479 
FNUS76 KSTO 210918
FWSSTO

Spot Forecast for Big Hill 69...USFS
National Weather Service Sacramento CA
218 AM PDT Sun Sep 21 2025

Forecast is based on ignition time of 0700 PDT on September 21. 
If conditions become unrepresentative...contact the National Weather
Service.

...Isolated Thunderstorms Today...

...Periodically Breezy East Winds and Lowering Humidity Early This
Week...

.DISCUSSION...
Isolated showers or thunderstorms (10-15% probability) today, 
with a 5-10% chance of 0.10 inches or more of precipitation. 
Periodically breezy winds will develop each afternoon, with gusts 
of 15 mph. Stronger easterly winds develop Monday night through 
Tuesday morning, with gusts up to 20-25 mph. Otherwise, a warming
and drying trend is expected early this week along with lowering 
humidity. Potential for isolated afternoon/evening thunderstorms 
late this week (10% probability).

.TODAY...

Sky/weather.........Sunny. 
Max temperature.....64-68. 
Min humidity........45-49 percent. 
Wind (20 ft)........ 
 Slope/valley.......West winds 5 to 8 mph with gusts 15 mph. 
 Ridgetop...........West around 6 to 10 mph. 
Mixing height.......Rising to 6000 ft AGL by the afternoon.
Transport winds.....West around 6 to 10 mph. 
CWR.................4 percent. 
Chance of thunder...15 percent. 

.TONIGHT...

Sky/weather.........Mostly clear. 
Min temperature.....48-52. 
Max humidity........60-64 percent. 
Wind (20 ft)........ 
 Slope/valley.......West winds 5 to 7 mph shifting to the southeast 
                    5 to 9 mph overnight. 
 Ridgetop...........West 7 to 9 mph shifting to the north around 7 
                    mph late in the evening, then shifting to the 
                    east around 10 mph overnight. 
Mixing height.......0 ft AGL. 
Transport winds.....West 7 to 9 mph shifting to the north around 7 
                    mph late in the evening, then shifting to the 
                    east around 10 mph overnight.
CWR.................1 percent. 
Chance of thunder...2 percent. 

.MONDAY...

Sky/weather.........Sunny. 
Max temperature.....68-72. 
Min humidity........25-29 percent. 
Wind (20 ft)........ 
 Slope/valley.......East winds 5 to 10 mph with gusts 15 mph. 
 Ridgetop...........East around 8 to 13 mph. 
Mixing height.......Rising to 4300 ft AGL by the afternoon.
Transport winds.....East around 8 to 13 mph. 
CWR.................0 percent. 
Chance of thunder...0 percent. 

.FORECAST DAYS 3 THROUGH 7...
.TUESDAY...
Clear. Lows in the lower 50s. Highs in the lower 70s. East winds
around 13 mph. 
.WEDNESDAY...
Mostly clear. Slight chance of showers. Lows in the lower 50s.
Highs in the lower 70s. East winds around 10 mph. 
.THURSDAY...
Partly cloudy. Slight chance of showers. Lows in the mid 50s.
Highs in the lower 70s. Northeast winds around 6 mph. 
.FRIDAY...
Partly cloudy. Lows in the mid 50s. Highs around 70. 
.SATURDAY...
Mostly clear. Lows in the lower 50s. Highs in the upper 60s. 

.OUTLOOK FOR SUNDAY SEPTEMBER 28 THROUGH SATURDAY OCTOBER 04...
The Climate Prediction Center's 8-14 Day outlook favors above 
normal temperatures (40-50% probability) and above normal 
precipitation (40-50% probability) for late September through 
early October.

$$
Forecaster...IDS
Requested by...Chris Enriquez
Type of request...PRESCRIBED
.TAG 2522031.2/STO
.DELDT 09/21/25
.FormatterVersion 2.0.0
.EMAIL Christian.enriquez@usda.gov