A cold front moving through a moist and unstable air mass generated strong to severe thunderstorms across Lake Superior on the afternoon and evening of the 27th.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS MQT wrote it up.
A cold front moving through a moist and unstable air mass generated strong to severe thunderstorms across Lake Superior on the afternoon and evening of the 27th.
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 Aug 27, 1:11 PM EST, 1 hour 20 minutes earlier.
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</html>The Marquette radar (KMQT), 33 km away, was scanning. The volume nearest the first event began at 19:31 UTC.
24 marine thunderstorm wind, 1 waterspout, 1 marine hail. Local standard time, as filed.
A waterspout was observed from the Big Bay Lighthouse.
There was an estimated thunderstorm wind gust of 60 mph in Marquette.
There was an estimated thunderstorm wind gust of 60 mph in Marquette.
There was an estimated thunderstorm wind gust of 60 mph in Marquette.
There was an estimated thunderstorm wind gust of 60 mph in Marquette.
Peak thunderstorm wind gust at the Granite Light GLOS station.
Peak thunderstorm wind gust at the Granite Light GLOS station.
The Munising ASOS measured a thunderstorm wind gust of 45 mph.
The Munising ASOS measured a thunderstorm wind gust of 45 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 51 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 51 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 51 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 51 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 43 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 43 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 43 mph.
The Grand Marais GLOS station measured a thunderstorm wind gust of 43 mph.
There was a ship report just north of Whitefish Point of a thunderstorm wind gust of 60 mph. Waterspouts were also sighted. The report was relayed via NWS Gaylord and the Sault Ste. Marie Coast Guard.
There was a ship report just north of Whitefish Point of a thunderstorm wind gust of 60 mph. Waterspouts were also sighted. The report was relayed via NWS Gaylord and the Sault Ste. Marie Coast Guard.
The Granite Island Light GLOS station measured a peak thunderstorm wind gust of 49 mph.
The Granite Island Light GLOS station measured a peak thunderstorm wind gust of 49 mph.
The Granite Island Light GLOS station measured a peak thunderstorm wind gust of 49 mph.
The Stannard Rock Light station measured a peak thunderstorm wind gust of 59 mph.
Nickel-sized hail was reported just west of the Marquette-Alger county line.
The eastern Lake Superior buoy measured a peak thunderstorm wind gust of 43 mph.
The eastern Lake Superior buoy measured a peak thunderstorm wind gust of 43 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Superior in 2019Every state in 2019This day in weather history
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: 852012, 852014, 852016, 852018, 852019, 852006, 852007, 852100, 852101, 852103, 852104, 852106, 852107, 852110, 852112, 852113, 852114, 853043, 853044, 853052, 853053, 853054, 853050, 853048, 853055, 853056.