Lake Michigan, 2021Marine Thunderstorm Winds in Lake Michigan, September 20, 2021
September 20, 2021 · NWS GRB · 2 events in 2 counties and zones
Strong thunderstorms developed ahead of a cold front tracking through the western Great Lakes during the evening hours. The strong storms brought gusty winds as they tracked over the bay of Green Bay and Lake Michigan nearshore waters.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 2
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.
Strong thunderstorms developed ahead of a cold front tracking through the western Great Lakes during the evening hours. The strong storms brought gusty winds as they tracked over the bay of Green Bay and Lake Michigan nearshore waters.
Marine Thunderstorm Wind, Green Bay South From Cedar River Mi to Rock Island Passage and North From Oconto Wi to Little Sturgeon Bay Wi
- When
- September 20, 10:36 PM CST to 10:37 PM CST
- Where
- Green Bay South From Cedar River Mi to Rock Island Passage and North From Oconto Wi to Little Sturgeon Bay Wi forecast zone, 10.9 mi ESE of Peshtigo Point
- Measured
- 34 kt (39 mph) measured gust
- Reported by
- AWOS
- Coordinates
- 44.915, -87.451
Thunderstorms produced a wind gust to 34 knots at the Door County Cherryland Airport in Sturgeon Bay.
Marine Thunderstorm Wind, Rock Island Passage to Sturgeon Bay Wi
- When
- September 20, 10:40 PM CST to 10:41 PM CST
- Where
- Rock Island Passage to Sturgeon Bay Wi forecast zone, 6.31 mi ESE of Sturgeon Bay
- Measured
- 34 kt (39 mph) measured gust
- Reported by
- AWOS
- Coordinates
- 44.809, -87.255
Thunderstorms produced a wind gust to 34 knots at the Door County Cherryland Airport in Sturgeon Bay.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- High Surf in California, September 20, 20211 death · 1 event
- Tornado and Damaging Winds in Wisconsin, September 20, 20211 injured · $469,000 · EF1 · 9 events
- Tornado and Hail in Minnesota, September 20, 2021$154,000 · EF0 · 7 events
- Damaging Winds in South Carolina, September 20, 2021$105,000 · 4 events
- Wildfire in Oklahoma, September 20, 2021$100,000 · 1 event
- Flash Flooding in Georgia, September 20, 2021$60,000 · 6 events
- Hail and Damaging Winds in Missouri, September 20, 2021$14,000 · 52 kt wind · 11 events
- Flash Flooding and Flood in Tennessee, September 20, 2021$10,000 · 13 events
- Damaging Winds in Missouri, September 20, 2021$15,000 · 61 kt wind · 2 events
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, September 20, 20217 events
- Flash Flooding and Damaging Winds in Wisconsin, September 20, 202152 kt wind · 7 events
- Hail in Kansas, September 20, 20211.75 in hail · 6 events
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 2026-10-01. Each event’s entry at NCEI: 975366, 975368.