Lake Superior, 2007

Marine Thunderstorm Winds in Lake Superior, June 18, 2007

June 18, 2007 · NWS MQT · 3 events in 2 counties and zones

Thunderstorms produced strong wind over Lake Superior on the 18th.

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

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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.

Thunderstorms produced strong wind over Lake Superior on the 18th.

The radar

The Marquette radar (KMQT), 187 km away, was scanning. The volume nearest the first event began at 16:00 UTC.

Open the radar archive at this moment

Event by event

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

Marine Thunderstorm Wind, Ls E of Ln From Saxon Hbr Wi to Grand Portage Mn to Ln Manitou Is Mi Nwd Byd 5nm and S of Intl Border

When
June 18, 11:00 AM EST
Where
Ls E of Ln From Saxon Hbr Wi to Grand Portage Mn to Ln Manitou Is Mi Nwd Byd 5nm and S of Intl Border forecast zone, Rock of Ages Light
Measured
36 kt (41 mph) measured gust
Reported by
C-MAN Station
Coordinates
47.770, -89.220

Measured wind gust to 36 knots.

Marine Thunderstorm Wind, Munising to Grand Marais Mi

When
June 18, 7:21 PM EST
Where
Munising to Grand Marais Mi forecast zone, 3.5 mi SSW of Grand Is. Harbor Lt
Measured
40 kt (46 mph) measured gust
Reported by
ASOS
Coordinates
46.553, -86.678

Measured 40-knot gust at the Munising ASOS.

Marine Thunderstorm Wind, Munising to Grand Marais Mi

When
June 18, 7:28 PM EST
Where
Munising to Grand Marais Mi forecast zone, 3.5 mi SSW of Grand Is. Harbor Lt
Measured
50 kt (58 mph) estimated gust
Reported by
Trained Spotter
Coordinates
46.553, -86.678

A few two-inch diameter tree branches down in Munising.

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 Superior in 2007Every state in 2007This 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: 41926, 41933, 41931.