357
FNUS75 KBOI 281357
FWSBOI

Spot Forecast for Big Grass Fire...USFS
National Weather Service Boise ID
757 AM MDT Tue Jul 28 2026

Forecast is based on forecast start time of 1200 MDT on July 28.
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.

...HOT, DRY, AND BREEZY AFTERNOON WINDS TODAY THROUGH FRIDAY...

.DISCUSSION...
High pressure will continue hot, dry, and breezy conditions over
the next several days. Generally diurnally driven winds with
southeasterly winds in the morning and evening and west-northwesterly
winds in the afternoon. Poor RH recoveries expected each night. No
significant shift in the pattern until the weekend with the
potential passage of a dry front. This pattern will likely bring
gusty westerly winds on Saturday and Sunday.

.REST OF TODAY...

Sky/weather.........Sunny.
Max temperature.....89 to 94.
Min humidity........7 to 12 percent.
CWR.................0 percent.
Wind - 20 foot......Southeast 5 to 9 mph becoming west-northwest 8 to
                    12 mph around 11 AM with gusts to around 20 mph.
Mixing height.......8000 ft AGL.
Transport winds.....West around 10 mph.

.TONIGHT...

Sky/weather.........Partly cloudy.
Min temperature.....60 to 65.
Max humidity........20 to 30 percent.
CWR.................0 percent.
Wind - 20 foot......Southeast 4 to 10 mph with gusts to 15 mph.
Mixing height.......100 ft AGL.
Transport winds.....North around 10 mph.

.WEDNESDAY...

Sky/weather.........Sunny.
Max temperature.....92 to 99.
Min humidity........10 to 15 percent.
CWR.................0 percent.
Wind - 20 foot......West 4 to 9 mph. Gusts up to 18 mph in the
                    afternoon.
Mixing height.......9500 ft AGL.
Transport winds.....Southwest around 10 mph.

$$
Forecaster...Smith
Requested by...Matt Brown FBAN
Type of request...WILDFIRE
.TAG 2618438.1/BOI
.DELDT 07/28/26
.FormatterVersion 2.0.0
.EMAIL matt.brown@sccfd.org