Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Last Update: 310 AM CDT Wed Jun 17 2026

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Grand Rapids, MI Local Forecast Office

21NM W Saugatuck MI

Marine Zone Forecast

Today

Southwest winds 10 to 15 kt becoming south 10 to 20 kt late this morning, then becoming southeast to 30 kt this afternoon. Chance of showers this morning, then showers with a chance of thunderstorms this afternoon. Waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft.

Tonight

Southeast winds to 30 kt veering to west. Chance of showers and thunderstorms in the evening, then slight chance of showers overnight. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft.

Thursday

West winds to 30 kt diminishing to 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

Thursday Night

West winds 10 to 20 kt. Waves 2 to 4 ft.

Friday

Northwest winds 10 to 20 kt. Waves 2 to 4 ft.

Friday Night

West winds 10 to 15 kt. Waves 1 to 2 ft.

Saturday

West winds 10 to 20 kt becoming southwest. Waves 1 to 2 ft.

Sunday

East winds 10 to 15 kt becoming northeast 15 to 25 kt. Chance of showers. Waves 1 to 2 ft building to 2 to 4 ft.