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

Heat Wave Continues in the Northeastern Quarter of the U.S.; Excessive Rain May Bring Flooding in the North Central U.S.

The heat wave is expected to peak in the eastern Great Lakes and New England today, and the Ohio Valley and Mid-Atlantic Friday into the weekend. Widespread daily record high temperatures are likely. Heavy to excessive rainfall will be associated with thunderstorms forecast to move across parts of the northern Plains and Upper Midwest today into Friday. Read More >

Hazardous Weather Conditions

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Mostly Cloudy

64°F

18°C

Humidity 73%
Wind Speed NE 10 G 16 mph
Barometer 30.20 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Jun 10:55 am MDT
Extended Forecast for

Lead SD

  • Today

    Today: Isolated showers, with thunderstorms also possible after noon. Patchy fog after 4pm. Otherwise, partly sunny, with a high near 65. East wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.

    High: 65 °F

    Isolated
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 9pm and midnight. Patchy fog before 8pm, then patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 54. Southeast wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 15 mph.

    Low: 54 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 65. East wind 3 to 7 mph. Winds could gust as high as 15 mph.

    High: 65 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 55. Southeast wind around 6 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after noon. Sunny, with a high near 75. West wind 5 to 8 mph becoming north in the afternoon. Winds could gust as high as 18 mph.

    High: 75 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. North wind around 6 mph becoming calm in the evening. Winds could gust as high as 16 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Light and variable wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 22 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. Southeast wind around 8 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Isolated showers, with thunderstorms also possible after noon. Patchy fog after 4pm. Otherwise, partly sunny, with a high near 65. East wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 9pm and midnight. Patchy fog before 8pm, then patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 54. Southeast wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 15 mph.
Friday
A 50 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 65. East wind 3 to 7 mph. Winds could gust as high as 15 mph.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 55. Southeast wind around 6 mph becoming light and variable. Chance of precipitation is 70%.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after noon. Sunny, with a high near 75. West wind 5 to 8 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
Mostly clear, with a low around 56. North wind around 6 mph becoming calm in the evening. Winds could gust as high as 16 mph.
Sunday
Sunny, with a high near 83. Light and variable wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly clear, with a low around 65. Southeast wind around 8 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Monday
Sunny, with a high near 87.
Monday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 59.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 80.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 58.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 82.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Lead SD
 44.35°N 103.77°W (Elev. 5322 ft)
Last Update:
9:50 am MDT Jun 20, 2024
Forecast Valid:
11am MDT Jun 20, 2024-6pm MDT Jun 26, 2024
 
Forecast Discussion
 
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Additional Resources

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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