| July 1994 | Thunderstorm Wind | Sedan | $50,000 | Sixty to 80 mile an hour winds blew across the county with a line of thunderstorms. Power lines were down across the county. There was tree and house damage in Cedar Vale and Sedan. |
| July 2007 | Flash Flood | Sedan | $48,000 | Extremely heavy rainfall from the end of June into early July caused flash flooding throughout Chautauqua County. This resulted in roughly 48 thousand dollars in damage. |
| April 2004 | Flash Flood | Sedan | $25,000 | Highway 99 underwater. Unspecified number of towns without power. |
| April 2004 | Thunderstorm Wind | Sedan | $15,000 | Airport hangar roof damaged with door blown in. |
| March 2002 | Thunderstorm Wind | Sedan | $15,000 | Power lines downed. |
| September 2012 | Thunderstorm Wind | Sedan | $10,000 | Trees were blown down across town. Also some small porch damage occurred to houses. Winds were estimated at 50 to 60 mph. |
| July 2006 | Thunderstorm Wind | Sedan | $7,500 | Severe winds tore the roof off of a barn |
| May 2010 | Thunderstorm Wind | Sedan | $5,000 | Some tree limbs were knocked down. |
| April 2004 | Thunderstorm Wind | Sedan | $5,000 | Windows to unspecified number of buildings blown in on Main St. |
| May 1993 | Thunderstorm Wind | Sedan | $5,000 | no account filed |
| May 2011 | Thunderstorm Wind | Sedan | $1,000 | An 18-inch diameter tree was downed. |
| July 2019 | Flash Flood | Sedan | $100 | County dispatch reported a few flooded roads in Sedan. |
| July 2010 | Flash Flood | Sedan | $100 | Water was reported over numerous roads mainly to the east of Sedan. County Road 32 north of highway 166 was barricaded due to high water. |
| July 1994 | Thunderstorm Wind | Sedan | $50 | no account filed |
| July 2025 | Thunderstorm Wind | Sedan | - | There were trees down of unknown size. |
| March 2024 | Hail | Sedan | - | Public report of nickel sized hail in Cedar Vale. |
| May 2024 | Hail | Sedan | - | Quarter to golf ball sized hail was reported. |
| April 2024 | Thunderstorm Wind | Sedan | - | Report from a trained spotter of winds up to 70 mph. Tree limbs and a couple trees were knocked down as well. |
| April 2024 | Tornado (EF0) | Sedan | - | Brief tornado touchdown reported via Facebook with damage pictures to tree sent in. A couple of hardwood trees were snapped but had compromised trunks. Nearby cedar trees had broken branches, and trunks snapped. |
| June 2023 | Hail | Sedan | - | Dime sized hail covered the ground, but a few of the hail stones were half dollar sized. |
| June 2023 | Heavy Rain | Sedan | - | Twenty four hour total of a Kansas Mesonet site of 2.10 inches. |
| August 2023 | Thunderstorm Wind | Sedan | - | COOP observer reported estimated wind gust of 60 mph. |
| May 2022 | Heavy Rain | Sedan | - | A Coop observer in Sedan, Kansas, reported a 24 hour rainfall total of 3.78 inches. |
| March 2021 | Heavy Rain | Sedan | - | This is a 72 hour rainfall total. |
| May 2019 | Thunderstorm Wind | Sedan | - | Relayed by a trained spotter. |
| June 2018 | Thunderstorm Wind | Sedan | - | No damage was reported. |
| May 2017 | Thunderstorm Wind | Sedan | - | A 6 to 8 inch diameter tree branch was blown down. |
| April 2017 | Thunderstorm Wind | Sedan | - | Winds were estimated at 70 mph with pea size hail covering the ground. |
| September 2017 | Thunderstorm Wind | Sedan | - | Widespread tree limbs some up to 8 inches in diameter were blown down across town. |Once utility pole was leaning over and several chain link fences were damaged by the falling tree limbs. Some windows were blown out of the businesses downtown. |
| April 2015 | Thunderstorm Wind | Sedan | - | A coop observer estimated 75 to 80 mph winds. |
| April 2015 | Thunderstorm Wind | Sedan | - | A coop observer reported wind gusts of 75 to 80 mph. |
| October 2014 | Heavy Rain | Sedan | - | Measured rainfall of 2.90 inches. |
| October 2014 | Heavy Rain | Sedan | - | The 24 hour rainfall amount was 5.30 inches. |
| June 2013 | Heavy Rain | Sedan | - | Very heavy rains were reported by Amateur radio. |
| May 2013 | Flood | Sedan | - | Numerous low water crossings were being inundated by water. |
| May 2013 | Thunderstorm Wind | Sedan | - | A 3-foot diameter tree was uprooted. |
| May 2013 | Flood | Sedan | - | Minor street flooding was reported. |
| May 2013 | Thunderstorm Wind | Sedan | - | Multiple full-sized trees were reported down in Sedan and blocking roads. Size estimates were unknown. Estimated time based on radar. |
| June 2012 | Thunderstorm Wind | Sedan | - | Wind speed was estimated by a law enforcement official. |
| May 2012 | Flood | Sedan | - | Water covered Sedan's Main Street to a depth of one foot. Unfortunately, property and/or crop damage estimates are unknown. |
| June 2011 | Thunderstorm Wind | Sedan | - | Winds were estimated around 60 mph. |
| February 2011 | Hail | Sedan | - | Was reported on the west side of town. |
| April 2011 | Hail | Sedan | - | In twenty minutes 0.91 inches of rain fell as well. |
| June 2010 | Heavy Rain | Sedan | - | Rainfall since midnight was 2.20 inches. |
| April 2010 | Thunderstorm Wind | Sedan | - | The 60 mph winds were accompanied by one inch hail. |
| April 2010 | Hail | Sedan | - | Fifty three mph winds were also measured as well. |
| March 2009 | Hail | Sedan | - | The hail covered the ground. |
| May 2009 | Heavy Rain | Sedan | - | Rainfall of 1.04 inches fell in less than 30 minutes. |
| October 2009 | Heavy Rain | Sedan | - | Rainfall totals were 3.73 inches near Sedan. |
| March 2008 | Thunderstorm Wind | Sedan | - | A few gusts reached 60 mph. |
| May 2008 | Hail | Sedan | - | Quarter to golfball sized hail was reported by KAKE-TV storm chaser. |
| June 2007 | Flash Flood | Sedan | - | Widespread 9 to 11 inch rainfall amounts occurred across Chautauqua County from June 27th through July 1st, producing widespread, significant flooding. Please refer to this event in the July 2007 StormData publication for complete details. |
| June 2005 | Flash Flood | Sedan | - | Water was reported over the roadway. |
| September 2005 | Thunderstorm Wind | Sedan | - | Unspecified damage. |
| September 2005 | Thunderstorm Wind | Sedan | - | Unspecified damage. |
| April 2003 | Tornado (F0) | Sedan | - | Brief event in the country. |
| April 2003 | Thunderstorm Wind | Sedan | - | Top quarter of 20 foot Bradford tree either toppled or sheared over. |
| May 2002 | Flash Flood | Sedan | - | Many roads flooded. In Sedan, depths approached 3 feet. |
| June 2001 | Thunderstorm Wind | Sedan | - | Major tree damage. |
| July 1999 | Flash Flood | Sedan | - | Torrential rains caused widespread flooding, especially in and around Cedar Vale where the flooding reached some homes, the hospital, and nursing home. The flooding was reported by both law enforcement officials and co-operative observers. |