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The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will be discontinued on May 6, 2026.

Hazardous Weather Conditions

Winter Weather Advisory in effect from April 22, 06:00 PM MDT until April 24, 12:00 PM MDT

Current conditions at

Sieben I-15 MP 216 (MTSBN)

Lat: 46.88748267° N Lon: 112.1111196° W Elev: 4199.0 ft.

65°F

18°C

Humidity	27%
Wind Speed	W 9 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Last update	22 Apr 10:15 AM MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Detailed forecast for

Upper Blackfoot and MacDonald Pass

Rest Of Today

Breezy, cooler. Mostly sunny late in the morning. Slight chance of rain late in the morning, then rain showers likely with possible snow showers and thunderstorms in the afternoon. Snow accumulation up to 1 inch. Highs 50 to 58. Southwest winds 10 to 25 mph with gusts to around 45 mph. Chance of precipitation 90 percent.

Tonight

Breezy, colder. Snow with rain likely in the evening, then snow and rain after midnight. Patchy blowing snow through the night. Snow accumulation up to 6 inches. Snow level 5200 feet. Lows in the upper 20s. West winds 15 to 25 mph with gusts to around 45 mph decreasing to 10 to 15 mph with gusts to around 35 mph after midnight. Chance of precipitation near 100 percent.

Thursday

Colder, snow. Snow accumulation of 2 to 7 inches. Near steady temperature in the upper 20s. Northwest winds 5 to 15 mph with gusts to around 30 mph. Chance of snow near 100 percent.

Thursday Night

Snow in the evening, then snow likely after midnight. Moderate snow accumulations. Lows around 20. North winds up to 15 mph. Gusts up to 30 mph in the evening. Chance of snow 80 percent.

Friday

Snow in the morning, then snow likely in the afternoon. Light snow accumulations. Highs 26 to 34. North winds 5 to 15 mph with gusts to around 30 mph. Chance of snow 90 percent.

Friday Night

Mostly cloudy. A 40 percent chance of snow in the evening. Lows around 17.

Saturday

Partly sunny with a 50 percent chance of snow. Highs 28 to 36.

Saturday Night

Mostly cloudy with a 20 percent chance of snow. Lows around 19.

Sunday

Partly sunny with a 50 percent chance of snow. Highs 31 to 39.

Sunday Night

Mostly cloudy with a 20 percent chance of snow. Lows around 20.

Monday

Not as cool. Partly sunny. Slight chance of snow in the morning, then chance of snow in the afternoon. Highs 40 to 48. Chance of snow 50 percent.

Monday Night

Partly cloudy. A 20 percent chance of snow in the evening. Lows in the mid 20s.

Tuesday

Mostly sunny. Slight chance of snow in the morning, then chance of rain and snow in the afternoon. Highs 45 to 53. Chance of precipitation 50 percent.