Thunderstorm Wind, Gratiot
- When
- June 13, 2:10 PM EST
- Where
- Gratiot County, Sumner
- Property damage
- $10,000
- Reported by
- NWS STORM SURVEY
- Coordinates
- 43.320, -84.820
Downed trees and limbs were reported by law enforcement in Gratiot County.
Damaging Winds in Michigan, June 13, 1999
A wave of low pressure developed and moved up along a frontal boundary that was draped across southern lower Michigan. The atmosphere was already moderately unstable in southern Michigan, so the wave of low pressure triggered the development of thunderstorms during the late evening hours.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $50,000
- Crop damage
- None recorded
- Events
- 3
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS GRR wrote it up.
A wave of low pressure developed and moved up along a frontal boundary that was draped across southern lower Michigan. The atmosphere was already moderately unstable in southern Michigan, so the wave of low pressure triggered the development of thunderstorms during the late evening hours. A thunderstorm with a bow echo developed in Allegan county, and wind gusts associated with it blew the roof off a business in Hamilton. As all of the activity moved northeast, thunderstorm wind gusts and a possible small tornado uprooted several trees in Rockford, in Kent County.
The radar
The national radar mosaic for the moment the first event began.
Event by event
3 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, Allegan
- When
- June 13, 9:30 PM EST
- Where
- Allegan County, Hamilton
- Property damage
- $20,000
- Reported by
- NWS STORM SURVEY
- Coordinates
- 42.680, -86.000
A roof was blown off a business in Hamilton by thunderstorm wind gusts.
Thunderstorm Wind, Kent
- When
- June 13, 11:00 PM EST
- Where
- Kent County, Rockford
- Property damage
- $20,000
- Reported by
- NWS STORM SURVEY
- Coordinates
- 43.120, -85.570
Several trees were uprooted by gusty thunderstorm winds and a possible small tornado in Rockford.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Rip Current in Florida, June 13, 1999
- Flooding in Wisconsin, June 13, 1999
- Tornado in North Dakota, June 13, 1999
- Flash Flood and Damaging Wind in New Mexico, June 13 to 17, 1999
- Flash Flood and Flood in Kansas, June 13 to 27, 1999
- Damaging Wind in Missouri, June 13, 1999
- Hail and Damaging Winds in Ohio, June 13, 1999
- Hail and Damaging Winds in Ohio, June 13, 1999
- Tornado in North Dakota, June 13, 1999
- Damaging Wind in Ohio, June 13, 1999
- Damaging Winds in Michigan, June 13, 1999
- Lightning Strike in Kentucky, June 13, 1999
More
Every storm in Michigan in 1999Every state in 1999This day in weather historyWarnings in Michigan, June 1999
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5708550, 5708548, 5708549.