Significant rainfall fell across all of Lower Michigan on May 17 and 18 with many locations in Southwest Lower Michigan reporting over 3 inches of rain. This was the culmination of an already wet week that had experienced three separate episodes of heavy rain. As a result, soil was already saturated and this additional rain immediately became runoff instead of soaking into the ground.  There were many reports of road closures due to water over roads and some significant damage to homes which were flooded particularly across western portions of Ottawa and Muskegon counties.  The flooding caused millions of dollars worth of damage.
The Muskegon and Grand River Basins saw the brunt of the heaviest rain and were therefore impacted the most. This was particularly evident at Evart, near the uppermost reaches of the Muskegon River. Slightly farther north, the White River also saw sharp rises that resulted in minor flooding. Lakeshore flooding also occurred in this area, resulting a temporary closure of the causeway (Dowling Street) that connects Whitehall and Montague. 372 homes were impacted by flooding in Ottawa county alone.

Flood in NEWAYGO, MICHIGAN
From 18-MAY-20 09:33:00 to 18-MAY-20 23:00:00 (EST-5)
Location: SITKA
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A couple of roads were closed in Bridgeton due to water over roads.

Flood in MONTCALM, MICHIGAN
From 18-MAY-20 10:22:00 to 18-MAY-20 23:00:00 (EST-5)
Location: LANGSTON
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple lakes flooded lakeside homes and multiple roads were flooded.

Flood in MECOSTA, MICHIGAN
From 18-MAY-20 18:29:00 to 18-MAY-20 23:00:00 (EST-5)
Location: BARRYTON
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Chippewa Vista subdivision had some flooding due to flooding on the Chippewa River near Barryton.

Flood in ISABELLA, MICHIGAN
From 18-MAY-20 10:40:00 to 18-MAY-20 23:00:00 (EST-5)
Location: BEAL CITY
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few buildings were flooded in Mt. Pleasant.

Flood in OTTAWA, MICHIGAN
From 18-MAY-20 09:35:00 to 18-MAY-20 23:00:00 (EST-5)
Location: GRAND HAVEN ARPT
Flood cause: Heavy Rain
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Ottawa county emergency management reported that 372 homes were affected by flooding of the Grand River.  Ten homes incurred major damage and 3 sustained minor damage.  Several building complexes incurred significant flood damage, particularly in Grand Haven, Spring Lake and Ferrysburg. Several roads were also closed due to flooding.

Flood in GRATIOT, MICHIGAN
From 18-MAY-20 07:53:00 to 18-MAY-20 23:00:00 (EST-5)
Location: ITHACA
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Over a dozen roads were closed countywide due to water over roads.  The Pine River went over flood stage and impacted roads in Alma.

Flood in CLINTON, MICHIGAN
From 18-MAY-20 09:45:00 to 18-MAY-20 23:00:00 (EST-5)
Location: WESTPHALIA
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several roads were closed due to water over roads.

Flood in IONIA, MICHIGAN
From 18-MAY-20 13:48:00 to 18-MAY-20 23:00:00 (EST-5)
Location: MUIR
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were closed due to flooding in and near Ionia.

Flood in EATON, MICHIGAN
From 18-MAY-20 15:41:00 to 18-MAY-20 23:00:00 (EST-5)
Location: GRESHAM
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

There were numerous road closures due to flooding.

Flood in MUSKEGON, MICHIGAN
From 18-MAY-20 10:44:00 to 18-MAY-20 23:00:00 (EST-5)
Location: MONTAGUE ARPT
Flood cause: Heavy Rain
Property damage: 6.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Many roads across Muskegon county were flooded and there were also numerous reports of flooded basements.  67 homes sustained major damage and 3 homes incurred minor damage.

Flood in KALAMAZOO, MICHIGAN
From 18-MAY-20 13:35:00 to 18-MAY-20 23:00:00 (EST-5)
Location: VICKSBURG
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Several roads were closed due to flooding.

Flood in KENT, MICHIGAN
From 18-MAY-20 09:40:00 to 18-MAY-20 23:00:00 (EST-5)
Location: ALPINE
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding of the Grand River in the Comstock Park area affected 108 homes.  One of the homes incurred major damage and the flooding caused two hundred thousand dollars worth of damage.