FNUS75 KBOI 221621
FWSBOI

Spot Forecast for Tartar Fire...FS
National Weather Service Boise ID
1021 AM MDT Sat Aug 22 2026

Forecast is based on forecast start time of 1100 MDT on August 22. 
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (208)334-9060, if you have questions
or concerns with this forecast.

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO MIDNIGHT MDT
TONIGHT...

.DISCUSSION...
Unstable conditions today ahead of a cold front. Scattered 
thunderstorms possible this afternoon ahead of a cold front, with 
gusty erratic outflow winds up to 50 mph possible. Drier air moves
into the area on Sunday with dry conditions and westerly flow.

.TODAY...

Sky/weather.........Mostly cloudy. A 20 percent chance of showers 
                    and thunderstorms in the afternoon. Some 
                    thunderstorms may produce gusty winds in the 
                    afternoon. 
Max temperature.....80 to 95. 
Min humidity........15 to 25 percent. 
CWR.................10 percent. 
Wind - 20 foot......South-southwest 7 to 13 mph with gusts to around 24 mph. 
                    Gusty and erratic winds expected near 
                    thunderstorms in the afternoon. 
Mixing height.......9500 ft AGL. 
Transport winds.....Southwest around 15 mph. 
Ventilation Index...1425 excellent. 

.TONIGHT...

Sky/weather.........Mostly cloudy. A 20 percent chance of showers 
                    and thunderstorms in the evening. Patchy 
                    blowing dust in the evening. Some thunderstorms 
                    may produce gusty winds in the evening. 
Min temperature.....56 to 68. 
Max humidity........35 to 50 percent. 
CWR.................10 percent. 
Wind - 20 foot......Southwest 12 to 18 mph with gusts to around 34 
                    mph in the evening shifting to the northwest 7 to 
                    13 mph with gusts to around 22 mph overnight. 
                    Gusty and erratic winds expected near 
                    thunderstorms in the evening. 
Mixing height.......200 ft AGL. 
Transport winds.....Northwest around 10 mph. 
Ventilation Index...20 poor. 

.SUNDAY...

Sky/weather.........Sunny. 
Max temperature.....74 to 89. 
Min humidity........11 to 19 percent. 
CWR.................0 percent. 
Wind - 20 foot......West 4 to 10 mph with gusts to around 18 mph. 
Mixing height.......9000 ft AGL. 
Transport winds.....West around 10 mph. 
Ventilation Index...900 excellent. 

$$
Forecaster...Anderson
Requested by...Shawn Donnelly
Type of request...WILDFIRE
.TAG 2619434.12/BOI
.DELDT 08/22/26
.FormatterVersion 2.0.0
.EMAIL carolinecarlson9@gmail.com