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 >

Hazardous Weather Conditions

Current conditions at

John F Kennedy Memorial Airport (KASX)

Lat: 46.55°NLon: 90.92°WElev: 814ft.

Fair

73°F

23°C

Humidity 79%
Wind Speed SW 9 mph
Barometer 29.83 in (1009.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 9 Aug 10:53 am CDT
Extended Forecast for

Mellen WI

  • Today

    Today: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Breezy, with a southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 63. South wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Southwest wind around 5 mph, with gusts as high as 15 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 81. West wind around 5 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. Southwest wind around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 82. West wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. West wind around 5 mph becoming southwest after midnight.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 82. Southwest wind around 5 mph becoming northwest in the afternoon.

    High: 82 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Breezy, with a southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 63. South wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 58. Southwest wind around 5 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 81. West wind around 5 mph.
Monday Night
Partly cloudy, with a low around 62. Southwest wind around 5 mph.
Tuesday
Sunny, with a high near 82. West wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Partly cloudy, with a low around 58. West wind around 5 mph becoming southwest after midnight.
Wednesday
Sunny, with a high near 82. Southwest wind around 5 mph becoming northwest in the afternoon.
Wednesday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 60. East wind around 5 mph becoming south after midnight.
Thursday
A slight chance of showers. Mostly sunny, with a high near 83. South wind 5 to 10 mph.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 64. South wind around 5 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. South wind 5 to 10 mph, with gusts as high as 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mellen WI
 46.32°N 90.65°W
Last Update:
11:10 am CDT Aug 9, 2025
Forecast Valid:
11am CDT Aug 9, 2025-6pm CDT Aug 15, 2025
 
Forecast Discussion
 
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Additional Resources

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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