Lake Michigan, 2020

Marine Thunderstorm Winds in Lake Michigan, July 10, 2020

July 10, 2020 · NWS MQT · 3 events in 3 counties and zones

Remnants of a convective complex produced strong thunderstorms over the Bay of Green Bay early on the 10th.

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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
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 MQT wrote it up.

Remnants of a convective complex produced strong thunderstorms over the Bay of Green Bay early on the 10th.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Marquette, MI wrote its last area forecast discussion before the first event at Jul 9, 5:52 PM EST, 7 hours 41 minutes earlier.

Area forecast discussion, Jul 9, 5:52 PM EST, 7 hours 41 minutes before
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Hazardous weather outlook, Jul 9, 2:13 PM EST, 11 hours 20 minutes before
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The radar

The Marquette radar (KMQT), 114 km away, was scanning. The volume nearest the first event began at 06:32 UTC.

Open the radar archive at this moment

Event by event

3 marine thunderstorm wind. Local standard time, as filed.

Marine Thunderstorm Wind, Green Bay N From Cedar River Mi to Rock Island Passage

When
July 10, 1:33 AM EST to 1:43 AM EST
Where
Green Bay N From Cedar River Mi to Rock Island Passage forecast zone, 6.39 mi SSW of Point Peninsula Light
Measured
42 kt (48 mph) measured gust
Reported by
Mesonet
Coordinates
45.580, -87.000

Thunderstorm wind gust measured at the Minneapolis Shoal Light station.

Marine Thunderstorm Wind, 5nm E of Fairport Mi to Rock Island Passage

When
July 10, 1:50 AM EST to 2:00 AM EST
Where
5nm E of Fairport Mi to Rock Island Passage forecast zone, 2.78 mi WNW of Point Detour
Measured
35 kt (40 mph) measured gust
Reported by
Mesonet
Coordinates
45.620, -86.660

Thunderstorm wind gust measured by the Fairport GLOS station.

Marine Thunderstorm Wind, Seul Choix Point to Point Detour Mi

When
July 10, 1:50 AM EST to 2:00 AM EST
Where
Seul Choix Point to Point Detour Mi forecast zone, 2.78 mi WNW of Point Detour
Measured
35 kt (40 mph) measured gust
Reported by
Mesonet
Coordinates
45.620, -86.660

Thunderstorm wind gust measured by the Fairport GLOS station.

What these are

Marine Thunderstorm Wind
Thunderstorm winds of 34 knots or more over coastal or lake waters.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Lake Michigan in 2020Every state in 2020This day in weather history

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 2026-10-01. Each event’s entry at NCEI: 906805, 906804, 908570.