A cold front moving slowly across the region served as the focus for severe thunderstorms over portions of Upper Michigan from the evening of the 18th into the afternoon of the 19th.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 18-JUL-13 18:16:00 to 18-JUL-13 18:19:00 (EST-5)
Location: MARTINS LNDG
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

A six-inch diameter tree was knocked down, and other trees were bending considerably in the strong wind.

Thunderstorm Wind in LUCE, MICHIGAN
From 18-JUL-13 18:35:00 to 18-JUL-13 18:39:00 (EST-5)
Location: DEER PARK
Magnitude: 55.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported six to eight-inch diameter trees down blocking County Road 407 to the west of Muskallonge Lake State Park.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 18-JUL-13 18:39:00 to 18-JUL-13 18:43:00 (EST-5)
Location: EAGLE MILLS
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: NWS Employee

A tree was knocked down and blocked part of Highway M-35 near Negaunee just south of Highway US-41.

Thunderstorm Wind in LUCE, MICHIGAN
From 18-JUL-13 18:45:00 to 18-JUL-13 18:50:00 (EST-5)
Location: PINE STUMP JCT
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Trees were observed down along and near County Road 407.  Time of the report was estimated from radar.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 18-JUL-13 19:01:00 to 18-JUL-13 19:05:00 (EST-5)
Location: SANDS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were knocked down, one of which damaged a house deck.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 18-JUL-13 21:16:00 to 18-JUL-13 21:21:00 (EST-5)
Location: ALCONE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated over 60 mph near Kearsarge.  There were reports on 800 MHz radio of trees and power lines down across the Keweenaw Peninsula.

Thunderstorm Wind in DELTA, MICHIGAN
From 19-JUL-13 12:10:00 to 19-JUL-13 12:20:00 (EST-5)
Location: ESCANABA
Magnitude: 55.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Escanaba Public Safety reported widespread trees and power lines downed in Delta County, including the towns of Escanaba, Gladstone and Rapid River.

Funnel Cloud in DELTA, MICHIGAN
From 19-JUL-13 12:22:00 to 19-JUL-13 12:26:00 (EST-5)
Location: GARDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter observed a funnel cloud near Garden.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 19-JUL-13 04:07:00 to 19-JUL-13 04:10:00 (EST-5)
Location: SOUTH REPUBLIC
Magnitude: 70.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm straight-line winds caused significant damage along the south end of Helen Lake near Republic.  The damage path associated with this storm was about one half mile long and roughly 200 yards wide.  The winds were estimated to be around 80 mph, causing over 100 trees to be snapped or uprooted.  Some of these trees actually landed on camps as well as other structures causing significant damage.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 19-JUL-13 04:26:00 to 19-JUL-13 04:29:00 (EST-5)
Location: NEW SWANZY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

The Michigan DNR reported numerous large trees were uprooted or snapped.

Thunderstorm Wind in BARAGA, MICHIGAN
From 18-JUL-13 17:41:00 to 18-JUL-13 17:45:00 (EST-5)
Location: L ANSE
Magnitude: 56.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Storms caused sporadic straight-line wind damage over a path roughly one mile long and about one-half mile wide.  The estimated 65 mph peak winds uprooted trees and broke off large limbs. One tree fell on a mobile home while the owner was sitting nearby and caused a fire to break out in the kitchen when it landed on a stove.  Fallen trees caused damage to other houses and totaled at least one vehicle.  In addition a portion of the roof of the county road commission garage was tore off.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 19-JUL-13 04:21:00 to 19-JUL-13 04:24:00 (EST-5)
Location: PALMER
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

The Michigan DNR reported numerous large trees were uprooted or snapped.

Thunderstorm Wind in LUCE, MICHIGAN
From 18-JUL-13 18:37:00 to 18-JUL-13 18:42:00 (EST-5)
Location: DEER PARK
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Fifty trees were knocked down at Muskallonge Lake State Park.  Some trees fell on campers, tents, and outbuildings, but no injuries were reported.

Hail in SCHOOLCRAFT, MICHIGAN
From 18-JUL-13 18:16:00 to 18-JUL-13 18:19:00 (EST-5)
Location: THOMPSON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to nickel-sized hail was reported along with 40 mph wind gusts.