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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 >

Hazardous Weather Conditions

Current conditions at

ROCKY BOY (RCBM8)

Lat: 48.25529°NLon: 109.78592°WElev: 3789.0ft.

NA

42°F

6°C

Humidity 89%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 10 Oct 08:18 AM MDT
Extended Forecast for

Big Sandy MT

Winter Weather Advisory October 10, 06:00pm until October 12, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Rain, mainly after noon. Temperature falling to around 36 by 5pm. North wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F⇓

    Chance Rain
    then Rain

  • Tonight

    Tonight: Rain before 9pm, then rain and snow. Low around 30. North wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain/Snow

  • Sunday

    Sunday: Rain and snow. High near 38. North northeast wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow

  • Sunday Night

    Sunday Night: Snow, possibly mixed with rain. Low around 28. North northeast wind 8 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow

  • Columbus Day

    Columbus Day: Snow likely, possibly mixed with rain before 3pm, then a slight chance of rain. Cloudy, with a high near 44. North northeast wind 5 to 8 mph becoming calm in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow
    Likely then
    Slight Chance
    Rain/Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24. Light south wind.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51. South wind 3 to 5 mph.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

Today
Rain, mainly after noon. Temperature falling to around 36 by 5pm. North wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain before 9pm, then rain and snow. Low around 30. North wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Sunday
Rain and snow. High near 38. North northeast wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow, possibly mixed with rain. Low around 28. North northeast wind 8 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Columbus Day
Snow likely, possibly mixed with rain before 3pm, then a slight chance of rain. Cloudy, with a high near 44. North northeast wind 5 to 8 mph becoming calm in the afternoon. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a low around 24. Light south wind.
Tuesday
Mostly sunny, with a high near 51. South wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 26. Calm wind.
Wednesday
Sunny, with a high near 58.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 31.
Thursday
A slight chance of rain. Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Big Sandy MT
 48.18°N 110.11°W (Elev. 2759 ft)
Last Update:
8:02 am MDT Oct 10, 2026
Forecast Valid:
8am MDT Oct 10, 2026-6pm MDT Oct 16, 2026
 
Forecast Discussion
 
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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