099 
FNUS75 KBOI 121759
FWSBOI

Spot Forecast for Quartz Fire...Payette NF
National Weather Service Boise ID
1159 AM MDT Tue Aug 12 2025

Forecast is based on forecast start time of 1159 MDT on August 12. 
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.

...VERY WARM AND DRY TODAY...
...MINIMAL THUNDERSTORM POTENTIAL TONIGHT...
...BREEZY AND SLIGHTLY COOLER ON WEDNESDAY...

.DISCUSSION...
An upper level ridge and surface thermal trough will bring hot
temperatures to the fire today. This combination will also promote
deep vertical mixing. A very weak system tonight will bring a
minimal (around 5% chance) of showers and thunderstorms. On 
Wednesday, upper level winds will increase as the ridge starts to 
break down. These will surface in the afternoon resulting in wind 
gusts of 20 to 25 mph. Expect low afternoon RH today and 
Wednesday with poor overnight RH recovery.


.REST OF TODAY...

Sky/weather.........Sunny. 
Max temperature.....76 to 81. 
Min humidity........25 to 30 percent. 
CWR.................0 percent. 
Wind - 20 foot......West around 7 mph with gusts to around 14 
                    mph. 
Mixing height.......9500 ft AGL. 
Transport winds.....West around 15 mph. 
Ventilation Index...1425 excellent. 

.TONIGHT...

Sky/weather.........Partly cloudy. A 5% chance of showers and 
                    thunderstorms. 
Min temperature.....56 to 61. 
Max humidity........45 to 50 percent. 
CWR.................0 percent. 
Wind - 20 foot......Northwest 4 to 7 mph in the evening, shifting 
                    to north to northeast 3 to 6 mph after midnight. 
Mixing height.......200 ft AGL. 
Transport winds.....North around 5 mph. 
Ventilation Index...10 poor. 

.WEDNESDAY...

Sky/weather.........Sunny. 
Max temperature.....73 to 78. 
Min humidity........21 to 26 percent. 
CWR.................0 percent. 
Wind - 20 foot......West 3 to 7 mph in the morning, shifting to
                    southwest 7 to 13 mph with gusts up to 22 mph  
                    in the afternoon. 
Mixing height.......9000 ft AGL. 
Transport winds.....West around 20 mph. 
Ventilation Index...1800 excellent. 

$$
Forecaster...Tangen
Requested by...Kai Hil
Type of request...WILDFIRE
.TAG 2519673.2/BOI
.DELDT 08/12/25
.FormatterVersion 2.0.0
.EMAIL idpac@firenet.gov