671
FNUS76 KSTO 290251
FWSSTO

Spot Forecast for Alder Springs Under Burn...USFS
National Weather Service Sacramento CA
751 PM PDT Wed Oct 28 2026

Forecast is based on ignition time of 0700 PDT on October 29.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Dry weather continues on Thursday with light winds expected.
Afternoon humidity values stay in the 30s with highs in the 50s.
Friday will see a slight uptick in humidity trends, getting into
the 40s on Friday and breezy south winds at times Friday
afternoon.

Nonzero precip chances continue for the weekend (20-30%) but
impacts will be light and minimal if any. Current forecast have
0.01-0.05" on Saturday but most likely scenario will be increased
cloud cover and humidity with virga.

.THURSDAY...

Sky/weather.........Mostly cloudy. Haze in the morning.
Max temperature.....53-57.
Min humidity........31-35 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southeast up to 5 mph late
                    in the afternoon.
 Ridgetop...........West winds 3 to 6 mph becoming southeast 5 to 8
                    mph in the afternoon.
Mixing height.......Increasing up to 2700 ft AGL.
Transport winds.....Light west winds shift to the southeast
                    in the afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......CDY MC  MC  MC  MC  MC  MC  MC  MC  MC  CDY
Temp............45  43  44  50  53  54  55  54  53  53  50
RH..............43  47  49  43  39  39  39  39  41  43  45
SL/VL wind dir..W   W   SW  SE  E   E   E   E   SE  SE  S
SL/VL wind spd..1   1   1   1   2   3   5   5   5   5   3
SL/VL wind gust.2   2   2   3   5   7   9   12  12  10  9
Ridge wind dir..W   W   SW  SE  E   E   E   E   SE  SE  S
Ridge wind spd..3   3   3   3   5   5   5   6   6   6   5
Mix hgt (kft)...0.5 0.5 0.5 0.5 1.9 1.9 1.9 2.7 2.7 2.7 1.1
Transp wind dir.W   W   SW  SE  E   E   E   E   SE  SE  S
Transp wind spd.3   3   3   3   5   5   5   6   6   6   5

.THURSDAY NIGHT...

Sky/weather.........Mostly cloudy then becoming mostly clear.
Min temperature.....35-39.
Max humidity........66-70 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........South 5 to 8 mph shifting to the west late in
                    the evening.
Mixing height.......Decreasing as low as 400 ft AGL.
Transport winds.....South 3 to 6 mph shifting to the west
                    around 5 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.......CDY CDY MC  MC  MC  MC  MC  MC  MCR MCR MCR MCR
Temp............47  46  46  44  43  42  42  41  41  40  41  39
RH..............51  52  51  54  55  58  61  63  64  65  63  64
SL/VL wind dir..S   S   W   W   W   W   W   W   W   W   W   W
SL/VL wind spd..3   3   2   2   2   1   1   1   2   2   2   2
SL/VL wind gust.9   9   6   6   6   5   5   5   5   5   5   5
Ridge wind dir..S   S   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..7   6   5   5   5   5   6   6   5   5   5   5
Mix hgt (kft)...1.1 1.1 0.4 0.4 0.4 0.5 0.5 0.5 0.4 0.4 0.4 0.4
Transp wind dir.S   S   W   W   W   W   W   W   W   W   W   W
Transp wind spd.6   5   5   5   5   6   6   6   5   5   5   5

.FRIDAY...

Sky/weather.........Mostly sunny. Areas of frost early in the
                    morning.
Max temperature.....50-54.
Min humidity........40-46 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southeast 5 to 8 mph late
                    in the afternoon with gusts up to 15 mph.
 Ridgetop...........West around 5 mph shifting to the southeast 5
                    to 10 mph late in the morning.
Mixing height.......Increasing to 5000 ft AGL.
Transport winds.....West around 5 mph shifting to the southeast 5
                    to 8 mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR PC
Temp............39  37  37  40  44  48  50  51  51  51  50  49
RH..............64  66  68  63  56  49  45  44  46  48  50  52
SL/VL wind dir..W   W   W   W   W   SE  SE  SE  SE  SE  SE  S
SL/VL wind spd..2   2   2   2   2   3   3   3   6   6   6   3
SL/VL wind gust.5   5   5   5   5   7   7   7   14  14  14  10
Ridge wind dir..W   W   W   W   W   SE  SE  SE  SE  SE  SE  S
Ridge wind spd..5   5   5   5   5   6   6   7   9   7   7   6
Mix hgt (kft)...0.4 0.4 0.4 0.4 0.4 3.0 3.0 3.0 5.0 5.0 5.0 2.8
Transp wind dir.W   W   W   W   W   SE  SE  SE  SE  SE  SE  S
Transp wind spd.5   5   5   5   5   6   6   6   8   7   7   6

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Mostly cloudy with slight chance of rain. Lows in the upper 30s.
Highs in the upper 40s. Light winds.
.SUNDAY...
Mostly clear. Chance of rain. Lows in the mid 30s. Highs in the
lower 50s. Northwest winds around 5 mph.
.MONDAY...
Mostly clear. Lows around 40. Highs in the mid 50s. Light winds.

$$
Forecaster...DA
Requested by...Brad Tovar
Type of request...PRESCRIBED
.TAG 2624436.3/STO
.DELDT 10/29/26
.FormatterVersion 2.0.0
.EMAIL adam.coronado@usda.gov,william.bettencourt@usda.gov,bradford.tovar@usda.gov