209 
FNUS76 KSTO 162313
FWSSTO

Spot Forecast for CA-SHF Green Fire...Shasta Trinity National Forest
National Weather Service Sacramento CA
413 PM PDT Sat Aug 16 2025

Forecast is based on forecast start time of 1700 PDT on August 16. 
If conditions become unrepresentative...contact the National Weather
Service.

...Slight chance of isolated thunderstorms through Sunday morning...

.DISCUSSION...
Shower and isolated thunderstorm chances expected through early 
Sunday morning as a quick moving weather system passes through. 
Highest chances in the Green Fire vicinity expected between 6 pm 
and 10 pm this evening, with additional low, but still nonzero, 
chances returning after 3 am. Primarily wet thunderstorms 
expected. Otherwise, near to below normal temperatures continue 
this weekend alongside diurnal wind trends. A trend toward warmer 
and drier weather is then anticipated moving into the week ahead. 

.REST OF TODAY...

Sky/weather.........Mostly cloudy. Chance of showers and slight 
                    chance of thunderstorms. 
Max temperature.....84-89. 
Min humidity........33-38 percent. 
Wind (20 ft)........ 
 Slope/valley.......Southwest winds up to 5 mph. Gusty and erratic 
                    winds expected near thunderstorms. 
 Ridgetop...........Southwest around 14 mph. 
Mixing height.......Near 5600 ft AGL. 
Transport winds.....Southwest around 14 mph. 
CWR.................8 percent. 
Chance of thunder...23 percent. 

TIME (PDT)      5 PM         
Sky cover.......MCLDY        
CWR.............8            
Chc of thdr (%).23           
Temp............86           
RH..............36           
SL/VL wind......SW 5G13      
Ridgetop wind...SW 14         
Mix hgt (ft)....5600         
Transport wind..SW 14        

.TONIGHT...

Sky/weather.........Partly cloudy early, becoming mostly cloudy 
                    through the evening. Chance of showers and 
                    isolated thunderstorms in the evening. Slight
                    chance of isolated showers and thunderstorms 
                    overnight.  
Min temperature.....61-66. 
Max humidity........80-85 percent. 
Wind (20 ft)........ 
 Slope/valley.......Light winds. Gusty and erratic winds expected 
                    near thunderstorms in the evening and overnight. 
 Ridgetop...........Southwest 6 to 14 mph. 
Mixing height.......Falling to near 800 ft AGL overnight. 
Transport winds.....South 6 to 14 mph. 
CWR.................10 percent increasing to 17 percent late in the 
                    evening. 
Chance of thunder...23 percent. 

TIME (PDT)      6 PM         10 PM        2 AM         
Sky cover.......CLOUDY       MCLDY        MCLDY        
CWR.............10           20           15           
Chc of thdr (%).20           15           10            
Temp............83           74           69           
RH..............41           63           73           
SL/VL wind......SW 3G12      W 2G6        S 2G5        
Ridgetop wind...SW 14        SW 7         S 6        
Mix hgt (ft)....5600         900          800          
Transport wind..SW 14        SW 7         S 6          

.SUNDAY...

Sky/weather.........Partly cloudy early, then becoming mostly sunny
                    late in the morning.
Max temperature.....80-85. 
Min humidity........38-43 percent. 
Wind (20 ft)........ 
 Slope/valley.......Light winds becoming southwest up to 6 mph late 
                    in the morning. 
 Ridgetop...........Southwest 8 to 15 mph. 
Mixing height.......Rising to near 5800 ft AGL by the afternoon. 
Transport winds.....Southwest 8 to 15 mph. 
CWR.................10 percent early in the morning, falling to 0
                    percent by midday. 
Chance of thunder...5 percent early in the morning, falling to 0
                    percent by midday. 

TIME (PDT)      6 AM         10 AM        2 PM         
Sky cover.......PCLDY        PCLDY        MCLEAR       
CWR.............10           10           0            
Chc of thdr (%).10           10           0            
Temp............65           70           80           
RH..............82           76           52           
SL/VL wind......SW 2G5       SW 3G8       SW 6G15      
Ridgetop wind...S 8          SW 8         S 15          
Mix hgt (ft)....1000         2300         5800         
Transport wind..S 8          SW 8         S 15          

$$
Forecaster...NR
Requested by...Hannah Haley
Type of request...WILDFIRE
.TAG 2519147.11/STO
.DELDT 08/16/25
.FormatterVersion 2.0.0
.EMAIL hannah.haley1@usda.gov,robert.holt@usda.gov