Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Last Update: 1106 PM EDT Tue Aug 18 2026

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Grand Rapids, MI Local Forecast Office

11NM SSW Grand Haven MI

Marine Zone Forecast

Rest Of Tonight
West winds around 15 knots veering northwest after midnight. Mostly cloudy with a chance of thunderstorms and a slight chance of rain showers. Waves 2 to 4 feet.
Wednesday
North winds 5 to 10 knots backing northwest 10 to 15 knots early in the afternoon. Mostly sunny. Waves 1 to 3 feet.
Wednesday Night
North winds 10 to 15 knots veering east 5 to 10 knots after midnight. Mostly clear. Waves around 1 foot.
Thursday
East winds 5 to 10 knots veering west early in the afternoon. Sunny. Waves less than 1 foot.
Thursday Night
West winds 5 to 15 knots backing south in the late evening and overnight. Partly cloudy. Waves 1 foot or less.
Friday
Southwest winds 10 to 20 knots. Partly sunny. Waves 1 to 3 feet.
Saturday
Northwest winds 15 to 25 knots. Mostly sunny. Waves 3 to 5 feet.
Sunday
North winds 15 to 25 knots backing northwest to 30 knots early in the afternoon. Mostly sunny. Waves 3 to 6 feet.



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1106 PM EDT Tue Aug 18 2026
 
 

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