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

Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Current conditions at

Bismarck, Bismarck Municipal Airport (KBIS)

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

Fair

74°F

23°C

Humidity 52%
Wind Speed NW 9 mph
Barometer 30.12 in (1019.6 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 15 Aug 7:52 pm CDT
Extended Forecast for

Napoleon ND

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Northwest wind 5 to 13 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 77. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 55. Light and variable wind becoming south 5 to 9 mph after midnight. Chance of precipitation is 60%.

    Low: 55 °F

    Partly Cloudy
    then Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 80. South wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 55. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Low: 55 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Southeast wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 60%.

    High: 74 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 50. North wind 5 to 8 mph becoming east after midnight.

    Low: 50 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers after 1pm. Mostly sunny, with a high near 76. Southeast wind 6 to 9 mph becoming southwest in the afternoon.

    High: 76 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. South wind 6 to 9 mph.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 51. Northwest wind 5 to 13 mph.
Sunday
Sunny, with a high near 77. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 55. Light and variable wind becoming south 5 to 9 mph after midnight. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly sunny, with a high near 80. South wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 55. Northwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Southeast wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
Tuesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 50. North wind 5 to 8 mph becoming east after midnight.
Wednesday
A slight chance of showers after 1pm. Mostly sunny, with a high near 76. Southeast wind 6 to 9 mph becoming southwest in the afternoon.
Wednesday Night
Partly cloudy, with a low around 54. South wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 80. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Partly cloudy, with a low around 56. West wind 6 to 8 mph becoming south in the evening.
Friday
Mostly sunny, with a high near 82. West wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Mostly clear, with a low around 56. North wind 5 to 9 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Napoleon ND
 46.5°N 99.76°W
Last Update:
7:36 pm CDT Aug 15, 2026
Forecast Valid:
8pm CDT Aug 15, 2026-6pm CDT Aug 22, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation