A deep low pressure system moving through northwest Ontario pushed a warm front across western Upper Michigan in the morning hours...followed by a cold frontal passage in the afternoon.  The frontal boundaries produced several severe thunderstorms and two weak tornadoes over western Upper Michigan on the 19th.

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 19-AUG-11 16:28:00 to 19-AUG-11 16:31:00 (CST-6)
Location: EDGEWOOD BEACH
Magnitude: 55.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Eight to ten-inch diameter tree down on road.

Hail in MENOMINEE, MICHIGAN
From 19-AUG-11 15:05:00 to 19-AUG-11 15:08:00 (CST-6)
Location: EAGLES NEST
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in MENOMINEE, MICHIGAN
From 19-AUG-11 15:56:00 to 19-AUG-11 15:57:00 (CST-6)
Location: LONGRIE
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

About a dozen trees were uprooted and numerous branches broken in the Escanaba River State Forest along the Menominee River.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 19-AUG-11 06:47:00 to 19-AUG-11 07:05:00 (EST-5)
Location: SILVER CITY
Magnitude: 60.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

The spotter at the headquarters of Porcupine Mountains State Park reported severe downdrafts, trees falling, dime-sized hail, significant lightning and heavy rain and runoff for approximately 20 minutes.  Four large trees fell across roads, blocking lanes in the park.

Tornado in ONTONAGON, MICHIGAN
From 19-AUG-11 07:05:00 to 19-AUG-11 07:09:00 (EST-5)
Location: ONTONAGON
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A strong EF0 tornado with winds estimated around 85 mph touched down at the River Pines RV Park and Campground and then skipped northeastward across the village lifting on the east side of the Ontonagon Golf Course.  Most of the damage was confined to snapped and uprooted trees, snapped power poles, a small flipped boat, minor roof damage, and some structural damage to a garage.  There were no injuries.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 19-AUG-11 07:15:00 to 19-AUG-11 07:18:00 (EST-5)
Location: WAINOLA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An apple tree six inches in diameter was knocked down.  Various tree branches three inches in diameter were also down.  Hanging plants were blown off the porch.

Hail in BARAGA, MICHIGAN
From 19-AUG-11 14:35:00 to 19-AUG-11 14:37:00 (EST-5)
Location: WATTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts were estimated at 30 mph from the storm.

Hail in MARQUETTE, MICHIGAN
From 19-AUG-11 15:55:00 to 19-AUG-11 15:59:00 (EST-5)
Location: SOUTH REPUBLIC
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pea to penny-sized hail was also reported 3.5 miles south of Republic.

Hail in MENOMINEE, MICHIGAN
From 19-AUG-11 09:05:00 to 19-AUG-11 09:07:00 (CST-6)
Location: DAGGETT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter