477
FNUS76 KSTO 090519
FWSSTO

Spot Forecast for Gianelli Fire...USFS
National Weather Service Sacramento CA
919 PM PST Sat Nov 8 2025

Forecast is based on forecast start time of 0900 PST on November 09.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mostly sunny and dry conditions are expected at the wildfire on Sunday.
Generally light winds below 5 mph with an occasional gust up to 7 mph
is expected in the afternoon and early evening. Terrain driven winds
will slightly increase overnight, but remain below the 15 mph sustained
threshold and 25 mph gust concern. Based on upper level weather ridging
continuing to develop Sunday - Tuesday, similar winds and sunny
skies are expected through Wednesday morning. By Wednesday night/Thursday
morning, an atmospheric river (AR) is expected to enter the area. At the
wildfire`s elevation, precipitation is forecast to begin as mostly rain, as
the AR is expected to be warm at arrival. Early precipitation estimates
for Wednesday night through Thursday night are around 1.25 to 2.00" inches
of rain. Late Thursday night, rain should transition to snow, as our forecast
snow levels drop to around 7500-8500 feet. The snow total forecast will
likely change the next few days, but an early estimate on the forecast
snow totals (Late Thursday night - Sunday AM) are around 12" inches. Thursday
morning will also see wind gusts potentially up to around 30 mph.

.SUNDAY...

Sky/weather.........Sunny.
Max temperature.....62-66.
Min humidity........28-32 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds up to 5 mph late in the morning
                    becoming light and from the west northwest,
around 2 to 4 mph. Gusts up to around 7 mph.
 Ridgetop...........East around 9 mph shifting to the northwest 3
                    to 6 mph in the late morning and early
                    afternoon, then shifting to the northeast
                    around 5 mph late in the afternoon.
Mixing height.......2200 ft AGL.
Transport winds.....East around 9 mph shifting to the northwest 3
                    to 6 mph in the late morning and early
                    afternoon, then shifting to the northeast
                    around 5 mph late in the afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR PC  MCR MCR MCR MCR MCR PC  PC
CWR.............0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0
Temp............54  61  62  62  63  62  61  58  51
RH..............34  31  31  31  32  34  40  51  54
SL/VL wind dir..NE  W   W   W   NW  NW  NW  N   N
SL/VL wind spd..5   3   3   2   3   3   3   2   2
SL/VL wind gust.8   6   5   6   6   7   6   6   6
Ridge wind dir..E   NW  NW  NW  NW  NW  NW  NE  NE
Ridge wind spd..9   3   3   3   6   6   6   5   5
Mix hgt (kft)...0.2 2.0 2.0 2.0 2.2 2.2 2.2 0.1 0.1
Transp wind dir.E   NW  NW  NW  NW  NW  NW  NE  NE
Transp wind spd.9   3   3   3   6   6   6   5   5

.SUNDAY NIGHT...

Sky/weather.........Partly cloudy then becoming mostly cloudy.
Min temperature.....42-46.
Max humidity........40-44 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming northeast 5 to 9 mph. Winds
should remain below the 15 mph sustained threshold,
and gusts will range from around 7 to 15 mph,
strongest from 8PM to around 2AM.
 Ridgetop...........Northeast around 5 mph shifting to the east 7
                    to 9 mph.
Mixing height.......0 ft AGL.
Transport winds.....East 7 to 9 mph.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......PC  MCR MCR MCR MCR MCR MCR PC  PC  PC  MC  MC
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............49  48  48  48  48  48  47  47  47  47  46  45
RH..............52  49  43  41  41  41  42  42  41  41  40  41
SL/VL wind dir..N   NE  NE  NE  E   E   E   E   E   E   NE  NE
SL/VL wind spd..2   9   9   9   9   9   9   8   8   8   6   6
SL/VL wind gust.6   13  13  13  15  15  15  13  13  13  9   9
Ridge wind dir..NE  E   E   E   E   E   E   E   E   E   E   E
Ridge wind spd..5   9   9   9   9   9   9   8   8   8   7   7
Mix hgt (kft)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.NE  E   E   E   E   E   E   E   E   E   E   E
Transp wind spd.5   9   9   9   9   9   9   8   8   8   7   7

.MONDAY...

Sky/weather.........Mostly sunny.
Max temperature.....62-66.
Min humidity........27-31 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds 5 to 7 mph early in the morning
                    becoming light, then becoming west up to 5 mph
                    early in the afternoon becoming light.
 Ridgetop...........East around 7 mph shifting to the west 5 to 6
                    mph in the late morning and afternoon.
Mixing height.......3500 ft AGL.
Transport winds.....East around 7 mph shifting to the west 5 to 6
                    mph in the late morning and afternoon.
CWR.................0 percent.
Chance of thunder...1 percent.

TIME (PST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC  PC  PC  PC  PC  PC  PC  PC  PC  PC  PC  PC
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............44  44  49  55  60  62  62  62  61  59  57  54
RH..............42  42  38  33  29  28  28  31  36  42  48  51
SL/VL wind dir..NE  NE  NE  NE  NW  NW  NW  W   W   W   W   W
SL/VL wind spd..6   7   7   7   3   3   3   5   5   5   3   3
SL/VL wind gust.9   10  10  10  6   6   6   7   7   7   6   6
Ridge wind dir..E   E   E   E   W   W   W   W   W   W   W   W
Ridge wind spd..7   7   7   7   5   5   5   6   6   6   5   5
Mix hgt (kft)...0.1 0.1 0.1 0.1 2.1 2.1 2.1 3.5 3.5 3.5 0.5 0.5
Transp wind dir.E   E   E   E   W   W   W   W   W   W   W   W
Transp wind spd.7   7   7   7   5   5   5   6   6   6   5   5

$$
Forecaster...JW
Requested by...Charles Daniel
Type of request...WILDFIRE
.TAG 2525452.0/STO
.DELDT 11/09/25
.FormatterVersion 2.0.0
.EMAIL charles.daniel@usda.gov