| May 1996 | Thunderstorm Wind | Owatonna | $5,000,000 | no account filed |
| October 2007 | Flash Flood | Owatonna | $3,000,000 | Three to five inches of rain fell over Owatonna, resulting in flooding of roads, homes and businesses. A city storm sewer also backed up, causing basements to flood in about 40 homes. This event began September 30, 2007 at 2200 CST (see September 2007 Storm Data). |
| August 2007 | Flash Flood | Owatonna | $2,500,000 | A Presidential Disaster Declaration was signed for Steele County in the wake of major flooding and damage. Large areas of Owatonna were reported under two to three feet of water. Water completely covered a few roads, and was above car doors in some areas. Maple Creek at Dartt's Park was reported three times as wide as normal, and spread out into the parking lot. Some basement walls were reported to have collapsed. Two hotels in Owatonna were evacuated. The Steele County emergency manager reported 274 homes and 8 businesses were damaged. Seven homes were considered destroyed. The cooperative observer in Owatonna measured 6.47 inches as of 0700 CST August 19. Some information provided by the Owatonna People's Press newspaper. |
| June 2006 | Flash Flood | Owatonna | $500,000 | Rainfall was reported to vary from 4.4 to 6.3 inches over a narrow area of Steele County. Significant localized flooding occurred, most of which was contained in the industrial park on the western edge of Owatonna. Several of the local factories had flooding in their parking lots. Railroad tracks washed out on North Street. The Microtel hotel, located in this area, had approximately 35 cars submerged in 3 to 4 feet of water. One hundred and eighty people were evacuated from 63 rooms of the hotel by Emergency Services. Some guests of the hotel reported they had water up to their knees in the lower level rooms. Owatonna fire chief Mike Johnson mentioned that 15 homes, mostly in the southeast section of Owatonna had flooding in their basements. Some of these residents reported water up to five feet deep. The over one half million dollar damage estimate included the damage at the hotel plus the flooded vehicles. Information provided by county officials. A large area of mud washed over Highway 14. Interstate 35 was closed at Owatonna. The Red Cross opened an emergency shelter at the Owatonna High School. Some information provided by Faribault Daily News newspaper. |
| June 2001 | Thunderstorm Wind | Owatonna | $10,000 | Roof partially torn off of two businesses. Sheds torn down along with numberous trees. |
| September 2010 | Thunderstorm Wind | Owatonna | $5,000 | Several trees and power lines were blown down in Owatonna, Minnesota. |
| May 1994 | Hail | Owatonna | $500 | A severe thunderstorm produced dime-size hail outside of Owatonna. Damaging thunderstorms winds broke several large tree limbs, destroyed numberous hay bales, and toppled mailboxes and posts. |
| April 2025 | Hail | Owatonna | - | Hail measurement provided via phone. |
| August 2025 | Flash Flood | Owatonna | - | The Emergency Manager reported that Hoffman Drive in Owatonna had emergency barricading in place due to water over the road Saturday night. The water had since receded by Sunday morning. |
| September 2024 | Hail | Owatonna | - | A picture on X showed 1 inch hail in Owatonna. |
| June 2024 | Flash Flood | Owatonna | - | Maple Creek overflowed and flooded roads in and around Mineral Springs Park. |
| May 2022 | Heavy Rain | Owatonna | - | Rainfall was measured at 1.7 inches. Some minor street flooding occurred in Owatonna. |
| June 2022 | Flash Flood | Owatonna | - | Very heavy rainfall occurred in a short period of time in the city of Owatonna. There were a few streets that had water covering the roadway and were impassable at one point. These roads included the intersection of Elm and Main Street, and Rose and Elm Street on the east side of town. |
| May 2021 | Funnel Cloud | Owatonna | - | Numerous videos, including some from trained spotters, showed a funnel cloud west of Owatonna. Toward the end, it became rope-like and then dissipated. None of the videos were close-up, and no debris cloud was ever noted, so ground contact contact could not be confirmed by video. Two surveys by local officials and the NWS revealed no damage anywhere. Therefore this has been recorded as a funnel cloud. Videos showed another funnel cloud close to this one, and a separate entry has been made for that funnel. |
| May 2021 | Funnel Cloud | Owatonna | - | Numerous videos, including some from trained spotters and a MNDOT traffic camera, showed a funnel cloud west of Owatonna. None of the videos were close-up, and no debris cloud was ever noted, so ground contact contact could not be confirmed by video. Two surveys by local officials and the NWS revealed no damage anywhere. Therefore this has been recorded as a funnel cloud. Videos showed another funnel cloud (that was rope-like) close to this one, and a separate entry has been made for that funnel. |
| June 2019 | Tornado (EF0) | Owatonna | - | The Steele County Sheriff filmed a brief landspout tornado over an open field. |
| July 2019 | Thunderstorm Wind | Owatonna | - | A tree was uprooted at the Owatonna country club. |
| August 2017 | Thunderstorm Wind | Owatonna | - | The local emergency manager reported several trees blown down around Owatonna. |
| September 2017 | Thunderstorm Wind | Owatonna | - | Several power poles were blown down in the city of Owatonna. |
| September 2017 | Thunderstorm Wind | Owatonna | - | Several trees, up to 24 inches in diameter, were uprooted at the Brooktree Golf Course in Owatonna. |
| July 2017 | Thunderstorm Wind | Owatonna | - | A tree was blown down in Owatonna. |
| July 2017 | Thunderstorm Wind | Owatonna | - | Several trees were blown down northeast of Owatonna. |
| June 2014 | Heavy Rain | Owatonna | - | A measured 12 hour rainfall total of 2.88 inches near Owatonna. |
| July 2013 | Heavy Rain | Owatonna | - | A measured rainfall amount of 2.92 inches fell in less than 3 hours. |
| June 2012 | Heavy Rain | Owatonna | - | A measured rainfall report of 4.18 inches occurred in less than 18 hours. |
| June 2012 | Heavy Rain | Owatonna | - | A measured rainfall report of 4.10 inches occurred in less than 18 hours. |
| June 2010 | Flash Flood | Owatonna | - | Significant street flooding was reported in the south side of Owatonna, Minnesota. |
| June 2009 | Funnel Cloud | Owatonna | - | Trained spotters had reported a rotating wall cloud and several funnel clouds on the southeast side of Owatonna and through the township of Havana. |
| July 2008 | Thunderstorm Wind | Owatonna | - | Large trees downed in Central Park. Minor street flooding also reported.|Port-o-potty blown 20 feet. Small to medium tree limbs on ground, with debris scattered across town. |
| July 2008 | Thunderstorm Wind | Owatonna | - | One six inch diameter tree toppled. Another 14 inch diameter tree downed. |
| July 2008 | Thunderstorm Wind | Owatonna | - | Measured at the airport. |
| August 2007 | Thunderstorm Wind | Owatonna | - | Measured by MNDOT sensor along Interstate 35. Numerous trees in the area were toppled. |
| September 2007 | Flash Flood | Owatonna | - | Three to five inches of rain fell over Owatonna, resulting in flooding of roads, homes and businesses. A city storm sewer also backed up, causing basements to flood in about 40 homes. This event ended October 1, 2007 at 0300 CST (see October 2007 Storm Data). Damage totals are listed in October 2007 Storm Data. |
| August 2007 | Hail | Owatonna | - | Reported near the Steele/Waseca county line. |
| July 2006 | Hail | Owatonna | - | Hail reported on the west side of Owatonna. |
| June 2006 | Thunderstorm Wind | Owatonna | - | Reported by the Owatonna police department. Damage was incurred to outside merchandise at a local Cabela's store. A tent pole was also snapped at this location. The store manager also reported a portable toilet was flung about 100 yards due to the strong winds. |
| June 2005 | Thunderstorm Wind | Owatonna | - | A wind gust of 66 MPH was recorded at the Owatonna Airport. A wind gust of 61 MPH was reported in town by emergency management. Trees and limbs were downed onto homes and vehicles across town. Five trees were downed and garbage cans and portable toilets were blown over in city parks. A large industrial sized garbage container was blown into the street behind the Fire Department. |
| August 2005 | Heavy Rain | Owatonna | - | Two feet of standing water was reported at several intersections in town after 2.5 inches of rain fell. Flooded roads included SE 18th Street, Allen Avenue, Elm Avenue, Broadway Street, and Highway 218. Overflowing sewers also caused manhole covers to be forced off near Hoffman Street and State Avenue. |
| September 2005 | Flash Flood | Owatonna | - | Two feet of water flowed across roads in town. Manhole covers were forced off by an overflow of draining storm water. Three inches of rain was recorded in Owatonna. |
| October 2004 | Thunderstorm Wind | Owatonna | - | Several trees were snapped and a light pole was pulled out of the ground at a homestead along 48th Street. |
| July 2003 | Thunderstorm Wind | Owatonna | - | Few trees down. |
| July 2002 | Thunderstorm Wind | Owatonna | - | Several trees and power lines down along Interstate 35. |
| August 2002 | Thunderstorm Wind | Owatonna | - | Several trees down. |
| June 1998 | Thunderstorm Wind | Owatonna | - | Roof ripped off mobile home. Estimated windspeed. |
| July 1997 | Thunderstorm Wind | Owatonna | - | Large trees blown down. |
| April 2026 | Hail | Owatonna | - | no account filed |
| April 2026 | Hail | Owatonna | - | no account filed |
| April 2022 | Hail | Owatonna | - | no account filed |
| June 2022 | Hail | Owatonna | - | no account filed |
| June 2022 | Hail | Owatonna | - | no account filed |
| April 2022 | Hail | Owatonna | - | no account filed |
| August 2018 | Hail | Owatonna | - | no account filed |
| September 2010 | Hail | Owatonna | - | no account filed |
| June 2009 | Hail | Owatonna | - | no account filed |
| June 2009 | Hail | Owatonna | - | no account filed |
| June 2007 | Hail | Owatonna | - | no account filed |
| June 2007 | Hail | Owatonna | - | no account filed |
| July 2006 | Hail | Owatonna | - | no account filed |
| May 2002 | Hail | Owatonna | - | no account filed |
| June 2002 | Hail | Owatonna | - | no account filed |