471
FNUS75 KBYZ 182047
FWSBYZ

Spot Forecast for Davis Coulee...BIA-Crow
National Weather Service Billings MT
247 PM MDT Fri Sep 18 2026

Forecast is based on forecast start time of 1700 MDT on September 18.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...

...Flood Watch this evening through Sunday afternoon...

Slow moving showers with embedded thunderstorms move in this
evening. There may be brief breaks in precipitation, but overall,
showers and occasional thunderstorms will continue into Sunday
afternoon. Widespread rainfall amounts of 1 to 2 inches are
expected, with locally higher amounts of 4+ inches under particularly
slow moving and persistent thunderstorms. Any stronger storms will
be capable of producing erratic wind gusts up to 50 mph. Winds
increase Saturday, with gusts up to 25 mph out of the north to
northwest by the afternoon. Monday into next week trends warmer and
drier.

.TONIGHT...

Sky/weather.........Cloudy. Rain showers and chance of thunderstorms
                    through the night. Patchy fog overnight. Some
thunderstorms may produce heavy rainfall.
CWR.................90 percent.
Chance of lightning.37 percent.
Min temperature.....53-57.
Max humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......North winds 5 to 10 mph becoming light overnight.
Gusty and erratic winds near thunderstorms.
 Ridgetop...........North around 10 mph.
Mixing height.......Decreasing to 500 ft AGL overnight.
Transport winds.....North around 10 mph.

.SATURDAY...

Sky/weather.........Mostly cloudy. Rain showers and chance of
                    thunderstorms. Some thunderstorms may produce
                    heavy rainfall.
CWR.................89 percent.
Chance of lightning.41 percent.
Max temperature.....62-66.
Min humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......North winds 5 to 8 mph increasing to 10 to 15 with
gusts up to 25 mph in the afternoon. Gusty and
erratic winds near thunderstorms.
 Ridgetop...........North around 10 mph increasing to 15 to 25 mph.
Mixing height.......Increasing to 2300 ft AGL in the afternoon.
Transport winds.....North 10 to 20 mph.

.SATURDAY NIGHT...

Sky/weather.........Cloudy. Rain showers and chance of
                    thunderstorms in the evening, then rain showers
                    likely overnight. Some thunderstorms may
                    produce heavy rainfall.
CWR.................88 percent.
Chance of lightning.30 percent.
Min temperature.....49-53.
Max humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 5 to 15 mph with gusts up to 25
mph. Gusty and erratic winds near thunderstorms.
 Ridgetop...........Northwest 15 to 25 mph.
Mixing height.......Decreasing to 600 ft AGL overnight.
Transport winds.....Northwest 15 to 25 mph.

.SUNDAY...

Sky/weather.........Cloudy. Rain showers in the morning, then rain
                    showers likely and slight chance of
                    thunderstorms in the afternoon. Some
                    thunderstorms may produce heavy rainfall.
CWR.................70 percent.
Chance of lightning.19 percent.
Max temperature.....61-65.
Min humidity........87-91 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 13 mph. Gusty and erratic winds
                    expected near thunderstorms.
 Ridgetop...........West 10 to 15 mph.
Mixing height.......Increasing to 2500 ft AGL in the afternoon.
Transport winds.....West 10 to 15 mph.

.FORECAST DAYS 3 THROUGH 7...
.MONDAY...
Mostly cloudy. Chance of showers. Lows in the upper 40s. Highs in
the lower 70s. Light winds.
.TUESDAY...
Mostly clear. Lows in the upper 40s. Highs in the upper 70s.
Light winds.
.WEDNESDAY...
Partly cloudy. Lows around 50. Highs around 80. Light winds.
.THURSDAY...
Mostly clear. Lows in the upper 40s. Highs in the lower 80s.
.FRIDAY...
Partly cloudy. Lows around 50. Highs in the lower 80s.

$$
Forecaster...Archer
Requested by...Trasia
Type of request...WILDFIRE
.TAG 2621871.7/BYZ
.DELDT 09/18/26
.FormatterVersion 2.0.0
.EMAIL rhayner@blm.gov,mtbdc@firenet.gov,dsciacca@mt.gov,anna_sammer@firenet.gov,jludikhuize@sheridancountywy.gov,garretcosta71@gmail.com