046  
FNUS76 KSTO 170328  
FWSSTO  
 
SPOT FORECAST FOR GURNSEY CAMPGROUND...USFS  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
828 PM PDT SAT MAY 16 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 ARE  
EXPECTED ALONGSIDE WARMING TEMPERATURES ON MONDAY. THE STRONGEST  
WINDS OF THE PERIOD WILL BE MONDAY MORNING WITH PEAK  
RIDGE GUSTS 30 TO 36 MPH AND SLOPE/VALLEY GUSTS 20 TO 24 MPH,  
BEFORE STEADILY WEAKENING THROUGH THE AFTERNOON HOURS. WINDS TREND  
LIGHTER ON TUESDAY, REMAINING OUT OF THE NORTHEAST, WITH  
AFTERNOON SLOPE/VALLEY GUSTS TO 13 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.....64-68.  
MIN HUMIDITY........13-17 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHEAST WINDS UP TO 9 MPH. GUSTS UP TO 24 MPH  
EARLY IN THE MORNING.  
RIDGETOP...........NORTHEAST 30 TO 36 MPH DECREASING TO 6 TO 14  
MPH.  
MIXING HEIGHT.......10200 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 12 TO 20 MPH.  
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 43 50 56 60 62 64 65 66 66  
RH..............57 46 33 23 18 16 16 15 14 15  
SL/VL WIND DIR..NE NE NE NE NE NE NE NE NE N  
SL/VL WIND SPD..9 9 9 8 8 8 6 6 6 5  
SL/VL WIND GUST.24 24 24 18 18 18 13 13 13 12  
RIDGE WIND DIR..NE NE NE NE NE NE NE NE NE NE  
RIDGE WIND SPD..36 31 26 21 17 14 12 8 6 6  
MIX HGT (KFT)...2.0 2.0 2.0 4.6 4.6 4.6 9.1 9.1 9.1 10  
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE N  
TRANSP WIND SPD.20 20 20 17 17 17 15 15 15 12  
   
MONDAY NIGHT  
 
SKY/WEATHER.........CLEAR.  
MIN TEMPERATURE.....33-37.  
MAX HUMIDITY........49-53 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH WINDS UP TO 5 MPH EARLY IN THE EVENING  
BECOMING LIGHT, THEN BECOMING NORTHEAST UP TO 5  
MPH LATE IN THE EVENING BECOMING LIGHT.  
RIDGETOP...........NORTHEAST 7 TO 16 MPH SHIFTING TO THE NORTHWEST  
7 TO 8 MPH AFTER 3 AM.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 8 TO 13 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 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............64 61 58 54 50 46 43 41 40 38 37 36  
RH..............17 21 25 30 35 40 43 45 47 49 51 51  
SL/VL WIND DIR..N N NE NE NE NE NE NE NE NE NE NE  
SL/VL WIND SPD..5 5 3 3 3 5 5 5 3 3 3 3  
SL/VL WIND GUST.12 12 10 10 10 10 10 10 9 9 9 7  
RIDGE WIND DIR..NE NE NE NE NE NE NE NE N N NW NW  
RIDGE WIND SPD..8 12 15 16 15 14 12 9 7 7 7 8  
MIX HGT (KFT)...10 10 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.4  
TRANSP WIND DIR.N N NE NE NE NE NE NE NE NE NE E  
TRANSP WIND SPD.12 12 10 10 10 13 13 13 12 12 12 8  
   
TUESDAY  
 
SKY/WEATHER.........SUNNY.  
MAX TEMPERATURE.....70-74.  
MIN HUMIDITY........13-17 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST UP TO 6 MPH LATE IN  
THE AFTERNOON.  
RIDGETOP...........NORTHWEST 3 TO 8 MPH.  
MIXING HEIGHT.......9200 FT AGL.  
TRANSPORT WINDS.....NORTHEAST AROUND 8 MPH SHIFTING TO THE WEST 10  
TO 12 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 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............37 39 43 50 57 64 68 69 70 72 72 72  
RH..............49 45 40 32 24 18 16 15 16 15 16 16  
SL/VL WIND DIR..NE NE E E E SE SE SE W W W W  
SL/VL WIND SPD..3 3 2 2 2 3 3 3 5 5 5 6  
SL/VL WIND GUST.7 7 8 8 8 8 8 8 10 10 10 13  
RIDGE WIND DIR..NW NW NW NW N N N NW NW NW NW NW  
RIDGE WIND SPD..8 8 8 7 6 5 3 3 3 5 6 7  
MIX HGT (KFT)...0.4 0.4 1.9 1.9 1.9 6.8 6.8 6.8 9.2 9.2 9.2 8.0  
TRANSP WIND DIR.E E E E E N N N W W W W  
TRANSP WIND SPD.8 8 8 8 8 8 8 8 10 10 10 12  
   
FORECAST DAYS 3 THROUGH 5  
 
   
WEDNESDAY  
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 70S. LIGHT  
WINDS.  
   
THURSDAY  
 
CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 70S. LIGHT WINDS.  
   
FRIDAY  
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 70S. LIGHT  
WINDS.  
 
 
FORECASTER...KF  
REQUESTED BY...JOHN OUTLAND  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2613674.0/STO  
.DELDT 05/17/26  
.FORMATTERVERSION 2.0.0  
.EMAIL JACOB.MCAULIFFE@USDA.GOV  
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