Lake Superior, 2016

Marine Thunderstorm Wind in Lake Superior, September 19, 2016

September 19, 2016 · NWS MQT · 1 event in 1 county or zone

A vigorous upper disturbance moving through an unstable air mass produced a strong thunderstorm at Rock of Ages Light in the early morning of the 19th.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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.

A vigorous upper disturbance moving through an unstable air mass produced a strong thunderstorm at Rock of Ages Light in the early morning of the 19th.

The radar

The Marquette radar (KMQT), 187 km away, was scanning. The volume nearest the first event began at 06:28 UTC.

Open the radar archive at this moment

Event by event

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

Marine Thunderstorm Wind, Saxon Harbor Wi to Upper Entrance of Portage Canal Mi 5nm Offshore to Us/Canadian Border Inc Isle Royal Np

When
September 19, 1:29 AM EST to 1:34 AM EST
Where
Saxon Harbor Wi to Upper Entrance of Portage Canal Mi 5nm Offshore to Us/Canadian Border Inc Isle Royal Np forecast zone, Rock of Ages Light
Measured
39 kt (45 mph) measured gust
Reported by
C-MAN Station
Coordinates
47.770, -89.220

The Rock of Ages Light C-MAN station measured a thunderstorm wind gust of 45 mph.

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 2016Every state in 2016This 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: 658942.