National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Comertown Turn-Off MT-5 MP 13.4 (MTCOM)

Lat: 48.81°NLon: 104.2529°WElev: 2359.0ft.

unknown precip

39°F

4°C

Humidity 83%
Wind Speed NNE 13 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill31°F (-1°C)
Last update 11 Oct 02:00 AM MDT
Extended Forecast for

Westby MT

  • Overnight

    Overnight: A 50 percent chance of rain. Cloudy, with a low around 35. North wind around 18 mph, with gusts as high as 28 mph.

    Low: 35 °F

    Chance Rain

  • Sunday

    Sunday: Rain, mainly after 11am. Patchy fog after noon. High near 44. Northeast wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%.

    High: 44 °F

    Rain Likely
    then Rain and
    Patchy Fog

  • Sunday Night

    Sunday Night: Rain before 4am, then rain, possibly mixed with snow. Patchy fog. Low around 30. Northeast wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain and
    Patchy Fog
    then
    Rain/Snow and
    Patchy Fog

  • Columbus Day

    Columbus Day: Rain and snow, becoming all rain after 10am. Patchy fog before 7am. High near 41. North northeast wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Rain/Snow and
    Patchy Fog
    then Rain

  • Monday Night

    Monday Night: A slight chance of rain and snow before 9pm, then a slight chance of snow between 9pm and midnight. Cloudy, with a low around 30. North wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 30 °F

    Slight Chance
    Rain/Snow
    then Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 50. Light west southwest wind becoming west 5 to 10 mph in the morning.

    High: 50 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29. West wind 3 to 6 mph.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 56. South wind 3 to 8 mph.

    High: 56 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34. South wind 7 to 10 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of rain. Cloudy, with a low around 35. North wind around 18 mph, with gusts as high as 28 mph.
Sunday
Rain, mainly after 11am. Patchy fog after noon. High near 44. Northeast wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%.
Sunday Night
Rain before 4am, then rain, possibly mixed with snow. Patchy fog. Low around 30. Northeast wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Columbus Day
Rain and snow, becoming all rain after 10am. Patchy fog before 7am. High near 41. North northeast wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Monday Night
A slight chance of rain and snow before 9pm, then a slight chance of snow between 9pm and midnight. Cloudy, with a low around 30. North wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 50. Light west southwest wind becoming west 5 to 10 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 29. West wind 3 to 6 mph.
Wednesday
Sunny, with a high near 56. South wind 3 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 34. South wind 7 to 10 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Thursday
Mostly sunny, with a high near 55. Breezy, with a northwest wind 13 to 18 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 41 mph.
Thursday Night
Mostly cloudy, with a low around 29. Blustery, with a north northwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 34 mph.
Friday
Mostly sunny, with a high near 51.
Friday Night
Mostly clear, with a low around 31.
Saturday
Sunny, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.87°N 104.05°W (Elev. 1991 ft)
Last Update:
12:35 am MDT Oct 11, 2026
Forecast Valid:
2am MDT Oct 11, 2026-6pm MDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation