Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Last Update: 635 PM CDT Mon May 18 2026

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Grand Rapids, MI Local Forecast Office

21NM W Saugatuck MI

Marine Zone Forecast

Tonight

South winds 10 to 20 kt increasing to 30 kt. Patchy fog. Slight chance of showers this evening, then chance of showers and thunderstorms overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.

Tuesday

South winds to 30 kt becoming west 15 to 25 kt. Patchy fog in the morning. Slight chance of showers and thunderstorms in the morning, then chance of showers and slight chance of thunderstorms in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.

Tuesday Night

Northwest winds 10 to 20 kt becoming north. Waves 3 to 5 ft.

Wednesday

North winds 10 to 20 kt increasing to 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft.

Wednesday Night

Northeast winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft.

Thursday

East winds 10 to 20 kt becoming northeast. Waves 2 to 4 ft.

Thursday Night

Northeast winds 10 to 20 kt becoming east. Waves 2 to 4 ft.

Friday

East winds 10 to 20 kt becoming northeast. Chance of showers. Waves 2 to 4 ft.