| July 2010 | Hail | Napoleon | $1,500,000 | The large hail damaged many area homes, campers, and vehicles. Damage to crops was limited as despite the large size of the hail, the aerial coverage of hail was spotty according to insurance adjusters. |
| May 2010 | Thunderstorm Wind | Napoleon | $500,000 | There was significant damage to farms from about six miles west of Napoleon to about two miles northwest of Napoleon. Damage was done to pole barns and other outbuildings. Six power poles were snapped and one cow was killed in the area west of Napoleon. There was also crop damage. |
| July 2011 | Tornado (EF2) | Napoleon | $450,000 | A National Weather Service storm survey confirmed that an EF2 tornado on the Enhanced Fujita Scale touched down around seven miles south southwest of Napoleon, then moved east southeast before lifting four miles east of Burnstad. No fewer than three farmsteads were damaged along the path of the tornado. The worst damage occurred seven miles south southwest of Napoleon, where the tornado picked up and threw an 18 thousand bushel grain bin 250 yards, and also destroyed 1,800 feet of shelter belt trees near 100 feet tall. East southeast of this farmstead, the tornado lifted and rolled a ten ton grain bin three quarters of one mile to another farmstead, where it impacted and damaged a barn. The damage corresponded to EF2 on the Enhanced Fujita Scale. From that it was determined that wind speeds with this tornado were around 120 miles per hour. |
| August 2014 | Flash Flood | Napoleon | $250,000 | Many homes had significant amounts of water in their basements from runoff. Some basements collapsed. Rain amounts were up to six inches. Crops were flooded. |
| August 2007 | Hail | Napoleon | $250,000 | Multiple reports from various sources of large hail over north central and northeast Logan County, including in the city of Napoleon. Most of the hail was 1.50 to 2.50 inches in diameter. The largest stones were 3.50 inches diameter from 4 miles northeast of Napoleon to 8 miles northeast of Napoleon, and in the area 17 miles east of Napoleon. The swath of hail damage to crops was a few miles wide in spots. Reports came from law enforcement, newspapers, emergency management, weather spotters, and the public. The same supercell storm produced two tornadoes in Logan County on August 26. |
| July 2024 | Thunderstorm Wind | Napoleon | $200,000 | Four campers were rolled over at McKenna Lake. |
| June 1999 | Thunderstorm Wind | Napoleon | $200,000 | no account filed |
| August 2006 | Hail | Napoleon | $150,000 | Hail swath 2 miles wide from 2 miles SW Napoleon to 10 miles E Napoleon. Hail was piled a foot deep in places. Major damage to windows and roofs. Hail was being reported in real time by trained spotters. Hail path and swath was determined from newspaper articles. Crop damage included 250 acres of corn. |
| March 2009 | Flood | Napoleon | $121,000 | Overland flooding damaged state, county and township roads. Four homes were flooded. Flooding continued into April. |
| August 2007 | Hail | Napoleon | $60,000 | Windows were broken on cars and there was other property damage. |
| July 2011 | Thunderstorm Wind | Napoleon | $50,000 | Strong thunderstorm winds damaged several empty grain bins. |
| April 2009 | Flood | Napoleon | $50,000 | Heavy runoff from snowmelt resulted in additional overland flooding which further damaged several county and local roads. |
| June 2001 | Thunderstorm Wind | Napoleon | $45,000 | Damage to pole barns and farm house caused approxiately 45 thousand dollars . |
| July 2010 | Hail | Napoleon | $45,000 | no account filed |
| July 2018 | Lightning | Napoleon | $30,000 | Lightning struck a house and started a fire. |
| October 1997 | Thunderstorm Wind | Napoleon | $30,000 | Strong thunderstorm winds continued into Logan county. Pole barns were toppled along damage path, as well as a few out buildings. Roofs also partially ripped off of a few barns. A few of the buildings just finished receiving repairs from the July 1st storm. |
| June 2011 | Thunderstorm Wind | Napoleon | $20,000 | Very strong thunderstorm winds resulted in a cattle trailer being blown over in Napoleon. |
| August 1997 | Thunderstorm Wind | Napoleon | $10,000 | thunderstorm winds blew down a chain link fence around the school. Also numerous trees fell in town with some falling across houses or automobiles. |
| June 2016 | Hail | Napoleon | $10,000 | no account filed |
| June 2013 | Flash Flood | Napoleon | $9,000 | Deep water and debris was flowing fast over Highway 34 west of Napoleon in Logan County. Rain reports of up to three inches were received from adjacent areas of Emmons County. |
| July 2020 | Thunderstorm Wind | Napoleon | $5,000 | Tree branches to three inches in diameter were broken. |
| July 2017 | Thunderstorm Wind | Napoleon | $2,000 | Tree branches were broken down. |
| July 2021 | Hail | Napoleon | - | The hail caused some crop damage. |
| June 2013 | Heavy Rain | Napoleon | - | Heavy rain of two inches fell in one hour. |
| July 2011 | Tornado (EF0) | Napoleon | - | A brief tornado touchdown occurred near Napoleon. No structures were impacted, and no damage was reported with this tornado. |
| June 2010 | Thunderstorm Wind | Napoleon | - | Very heavy rain and small hail accompanied the strong thunderstorm winds. |
| August 2007 | Tornado (EF0) | Napoleon | - | Public reported tornado touched down four times along this path. Tornado lifted to a funnel cloud and then touched down repeatedly. NWS storm damage survey also indicated this as the evidence was sporadic along the path, indicating the tornado was not on the ground the entire time / length. No structures impacted. Damage to crops. See the second tornado entry for Logan County August 26 for the same supercell storm. Also see the large hail entry, again from the same supercell. |
| August 2007 | Tornado (EF0) | Napoleon | - | Damage to trees and hay and straw bales. Bales were blown a few hundred feet. NWS storm damage survey completed. No structures impacted. See the first tornado entry for Logan County August 26 for the same supercell storm. Also see the large hail entry, again from the same supercell. |
| August 2006 | Lightning | Napoleon | - | Lightning struck a tree, traveled into the ground, and blew a 2 1/2 foot wide hole in the ground near the trunk. |
| June 2005 | Hail | Napoleon | - | ARB observer reports penny size hail. |
| June 2005 | Thunderstorm Wind | Napoleon | - | Reported by a NWS cooperative observer. |
| July 2003 | Thunderstorm Wind | Napoleon | - | Wind damage to nearly all farmsteads between Napoleon and Fredonia with one family home destroyed. Power outage occurred for several hours in the city of Napoleon along with numerous trees uprooted and one home receiving major roof damage. On the outskirts of Napoleon 30-4 thousand pound each thresher machines tipped on their sides. A 75,000 and two 25,000 bushel grain bins destroyed along with a well/drilling and repair shop destroyed in the city of Fredonia. |
| June 2001 | Hail | Napoleon | - | Duration of the hail was 25 minutes. |
| June 2001 | Thunderstorm Wind | Napoleon | - | Cooperative observer reported roof blown off a business and mature tree's uprooted. |
| August 1999 | Tornado (F1) | Napoleon | - | Tornado touch down in open field. |
| June 1998 | Tornado (F0) | Napoleon | - | Tornado remained in rural areas and caused no damage. Ground was white with pea size hail after storm lifted. |
| July 1995 | Thunderstorm Wind | Napoleon | - | Numerous tree branches and power lines knocked down |
| July 2022 | Hail | Napoleon | - | no account filed |
| July 2022 | Hail | Napoleon | - | no account filed |
| September 2022 | Hail | Napoleon | - | no account filed |
| August 2020 | Hail | Napoleon | - | no account filed |
| August 2020 | Hail | Napoleon | - | no account filed |
| August 2020 | Hail | Napoleon | - | no account filed |
| August 2020 | Hail | Napoleon | - | no account filed |
| May 2019 | Hail | Napoleon | - | no account filed |
| July 2018 | Hail | Napoleon | - | no account filed |
| August 2018 | Hail | Napoleon | - | no account filed |
| June 2017 | Hail | Napoleon | - | no account filed |
| July 2016 | Hail | Napoleon | - | no account filed |
| July 2016 | Hail | Napoleon | - | no account filed |
| July 2016 | Funnel Cloud | Napoleon | - | no account filed |
| June 2013 | Hail | Napoleon | - | no account filed |
| May 2012 | Hail | Napoleon | - | no account filed |
| May 2012 | Hail | Napoleon | - | no account filed |
| May 2012 | Hail | Napoleon | - | no account filed |
| July 2011 | Hail | Napoleon | - | no account filed |
| August 2007 | Hail | Napoleon | - | no account filed |
| May 2006 | Hail | Napoleon | - | no account filed |
| June 2006 | Hail | Napoleon | - | no account filed |
| June 2006 | Hail | Napoleon | - | no account filed |