042 
FNUS75 KBOI 271109
FWSBOI

Spot Forecast for Rock Fire...USFS
National Weather Service Boise ID
509 AM MDT Sat Sep 27 2025

Forecast is based on forecast start time of 0700 MDT on September 27. 
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.

...DRY AND WARM UNTIL SUNDAY EVENING...
...COLDER WITH WETTING RAINS BEGINNING SUNDAY NIGHT...

.DISCUSSION...
Warming to 10 degrees above normal by Sunday afternoon, with 
consistent dryness and mild winds. Sunday evening precipitation 
chances increase through Friday. CWRs stay above 60-80% for multiple 
days early this week, while temps cool 5-10 degrees each day to 
Wednesday. Embedded storms are possible in widespread showers. Min
RHs sharply moisten Monday to 70%.

.REST OF TODAY...

Sky/weather.........Sunny. 
Max temperature.....60 to 65. 
Min humidity........24 to 29 percent. 
CWR.................0 percent. 
Wind - 20 foot......South around 6 mph. 
Mixing height.......2500 ft AGL. 
Transport winds.....South around 10 mph. 
Ventilation Index...250 fair. 

.TONIGHT...

Sky/weather.........Mostly clear. 
Min temperature.....49 to 54. 
Max humidity........32 to 39 percent. 
CWR.................0 percent. 
Wind - 20 foot......South around 6 mph. 
Mixing height.......100 ft AGL. 
Transport winds.....South around 5 mph. 
Ventilation Index...5 poor. 

.SUNDAY...

Sky/weather.........Sunny. 
Max temperature.....63 to 69. 
Min humidity........23 to 28 percent. 
CWR.................0 percent. 
Wind - 20 foot......South around 7 mph. 
Mixing height.......5000 ft AGL. 
Transport winds.....South around 15 mph. 
Ventilation Index...750 excellent. 

$$
Forecaster...Macfarlane
Requested by...Jason Pendleton
Type of request...WILDFIRE
.TAG 2522617.0/BOI
.DELDT 09/27/25
.FormatterVersion 2.0.0
.EMAIL Jason.Pendleton@usda.gov