Three waves of thunderstorms moved across southern and central Minnesota during the late afternoon of August 12th, through early Friday morning, August 13th.  Severe periods of severe weather occurred in the afternoon and evening before it became more of a heavy rainfall, and flash flooding event. Several reports of tornadoes, wind damage and large hail occurred from west-central Minnesota, through south central, and east-central Minnesota.  A tornado occurred in the town of Farmington, Minnesota during the odd hour of 3 am.

Flash Flood in CARVER, MINNESOTA
From 13-AUG-10 01:00:00 to 13-AUG-10 03:30:00 (CST-6)
Location: COLOGNE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several inches of rain fell across a large portion of Carver County between 1 and 4 AM CST.  Some areas in the town of Cologne, Minnesota had 12 inches of flowing water over its streets during the height of the storm.

Flash Flood in CARVER, MINNESOTA
From 13-AUG-10 01:15:00 to 13-AUG-10 03:30:00 (CST-6)
Location: CHASKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rain fell across a large portion of Carver County between 1 and 4 AM CST.  The town of Chaska, Minnesota, north of Highway 212 had four feet of flowing water over it during the height of the storm.

Flash Flood in CARVER, MINNESOTA
From 13-AUG-10 01:30:00 to 13-AUG-10 04:00:00 (CST-6)
Location: CARVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rain fell across a large portion of Carver County between 1 and 4 AM CST.  Some areas in the town of Carver, Minnesota had 8 inches of flowing water over most of their city streets during the height of the storm.

Flash Flood in HENNEPIN, MINNESOTA
From 13-AUG-10 02:00:00 to 13-AUG-10 04:00:00 (CST-6)
Location: DEEPHAVEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rain fell across a large portion of Hennepin County between 2 and 4 AM CST.  The town of Minnetonka, Minnesota had 12 inches of flowing water over Highway 7 during the height of the storm.

Thunderstorm Wind in RENVILLE, MINNESOTA
From 12-AUG-10 17:35:00 to 12-AUG-10 17:36:00 (CST-6)
Location: OLIVIA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large trees with diameters greater than 20 inches were blown down near Olivia, Minnesota.

Thunderstorm Wind in REDWOOD, MINNESOTA
From 12-AUG-10 17:19:00 to 12-AUG-10 17:20:00 (CST-6)
Location: DELHI
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down.

Thunderstorm Wind in STEVENS, MINNESOTA
From 12-AUG-10 17:47:00 to 12-AUG-10 17:48:00 (CST-6)
Location: MORRIS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large tree limbs were blown down near Morris, Minnesota, and a measured wind gust of 60 mph occurred at the Morris airport.

Hail in DOUGLAS, MINNESOTA
From 12-AUG-10 18:30:00 to 12-AUG-10 18:30:00 (CST-6)
Location: ALEXANDRIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in SCOTT, MINNESOTA
From 13-AUG-10 02:00:00 to 13-AUG-10 04:30:00 (CST-6)
Location: BELLE PLAINE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several inches of rain fell across a large portion of Scott County between 2 and 5 AM CST.  Some areas in the town of Belle Plaine, Minnesota had significant street flooding during the height of the storm. Some areas in Scott County measured nearly four inches of rainfall overnight.

Flash Flood in RICE, MINNESOTA
From 13-AUG-10 02:30:00 to 13-AUG-10 05:30:00 (CST-6)
Location: FARIBAULT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several inches of rain fell across a large portion of Rice County between 2 and 5 AM CST.  Some areas in the town of Faribault, Minnesota had significant street flooding during the height of the storm. Some areas of Rice County measured between three and 4.50 inches of rainfall overnight.

Flash Flood in DAKOTA, MINNESOTA
From 13-AUG-10 02:30:00 to 13-AUG-10 05:30:00 (CST-6)
Location: ROSEMOUNT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several inches of rain fell across a large portion of Dakota County between 2 and 5 AM CST.  Some areas between Apple Valley and Rosemount, Minnesota had flood waters reaching as high as car doors during the height of the storm.

Thunderstorm Wind in WRIGHT, MINNESOTA
From 12-AUG-10 18:52:00 to 12-AUG-10 18:52:00 (CST-6)
Location: MONTICELLO
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 14 inch diameter tree was uprooted near Monticello, Minnesota.

Hail in STEARNS, MINNESOTA
From 12-AUG-10 18:59:00 to 12-AUG-10 18:59:00 (CST-6)
Location: HOLDINGFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MILLE LACS, MINNESOTA
From 12-AUG-10 19:32:00 to 12-AUG-10 19:32:00 (CST-6)
Location: MILACA MUNI ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An 18 inch diameter tree was blown down near Milaca, Minnesota.

Thunderstorm Wind in CHISAGO, MINNESOTA
From 12-AUG-10 19:41:00 to 12-AUG-10 19:50:00 (CST-6)
Location: RUSH PT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large swath of trees were uprooted from east of Cambridge, or near County Road 2 and Highway 95, northeast to County Road 4 and 7 east of Stanchfield, Minnesota.

Hail in RENVILLE, MINNESOTA
From 12-AUG-10 22:30:00 to 12-AUG-10 22:30:00 (CST-6)
Location: SACRED HEART
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WATONWAN, MINNESOTA
From 12-AUG-10 22:57:00 to 12-AUG-10 22:57:00 (CST-6)
Location: DARFUR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BLUE EARTH, MINNESOTA
From 13-AUG-10 00:21:00 to 13-AUG-10 00:21:00 (CST-6)
Location: MINNEOPA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado in LAC QUI PARLE, MINNESOTA
From 12-AUG-10 17:22:00 to 12-AUG-10 17:24:00 (CST-6)
Location: LOUISBURG
Tornado F-scale: EF0
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement officials, spotters and chasers observed a brief tornado touchdown on the southern edge of Louisburg.  It picked up a grain bin at the Louisburg elevator and threw it 100 yards. Some trees were also uprooted near the same area.

Tornado in LAC QUI PARLE, MINNESOTA
From 12-AUG-10 16:54:00 to 12-AUG-10 16:56:00 (CST-6)
Location: MADISON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement officials and other spotters observed a rope-like tornado occasionally touching down southwest of Madison.  A damage survey noted a path through corn fields. It also knocked down several large trees and branches, dissipating near the northwest end of the Madison golf course.

Thunderstorm Wind in CARVER, MINNESOTA
From 13-AUG-10 01:20:00 to 13-AUG-10 01:21:00 (CST-6)
Location: CARVER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several large trees were blown down in Carver, Minnesota.

Thunderstorm Wind in CARVER, MINNESOTA
From 13-AUG-10 00:20:00 to 13-AUG-10 00:22:00 (CST-6)
Location: NORWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree branches were blown down near Norwood, Minnesota.

Thunderstorm Wind in STEELE, MINNESOTA
From 13-AUG-10 01:30:00 to 13-AUG-10 01:32:00 (CST-6)
Location: ELLENDALE
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A roof was blown off a grainery and a large tree was uprooted west of Ellendale, Minnesota.

Tornado in DAKOTA, MINNESOTA
From 13-AUG-10 02:04:00 to 13-AUG-10 02:08:00 (CST-6)
Location: FARMINGTON
Tornado F-scale: EF1
Property damage: 750.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A Storm Survey determined that an EF-1 tornado tracked to the northeast from three miles northwest of Farmington, to 3.3 miles north of Farmington, Minnesota.
The damage consisted of the following;
A few homes had large sections of roof structure removed. Numerous homes had significant roof damage, with loss of vinyl or metal siding. In addtion, numerous garage doors had collapsed or were pushed inward. One home had their entire garage shifted off its foundation by over 5 inches. Another home had their entire garage collapse, only leaving the main home intact. Due to several structures that had their foundations shifted and walls completely blown down, this tornado was rated a high end EF-1, which is approximately 105 mph. Most of the tornado damage was high end EF-0, or low end EF-1, or approximately 70 to 90 mph. Hundreds of trees were either uprooted or blown down. Several trees had diameters in excess of 30 inches.

Thunderstorm Wind in RICE, MINNESOTA
From 13-AUG-10 01:55:00 to 13-AUG-10 01:57:00 (CST-6)
Location: SHIELDSVILLE
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree branches were blown down near Shieldsville, Minnesota. In addition, a trained spotter measured a wind gust of 63 knots.

Thunderstorm Wind in GOODHUE, MINNESOTA
From 13-AUG-10 02:15:00 to 13-AUG-10 02:20:00 (CST-6)
Location: ROSCOE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several large trees that were blown down between Wanamingo and Roscoe, Minnesota.

Thunderstorm Wind in MCLEOD, MINNESOTA
From 12-AUG-10 18:10:00 to 12-AUG-10 18:11:00 (CST-6)
Location: HUTCHINSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree branches were blown down around Hutchison, Minnesota.

Thunderstorm Wind in WRIGHT, MINNESOTA
From 12-AUG-10 18:35:00 to 12-AUG-10 18:36:00 (CST-6)
Location: HOWARD LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several large tree branches were blown down near Howard Lake, Minnesota.

Funnel Cloud in SHERBURNE, MINNESOTA
From 12-AUG-10 18:39:00 to 12-AUG-10 18:40:00 (CST-6)
Location: BECKER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in STEARNS, MINNESOTA
From 12-AUG-10 18:39:00 to 12-AUG-10 18:40:00 (CST-6)
Location: PAYNESVILLE ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GOODHUE, MINNESOTA
From 13-AUG-10 02:25:00 to 13-AUG-10 02:26:00 (CST-6)
Location: TROUT BROOK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was blown down at County Road 45 and County Road 5 near Hay Creek Trail.

Hail in POPE, MINNESOTA
From 13-AUG-10 04:45:00 to 13-AUG-10 04:45:00 (CST-6)
Location: HAREB
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCLEOD, MINNESOTA
From 13-AUG-10 03:21:00 to 13-AUG-10 03:21:00 (CST-6)
Location: LESTER PRAIRIE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in LAC QUI PARLE, MINNESOTA
From 12-AUG-10 17:05:00 to 12-AUG-10 17:06:00 (CST-6)
Location: ROSEN
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Local law enforcement officials, spotters and chasers observed a brief tornado touchdown southwest of Bellingham. The tornado ripped off a building's porch roof.

Thunderstorm Wind in DOUGLAS, MINNESOTA
From 12-AUG-10 18:28:00 to 12-AUG-10 18:30:00 (CST-6)
Location: FORADA
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down near Hudson Township.

Hail in POPE, MINNESOTA
From 13-AUG-10 05:10:00 to 13-AUG-10 05:16:00 (CST-6)
Location: SEDAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several reports of nickel to quarter size hail was observed near Terrace and east of Terrace, Minnesota.

Hail in STEARNS, MINNESOTA
From 13-AUG-10 05:29:00 to 13-AUG-10 05:29:00 (CST-6)
Location: BROOTEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GOODHUE, MINNESOTA
From 13-AUG-10 02:17:00 to 13-AUG-10 02:20:00 (CST-6)
Location: HADER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down at the intersection of 410th street and County Road 8.

Tornado in STEARNS, MINNESOTA
From 12-AUG-10 18:44:00 to 12-AUG-10 18:54:00 (CST-6)
Location: BROOTEN
Tornado F-scale: EF1
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey determined that an EF-1 tornado touched down approximately two miles north of Brooten, and tracked to the northeast to approximately 2.5 miles west of Elrosa, Minnesota.  Hundreds of trees were snapped or uprooted. Several farmsteads were damaged. Roofs were blown off of barns, and several sheds and outbuildings, including grain bins were blown down.

Thunderstorm Wind in STEARNS, MINNESOTA
From 12-AUG-10 18:58:00 to 12-AUG-10 19:00:00 (CST-6)
Location: ST AUGUSTA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey determined that rear flank downdraft winds associated with the St Augusta tornado caused a couple dozen trees to blow down.

Tornado in STEARNS, MINNESOTA
From 12-AUG-10 19:00:00 to 12-AUG-10 19:01:00 (CST-6)
Location: ST AUGUSTA
Tornado F-scale: EF0
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey Team determined that an EF-0 tornado touched down on the east side of St. Augusta, Minnesota. Total path length was less than one-quarter of a mile, with several dozen trees blown down in a neighborhood on the east side of St. Augusta.

Thunderstorm Wind in STEARNS, MINNESOTA
From 12-AUG-10 19:08:00 to 12-AUG-10 19:09:00 (CST-6)
Location: PLEASANT LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey Team determined that downburst winds caused a couple dozen trees to topple just northwest of the intersection of Highway 15 and Interstate 94.

Thunderstorm Wind in STEARNS, MINNESOTA
From 12-AUG-10 19:01:00 to 12-AUG-10 19:06:00 (CST-6)
Location: MARTY
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey Team determined that downburst winds caused dozens of trees to blow down from the eastern edge of Grand Lake to approximately three miles east of Rockville, Minnesota.  One house suffered significant damage.

Thunderstorm Wind in SHERBURNE, MINNESOTA
From 12-AUG-10 19:10:00 to 12-AUG-10 19:11:00 (CST-6)
Location: CABLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service Storm Survey Team determined that downburst winds caused about two dozen trees to topple in the southeast part of St. Cloud.

Flash Flood in RENVILLE, MINNESOTA
From 12-AUG-10 22:15:00 to 13-AUG-10 01:00:00 (CST-6)
Location: SACRED HEART
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A section of Highway 212 near Sacred Heart was closed due to the flood waters. Some areas along Highway 212 had knee deep water during the height of the storm.

Flash Flood in RENVILLE, MINNESOTA
From 12-AUG-10 23:00:00 to 13-AUG-10 01:00:00 (CST-6)
Location: RENVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A section of Highway 212 near Renville, Minnesota, was closed due to the flood waters. Some areas along Highway 212 had 10 inches of flowing water over it during the height of the storm.

Flash Flood in MCLEOD, MINNESOTA
From 13-AUG-10 00:00:00 to 13-AUG-10 02:00:00 (CST-6)
Location: BROWNTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several inches of rainfall occurred between 11 PM CST to 1 AM CST across a large area of Mcleod County. Significant street flooding occurred in the town of Brownton, Minnesota where a few streets were closed during the height of the storm.

Flash Flood in CARVER, MINNESOTA
From 13-AUG-10 01:00:00 to 13-AUG-10 03:30:00 (CST-6)
Location: NORWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Several inches of rain fell across a large portion of Carver County between 1 and 4 AM CST.  Some areas in the town of Young America/Norwood, Minnesota had 12-18 inches of flowing water over its streets during the height of the storm.

Thunderstorm Wind in ISANTI, MINNESOTA
From 12-AUG-10 19:35:00 to 12-AUG-10 19:36:00 (CST-6)
Location: WALBO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree limbs were blown down near Walbo, Minnesota.

Thunderstorm Wind in WRIGHT, MINNESOTA
From 12-AUG-10 18:45:00 to 12-AUG-10 18:45:00 (CST-6)
Location: BUFFALO MUNI ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A few large tree branches were blown down near Buffalo, Minnesota.

Flash Flood in RENVILLE, MINNESOTA
From 12-AUG-10 23:00:00 to 13-AUG-10 01:00:00 (CST-6)
Location: OLIVIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several inches of rainfall occurred between 10 PM CST to 12 Midnight CST across a large area of Renville County. A section of Highway 212 near Olivia, Minnesota, had 12 inches of flowing water over it during the height of the storm. Some areas in Renville County measured over five inches of rainfall during the overnight hours.

Funnel Cloud in REDWOOD, MINNESOTA
From 12-AUG-10 17:00:00 to 12-AUG-10 17:01:00 (CST-6)
Location: WALNUT GROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MARTIN, MINNESOTA
From 12-AUG-10 23:30:00 to 12-AUG-10 23:32:00 (CST-6)
Location: FAIRMONT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lots of trees and power lines were blown down, especially west of Fairmont, Minnesota. In addition, a warehouse roof and large garage was damaged at an industrial park. Some damage also occurred at the Martin County fairgrounds.