269
FNUS76 KSTO 310728
FWSSTO

Spot Forecast for Motherlode Crew Readiness Exercise...CalFire
National Weather Service Sacramento CA
1228 AM PDT Thu Jul 31 2025

Forecast is based on ignition time of 0900 PDT on August 04.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Near normal temperatures through the weekend and early next week, with
periodically breezy onshore flow. At the site of the exercise, winds
will be strongest in the afternoons with gusts occaisionally up to
15 mph from the west. Light and variable winds expected overnight.
Relative humidities will be in the 20 to 30% range during the day with
moderate recoveries overnight.

.MONDAY...

Sky/weather.........Sunny.
Max temperature.....85-89.
Min humidity........28-33 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west 5 to 9 mph late in
                    the morning with gusts up to 15 mph in the
afternoon.
 Ridgetop...........West 3 to 9 mph.
Mixing height.......5200 ft AGL.
Transport winds.....West 3 to 9 mph.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      9 AM         1 PM         5 PM
Sky cover.......MCLEAR       CLEAR        MCLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............68           80           86
RH..............56           37           30
SL/VL wind......SW 2G5       W 6G12       W 7G15
Ridgetop wind...W 3          SW 8         W 7
Mix hgt (ft)....1200         2600         5200
Transport wind..W 3          SW 8         W 7

.TUESDAY...

Sky/weather.........Sunny.
Max temperature.....89-93.
Min humidity........24-29 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west 5 to 7 mph late in
                    the morning.
 Ridgetop...........North 2 to 6 mph shifting to the west around 7
                    mph late in the morning.
Mixing height.......6000 ft AGL.
Transport winds.....North 2 to 6 mph shifting to the west around 7
                    mph late in the morning.
CWR.................0 percent.
Chance of thunder...0 percent.

TIME (PDT)      6 AM         10 AM        2 PM
Sky cover.......MCLEAR       MCLEAR       CLEAR
CWR.............0            0            0
Chc of thdr (%).0            0            0
Temp............62           74           87
RH..............65           45           30
SL/VL wind......NE 2G3       NW 2G5       W 7G14
Ridgetop wind...NE 5         N 2          SW 7
Mix hgt (ft)....400          1200         4400
Transport wind..NE 5         N 2          SW 7

$$
Forecaster...SP
Requested by...T. Kelly
Type of request...PRESCRIBED
.TAG 2518874.0/STO
.DELDT 07/31/25
.FormatterVersion 2.0.0
.EMAIL tim.kelly@fire.ca.gov