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

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Mostly Cloudy and Breezy

76°F

24°C

Humidity 15%
Wind Speed SW 21 G 36 mph
Barometer 29.67 in (1002.6 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 13 Apr 12:52 pm MDT
Extended Forecast for

Rapid City SD

Red Flag Warning April 13, 01:00pm until April 13, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning April 13, 01:00pm until April 13, 09:00pm

    NOW until 9:00pm Mon

    Red Flag Warning

  • This Afternoon

    High: 73 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Northwest wind 12 to 17 mph becoming light west  after midnight. Winds could gust as high as 33 mph.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm.  Partly sunny, with a high near 66. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 66 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. Southwest wind 3 to 6 mph. Winds could gust as high as 17 mph.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73. Southwest wind 5 to 9 mph becoming southeast in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers after noon.  Mostly sunny, with a high near 76. Southwest wind 9 to 17 mph, with gusts as high as 34 mph.

    High: 76 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers likely before 3am, then rain and snow showers likely.  Mostly cloudy, with a low around 31. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 39 mph.

    Low: 31 °F

    Blustery.
    Showers
    Likely then
    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 73. Breezy, with a southwest wind 17 to 21 mph, with gusts as high as 37 mph.
Tonight
Partly cloudy, with a low around 40. Northwest wind 12 to 17 mph becoming light west after midnight. Winds could gust as high as 33 mph.
Tuesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 66. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 39. Southwest wind 3 to 6 mph. Winds could gust as high as 17 mph.
Wednesday
Sunny, with a high near 73. Southwest wind 5 to 9 mph becoming southeast in the morning. Winds could gust as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 50. Southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 76. Southwest wind 9 to 17 mph, with gusts as high as 34 mph.
Thursday Night
Rain showers likely before 3am, then rain and snow showers likely. Mostly cloudy, with a low around 31. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 39 mph.
Friday
Snow showers likely. Mostly cloudy, with a high near 44. Breezy.
Friday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 26. Blustery.
Saturday
A slight chance of snow showers. Mostly sunny, with a high near 53. Breezy.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Sunny, with a high near 68.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Rapid City SD
 44.08°N 103.24°W (Elev. 3291 ft)
12:32 pm MDT Apr 13, 2026
1pm MDT Apr 13, 2026-6pm MDT Apr 19, 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