978
FNUS75 KBYZ 171959
FWSBYZ

Spot Forecast for Davis Coulee...BIA-Crow
National Weather Service Billings MT
159 PM MDT Thu Sep 17 2026

Forecast is based on forecast start time of 1800 MDT on September 17.
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 Friday evening through Sunday...

Isolated light showers may move into the fire area from the south
through 9pm this evening. Otherwise expect southerly winds and
strong RH recoveries tonight, with patchy fog possible by morning.
Dry start to the day with mostly sunny skies. Temperatures climb
to near 80 degrees with MinRH values dropping into the upper 30s.
By 4pm expect scattered showers and thunderstorms to approach from
the southwest. This will usher in a very wet period that will
last through Sunday evening. 1 to 2 inches of rain is in the
forecast during this period, with the potential for up to 4 inches
if a few rounds of thunderstorms move through. Chambers

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming mostly clear. Isolated
                    light showers through 9pm. Patchy fog overnight.
CWR.................2 percent.
Chance of lightning.0 percent.
Min temperature.....53-57.
Max humidity........94-98 percent.
Wind (20 ft)........
 Slope/valley.......South winds 5 to 10 mph.
 Ridgetop...........South around 8 mph.
Mixing height.......400 ft AGL overnight.
Transport winds.....South around 10 mph.

.FRIDAY...

Sky/weather.........Patchy fog in the morning otherwise mostly sunny.
                    Rain showers likely and isolated thunderstorms after
                    4pm.
CWR.................7 percent.
Chance of lightning.20 percent.
Max temperature.....78-83.
Min humidity........35-40 percent.
Wind (20 ft)........
 Slope/valley.......South winds 5 to 10 mph shifting to the
                    north 8 to 15 mph after 10am. Gusty and
                    erratic winds expected near thunderstorms in
                    the afternoon.
 Ridgetop...........South around 10 mph in the morning, shifting
                    to the North around 10 am.
Mixing height.......6300 ft AGL in the afternoon.
Transport winds.....Southwest around 8 mph.

.FRIDAY NIGHT...

Sky/weather.........Cloudy. Scattered showers and thunderstorms in
                    the evening. Rain showers and isolated
                    thunderstorms through the night. Thunderstorms
                    may produce heavy rainfall.
CWR.................86 percent.
Chance of lightning.36 percent.
Min temperature.....55-60.
Max humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds 5 to 10 mph. Gusty and erratic
                    winds expected near thunderstorms.
 Ridgetop...........Northeast around 10 mph.
Mixing height.......400 ft AGL overnight.
Transport winds.....Northeast around 10 mph.

.SATURDAY...

Sky/weather.........Cloudy. Rain showers through the day. Isolated
                    thunderstorms in the morning, Scattered
                    thunderstorms in the afternoon. Thunderstorms may
                    produce heavy rainfall.
CWR.................93 percent.
Chance of lightning.39 percent.
Max temperature.....62-67.
Min humidity........72-78 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds 5 to 10 mph. Gusty and erratic winds
                    expected near thunderstorms.
 Ridgetop...........Northeast around 10 mph.
Mixing height.......2800 ft AGL in the afternoon.
Transport winds.....Northeast around 10 mph.

.FORECAST DAYS 3 THROUGH 7...
.SUNDAY...
Patchy fog. Showers and scattered thunderstorms. Lows in the
lower 50s. Highs in the upper 60s. Northwest winds around 7 mph.
.MONDAY...
Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 70s. Light
winds.
.TUESDAY...
Mostly clear. Lows in the upper 40s. Highs in the upper 70s.
Light winds.
.WEDNESDAY...
Mostly clear. Slight chance of showers. Lows in the upper 40s.
Highs in the upper 70s.
.THURSDAY...
Mostly clear. Lows in the upper 40s. Highs in the upper 70s.

$$
Forecaster...Chambers
Requested by...Trasia
Type of request...WILDFIRE
.TAG 2621871.6/BYZ
.DELDT 09/17/26
.FormatterVersion 2.0.0
.EMAIL rhayner@blm.gov,dsciacca@mt.gov,jludikhuize@sheridancountywy.gov,anna_sammer@firenet.gov,mtbdc@firenet.gov