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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Fair

57°F

14°C

Humidity 77%
Wind Speed Vrbl 5 G 12 mph
Barometer 30.06 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 8 Aug 9:15 pm MDT
Extended Forecast for

Nisland SD

  • Tonight

    Tonight: Mostly clear, with a low around 54. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80. Breezy, with a west wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 80 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 56 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Northwest wind 5 to 10 mph becoming southwest in the evening. Winds could gust as high as 15 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. North wind 5 to 10 mph becoming south in the evening. Winds could gust as high as 15 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 54. Southwest wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 80. Breezy, with a west wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Saturday Night
Partly cloudy, with a low around 56. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 81. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 58. Northwest wind 5 to 10 mph becoming southwest in the evening. Winds could gust as high as 15 mph.
Monday
Mostly sunny, with a high near 84. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 59. North wind 5 to 10 mph becoming south in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 88. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 92.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nisland SD
 44.66°N 103.56°W (Elev. 2897 ft)
Last Update:
6:49 pm MDT Aug 8, 2025
Forecast Valid:
9pm MDT Aug 8, 2025-6pm MDT Aug 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation