On the morning of the 13th, one large supercell tracked across southwest Benson County (ND) and western Eddy County (ND). This storm tracked southeast toward northern Barnes County (ND), then weakened as it moved into Cass County (ND). A second large supercell then developed in Towner County (ND) and tracked toward Thompson, ND. As the second storm moved into southeast Grand Forks County (ND), additional storms developed to the east along and just south of the U.S. Highway 2 corridor in Minnesota. As the second supercell moved across eastern Ramsey and northern Nelson Counties (in ND), it displayed a classic hook echo on radar.

Hail in BELTRAMI, MINNESOTA
From 13-AUG-07 18:06:00 to 13-AUG-07 18:09:00 (CST-6)
Location: DEBS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in BELTRAMI, MINNESOTA
From 13-AUG-07 18:55:00 to 13-AUG-07 18:55:00 (CST-6)
Location: TENSTRIKE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POLK, MINNESOTA
From 13-AUG-07 16:15:00 to 13-AUG-07 16:15:00 (CST-6)
Location: MELVIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POLK, MINNESOTA
From 13-AUG-07 16:30:00 to 13-AUG-07 16:30:00 (CST-6)
Location: MENTOR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime to quarter sized hail fell near Maple Lake.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 13-AUG-07 17:45:00 to 13-AUG-07 17:45:00 (CST-6)
Location: HUBBARD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage was reported near Duck Lake.

Hail in POLK, MINNESOTA
From 13-AUG-07 16:54:00 to 13-AUG-07 16:54:00 (CST-6)
Location: MC INTOSH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEARWATER, MINNESOTA
From 13-AUG-07 17:18:00 to 13-AUG-07 17:18:00 (CST-6)
Location: PINE LAKE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WADENA, MINNESOTA
From 13-AUG-07 17:45:00 to 13-AUG-07 17:45:00 (CST-6)
Location: HUNTERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage was reported near Duck Lake.

Hail in WADENA, MINNESOTA
From 13-AUG-07 17:35:00 to 13-AUG-07 17:35:00 (CST-6)
Location: OYLEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The hail was accompanied by 40 to 50 mph wind gusts (estimated).

Hail in WADENA, MINNESOTA
From 13-AUG-07 17:35:00 to 13-AUG-07 17:35:00 (CST-6)
Location: NIMROD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The hail was 3 inches deep.

Hail in BELTRAMI, MINNESOTA
From 13-AUG-07 17:52:00 to 13-AUG-07 17:52:00 (CST-6)
Location: PUPOSKY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The hail fell on highway 89 near Deer Lake.

Hail in CLEARWATER, MINNESOTA
From 13-AUG-07 18:05:00 to 13-AUG-07 18:05:00 (CST-6)
Location: CLEARBROOK
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WADENA, MINNESOTA
From 13-AUG-07 17:30:00 to 13-AUG-07 17:30:00 (CST-6)
Location: SEBEKA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several trees were blown down.

Hail in BELTRAMI, MINNESOTA
From 13-AUG-07 18:30:00 to 13-AUG-07 18:30:00 (CST-6)
Location: BIRCHMONT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter