| July 2006 | Flood | Upper Sandusky | 1 killed | Heavy rains on July 12th through the 14th caused Tymochtee Creek to go into flood in western Wyandot County. State Route 53 was flooded by up to 6 feet of water approximately four miles west of Upper Sandusky near the intersection of Township Road 103. A 46 male apparently drove his truck into the flood waters around 2 am on July 14th. The man was later found deceased about 200 feet north of the highway. His truck was found completely submerged in the flood waters. |
| August 2011 | Hail | Upper Sandusky | $500,000 | Thunderstorms produced a swath of large hail across the Upper Sandusky area. Some of the hail was as large as baseballs. Hundreds of vehicles and dozens of homes were damaged by this hail. |
| May 2011 | Hail | Upper Sandusky | $150,000 | Golf ball sized hail was reported in Upper Sandusky. Many vehicles and a few homes sustained damage from the hail. |
| April 2013 | Thunderstorm Wind | Upper Sandusky | $100,000 | Dispatch reported that four semi trucks were blown over along with numerous power lines and trees down across Upper Sandusky. |
| June 2006 | Thunderstorm Wind | Upper Sandusky | $100,000 | Severe thunderstorms moved across Wyandot County during the afternoon hours of June 22nd and produced wind gusts estimated to be around 70 mph. Many trees and large limbs were downed across the county. Utility poles and lines were also reported down at several locations. Many reports came from the Upper Sandusky area where several buildings sustained roof and siding damage. Three semi trucks were blown over on U.S. 23 in Upper Sandusky. |
| May 2008 | Thunderstorm Wind | Upper Sandusky | $75,000 | Thunderstorm downburst winds damaged a farm nine miles west of Upper Sandusky. Two barn buildings were heavily damaged. A house nearby sustained roof damage. A large tree on the property was also toppled. |
| November 1998 | Thunderstorm Wind | Upper Sandusky | $40,000 | Trees and power lines were downed and roofs were damaged. |
| March 2026 | Thunderstorm Wind | Upper Sandusky | $35,000 | Barn destroyed along County Road 110 on the northwest side of Upper Sandusky. Damage was related to a line of thunderstorms. |
| June 2008 | Thunderstorm Wind | Upper Sandusky | $30,000 | Several trees were reported down, one of which fell onto a house. |
| May 2001 | Thunderstorm Wind | Upper Sandusky | $30,000 | Thunderstorm winds downed two trees and several large tree limbs. One of the trees landed on a house and caused minor structural damage. Fallen tree limbs also damaged two cars. |
| November 2013 | Thunderstorm Wind | Upper Sandusky | $25,000 | Thunderstorm winds downed some utility poles causing power outages. |
| July 2013 | Thunderstorm Wind | Upper Sandusky | $25,000 | Thunderstorm winds downed many trees across the county. |
| April 2011 | Thunderstorm Wind | Upper Sandusky | $20,000 | Thunderstorm winds damaged a barn and tore part of a roof off of a house. |
| May 2004 | Thunderstorm Wind | Upper Sandusky | $20,000 | Thunderstorm winds tore the roof off of a barn approximately three miles east of Upper Sandusky. A couple trees were also downed. |
| April 2023 | Thunderstorm Wind | Upper Sandusky | $16,000 | Numerous trees downed, one house sustained damage, and a barn had its roof blown off in Upper Sandusky. Most of Upper Sandusky lost power. |
| June 2015 | Thunderstorm Wind | Upper Sandusky | $15,000 | Thunderstorm winds snapped two utility poles. |
| February 2008 | Flash Flood | Upper Sandusky | $15,000 | Heavy rain fell causing several feet of water to cover roadways throughout the area. State Route 53 west of Upper Sandusky was reported as being washed out during the early morning hours of the 6th. |
| August 2007 | Thunderstorm Wind | Upper Sandusky | $15,000 | Thunderstorm winds downed several trees. |
| July 1999 | Thunderstorm Wind | Upper Sandusky | $15,000 | Two cars were damaged by falling trees. |
| May 2011 | Hail | Upper Sandusky | $10,000 | Quarter size hail was reported with this thunderstorm. |
| June 2004 | Thunderstorm Wind | Upper Sandusky | $10,000 | Thunderstorm winds downed a few trees and large limbs near Upper Sandusky. |
| August 2003 | Thunderstorm Wind | Upper Sandusky | $10,000 | Thunderstorm winds downed a few trees. |
| June 1996 | Flash Flood | Upper Sandusky | $10,000 | no account filed |
| August 2011 | Thunderstorm Wind | Upper Sandusky | $6,000 | Thunderstorm winds downed several large tree limbs. |
| June 2004 | Thunderstorm Wind | Upper Sandusky | $6,000 | Thunderstorm winds downed one tree and several large limbs. |
| May 2017 | Thunderstorm Wind | Upper Sandusky | $5,000 | Thunderstorm winds downed at least 4 trees in the Upper Sandusky area. |
| April 2006 | Thunderstorm Wind | Upper Sandusky | $5,000 | Thunderstorms damaged a barn three miles southwest of Upper Sandusky. |
| August 2002 | Thunderstorm Wind | Upper Sandusky | $5,000 | Thunderstorm winds downed two trees. |
| August 2000 | Thunderstorm Wind | Upper Sandusky | $5,000 | Thunderstorm winds downed a few trees. |
| July 2000 | Thunderstorm Wind | Upper Sandusky | $5,000 | Thunderstorm winds downed several trees in Upper Sandusky. |
| August 1993 | Hail | Upper Sandusky | $5,000 | no account filed |
| June 2004 | Thunderstorm Wind | Upper Sandusky | $3,000 | Thunderstorm winds downed one tree and one large limb. |
| June 1998 | Thunderstorm Wind | Upper Sandusky | $3,000 | Trees were downed. |
| December 1998 | Thunderstorm Wind | Upper Sandusky | $3,000 | Large limbs and at least one tree were downed north of Upper Sandusky. |
| June 2008 | Thunderstorm Wind | Upper Sandusky | $2,000 | Thunderstorm winds downed several large tree limbs. |
| August 2007 | Thunderstorm Wind | Upper Sandusky | $2,000 | Several trees were reported down. |
| May 2005 | Thunderstorm Wind | Upper Sandusky | $2,000 | An 18 inch diameter tree was reported down just north of Upper Sandusky. In Sycamore, there were several reports of trees down. |
| July 1997 | Thunderstorm Wind | Upper Sandusky | $2,000 | no account filed |
| May 2018 | Thunderstorm Wind | Upper Sandusky | $1,000 | Thunderstorm winds downed a couple trees in the Upper Sandusky area. |
| June 2010 | Thunderstorm Wind | Upper Sandusky | $1,000 | Thunderstorm winds downed a large tree limb. |
| June 2007 | Thunderstorm Wind | Upper Sandusky | $1,000 | Two large trees were reported down. |
| March 2026 | Thunderstorm Wind | Upper Sandusky | - | Large tree limbs downed in Upper Sandusky. Damage was related to a line of thunderstorms. |
| August 2024 | Thunderstorm Wind | Upper Sandusky | - | Tree limbs downed in Upper Sandusky. |
| May 2022 | Thunderstorm Wind | Upper Sandusky | - | Multiple 8-inch to 12-inch diameter trees downed in Upper Sandusky. |
| November 2020 | Thunderstorm Wind | Upper Sandusky | - | Multiple trees and power lines down across Wyandot County, including Upper Sandusky. |
| March 2012 | Hail | Upper Sandusky | - | Penny sized hail was observed. |
| May 2012 | Hail | Upper Sandusky | - | Penny sized hail was reported. |
| July 2012 | Hail | Upper Sandusky | - | Nickel sized hail was observed. |
| May 2010 | Hail | Upper Sandusky | - | Penny sized hail was observed. |
| April 2009 | Hail | Upper Sandusky | - | Nickel size hail was observed. |
| April 2006 | Hail | Upper Sandusky | - | Penny size hail was observed east of Upper Sandusky. |
| June 2006 | Hail | Upper Sandusky | - | Nickel size hail was observed. |
| May 2006 | Hail | Upper Sandusky | - | Penny size hail was observed. |
| April 2005 | Hail | Upper Sandusky | - | Penny size hail was observed. |
| September 2005 | Thunderstorm Wind | Upper Sandusky | - | A few large limbs were reported down. |
| May 2004 | Hail | Upper Sandusky | - | Penny size hail was observed. |
| September 1999 | Funnel Cloud | Upper Sandusky | - | Law enforcement officials spotted a funnel cloud two miles northwest of Upper Sandusky moving southeast at approximately 15 mph. The funnel persisted for several minutes but did not ever come in contact with the ground. |
| May 1998 | Flash Flood | Upper Sandusky | - | Heavy thunderstorm rain caused flooding on State Route 182 and County Roads 56 and 124. |
| June 1998 | Hail | Upper Sandusky | - | no account filed |
| May 1997 | Hail | Upper Sandusky | - | no account filed |