A warm front lifting across the region produced strong thunderstorms over portions of western Lake Superior during the day of the 25th.  A cold front moving through later that night brought a few strong thunderstorms to the west half of Lake Superior.

Marine Thunderstorm Wind in ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 25-JUN-16 11:20:00 to 25-JUN-16 11:30:00 (EST-5)
Location: KEWEENAW UPR ENT LT
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Buoy 45023 near the north entrance of the Portage Canal measured a peak thunderstorm wind gust to 47 mph.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 25-JUN-16 11:20:00 to 25-JUN-16 11:30:00 (EST-5)
Location: KEWEENAW UPPER ENTRY LIGHT
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Buoy 45023 near the north entrance of the Portage Canal measured a peak thunderstorm wind gust to 47 mph.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 25-JUN-16 11:13:00 to 25-JUN-16 11:20:00 (EST-5)
Location: MCCLAIN STATE PARK
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The GLOS observing site at Portage Canal measured a peak thunderstorm wind gust of 41 mph.

Marine Thunderstorm Wind in EAGLE RIVER TO MANITOU ISLAND MI, LAKE SUPERIOR
From 25-JUN-16 11:33:00 to 25-JUN-16 11:40:00 (EST-5)
Location: COPPER HARBOR
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Copper Harbor ASOS measured a peak thunderstorm wind gust of 35 knots.

Marine Thunderstorm Wind in POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 25-JUN-16 11:40:00 to 25-JUN-16 11:45:00 (EST-5)
Location: TRAVERSE BAY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The GLOS site at Grand Traverse Bay measured a peak thunderstorm wind gust of 37 knots.

Marine Thunderstorm Wind in MANITOU ISLAND TO MARQUETTE MI BEYOND 5NM FROM SHORE, LAKE SUPERIOR
From 25-JUN-16 13:10:00 to 25-JUN-16 13:15:00 (EST-5)
Location: MARQUETTE
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The GLOS site at Grand Island Light measured a peak thunderstorm wind gust of 44 knots.

Marine Thunderstorm Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 25-JUN-16 12:40:00 to 25-JUN-16 12:45:00 (EST-5)
Location: BIG BAY POINT LIGHT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The GLOS site at Big Bay measured a peak thunderstorm wind gust of 37 knots.

Marine Thunderstorm Wind in ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 25-JUN-16 21:10:00 to 25-JUN-16 21:15:00 (EST-5)
Location: BEACON HILL
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter in Freda measured a peak thunderstorm wind gust of 40 mph.

Marine Thunderstorm Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 25-JUN-16 22:50:00 to 25-JUN-16 22:55:00 (EST-5)
Location: BIG BAY POINT LIGHT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The GLOS site at Big Bay measured a peak thunderstorm wind gust of 35 knots.