739
FNUS76 KSTO 151912
FWSSTO

Spot Forecast for North 49...USFS
National Weather Service Sacramento CA
1112 AM PST Mon Dec 15 2025

Forecast is based on ignition time of 1000 PST on December 16.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Onset of precipitation is 7pm to 9pm this evening, with coverage
being isolated. Precipitation chances will increase throughout
Tuesday, with coverage becoming scattered by mid to late morning
and widespread by the afternoon. Winds will be breezy out of the
southwest at 15-20mph. Precipitation continues through Tuesday
night and throughout Wednesday. Sustained winds up to 30mph are
possible Tuesday night and again on Wednesday morning, with a
decrease to 15-20mph by Wednesday afternoon. Further chances for
precipitation through the end of the week and into the weekend.
Forecasted rain for Tuesday through Wednesday is around 0.75-1.25
inches.

.TUESDAY...

Sky/weather.........Mostly cloudy. Rain showers likely in the late
                    morning and early afternoon, then rain showers
                    late in the afternoon.
Max temperature.....48-52.
Min humidity........88-92 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds up to 5 mph.
 Ridgetop...........Southwest 15 to 18 mph.
Mixing height.......1800 ft AGL.
Transport winds.....Southwest 15 to 18 mph.
CWR.................52 percent increasing to 85 percent late in the
                    afternoon.
Chance of thunder...3 percent.

TIME (PST)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC  MC  MC  MC  MC  MC  CDY CDY
CWR.............50  50  50  50  50  50  90  90
Chc of thdr (%).0   0   0   0   0   0   0   0
Temp............46  48  48  48  48  47  46  45
RH..............100 97  93  91  93  96  99  99
SL/VL wind dir..SW  SW  SW  SW  SW  SW  SW  SW
SL/VL wind spd..5   5   5   5   5   5   5   5
SL/VL wind gust.12  12  12  14  14  14  13  13
Ridge wind dir..W   W   W   W   W   SW  SW  SW
Ridge wind spd..16  16  16  18  18  18  15  15
Mix hgt (kft)...1.0 1.0 1.0 1.8 1.8 1.8 0.8 0.8
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW
Transp wind spd.16  16  16  18  18  18  15  15

.TUESDAY NIGHT...

Sky/weather.........Cloudy. Rain showers.
Min temperature.....35-39.
Max humidity........98-100 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds up to 14 mph. Gusts up to 28
                    mph in the late evening and overnight.
 Ridgetop...........Southwest 12 to 20 mph increasing to 23 to 28
                    mph overnight.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 12 to 28 mph increasing to 23 to 28
                    mph overnight.
CWR.................92 percent decreasing to 73 percent after 3 am.
Chance of thunder...11 percent.

TIME (PST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY CDY
CWR.............90  90  90  90  90  90  90  90  90  90  70  70
Chc of thdr (%).0   0   0   0   0   0   0   10  10  10  10  10
Temp............44  43  43  43  43  43  42  42  41  40  39  39
RH..............99  98  99  99  100 100 99  99  99  98  98  99
SL/VL wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
SL/VL wind spd..5   6   6   6   9   9   9   12  12  12  14  14
SL/VL wind gust.13  18  18  18  22  22  22  25  25  25  28  28
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..15  12  12  12  20  20  20  23  23  23  28  28
Mix hgt (kft)...0.8 0.6 0.6 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.6 0.6
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
Transp wind spd.15  12  12  12  20  20  20  23  23  23  28  28

.WEDNESDAY...

Sky/weather.........Cloudy. Rain showers in the morning and early
                    afternoon, then rain showers likely late in the
                    afternoon.
Max temperature.....43-47.
Min humidity........93-97 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds up to 14 mph. Gusts up to 28
                    mph in the morning.
 Ridgetop...........Southwest 21 to 28 mph decreasing to 14 to 18
                    mph in the afternoon.
Mixing height.......2300 ft AGL.
Transport winds.....Southwest 14 to 28 mph decreasing to 14 to 18
                    mph in the afternoon.
CWR.................73 percent decreasing to 1 percent in the late
                    morning and afternoon.
Chance of thunder...11 percent.

TIME (PST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......CDY CDY CDY CDY MC  MC  MC  MC  MC  MC  MC  MC
CWR.............70  70  70  70  0   0   0   0   0   0   0   0
Chc of thdr (%).10  10  10  10  10  10  10  0   0   0   0   0
Temp............40  40  41  42  43  43  44  43  43  41  40  39
RH..............99  100 100 100 100 98  95  94  95  98  100 100
SL/VL wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
SL/VL wind spd..14  12  12  12  9   9   9   7   7   7   5   5
SL/VL wind gust.28  25  25  25  22  22  22  18  18  18  14  14
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..28  28  28  28  21  21  21  18  18  18  14  14
Mix hgt (kft)...0.6 1.6 1.6 1.6 2.3 2.3 2.3 2.3 2.3 2.3 1.2 1.2
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
Transp wind spd.28  28  28  28  21  21  21  18  18  18  14  14

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Showers likely. Lows in the mid 30s. Highs in the mid 40s.
Southwest winds around 7 mph.
.FRIDAY...
Showers. Lows in the mid 30s. Highs in the lower 40s. Southwest
winds around 11 mph.
.SATURDAY...
Showers with snow showers likely. Lows in the lower 30s. Highs in
the mid 40s. Southwest winds around 7 mph.

$$
Forecaster...JS
Requested by...Travis Schneider
Type of request...PRESCRIBED
.TAG 2527727.0/STO
.DELDT 12/15/25
.FormatterVersion 2.0.0
.EMAIL travis.schneider@usda.gov