| August 2010 | Lightning | Morrison | 1 hurt | A 12 year old boy was struck by lightning at Southside Elementary School in Morrison, IL just before 2 pm CDT August 20. |
| August 2014 | Thunderstorm Wind | Morrison | $250,000 | Wind gusts estimated to be 75 mph blew down numerous trees across all of Morrison, IL around 220 pm CDT August 25. There was widespread tree damage across town with some trees on power lines and residences. |
| June 2009 | Thunderstorm Wind | Morrison | $25,000 | Wind gusts estimated to be 70 mph blew some trees and power lines down in Morrison, IL around 610 pm June 19. |
| March 2006 | Thunderstorm Wind | Morrison | $25,000 | 15 power poles snapped at ground level on Frog Pond Road between Garden Plain and Hazel Roads. |
| July 2003 | Hail | Morrison | $20,000 | no account filed |
| August 2014 | Thunderstorm Wind | Morrison | $15,000 | Wind gusts estimated to be 75 mph blew down several trees on the spotter's block in Morrison, IL around 220 pm CDT August 25. A two foot diameter tree fell on a garage and another nearby tree was snapped off. |
| June 2008 | Thunderstorm Wind | Morrison | $10,000 | Wind gusts estimated to be 60 mph blew down some tree branches throughout the town of Morrison, IL around 4:45 am June 6. The branches fell onto some power lines breaking them causing a power outage. |
| July 2006 | Thunderstorm Wind | Morrison | $5,000 | Also from co-op observer. Trees and power lines down. Many of the limbs were 6 inches in diameter with some greater than 10 inches in diameter. |
| August 1993 | Hail | Morrison | $5,000 | Rapid developing thunderstorms produced golf-ball size hail, twice, at Morrison, Illinois. Both severe thunderstorms were about half an hour apart and moved northeast at 35 mph. The second storm arrived with a stronger punch of wind with measured wind gusts recorded at 68 mph. Numerous tree limbs were blown down. No dollar amounts were reported, but crop damage had to be significant considering the time of year. |
| August 2000 | Thunderstorm Wind | Morrison | $5,000 | no account filed |
| March 2006 | Hail | Morrison | $3,000 | no account filed |
| September 2000 | Thunderstorm Wind | Morrison | $2,000 | Trees down. |
| August 1995 | Thunderstorm Wind | Morrison | $2,000 | no account filed |
| June 2024 | Thunderstorm Wind | Morrison | - | Powerlines downed by thunderstorm winds. |
| April 2023 | Tornado (EF1) | Morrison | - | An isolated tornado began just east of Morrison IL around 2:56 PM CST. The tornado damaged a power pole and a tree at this location. The tornado then caused sporadic damage until it approached Fulfs Road. It strengthened at this location and caused damage to trees, farm outbuildings, and a power pole. The tornado ended shortly after this location. Wind speeds are estimated in the 105-110 MPH range, with a rating of EF1. At it's widest, the tornado was 300 yards and was likely a multi-vortex tornado. The tornado path length was nearly 6 miles. |
| August 2021 | Thunderstorm Wind | Morrison | - | A large tree branch blown down, approximately 15 to 18 inches in diameter. |
| November 2020 | Thunderstorm Wind | Morrison | - | Tree branch blown down on a roof, with possible funnel cloud spotted. |
| November 2020 | Thunderstorm Wind | Morrison | - | Multiple power poles down on the east side of town. |
| November 2020 | Thunderstorm Wind | Morrison | - | Ten to twelve power poles snapped on Hazel Road, west of Lyndon Road. This is a general location and the time is estimated from radar. |
| May 2020 | Thunderstorm Wind | Morrison | - | A large tree was topped off by high winds. |
| November 2020 | Thunderstorm Wind | Morrison | - | Barn destroyed and blown into a field. The damage occurred on Lyndon Road, north of Hazel Road. This is the general location, with time estimated by radar. |
| May 2018 | Hail | Morrison | - | A trained spotter reported hail up to the size of 1 inch in diameter. |
| May 2018 | Hail | Morrison | - | A trained spotter reported hail up to the size of golf balls. |
| May 2018 | Hail | Morrison | - | A public report was received of hail up to the size of quarters. |
| June 2015 | Thunderstorm Wind | Morrison | - | Lots of trees damaged between Morrison and Sterling in thunderstorm winds. |
| June 2014 | Thunderstorm Wind | Morrison | - | A trained spotter estimated wind gusts to 60 mph. |
| August 2011 | Heavy Rain | Morrison | - | Rain fell over a 10 to 15 minute period. |
| August 2011 | Heavy Rain | Morrison | - | Storm total precipitation as of 15:27 CDT. |
| April 2010 | Hail | Morrison | - | Non-severe hail (<1.0) fell in Morrison, IL around 628 pm April 4. |
| April 2010 | Hail | Morrison | - | Golf ball sized hail fell in Morrison, IL around 630 pm April 4. |
| June 2008 | Thunderstorm Wind | Morrison | - | Wind gusts estimated to be 60 mph blew down a tree limb onto a house in Morrison, IL at 2:49 pm June 7. |
| June 2008 | Thunderstorm Wind | Morrison | - | Winds estimated to be 60 mph blew down a tree across N Orange Street in Morrison, IL around 6:00 am June 15. Other branches were also blown down. |
| May 2006 | Thunderstorm Wind | Morrison | - | Estimated 60 mph winds |
| May 2006 | Hail | Morrison | - | nickel size hail with strong winds |
| June 2006 | Hail | Morrison | - | penny size hail on south side of town |
| June 2002 | Flash Flood | Morrison | - | Heavy rain resulted in a mudslide which closed portions of Highway 30 east of Morrison. |
| June 2002 | Flash Flood | Morrison | - | Spring Valley Road closed south of Morrison. |
| June 2002 | Flash Flood | Morrison | - | Train bridge at Lyndon Road buckled due to high water. |
| June 2002 | Flood | Morrison | - | Several streets with water up to the curb. |
| May 1999 | Tornado (F0) | Morrison | - | Law enforcement officials reported a brief tornado south of Morrison. No damage was reported. |
| June 1999 | Thunderstorm Wind | Morrison | - | Several large trees, roughly 4 to 6 feet in diameter, were blown down. Power lines were also downed. |
| June 1994 | Hail | Morrison | - | Early in the afternoon a large crowd at the Davenport, Iowa Airport were able to witness a funnel cloud near the Mississippi River between Princeton, Iowa, and Port Byron, Illinois. The large crowd was due to the Quad City Air Show in progress at the time of the event. Later in the afternoon thunderstorms strengthened in Whiteside County, Illinois. Numerous reports of hail was received. Walnut-size hail was the largest reported in Lyndon, Illinois, shortly before 1500 CST. One tree was also blown down just north of Lyndon shortly after 1500 CST. Chicago Doppler Radar estimated three and one-half to four inches of rain between Morrison and Sterling between 1300 CST and 1600 CST. |
| July 1994 | Hail | Morrison | - | Dime-size hail and 50 to 60 mph winds were reported in Fulton. Nickel-size hail was reported on Route 78 in northern Whiteside County. Some street flooding was reported in Morrison after a reported 1.7 inches of rain fell in about one hours time. |
| June 1994 | Hail | Morrison | - | Early in the afternoon a large crowd at the Davenport, Iowa Airport were able to witness a funnel cloud near the Mississippi River between Princeton, Iowa, and Port Byron, Illinois. The large crowd was due to the Quad City Air Show in progress at the time of the event. Later in the afternoon thunderstorms strengthened in Whiteside County, Illinois. Numerous reports of hail was received. Walnut-size hail was the largest reported in Lyndon, Illinois, shortly before 1500 CST. One tree was also blown down just north of Lyndon shortly after 1500 CST. Chicago Doppler Radar estimated three and one-half to four inches of rain between Morrison and Sterling between 1300 CST and 1600 CST. |
| June 1994 | Hail | Morrison | - | Early in the afternoon a large crowd at the Davenport, Iowa Airport were able to witness a funnel cloud near the Mississippi River between Princeton, Iowa, and Port Byron, Illinois. The large crowd was due to the Quad City Air Show in progress at the time of the event. Later in the afternoon thunderstorms strengthened in Whiteside County, Illinois. Numerous reports of hail was received. Walnut-size hail was the largest reported in Lyndon, Illinois, shortly before 1500 CST. One tree was also blown down just north of Lyndon shortly after 1500 CST. Chicago Doppler Radar estimated three and one-half to four inches of rain between Morrison and Sterling between 1300 CST and 1600 CST. |
| August 1993 | Hail | Morrison | - | Rapid developing thunderstorms produced golf-ball size hail, twice, at Morrison, Illinois. Both severe thunderstorms were about half an hour apart and moved northeast at 35 mph. The second storm arrived with a stronger punch of wind with measured wind gusts recorded at 68 mph. Numerous tree limbs were blown down. No dollar amounts were reported, but crop damage had to be significant considering the time of year. |
| April 2023 | Hail | Morrison | - | no account filed |
| May 2019 | Hail | Morrison | - | no account filed |
| May 2019 | Hail | Morrison | - | no account filed |
| May 2006 | Hail | Morrison | - | no account filed |
| May 2000 | Hail | Morrison | - | no account filed |
| May 2000 | Hail | Morrison | - | no account filed |
| May 2000 | Hail | Morrison | - | no account filed |
| May 2000 | Flood | Morrison | - | no account filed |
| May 1999 | Funnel Cloud | Morrison | - | no account filed |
| May 1999 | Funnel Cloud | Morrison | - | no account filed |
| May 1999 | Funnel Cloud | Morrison | - | no account filed |