A cold front moving through an unstable air mass generated strong thunderstorms over portions of western Lake Superior during the evening of the 16th.
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 an unstable air mass generated strong thunderstorms over portions of western Lake Superior during the evening of the 16th.
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 16, 6:36 PM EST, 1 hour 14 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Marquette MI 315 PM EDT Wed Aug 16 2023 MIZ001>007-009>012-084-085-171915- Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce- Gogebic-Iron-Dickinson-Menominee-Southern Houghton- Northern Schoolcraft- 315 PM EDT Wed Aug 16 2023 /215 PM CDT Wed Aug 16 2023/ This Hazardous Weather Outlook is for portions of central Upper Michigan and western Upper Michigan. .DAY ONE...Tonight A few south/southwesterly gusts up to 40 mph could be seen through this evening. Thunderstorms are possible over the UP tonight. A few strong to severe thunderstorm winds could be seen. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms are possible across the UP Thursday. The potential for rip currents will be high along the shorelines of Lake Superior Thursday, creating high swim risk conditions. See the latest Surf Zone Forecast for additional details. Some minor lakeshore flooding and beach erosion is possible along the Lake Superior shoreline Thursday and Thursday night. There is growing confidence in well above normal to near record temperatures this weekend into early next week. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. MIZ013-014-171915- Delta-Southern Schoolcraft- 315 PM EDT Wed Aug 16 2023 This Hazardous Weather Outlook is for portions of central Upper Michigan. .DAY ONE...Tonight The potential for rip currents will be high along the shorelines of Lake Michigan into this evening, creating high swim risk conditions. See the latest Beach Hazard Statement and Surf Zone Forecast for additional details. Thunderstorms are possible tonight. A few strong to severe thunderstorm winds are possible. Building waves as high as 8 to 11 feet from strong south to southwesterly winds could cause some beach erosion and minor lakeshore flooding tonight, especially from the Garden Peninsula east to Seul Choix Point. See the latest Lakeshore Flood Advisory for additional details. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms are possible Thursday. Building waves as high as 5 to 10 feet could cause some beach erosion and minor lakeshore flooding early Thursday, especially from the Garden Peninsula east to Seul Choix Point. See the latest Lakeshore Flood Advisory for additional details. The potential for rip currents will be high along the shorelines of Lake Michigan Thursday, creating high swim risk conditions. See the latest Surf Zone Forecast for additional details. There is growing confidence in well above normal to near record temperatures this weekend into early next week. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LSZ162-240>251-263>267-171915- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM-Saxon Harbor WI to Black River MI- Black River to Ontonagon MI- Ontonagon to Upper Entrance of Portage Canal MI- Upper Entrance of Portage Canal to Eagle River MI- Eagle River to Manitou Island MI- Manitou Island to Point Isabelle MI- Point Isabelle to Lower Entrance of Portage Canal MI- Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays-Huron Islands to Marquette MI- Marquette to Munising MI-Munising to Grand Marais MI- Grand Marais to Whitefish Point MI- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 315 PM EDT Wed Aug 16 2023 /215 PM CDT Wed Aug 16 2023/ This Hazardous Weather Outlook is for portions of Central Lake Superior...Eastern Lake Superior and Western Lake Superior. .DAY ONE...Tonight Thunderstorms are possible this evening through tonight. A few strong to severe thunderstorm winds could be seen. Southerly gales up to 40 knots are expected this evening through early tonight across the eastern half of the lake. See the latest Open Lake Forecast and Marine Weather Message for additional details. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Northwesterly gales up to 40 kts are expected Thursday. See the latest Open Lake Forecast and Marine Weather Message for additional details. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LMZ221-248-250-171915- Green Bay North of line from Cedar River MI to Rock Island Passage-Seul Choix Point to Point Detour MI- 5NM East of a line from Fairport MI to Rock Island Passage- 315 PM EDT Wed Aug 16 2023 This Hazardous Weather Outlook is for portions of Northern Lake Michigan. .DAY ONE...Tonight South to southwesterly gales up to 40 kts are expected this evening through tonight. See the latest Nearshore Forecast and Marine Weather Message for additional details. Thunderstorms are possible late tonight. A few strong to severe thunderstorm winds could be seen. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms are possible early Thursday. .SPOTTER INFORMATION STATEMENT... The need for weather spotter reports is not anticipated at this time. LC
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</html>The Marquette radar (KMQT), 198 km away, was scanning. The volume nearest the first event began at 00:49 UTC.
3 marine thunderstorm wind. Local standard time, as filed.
The Passage Island Light C-MAN station recorded a thunderstorm wind gust of 49 mph.
The Ontonagon Light GLOS station measured a thunderstorm wind gust of 48 mph.
The Ontonagon Light GLOS station measured a thunderstorm wind gust of 48 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Superior in 2023Every state in 2023This 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: 1131467, 1131468, 1131469.