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

Heavy Rain and Thunderstorms in the Plains; Snow in the Northern Rockies; Heavy Rain in Guam

A storm system moving over the Rockies today will bring marginal risks for excessive rainfall and severe thunderstorms from parts of New Mexico into western South Dakota. Heavy snow expected from northwestern Wyoming into southern Montana. Ongoing heavy showers and thunderstorms from Invest 96W could result in localized flash flooding, particularly in central or southern Guam early this morning. Read More >

Hazardous Weather Conditions

Current conditions at

Hettinger, Hettinger Municipal Airport (KHEI)

Lat: 46.01°NLon: 102.65°WElev: 2703ft.

Overcast

46°F

8°C

Humidity 96%
Wind Speed SE 14 mph
Barometer 30.12 in (1021.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 15 Oct 10:53 am MDT
Extended Forecast for

Ralph SD

  • Today

    Today: Areas of drizzle and thunderstorms, then drizzle and possibly a thunderstorm after noon. Areas of fog. Otherwise, cloudy, with a high near 49. East wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 49 °F

    T-storms and
    Areas Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before midnight, then showers and possibly a thunderstorm between midnight and 3am, then a chance of showers after 3am. Areas of fog. Low around 44. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Showers and
    Areas Fog

  • Thursday

    Thursday: Showers. High near 56. Northeast wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%.

    High: 56 °F

    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 38. Breezy, with a west wind 17 to 21 mph, with gusts as high as 32 mph.

    Low: 38 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 57. Breezy, with a west wind 21 to 28 mph, with gusts as high as 40 mph.

    High: 57 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 34. Breezy, with a west wind 17 to 22 mph, with gusts as high as 33 mph.

    Low: 34 °F

    Partly Cloudy
    and Breezy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 53. Breezy, with a northwest wind 20 to 28 mph, with gusts as high as 39 mph.

    High: 53 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30. Northwest wind 10 to 16 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Today
Areas of drizzle and thunderstorms, then drizzle and possibly a thunderstorm after noon. Areas of fog. Otherwise, cloudy, with a high near 49. East wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Tonight
Showers and thunderstorms likely before midnight, then showers and possibly a thunderstorm between midnight and 3am, then a chance of showers after 3am. Areas of fog. Low around 44. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Thursday
Showers. High near 56. Northeast wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 38. Breezy, with a west wind 17 to 21 mph, with gusts as high as 32 mph.
Friday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 57. Breezy, with a west wind 21 to 28 mph, with gusts as high as 40 mph.
Friday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 34. Breezy, with a west wind 17 to 22 mph, with gusts as high as 33 mph.
Saturday
Sunny, with a high near 53. Breezy, with a northwest wind 20 to 28 mph, with gusts as high as 39 mph.
Saturday Night
Mostly clear, with a low around 30. Northwest wind 10 to 16 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 57. Breezy.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 32.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 53. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ralph SD
 45.77°N 103.08°W (Elev. 2799 ft)
Last Update:
10:52 am MDT Oct 15, 2025
Forecast Valid:
11am MDT Oct 15, 2025-6pm MDT Oct 21, 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