Dangerous Heat and Heavy Rainfall into the Weekend
Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >
| NWS Forecast for: Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake (LMZ878) Issued by: National Weather Service Grand Rapids, MI Last Update: 907 PM CDT Sat Sep 19 2026 | |
Rest Of Tonight: East winds 10 to 15 kt becoming northeast 10 to 20 kt. Chance of showers and thunderstorms through early evening, then showers with a chance of thunderstorms overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft. Sunday: Northeast winds 10 to 20 kt increasing to 30 kt. Chance of showers and slight chance of thunderstorms in the morning, then chance of showers in the afternoon. Waves 3 to 5 ft building to 7 to 10 ft occasionally to 13 ft. Sunday Night: Northeast winds to 30 kt becoming east. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft. Monday: East winds to 30 kt becoming northeast. Waves 6 to 9 ft occasionally to 12 ft. Monday Night: East winds to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. Tuesday: East winds to 30 kt becoming northeast. Waves 7 to 10 ft occasionally to 13 ft. Tuesday Night: Northeast winds to 30 kt becoming east 15 to 25 kt. Waves 5 to 8 ft occasionally to 10 ft. Wednesday: Northeast winds 15 to 25 kt. Waves 4 to 7 ft occasionally to 9 ft. Thursday: Northeast winds 10 to 20 kt diminishing to 10 to 15 kt. Waves 3 to 5 ft. | |
| Zone Forecast: Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake (LMZ878) | |
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