909
FNUS75 KBYZ 311203
FWSBYZ

Spot Forecast for Allen Fire...USFS
National Weather Service Billings MT
603 AM MDT Sun Aug 31 2025

Forecast is based on forecast start time of 0700 MDT on August 31.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions or concerns with
this forecast.

.DISCUSSION...
Dry conditions with a warming trend expected at the fire site
through Monday. Winds will vary greatly between the top of Black
Butte and the bottom of Medicine Lodge Canyon. Winds on the south
aspect and within the canyon will be terrain driven, while on top
of the butte a northwest wind should prevail. Look for gusts to 20
mph on the upper slopes and ridges today.

.TODAY...

Sky/weather.........Sunny. A few afternoon cumulus.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....65-69.
Min humidity........28-32 percent.
Wind (20 ft)........
 Slope/valley.......Light downslope or northeast 5-9 mph in the
                    morning, becoming south to southwest 10-15 mph
                    by midday. Gusts to 20 mph in the afternoon.
 Ridgetop...........Northwest 10-15 mph. Afternoon gusts to 20 mph.
Mixing height.......Increasing to 7000 ft AGL in the afternoon.
Transport winds.....West to northwest 12 mph.

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Chance of lightning.0 percent.
Min temperature.....47-51.
Max humidity........50-54 percent.
Wind (20 ft)........
 Slope/valley.......Upslope gusts to 20 mph until sunset, then
                    downslope or northeast 6-12 mph.
 Ridgetop...........Northwest around 10 mph. Gusts to 20 mph until
                    sunset.
Mixing height.......Decreasing to 600 ft AGL overnight.
Transport winds.....Northwest to north 8 mph.

.LABOR DAY...

Sky/weather.........Sunny. A few afternoon cumulus.
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....70-74.
Min humidity........22-26 percent.
Wind (20 ft)........
 Slope/valley.......Upslope/upvalley 6-12 mph gusting to 18 mph.
 Ridgetop...........Northwest 5-10 mph.
Mixing height.......Increasing to 7500 ft AGL in the afternoon.
Transport winds.....Northwest 8 mph.

$$
Forecaster...Lester
Requested by...Trae Holliday
Type of request...WILDFIRE
.TAG 2521015.0/BYZ
.DELDT 08/31/25
.FormatterVersion 2.0.0
.EMAIL WYCDC@firenet.gov,trae.holliday@usda.gov