683
FNUS75 KBYZ 041832
FWSBYZ

Spot Forecast for Custer Area Fires...Miles City Dispatch
National Weather Service Billings MT
1232 PM MDT Fri Jul 4 2025

Forecast is based on forecast start time of 1200 MDT on July 04.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

Current isolated showers will increase to scattered showers and
thunderstorms late this afternoon. Showers and thunderstorms will
continue into the overnight hours. Isolated showers will remain
possible after midnight into the early morning hours. The chance
for erratic wind gusts around 40-50 mph with storms increases
after 5 PM to 15%. Saturday, showers and thunderstorms are most
likely after 3 PM. Some storms may be severe. With any afternoon
Saturday storms, there is a 40% chance of gusts greater than 40
mph and a 10% chance of gusts greater than 60 mph.

.REST OF TODAY...

Sky/weather.........Mostly cloudy. Chance of showers and
                    thunderstorms.
CWR.................20 percent.
Chance of lightning.28 percent.
Max temperature.....86-90.
Min humidity........28-32 percent.
Wind (20 ft)........
 Slope/valley.......North winds 5 to 10 mph increasing to northeast
                    10 to 15 mph late afternoon. Gusty and erratic
                    winds expected near thunderstorms.
 Ridgetop...........North around 15 mph.
Mixing height.......9200 ft AGL in the afternoon.
Transport winds.....North around 12 mph.

.TONIGHT...

Sky/weather.........Mostly cloudy. Chance of showers and
                    thunderstorms.
CWR.................40 percent.
Chance of lightning.42 percent.
Min temperature.....60-64.
Max humidity........83-87 percent.
Wind (20 ft)........
 Slope/valley.......East winds 7 to 12 mph shifting to the southwest
                    5 to 10 mph overnight. Gusty and erratic winds
                    expected near thunderstorms.
 Ridgetop...........East around 15 mph shifting to the southwest
                    overnight.
Mixing height.......4400 ft AGL early in the evening decreasing to
                    800 ft AGL overnight.
Transport winds.....East around 10 mph.

.SATURDAY...

Sky/weather.........Mostly sunny. Chance of showers and scattered
                    thunderstorms in the afternoon. Some
                    thunderstorms may be severe.
CWR.................43 percent.
Chance of lightning.39 percent.
Max temperature.....82-86.
Min humidity........43-47 percent.
Wind (20 ft)........
 Slope/valley.......East winds 5 to 10 mph shifting to the north
                    in the afternoon. Gusty and erratic winds
                    expected near thunderstorms.
 Ridgetop...........East around 10 mph shifting to the north in
                    the afternoon.
Mixing height.......200 ft AGL early in the morning increasing to
                    4300 ft AGL in the afternoon.
Transport winds.....Northeast around 10 mph.

$$
Forecaster...Archer
Requested by...Miles City Dispatch
Type of request...WILDFIRE
.TAG 2517249.1/BYZ
.DELDT 07/04/25
.FormatterVersion 2.0.0
.EMAIL mtmcc@firenet.gov