On Sunday afternoon August 2nd, a warm frontal boundary lied across central Minnesota, with a strong cold front across the central Dakotas. Initially, very dry air around 5000' and a strong cap prevented thunderstorm development across most of  Minnesota until the late evening, when a surge of low level moisture from the south, and the instability leftover from the afternoon, generated a few strong storms across southwest Minnesota during the evening. The strong storms across southwest Minnesota quickly became severe with very large hail reported. A wall cloud was also reported south of Redwood Falls. The storms quickly moved east and southeast across central and south central Minnesota where additional large hail fell.

Hail in REDWOOD, MINNESOTA
From 02-AUG-09 21:02:00 to 02-AUG-09 21:02:00 (CST-6)
Location: CLEMENTS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RENVILLE, MINNESOTA
From 02-AUG-09 20:43:00 to 02-AUG-09 20:45:00 (CST-6)
Location: BECHYN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trained spotters reported quarter to golf ball size hail.

Hail in REDWOOD, MINNESOTA
From 02-AUG-09 20:53:00 to 02-AUG-09 21:58:00 (CST-6)
Location: ROWENA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trained spotters reported quarter to hen egg size hail.

Hail in REDWOOD, MINNESOTA
From 02-AUG-09 20:36:00 to 02-AUG-09 20:36:00 (CST-6)
Location: LOUCAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in REDWOOD, MINNESOTA
From 02-AUG-09 20:32:00 to 02-AUG-09 20:32:00 (CST-6)
Location: SEAFORTH
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, MINNESOTA
From 02-AUG-09 21:10:00 to 02-AUG-09 21:10:00 (CST-6)
Location: SPRINGFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MCLEOD, MINNESOTA
From 02-AUG-09 21:25:00 to 02-AUG-09 21:25:00 (CST-6)
Location: HEATWOLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MCLEOD, MINNESOTA
From 02-AUG-09 21:36:00 to 02-AUG-09 21:36:00 (CST-6)
Location: STEWART
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in HENNEPIN, MINNESOTA
From 02-AUG-09 22:13:00 to 02-AUG-09 22:15:00 (CST-6)
Location: BIRCH BLUFF
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A local law enforcement official reported large trees down east of County Road 19 and Tonka Bay Road, and at County Road 19 and Minnetonka Drive.

Hail in BLUE EARTH, MINNESOTA
From 02-AUG-09 21:50:00 to 02-AUG-09 21:55:00 (CST-6)
Location: PERTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCLEOD, MINNESOTA
From 02-AUG-09 21:50:00 to 02-AUG-09 21:56:00 (CST-6)
Location: BROWNTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MCLEOD, MINNESOTA
From 02-AUG-09 21:27:00 to 02-AUG-09 21:30:00 (CST-6)
Location: HEATWOLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local storm spotters and law enforcement officials reported quarter to golf ball size hail.

Hail in SIBLEY, MINNESOTA
From 02-AUG-09 22:14:00 to 02-AUG-09 22:14:00 (CST-6)
Location: NEW AUBURN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WATONWAN, MINNESOTA
From 02-AUG-09 21:40:00 to 02-AUG-09 21:40:00 (CST-6)
Location: LA SALLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in YELLOW MEDICINE, MINNESOTA
From 02-AUG-09 20:00:00 to 02-AUG-09 20:00:00 (CST-6)
Location: HANLEY FALLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in RENVILLE, MINNESOTA
From 02-AUG-09 21:08:00 to 02-AUG-09 21:08:00 (CST-6)
Location: HECTOR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RENVILLE, MINNESOTA
From 02-AUG-09 20:50:00 to 02-AUG-09 20:54:00 (CST-6)
Location: BIRD ISLAND
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A local storm chaser and a trained spotter reported golf ball to baseball size hail covering the ground.