| February 2011 | Flash Flood | Norwalk | 1 killed | A motorist on South Norwalk Road entered flooded waters of a tributary of the Huron River, Cole Creek, in the town of Norwalk. The car was washed into the creek where the driver was killed. Witness report water depths of 2 to 3 feet over the bridge at time of incident. |
| July 2000 | Flash Flood | Norwalk | $500,000 | Thunderstorms dumped torrential rain on Norwalk during the late afternoon and early evening hours. 4.87 inches of rain was measured in Norwalk with 3 inches of that total falling in a 20 minute period around 530 pm. All streets in downtown Norwalk had to be closed because of water up to three feet deep. A car was washed off of a road in Lemar Lake Park. The vehicle became submerged in 5 feet of water. The driver of the car was rescued by fire fighters. Several roads in Norwalk were washed out. Many cars and homes sustained flooding damage. |
| November 2013 | Thunderstorm Wind | Norwalk | $250,000 | Thunderstorms wind gusts in excess of 60 mph caused considerable damage in Norwalk. Dozens of trees were downed and at least one home sustained structural damage. Over half of the city lost power from the storm. |
| June 2012 | Thunderstorm Wind | Norwalk | $250,000 | Thunderstorm winds estimated at 60 to 70 mph caused extensive damage in Norwalk. Dozens of trees were downed in the city. Several homes sustained damage, mainly from fallen trees and limbs. A few utility poles were snapped caused scattered power outages. |
| July 2012 | Thunderstorm Wind | Norwalk | $125,000 | Thunderstorm downburst winds estimated to be at least 60 mph downed many trees and limbs in Norwalk. A vehicle accident on Washington Street was caused by one of the fallen trees. The driver was transported to a local hospital. Scattered power outages were reported in the city. |
| July 2003 | Thunderstorm Wind | Norwalk | $125,000 | Thunderstorm winds downed dozens of trees and large limbs in and around Norwalk. At least four homes were damaged by trees. |
| January 2008 | Thunderstorm Wind | Norwalk | $100,000 | A report was received from the Emergency Manager of wind damage to sevral homes in a neighborhood from this event. A survey was conducted and it was noted that several homes in the area lost shingles. One house that had nearly half the shingles blown off actually damaged the house next to it. The severe winds were strong enough to cause the shingles to break through the vinyl siding and plywood exterior of the neighboring house. Shingles were actually found in the attic of the neighboring home. Law enforcement reports from that evening also indicate that several trees were down across the City of Norwalk. |
| June 1997 | Lightning | Norwalk | $100,000 | no account filed |
| July 2013 | Flash Flood | Norwalk | $75,000 | The Norwalk Creek exceeded its banks as it was overwhelmed by runoff from torrential rain. The creek rose quickly and thretened a few homes and businesses which were inundated to their first level. A woman was rescued from her vehicle as the flowing creek overran Lover's Lane Road. |
| July 2000 | Thunderstorm Wind | Norwalk | $75,000 | Thunderstorm winds toppled two large cinder block walls at a school construction site. |
| September 1994 | Tornado (F1) | Norwalk | $50,000 | A small tornado touched down for a short time in an wooded area and flattened a number of trees. |
| August 1994 | Thunderstorm Wind | Norwalk | $50,000 | no account filed |
| August 2011 | Thunderstorm Wind | Norwalk | $45,000 | Thunderstorm winds downed many large trees in Norwalk. At least one home was damaged by a fallen tree. |
| October 2012 | Flood | Norwalk | $40,000 | The Norwalk Reservoir located in Norwalk covers 8.6 square mile drainage area into the Norwalk Creek. The reservoir does not control outflow but does have a spillway on the west side when the reservoir is overtopped. Early Tuesday morning the reservoir filled and the water coming out of the spillway caused the Norwalk Creek to flood. One home on Elm Street flooded though several more were evacuated. Five businesses on Water Street were flooded with as much as 2 feet of water. Once driver was rescued after he drove his car into Water Street. Other local roads in Norwalk were flooded with no property damage. |
| August 1997 | Thunderstorm Wind | Norwalk | $30,000 | A tree was downed on a house. |
| June 2008 | Thunderstorm Wind | Norwalk | $25,000 | Several large trees and numerous utility poles were reported down. |
| July 1999 | Thunderstorm Wind | Norwalk | $25,000 | A 59 mph wind gust was measured in Norwalk and several large trees were downed. A roof of a house and a car were damaged by falling trees. Several trees were also reported down in Willard and Bellevue. |
| August 2019 | Thunderstorm Wind | Norwalk | $20,000 | A tree fell on a sheriff vehicle. |
| May 2014 | Thunderstorm Wind | Norwalk | $15,000 | A three foot diameter tree was uprooted and another tree fell on a house in Norwalk. |
| May 2013 | Thunderstorm Wind | Norwalk | $15,000 | Several large trees were snapped or uprooted. |
| July 2013 | Thunderstorm Wind | Norwalk | $15,000 | Thunderstorm winds downed several trees. |
| July 2011 | Thunderstorm Wind | Norwalk | $15,000 | Thunderstorm winds downed several trees and large limbs. |
| June 1995 | Thunderstorm Wind | Norwalk | $12,000 | Large limbs were downed, at least one damaging a house. |
| November 2013 | Thunderstorm Wind | Norwalk | $10,000 | The Sheriff reported several trees down brought down by thunderstorm winds in Norwalk. |
| May 2007 | Hail | Norwalk | $10,000 | Quarter size hail was observed. |
| June 2005 | Thunderstorm Wind | Norwalk | $10,000 | A trained spotter estimated winds at 60 mph, with several trees and powers lines down. |
| April 2003 | Thunderstorm Wind | Norwalk | $10,000 | Thunderstorm winds downed several trees around Norwalk. |
| July 2003 | Thunderstorm Wind | Norwalk | $10,000 | Thunderstorm winds downed several trees and many large limbs. |
| July 2003 | Thunderstorm Wind | Norwalk | $10,000 | Thunderstorm winds downed trees south of Norwalk and near Wakeman. |
| June 2009 | Thunderstorm Wind | Norwalk | $8,000 | Several trees and many large limbs were reported down. |
| May 2011 | Hail | Norwalk | $5,000 | Thunderstorms produced quarter sized hail. |
| August 2010 | Thunderstorm Wind | Norwalk | $5,000 | Thunderstorm winds downed two trees. |
| May 2008 | Thunderstorm Wind | Norwalk | $5,000 | A few large limbs and power lines were reported down. |
| June 2008 | Thunderstorm Wind | Norwalk | $5,000 | Thunderstorm winds downed several large tree limbs. |
| November 2003 | Thunderstorm Wind | Norwalk | $5,000 | Thunderstorm winds downed several road signs south of Norwalk. |
| June 2000 | Thunderstorm Wind | Norwalk | $5,000 | Thunderstorm winds downed several trees just east of Norwalk. |
| June 1999 | Thunderstorm Wind | Norwalk | $5,000 | Large trees downed. |
| May 2006 | Thunderstorm Wind | Norwalk | $4,000 | Several trees were reported down, along with power lines. |
| December 2014 | Thunderstorm Wind | Norwalk | $3,000 | A line of showers and thunderstorms downed a couple of trees as it moved through the Norwalk area. |
| July 2014 | Thunderstorm Wind | Norwalk | $3,000 | The public reported a couple small trees down on a golf course in Norwalk. |
| July 2012 | Thunderstorm Wind | Norwalk | $3,000 | Thunderstorm winds downed two trees in Norwalk and a large limb in Wakeman. |
| August 2007 | Thunderstorm Wind | Norwalk | $3,000 | A tree and large limb was reported down. |
| August 2019 | Thunderstorm Wind | Norwalk | $2,000 | A tree was blown down on a power line. A utility pole was snapped. |
| June 2013 | Thunderstorm Wind | Norwalk | $2,000 | Thunderstorms winds downed a couple of trees. |
| July 2008 | Thunderstorm Wind | Norwalk | $2,000 | Thunderstorm winds downed several large tree limbs. |
| November 2005 | Thunderstorm Wind | Norwalk | $2,000 | Several large limbs were reported down. |
| July 2002 | Thunderstorm Wind | Norwalk | $2,000 | Thunderstorm winds downed one tree and a large limb east of Norwalk. |
| July 1997 | Thunderstorm Wind | Norwalk | $2,000 | no account filed |
| May 1997 | Thunderstorm Wind | Norwalk | $2,000 | no account filed |
| August 2011 | Thunderstorm Wind | Norwalk | $1,000 | Thunderstorm winds estimated at 60 mph downed a couple large tree limbs. |
| May 2011 | Hail | Norwalk | $1,000 | Thunderstorms produced penny to nickel sized hail. |
| May 2010 | Thunderstorm Wind | Norwalk | $1,000 | Thunderstorm winds downed a large tree. |
| June 2006 | Thunderstorm Wind | Norwalk | $1,000 | A few large limbs were reported down. |
| April 1998 | Thunderstorm Wind | Norwalk | $1,000 | Four trees were downed. |
| May 2025 | Hail | Norwalk | - | Hail up to penny-size on the southwest side of Norwalk. |
| May 2025 | Hail | Norwalk | - | Hail up to quarter-size on the south side of Norwalk. |
| August 2024 | Thunderstorm Wind | Norwalk | - | Two trees downed in Norwalk. |
| May 2024 | Thunderstorm Wind | Norwalk | - | Large tree limbs downed along western side of Norwalk. |
| August 2023 | Flash Flood | Norwalk | - | Widespread road closures due to flooding across Norwalk, Wakeman, and Townsend Township. This includes Wakeman Towline Road at Chappel Creek, Greenwich Milan Townline Road North near Union Road, Lehigh Road south of US-20, and Elm and Water Streets in Norwalk. Radar estimated 2.5 to 4.75 inches of rainfall across this area in a three hour period ending 100 AM EDT August 24, 2023. |
| June 2023 | Flash Flood | Norwalk | - | Multiple road closures reported across the southern portion of Norwalk, including Christie Avenue, Shady Lane Drive, Water Street, and Benedict Avenue. Sewer backups reported in Norwood Avenue. Radar estimated 2 to 2.5 inches of rain fell in one hour. |