Thunderstorms developed during the morning hours of the 15th, producing several reports of large hail and high winds. It was also a record rainfall event for the Grand Rapids area, and 4 to 5 inches of rain fell in less than 6 hours across much of southwestern and south central lower Michigan. Three quarters inch hail was reported at Blue Lake Township (Muskegon county) by area law enforcement at 1:07 a.m. EDT. One inch hail was reported by spotters at Duck Lake (Muskegon county) at 1:27 a.m, and in Parchment (Kalamazoo county) at 1:34 a.m. At 1:40 a.m., a 58 mph wind gust was reported by spotters, who also reported that two to three inch tree limbs were blown down at the intersection of 120th street and Crocker road.  4 to 5 inches of rain was reported in a very short period of time at Silver Lake in Oceana county at 1:40 a.m., which produced localized flooding. Tree damage resulting from gusty winds was reported by local media in Muskegon (Muskegon county) at 2:00 a.m.  1.5 inch hail was reported by local media in Climax (Kalamazoo county) at 2:12 a.m.  At 3 a.m., three quarters inch hail was reported by law enforcement at Blue Lake township (Muskegon county). A tree was downed at the intersection of 68th and Leonard streets, reported by area law enforcement in Marne (Ottawa county) at 3:53 a.m.One inch hail was reported by local media at Blue Lake township (Muskegon county) at 4:12 a.m.  Small tree limbs were downed in Marne (Ottawa county) at 4:12 a.m. One inch hail was reported by spotters in Whitehall (Muskegon county) at 4:30 a.m.  Trees were blown down onto 12th street in Kalamazoo county between 8:04 and 8:19 a.m, as reported by area law enforcement. Flash flooding became the primary weather problem. Flash flooding occurred across much of Kent, Oceana and Muskegon counties, where many primary and secondary roads as well as basements of homes were flooded. In Kentwood (Kent county), a car became trapped in rising water under a bridge at the intersection of 36th street and Patterson road. Grand Rapids (Kent county) set a 24 hour record rainfall for the date, where 4.15 inches fell. 1.75 inches of rain in Lansing (Ingham county) was also a new 24 hour record rainfall for the date.  Up to 8 inches of rain fell in Oceana county, and up to 6 inches of rain fell in Muskegon county. Additional flash flooding and flooding took place across Mason, Newaygo, Ottawa, Barry, Calhoun, Ingham, Osceola, Clinton, Gratiot, Montcalm, Mecosta, Isabella, Clare and Eaton counties. There were numerous reports received of flooded roads, basements, and flooding of small creeks and streams. Fortunately, however, the flash flooding and flooding did not cause any fatalities.

Flash Flood in MUSKEGON, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in MASON, MICHIGAN
From 15-MAY-01 00:00:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MASON, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in MASON, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MASON, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in NEWAYGO, MICHIGAN
From 15-MAY-01 02:00:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in NEWAYGO, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in NEWAYGO, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in OTTAWA, MICHIGAN
From 15-MAY-01 02:00:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in OTTAWA, MICHIGAN
From 15-MAY-01 08:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in BARRY, MICHIGAN
From 15-MAY-01 04:15:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in BARRY, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in BARRY, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in BARRY, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in CALHOUN, MICHIGAN
From 15-MAY-01 04:15:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in CALHOUN, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Hail in KALAMAZOO, MICHIGAN
From 15-MAY-01 00:34:00 to 15-MAY-01 00:34:00 (EST)
Location: PARCHMENT
Magnitude: 1.00 
Property damage: 25K
Crop damage: 25K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in MUSKEGON, MICHIGAN
From 15-MAY-01 00:40:00 to 15-MAY-01 00:40:00 (EST)
Location: COUNTYWIDE
Magnitude: 51 M
Property damage: 10K
Reported by: TRAINED SPOTTER

Flash Flood in OCEANA, MICHIGAN
From 15-MAY-01 00:40:00 to 15-MAY-01 08:00:00 (EST)
Location: COUNTYWIDE
Property damage: 500K
Crop damage: 200K
Reported by: NWS STORM SURVEY

Thunderstorm Wind in MUSKEGON, MICHIGAN
From 15-MAY-01 01:00:00 to 15-MAY-01 01:00:00 (EST)
Location: MUSKEGON
Magnitude: 53 E
Property damage: 25K
Reported by: BROADCAST MEDIA

Hail in KALAMAZOO, MICHIGAN
From 15-MAY-01 01:12:00 to 15-MAY-01 01:12:00 (EST)
Location: CLIMAX
Magnitude: 1.50 
Property damage: 25K
Crop damage: 25K
Reported by: BROADCAST MEDIA

Flash Flood in MUSKEGON, MICHIGAN
From 15-MAY-01 01:45:00 to 15-MAY-01 08:00:00 (EST)
Location: MUSKEGON
Property damage: 500K
Crop damage: 200K
Reported by: TRAINED SPOTTER

Hail in MUSKEGON, MICHIGAN
From 15-MAY-01 02:00:00 to 15-MAY-01 02:00:00 (EST)
Location: COUNTYWIDE
Magnitude: 0.75 
Property damage: 10K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in OTTAWA, MICHIGAN
From 15-MAY-01 02:53:00 to 15-MAY-01 02:53:00 (EST)
Location: MARNE
Magnitude: 53 E
Property damage: 10K
Reported by: LAW ENFORCEMENT

Hail in MUSKEGON, MICHIGAN
From 15-MAY-01 03:12:00 to 15-MAY-01 03:12:00 (EST)
Location: COUNTYWIDE
Magnitude: 1.00 
Property damage: 25K
Crop damage: 25K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in OTTAWA, MICHIGAN
From 15-MAY-01 03:12:00 to 15-MAY-01 03:12:00 (EST)
Location: MARNE
Magnitude: 53 E
Property damage: 25K
Reported by: BROADCAST MEDIA

Hail in MUSKEGON, MICHIGAN
From 15-MAY-01 03:30:00 to 15-MAY-01 03:30:00 (EST)
Location: WHITEHALL
Magnitude: 1.00 
Property damage: 25K
Crop damage: 25K
Reported by: TRAINED SPOTTER

Flash Flood in KENT, MICHIGAN
From 15-MAY-01 02:00:00 to 15-MAY-01 08:00:00 (EST)
Location: KENTWOOD
Property damage: 500K
Crop damage: 200K
Reported by: BROADCAST MEDIA

Flash Flood in OCEANA, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in OCEANA, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in MUSKEGON, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in NEWAYGO, MICHIGAN
From 15-MAY-01 08:00:00 to 15-MAY-01 15:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in INGHAM, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in INGHAM, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in INGHAM, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in OSCEOLA, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in OSCEOLA, MICHIGAN
From 16-MAY-01 00:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in OSCEOLA, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in CLINTON, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Hail in MUSKEGON, MICHIGAN
From 15-MAY-01 00:07:00 to 15-MAY-01 00:07:00 (EST)
Location: COUNTYWIDE
Magnitude: 0.75 
Property damage: 10K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Hail in MUSKEGON, MICHIGAN
From 15-MAY-01 00:27:00 to 15-MAY-01 00:27:00 (EST)
Location: COUNTYWIDE
Magnitude: 1.00 
Property damage: 25K
Crop damage: 25K
Reported by: TRAINED SPOTTER

Flash Flood in MECOSTA, MICHIGAN
From 15-MAY-01 23:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MECOSTA, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 16:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in ISABELLA, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in ISABELLA, MICHIGAN
From 15-MAY-01 23:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in ISABELLA, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in CLARE, MICHIGAN
From 15-MAY-01 16:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 100K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MUSKEGON, MICHIGAN
From 16-MAY-01 01:00:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in EATON, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Thunderstorm Wind in KALAMAZOO, MICHIGAN
From 16-MAY-01 07:04:00 to 16-MAY-01 07:19:00 (EST)
Location: KALAMAZOO
Magnitude: 53 E
Property damage: 10K
Reported by: LAW ENFORCEMENT

Flash Flood in CLINTON, MICHIGAN
From 15-MAY-01 23:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in CLINTON, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in GRATIOT, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in GRATIOT, MICHIGAN
From 15-MAY-01 23:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in GRATIOT, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in MONTCALM, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MONTCALM, MICHIGAN
From 15-MAY-01 23:45:00 to 16-MAY-01 03:00:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in MONTCALM, MICHIGAN
From 16-MAY-01 03:00:00 to 17-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY

Flash Flood in MECOSTA, MICHIGAN
From 15-MAY-01 16:45:00 to 15-MAY-01 19:30:00 (EST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 50K
Reported by: NWS STORM SURVEY

Flash Flood in CLARE, MICHIGAN
From 16-MAY-01 03:00:00 to 16-MAY-01 09:00:00 (EST)
Location: COUNTYWIDE
Property damage: 25K
Crop damage: 25K
Reported by: NWS STORM SURVEY