456
FNUS76 KSTO 092331
FWSSTO

Spot Forecast for CA-SHF Green Fire...Shasta Trinity National Forest
National Weather Service Sacramento CA
431 PM PDT Sat Aug 9 2025

Forecast is based on forecast start time of 0600 PDT on August 10.
If conditions become unrepresentative...contact the National Weather
Service.

...Hot Temperatures and Low Relative Humidity through Monday...

.DISCUSSION...
A hot and dry airmass will bring above normal temperatures, low
daytime humidity, and poor overnight recoveries in the vicinity of
the Green Fire through Monday. Winds expected to follow
diurnal trends, with north-northeast gusts 15 mph late Sunday evening
and overnight, tapering off by late Monday morning. A cooling
trend and improved RH recoveries are anticipated from Tuesday
onward, although dry weather looks to continue.

.SUNDAY...

Sky/weather.........Mostly sunny.
Max temperature.....101-105.
Min humidity........10-14 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds up to 6 mph early in the
                    morning becoming light.
 Ridgetop...........Northeast 5 to 13 mph shifting to the southwest
                    3 to 5 mph late in the afternoon.
Mixing height.......Increasing to 9200 ft AGL.
Transport winds.....Northeast 5 to 13 mph shifting to the southwest
                    3 to 5 mph late in the afternoon.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM         10 AM        2 PM
Sky cover.......MCLEAR       PCLDY        MCLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............73           88           102
RH..............28           21           13
SL/VL wind......N 5G10       NE 3G9       S 3G10
Ridgetop wind...N 13         NE 10        SW 3
Mix hgt (ft)....800          1700         9200
Transport wind..N 13         NE 10        SW 3

.SUNDAY NIGHT...

Sky/weather.........Mostly clear.
Min temperature.....70-74.
Max humidity........30-35 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........Southwest around 5 mph shifting to the
                    northeast 5 to 7 mph overnight.
Mixing height.......Falling to around 800 ft AGL.
Transport winds.....Southwest around 5 mph shifting to the
                    northeast 5 to 7 mph overnight.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 PM         10 PM        2 AM
Sky cover.......MCLEAR       MCLEAR       CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............101          85           78
RH..............13           23           31
SL/VL wind......SW 3G10      S 2G6        NE 2G6
Ridgetop wind...SW 5         S 6          NE 5
Mix hgt (ft)....5800         800          800
Transport wind..SW 5         S 6          NE 5

.MONDAY...

Sky/weather.........Sunny.
Max temperature.....101-105.
Min humidity........13-17 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming southwest up to 5 mph late
                    in the afternoon.
 Ridgetop...........Northeast 8 mph shifting to the southwest
                    3 to 8 mph late in the morning.
Mixing height.......Increasing to 7200 ft AGL.
Transport winds.....Northeast 8 mph shifting to the southwest
                    3 to 8 mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM         10 AM        2 PM
Sky cover.......CLEAR        CLEAR        CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............73           86           101
RH..............33           27           17
SL/VL wind......NE 2G6       NE 3G7       SW 5G12
Ridgetop wind...NE 7         NE 8         SW 8
Mix hgt (ft)....800          700          6700
Transport wind..NE 7         NE 8         SW 8

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Clear. Lows in the lower 70s. Highs in the upper 90s. Light
winds.
.WEDNESDAY...
Clear. Lows in the upper 60s. Highs in the lower 90s. Light
winds.
.THURSDAY...
Clear. Lows in the mid 60s. Highs in the upper 80s. Light winds.

$$
Forecaster...IDS
Requested by...Hannah Haley
Type of request...WILDFIRE
.TAG 2519147.4/STO
.DELDT 08/09/25
.FormatterVersion 2.0.0
.EMAIL robert.holt@usda.gov,hannah.haley1@usda.gov