Strong thunderstorm-induced winds and waves battered the shorelines of Sand, Rocky and Outer Islands of the Apostle Islands. The winds and waves damaged moored boats by pushing the boats into shore.
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 DLH wrote it up.
Strong thunderstorm-induced winds and waves battered the shorelines of Sand, Rocky and Outer Islands of the Apostle Islands. The winds and waves damaged moored boats by pushing the boats into shore. Two of the eight vessels involved had to be towed back to the mainland and one was partially sunk.
The Duluth radar (KDLH), 98 km away, was scanning. The volume nearest the first event began at 04:05 UTC.
1 marine thunderstorm wind. Local standard time, as filed.
Moored boats were severely damaged as thunderstorm winds pushed them into the shoreline.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Superior in 2017Every state in 2017This 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: 721132.