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