278
FNUS76 KSTO 052027
FWSSTO

Spot Forecast for CA-SHF Green Fire...Shasta Trinity National Forest
National Weather Service Sacramento CA
127 PM PDT Tue Aug 5 2025

Forecast is based on forecast start time of 0800 PDT on August 06.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Continued diurnal wind trends expected with southwest winds in the
afternoon shifting to the north-northeast overnight into the early
morning. Lowest daytime humidity midweek will be in the upper
teens to low 20s with drier weather forecasted Friday onward into
the low teens.

.WEDNESDAY...

Sky/weather.........Sunny.
Max temperature.....88-92.
Min humidity........18-22 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest 5 to 8 mph late
                    in the afternoon.
 Ridgetop...........Light winds shifting to the southwest 9 to 14
                    mph in the afternoon.
Mixing height.......7300 ft AGL.
Transport winds.....Southeast around 3 mph shifting to the
                    southwest 7 to 10 mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      8 AM         NOON         4 PM
Sky cover.......MCLEAR       PCLDY        MCLEAR
CWR.............0            0            0
Temp............68           84           90
RH..............43           28           21
SL/VL wind......N 3G8        SW 2G8       SW 5G10
Ridgetop wind...NE 6         SW 8         SW 10
Mix hgt (ft)....2500         5600         7300
Transport wind..SE 3         SW 7         SW 10

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear.
Min temperature.....64-68.
Max humidity........49-53 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds up to 5 mph early in the
                    evening becoming light, then becoming northeast
                    4 to 8 mph early in the morning.
 Ridgetop...........West 5 to 10 mph shifting to the north 6 to 11
                    mph by early morning.
Mixing height.......800 ft AGL.
Transport winds.....Southwest around 10 mph shifting to the west in
                    the evening, then shifting to the north 8 to 13
                    mph by early morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 PM         10 PM        2 AM
Sky cover.......MCLEAR       PCLDY        PCLDY
CWR.............0            0            0
Temp............89           75           70
RH..............22           37           49
SL/VL wind......SW 5G11      W 2G8        NE 3G10
Ridgetop wind...SW 9         W 6          NE 8
Mix hgt (ft)....5900         800          800
Transport wind..SW 10        W 5          N 12

.THURSDAY...

Sky/weather.........Sunny.
Max temperature.....90-94.
Min humidity........19-23 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds 5 to 8 mph in the morning
                    becoming light southwest winds.
 Ridgetop...........Northeast around 10 mph shifting to the
                    southwest 7 to 10 mph by the early afternoon.
Mixing height.......8700 ft AGL.
Transport winds.....North around 13 mph shifting to the northeast
                    in the morning, then shifting to the southwest
                    7 to 10 mph by the early afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM         10 AM        2 PM
Sky cover.......MCLEAR       CLEAR        MCLEAR
CWR.............0            0            0
Temp............67           79           90
RH..............52           41           26
SL/VL wind......NE 5G10      N 4G8        SW 4G9
Ridgetop wind...NE 10        N 8          SW 8
Mix hgt (ft)....800          1400         8200
Transport wind..N 13         NE 11        SW 7

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Mostly clear. Lows in the mid 60s. Highs in the upper 90s. North
winds around 5 mph.
.SATURDAY...
Mostly clear. Lows in the upper 60s. Highs around 101. Northeast
winds around 5 mph.
.SUNDAY...
Mostly clear. Lows around 70. Highs around 102. Light winds.

$$
Forecaster...DA
Requested by...Frank Bojorquez
Type of request...WILDFIRE
.TAG 2519147.1/STO
.DELDT 08/05/25
.FormatterVersion 2.0.0
.EMAIL robert.holt@usda.gov,frank.bojorquez@usda.gov