Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Southern Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over the Northern Mariana Islands. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes through Tuesday. Heavy snow is expected in the Pacific Northwest. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

40°F

4°C

Humidity 83%
Wind Speed Calm
Barometer 29.82 in (1008.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 14 Apr 12:52 am MDT
Extended Forecast for

Rapid Valley SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. West wind around 6 mph becoming calm.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 3pm.  Mostly cloudy, with a high near 64. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 64 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Southwest wind 5 to 8 mph, with gusts as high as 15 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. West wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 22 mph.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers after noon.  Partly sunny, with a high near 76. Breezy, with a southwest wind 10 to 15 mph becoming southwest 16 to 21 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 76 °F

    Partly Sunny
    then Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Rain showers before 3am, then rain and snow showers between 3am and 4am, then snow showers after 4am.  Low around 30. Blustery, with a north wind 21 to 24 mph, with gusts as high as 41 mph.  Chance of precipitation is 80%.

    Low: 30 °F

    Blustery.
    Showers then
    Rain/Snow

  • Friday

    Friday: Snow showers likely, mainly before noon.  Mostly cloudy, with a high near 44. Windy, with a north wind 23 to 30 mph, with gusts as high as 49 mph.

    High: 44 °F

    Snow Showers
    Likely and
    Windy

  • Friday Night

    Friday Night: A slight chance of snow showers before midnight.  Mostly cloudy, with a low around 24. Blustery.

    Low: 24 °F

    Slight Chance
    Snow Showers
    and Blustery
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. West wind around 6 mph becoming calm.
Tuesday
A 30 percent chance of showers, mainly after 3pm. Mostly cloudy, with a high near 64. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Southwest wind 5 to 8 mph, with gusts as high as 15 mph.
Wednesday
Mostly sunny, with a high near 75. West wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 46. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Thursday
A 40 percent chance of showers after noon. Partly sunny, with a high near 76. Breezy, with a southwest wind 10 to 15 mph becoming southwest 16 to 21 mph in the afternoon. Winds could gust as high as 37 mph.
Thursday Night
Rain showers before 3am, then rain and snow showers between 3am and 4am, then snow showers after 4am. Low around 30. Blustery, with a north wind 21 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 80%.
Friday
Snow showers likely, mainly before noon. Mostly cloudy, with a high near 44. Windy, with a north wind 23 to 30 mph, with gusts as high as 49 mph.
Friday Night
A slight chance of snow showers before midnight. Mostly cloudy, with a low around 24. Blustery.
Saturday
A slight chance of snow showers after noon, mixing with rain after 3pm. Mostly sunny, with a high near 49. Breezy.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Rapid Valley SD
 44.06°N 103.15°W (Elev. 3107 ft)
12:32 am MDT Apr 14, 2026
1am MDT Apr 14, 2026-6pm MDT Apr 20, 2026
 
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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