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

Heavy Rain in the Ohio and Tennessee Valleys; Watching for Tropical Cyclone Development in the Atlantic

Heavy to excessive rainfall may bring areas of flash and urban flooding over portions of the Ohio and Tennessee Valleys. Two tropical waves in the Atlantic are being monitored for tropical cyclone formation within the next few days. One tropical wave will bring periods of heavy rain, thunderstorms, flood risk, and landslides to Puerto Rico and the US Virgin Islands through Friday morning. Read More >

Current conditions at

Bismarck, Bismarck Municipal Airport (KBIS)

Lat: 46.78°NLon: 100.76°WElev: 1677ft.

Fair

81°F

27°C

Humidity 33%
Wind Speed S 6 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 24 Sep 3:52 pm CDT
Extended Forecast for

Napoleon ND

  • Tonight

    Tonight: Clear, with a low around 53. South wind 6 to 11 mph, with gusts as high as 18 mph.

    Low: 53 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Southwest wind around 11 mph becoming northeast in the afternoon.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 49. East wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 79. Breezy, with a southeast wind 16 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph.

    High: 79 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 48. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 73. Northwest wind 5 to 14 mph becoming south in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 52. South wind around 10 mph.

    Low: 52 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 80. Breezy, with a south wind 11 to 20 mph, with gusts as high as 28 mph.

    High: 80 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. Southeast wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 53. South wind 6 to 11 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 76. Southwest wind around 11 mph becoming northeast in the afternoon.
Thursday Night
Clear, with a low around 49. East wind 8 to 13 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 79. Breezy, with a southeast wind 16 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph.
Friday Night
Mostly clear, with a low around 48. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 73. Northwest wind 5 to 14 mph becoming south in the morning. Winds could gust as high as 21 mph.
Saturday Night
Clear, with a low around 52. South wind around 10 mph.
Sunday
Sunny, with a high near 80. Breezy, with a south wind 11 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 61. Southeast wind 14 to 16 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a southeast wind 16 to 20 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 62. Southeast wind 15 to 17 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 77. Breezy, with a south wind 17 to 23 mph, with gusts as high as 32 mph.
Tuesday Night
Partly cloudy, with a low around 60. South wind around 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 76. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Napoleon ND
 46.5°N 99.76°W
Last Update:
4:49 pm CDT Sep 24, 2025
Forecast Valid:
5pm CDT Sep 24, 2025-6pm CDT Oct 1, 2025
 
Forecast Discussion
 
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