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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Current conditions at

ROCKY BOY (RCBM8)

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

NA

32°F

0°C

Humidity 96%
Wind Speed SE 2 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 16 Nov 02:18 AM MST
Extended Forecast for

Big Sandy MT

  • Overnight

    Overnight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Patchy Dense
    Fog

  • Sunday

    Sunday: Patchy dense fog before 11am. Otherwise, partly sunny, with a high near 53. East northeast wind 5 to 8 mph.

    High: 53 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 33. North northeast wind 3 to 8 mph.

    Low: 33 °F

    Patchy Fog

  • Monday

    Monday: A 20 percent chance of rain after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 56. Light and variable wind.

    High: 56 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Monday Night

    Monday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 31. Light and variable wind becoming north around 6 mph in the evening.

    Low: 31 °F

    Chance Rain

  • Tuesday

    Tuesday: A slight chance of rain before 8am, then a slight chance of rain and snow between 8am and 11am, then a slight chance of rain after 11am. Mostly cloudy, with a high near 47. West northwest wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 47 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 28. Light and variable wind. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of snow before 9am, then a chance of rain and snow between 9am and 10am, then a chance of rain after 10am. Partly sunny, with a high near 45. Northwest wind around 6 mph.

    High: 45 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 30. Calm wind.
Sunday
Patchy dense fog before 11am. Otherwise, partly sunny, with a high near 53. East northeast wind 5 to 8 mph.
Sunday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 33. North northeast wind 3 to 8 mph.
Monday
A 20 percent chance of rain after 11am. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 56. Light and variable wind.
Monday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31. Light and variable wind becoming north around 6 mph in the evening.
Tuesday
A slight chance of rain before 8am, then a slight chance of rain and snow between 8am and 11am, then a slight chance of rain after 11am. Mostly cloudy, with a high near 47. West northwest wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 28. Light and variable wind. Chance of precipitation is 20%.
Wednesday
A chance of snow before 9am, then a chance of rain and snow between 9am and 10am, then a chance of rain after 10am. Partly sunny, with a high near 45. Northwest wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 46.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 51.
Friday Night
Mostly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 53.
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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:
2:19 am MST Nov 16, 2025
Forecast Valid:
3am MST Nov 16, 2025-6pm MST Nov 22, 2025
 
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