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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Jackson County Airport - Reynolds Field (KJXN)

Lat: 42.26°NLon: 84.46°WElev: 988ft.

Light Rain

60°F

16°C

Humidity 78%
Wind Speed SE 7 G 17 mph
Barometer 29.58 in (1001.5 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 17 Jun 4:56 pm EDT
Extended Forecast for

Grass Lake MI

Flood Watch until June 18, 02:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 18, 02:00am

    NOW until 2:00am Thu

    Flood Watch

  • This Afternoon

    High: 68 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am, then a chance of showers after 2am. Some of the storms could be severe and produce heavy rainfall. Low around 58. Southeast wind 14 to 18 mph becoming west southwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 58 °F

    Severe
    Thunderstorms

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 71. West wind around 16 mph, with gusts as high as 30 mph.

    High: 71 °F

    Chance
    Showers then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. West wind 5 to 10 mph, with gusts as high as 23 mph.

    Low: 52 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 74. West northwest wind 7 to 14 mph, with gusts as high as 26 mph.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 68. South southeast wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 2am, then a chance of showers after 2am. Some of the storms could be severe and produce heavy rainfall. Low around 58. Southeast wind 14 to 18 mph becoming west southwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday
A 30 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 71. West wind around 16 mph, with gusts as high as 30 mph.
Thursday Night
Mostly clear, with a low around 52. West wind 5 to 10 mph, with gusts as high as 23 mph.
Juneteenth
Sunny, with a high near 74. West northwest wind 7 to 14 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 52.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 76.
Sunday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 55.
Monday
A chance of showers. Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
A chance of showers. Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grass Lake MI
 42.25°N 84.2°W (Elev. 997 ft)
Last Update:
5:03 pm EDT Jun 17, 2026
Forecast Valid:
5pm EDT Jun 17, 2026-6pm EDT Jun 24, 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