Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast
Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >
| NWS Forecast for: St Joseph to South Haven MI (LMZ844) Issued by: National Weather Service Grand Rapids, MI Last Update: 116 AM EDT Tue Aug 18 2026 |  |
| Rest Of Tonight: Southwest winds 10 to 15 knots. Mostly clear. Waves around 1 foot. Tuesday: Southwest winds around 15 knots. Mostly sunny. Waves 1 to 3 feet. Tuesday Night: Southwest winds 15 to 20 knots veering northwest after midnight. Rain showers likely and a chance of thunderstorms. Waves 1 to 3 feet. Wednesday: North winds 10 to 15 knots. Mostly sunny. Waves 1 to 3 feet. Wednesday Night: North winds 5 to 15 knots veering east around 5 knots after midnight. Mostly clear. Waves around 1 foot. Thursday: Northeast winds around 5 knots backing north early in the afternoon. Sunny. Waves 1 foot or less. Friday: Southwest winds around 10 knots. Mostly sunny. Waves 1 foot or less. Saturday: West winds 15 to 20 knots veering northwest early in the afternoon. Mostly sunny with a chance of rain showers. Waves 2 to 4 feet. | |
| Zone Forecast: St Joseph to South Haven MI (LMZ844) | |
Visit your local NWS office at: https://www.weather.gov/grr/ |