Storms moved across the area during the early morning of 8/12. Initial disorganized storms evolved into two distinct, organized multi-cell clusters. One tracking from Bristol ENE through Middlebury, Constantine, Sturgis, Coldwater, Jonesville, HIllsdale and Moscow. The second tracked from Francesville ENE through Winimac, Rochester, Mentone, Warsaw, Syracuse, and Albion. Both were characterized by downbursting cores which tapped into an exceptional strong mid level jet (winds in excess of 70kts) which lead to extensive tree and powerline damage. Multiple homes were also impacted from falling trees.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:36:00 to 12-AUG-21 04:37:00 (EST-5)
Location: CONSTANTINE
Magnitude: 52.00 EG
Reported by: Public

Rotted tree snapped in half.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:39:00 to 12-AUG-21 04:45:00 (EST-5)
Location: WHITE PIGEON
Magnitude: 56.00 EG
Reported by: Public

Trees down across the town of White Pigeon.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:46:00 to 12-AUG-21 04:50:00 (EST-5)
Location: STURGIS
Magnitude: 61.00 EG
Reported by: Public

Trees down and power outages across Sturgis.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:46:00 to 12-AUG-21 04:55:00 (EST-5)
Location: KIRSCH MUNI ARPT
Magnitude: 61.00 EG
Reported by: Public

Several large 200 year old oak trees uprooted or snapped, approximately 1-3 feet diameter. Numerous 1-2 foot diameter limbs down. Trees appeared healthy. Water from the lake moving inland into the backyards of properties.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:53:00 to 12-AUG-21 05:00:00 (EST-5)
Location: KINGS MILL
Magnitude: 61.00 EG
Reported by: Trained Spotter

Numerous trees down or damaged from M60 at the St. Joseph-Branch county line, west to M66, and then south to Sturgis.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:57:00 to 12-AUG-21 05:00:00 (EST-5)
Location: COLON
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Two foot diameter healthy tree snapped in half, and thrown into a house causing roof and gutter damage.

Thunderstorm Wind in ST. JOSEPH, MICHIGAN
From 12-AUG-21 04:57:00 to 12-AUG-21 05:00:00 (EST-5)
Location: FINDLEY
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Healthy 1 to 3 ft diameter tree uprooted and downed on a garage. A tree with partial rotting was snapped at the base and the top limbs damaged a house. Several smaller 3 to 6 inch limbs down around porperty. Powerlines bent or down as well.

Thunderstorm Wind in BRANCH, MICHIGAN
From 12-AUG-21 05:04:00 to 12-AUG-21 05:05:00 (EST-5)
Location: COLDWATER
Magnitude: 56.00 EG
Reported by: Public

Trees downed on Union City Road and State Road.

Thunderstorm Wind in BRANCH, MICHIGAN
From 12-AUG-21 05:07:00 to 12-AUG-21 05:10:00 (EST-5)
Location: MATTESON
Magnitude: 61.00 EG
Reported by: Public

Trees uprooted or snapped. Roof blown off. Reported from MPing.

Thunderstorm Wind in BRANCH, MICHIGAN
From 12-AUG-21 05:08:00 to 12-AUG-21 05:09:00 (EST-5)
Location: COLDWATER ARPT
Magnitude: 51.00 MG
Reported by: AWOS

Thunderstorm Wind in BRANCH, MICHIGAN
From 12-AUG-21 05:10:00 to 12-AUG-21 05:11:00 (EST-5)
Location: COLDWATER
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

One to two foot diameter tree and several limbs down on a house causing gutter and siding damage.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 05:18:00 to 12-AUG-21 05:20:00 (EST-5)
Location: BANKERS
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous branches down, damaging a car. Estimated 12-14 inches in diameter. Tree uprooted.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 05:18:00 to 12-AUG-21 05:20:00 (EST-5)
Location: BANKERS
Magnitude: 56.00 EG
Reported by: Trained Spotter

Tree tops snapped and trees uprooted. Wires down.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 05:20:00 to 12-AUG-21 05:25:00 (EST-5)
Location: MOSCOW
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Three foot diameter tree snapped. Large 1-2 ft diameter limb down. Power pole snapped and leaning on a house. Damage along Mosherville Rd at 2 separate residences.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 05:23:00 to 12-AUG-21 05:25:00 (EST-5)
Location: HILLSDALE
Magnitude: 56.00 EG
Reported by: Public

Three inch tree limbs broken. Power poles broken. Report from MPing.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 05:25:00 to 12-AUG-21 05:30:00 (EST-5)
Location: HILLSDALE
Magnitude: 56.00 EG
Reported by: Public

Multiple trees down in Hillsdale.

Thunderstorm Wind in HILLSDALE, MICHIGAN
From 12-AUG-21 17:20:00 to 12-AUG-21 17:22:00 (EST-5)
Location: JEROME
Magnitude: 56.00 EG
Reported by: Trained Spotter

A few trees down.