Moke Impacts Hawaii; Severe Thunderstorms and Heavy Rainfall from the Great Basin to the Plains

Heavy rain from Tropical Storm Moke will begin to impact the Big Island today, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Repeated storms and heavy rainfall may cause flash flooding from the Plains into the Lower MS Valley. Dangerous heat persists across the South. Read More >

Hazardous Weather Conditions

Small Craft Advisory until August 23, 10:00 PM CDT

Last Update: 336 PM EDT Sun Aug 23 2026

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Grand Rapids, MI Local Forecast Office

4NM W Muskegon MI

Marine Zone Forecast

Through Early Evening

Northwest winds to 30 knots. Mostly sunny. Waves 5 to 7 feet.

Tonight

North winds 15 to 25 knots decreasing to 10 to 15 knots in the late evening and overnight. Mostly clear. Waves 3 to 5 feet subsiding to 2 to 4 feet in the late evening and overnight.

Monday

Northwest winds 10 to 20 knots. Sunny. Waves 2 to 4 feet.

Monday Night

Northwest winds 10 to 20 knots veering north 5 to 10 knots in the late evening and early morning, then veering northeast after midnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late evening and overnight.

Tuesday

East winds 5 to 10 knots veering southwest 10 to 15 knots in the late morning and afternoon. Sunny. Waves around 1 foot.

Tuesday Night

South winds 15 to 25 knots. Partly cloudy. Waves 1 to 3 feet building to 3 to 5 feet after midnight.

Wednesday

South winds 20 to 25 knots. Partly sunny with a chance of showers and thunderstorms. Waves 4 to 6 feet.

Thursday

Northwest winds 15 to 20 knots. Sunny. Waves 3 to 5 feet.

Friday

North winds 10 to 15 knots backing northwest early in the afternoon. Sunny. Waves around 1 foot.