL/VL WIND SPD..5 5 5 5 5 5 5 5 3 3 3 3
SL/VL WIND GUST.12 12 12 12 12 10 10 10 9 9 9 8
RIDGE WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE
RIDGE WIND SPD..12 13 14 15 16 16 15 14 12 9 7 6
MIX HGT (KFT)...8.2 8.2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.12 12 9 9 9 10 10 10 10 10 10 9
TUESDAY
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....70-74.
MIN HUMIDITY........13-17 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING EAST UP TO 5 MPH LATE IN
THE MORNING, THEN SHIFTING TO THE SOUTHWEST
LATE IN THE AFTERNOON SHIFTING TO THE WEST LATE
IN THE AFTERNOON.
RIDGETOP...........NORTH 2 TO 5 MPH SHIFTING TO THE NORTHWEST 7 TO
9 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......9200 FT AGL.
TRANSPORT WINDS.....NORTHEAST 9 TO 10 MPH SHIFTING TO THE NORTHWEST
AROUND 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.......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............35 37 42 49 56 63 67 69 70 72 72 72
RH..............47 44 38 31 24 18 15 15 15 14 14 15
SL/VL WIND DIR..NE NE E E E E E E SW SW SW W
SL/VL WIND SPD..3 3 3 3 3 5 5 5 5 5 5 5
SL/VL WIND GUST.8 8 9 9 9 10 10 10 9 9 9 10
RIDGE WIND DIR..NE N N N NE NE NE N N N NW NW
RIDGE WIND SPD..5 5 5 5 3 3 2 2 2 5 7 9
MIX HGT (KFT)...0.5 0.5 1.8 1.8 1.8 6.7 6.7 6.7 9.2 9.2 9.2 8.7
TRANSP WIND DIR.NE NE E E E NE NE NE N N N NW
TRANSP WIND SPD.9 9 10 10 10 10 10 10 9 9 9 10
FORECAST DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 70S.
LIGHT WINDS.
THURSDAY
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 70S. LIGHT
WINDS.
FRIDAY
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 70S. LIGHT
WINDS.
SATURDAY
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 70S.
SUNDAY
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S.
FORECASTER...KF
REQUESTED BY...JOHN OUTLAND
TYPE OF REQUEST...PRESCRIBED
.TAG 2613453.0/STO
.DELDT 05/18/26
.FORMATTERVERSION 2.0.0
.EMAIL JOHN.OUTLAND@USDA.GOV
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