265 
FNUS75 KBOI 230949
FWSBOI

Spot Forecast for Rock fire...USFS
National Weather Service Boise ID
349 AM MDT Tue Sep 23 2025

Forecast is based on forecast start time of 0700 MDT on September 23. 
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.

...CLEAR SKY (EXCEPT SMOKY) AND DRY...

.DISCUSSION...
Upper level high pressure in eastern OR will bring warmer 
temps and continued clear sky through Wednesday, but will
also limit ventilation.  Surface high pressure in nw MT and
low pressure in western WA and OR will maintain northeast 
wind above the surface through Wednesday, but terrain-driven 
at the surface.  Smoke from wildfire in WA should decrease 
from NE to SW during the day today.

.REST OF TODAY...

Sky/weather.........Sunny. 
Max temperature.....59 to 65. 
Min humidity........29 to 35 percent. 
CWR.................0 percent. 
Wind - 20 foot......Southwest 3 to 6 mph. 
Mixing height.......3000 ft AGL. 
Transport winds.....Southwest around 5 mph. 
Ventilation Index...150 poor. 

.TONIGHT...

Sky/weather.........Mostly clear. 
Min temperature.....48 to 53. 
Max humidity........41 to 51 percent. 
CWR.................0 percent. 
Wind - 20 foot......South 3 to 6 mph. 
Mixing height.......100 ft AGL. 
Transport winds.....Southeast around 5 mph. 
Ventilation Index...5 poor. 

.WEDNESDAY...

Sky/weather.........Sunny. 
Max temperature.....64 to 70. 
Min humidity........23 to 29 percent. 
CWR.................0 percent. 
Wind - 20 foot......Southwest 3 to 6 mph. 
Mixing height.......3500 ft AGL. 
Transport winds.....Southwest around 5 mph. 
Ventilation Index...175 poor. 

$$
Forecaster...Colin
Requested by...Jason Pendleton
Type of request...WILDFIRE
.TAG 2522361.0/BOI
.DELDT 09/23/25
.FormatterVersion 2.0.0
.EMAIL jason.pendleton@usda.gov