078
FNUS75 KBOI 260450
FWSBOI

Spot Forecast for Second Flat Fire...Oregon Dept. of Emergency Management
National Weather Service Boise ID
1050 PM MDT Sat Jul 25 2026

Forecast is based on forecast start time of 2300 MDT on July 25.
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.

...NORTHWEST WINDS OVERNIGHT WITH RECOVERING RELATIVE HUMIDITY...
...DRY WITH GUSTY SOUTHWEST WINDS DEVELOPING BY SUNDAY AFTERNOON...

.DISCUSSION...
The fire front and town of Burns will keep northwest winds for much
of tonight. Wind speeds will decrease through the night, becoming
light with a more variable direction towards sunrise. Relative
humidity will increase as temperatures cool off tonight. Winds will
set up out of the southwest again on Sunday, starting mid-late morning
with the strongest gusts arriving by mid-afternoon. Winds will be
lighter than what was observed today. Relative humidity will drop in
the afternoon, but not quite as low as today. Another push of northwest
winds will develop Sunday evening around sunset, and is expected to be
stronger than the winds observed tonight.

.REST OF TONIGHT...

Sky/weather.........Mostly clear.
Min temperature.....50 to 55.
Max humidity........55 to 60 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest 7 to 11 mph with gusts to around 18
                    mph through 1AM PDT, decreasing to northwest
                    5 to 8 mph after 1AM PDT.
Mixing height.......200 ft AGL.
Transport winds.....Northwest around 10 mph.
Ventilation Index...20 poor.

.SUNDAY...

Sky/weather.........Sunny.
Max temperature.....89 to 94.
Min humidity........10 to 15 percent.
CWR.................0 percent.
Wind - 20 foot......Northwest around 5 mph in the morning, becoming
                    southwest 6 to 9 mph after 10AM PDT, increasing to
                    southwest 9 to 13 mph with gusts up to 22 mph in the
                    afternoon after 2PM PDT. Winds shifting to the
                    West around sunset, then northwest with gusts up to
                    25 mph possible.
Mixing height.......10000 ft AGL.
Transport winds.....Southwest around 20 mph.
Ventilation Index...2000 excellent.

$$
Forecaster...Groenert
Requested by...William Chapman
Type of request...WILDFIRE
.TAG 2618265.0/BOI
.DELDT 07/25/26
.FormatterVersion 2.0.0
.EMAIL william.j.chapman@oem.oregon.gov