| September 1961 | Tornado (F1) | not stated | 4 hurt, $25,000 | no account filed |
| June 2010 | Thunderstorm Wind | Yeoward Addition | 2 hurt, $25,000 | Severe thunderstorm winds blew a semi trailer carrying pretzels onto its side on westbound Interstate 88. Both the driver and passenger suffered minor injuries. |
| February 1999 | Thunderstorm Wind | Sterling | 1 hurt, $28,000 | no account filed |
| 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. |
| September 2005 | Thunderstorm Wind | Coleta | 1 hurt | A tree was blown onto a moving vehicle, injuring the driver. |
| March 1990 | Tornado (F3) | not stated | $2,500,000 | no account filed |
| March 1981 | Tornado (F4) | not stated | $2,500,000 | no account filed |
| February 1997 | Flash Flood | Countywide | $600,000 | no account filed |
| July 2016 | Flash Flood | Unionville | $500,000 | The public reported several roads were closed in Morrison due to high water across the roads. |
| July 2010 | Flood | Erie | $500,000 | no account filed |
| May 1996 | Tornado (F1) | Fulton | $500,000 | no account filed |
| 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 | Flood | Erie | $250,000 | Heavy rains during the middle of the month resulted in the Rock River at Joslin going above the moderate flood stage level of 14 feet on June 22nd around 12 am. It crested around 14.73 feet around 830 pm on June 23. It fell below the moderate flood stage level around 5 pm June 24. |
| April 2011 | Flood | Albany | $250,000 | no account filed |
| July 2010 | Flood | Erie | $250,000 | no account filed |
| May 2005 | Lightning | Rock Falls | $200,000 | Lightning struck the chimney of the Montmorency School south of Rock Falls while students were being dismissed for the day. Luckily the chimney was located in the back of the school and the school bus boarding area is in the front so there were no injuries. The chimney had to be toppled by a wrecking company that evening for safety reasons. Repairs from the lightning strike and subsequent damage to part of the roof and a boiler were briefly put on hold when asbestos was discovered in the damaged area. |
| May 2009 | Flood | Albany | $166,670 | Heavy rains during the last week of April resulted in the Rock River at Joslin and Moline going above their respective moderate flood stage levels during the first few days of May.||The Rock River at Joslin surpassed its moderate flood stage level of 14 feet on May 1 around 6 pm. It crested around 14.5 feet around 12 am May 3. It fell back below its moderate flood stage level around 6 pm on May 4.||The Rock River at Moline surpassed its moderate flood stage level of 13 feet on May 2 around 3 pm. It crested around 13.14 feet around 3 pm May 3. It fell back below its moderate flood stage level around 9 am on May 4. |
| May 2010 | Flood | Albany | $150,000 | Heavy rains during the second week of May resulted in moderate flooding on the Rock River.||At Joslin, the river level surpassed the moderate flood stage level of 14 feet on May 15 around 10 am. It crested around 14.5 feet around 1 pm May 16. It fell below the moderate flood stage level around 1 pm May 17.||At Moline, the river level surpassed the moderate flood stage level of 13 feet on May 15 around 7 am. It crested around 13.3 feet around 7 am May 16. It fell below the moderate flood stage level around 1 am May 18. |
| May 2011 | Thunderstorm Wind | Unionville | $100,000 | Wind gusts estimated to be 70 mph blew a new machine shed over at a farm on Creamery Rd about 3 miles southwest of Morrison, IL around 6 pm CDT May 22. The doors of the shed had yet to be attached. The shed fell onto a tractor and semi-truck that were inside. |
| June 2011 | Flash Flood | Rock Falls | $100,000 | Heavy rains resulted in flash flooding of several streets in Rock Falls, IL during the morning of June 9. The flood waters were 2 to 4 feet deep in some areas. |
| July 2003 | Thunderstorm Wind | Coleta | $100,000 | Radio tower at Fire Station downed |
| May 2010 | Flash Flood | Penrose | $50,000 | The southeast half of Whiteside County received 3 to 4 inches of rain during the early morning hours of May 13 which resulted in some flash flooding. Several residences in the Sterling and Rock Falls areas reported flooded basements. |
| July 2017 | Tornado (EF1) | Fulton | $40,000 | Tornado was rated an EF-1 which touched down on the eastern shore of the Mississippi River and hit the city of Fulton Illinois. The tornado tracked east northeast and caused damage to mainly trees and a cemetery along its 3.7 mile path and max width of 150 yards. Two garages and one farm outbuilding, and some corn were also damaged. |
| June 2010 | Thunderstorm Wind | Rock Falls | $30,000 | One-third of the roof was torn off a steel warehouse at a trucking company. |
| April 2010 | Thunderstorm Wind | Ustick | $25,000 | Wind gusts estimated to be 70 mph blew some trees and branches down about 14 miles south of Mount Carroll, IL around 835 pm April 5. Some vehicles were damaged by the fallen branches. Also, a power outage was observed. |
| June 2009 | Thunderstorm Wind | Sterling | $25,000 | Wind gusts estimated to be 70 mph blew down a large tree at Avenue J and 6th St in Sterling, IL around 615 pm June 27. The tree snapped some power lines and blocked the road. Several other smaller branches were also blown down. |
| 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. |
| June 2009 | Thunderstorm Wind | Erie | $25,000 | Wind gusts estimated to be 70 mph blew down several tree limbs and power lines in Erie, IL around 615 pm June 19. Some limbs were blocking a road. |
| 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 | Thunderstorm Wind | Prophetstown | $25,000 | Trees down |
| May 1988 | Tornado (F1) | not stated | $25,000 | no account filed |
| March 1966 | Tornado (F2) | not stated | $25,000 | no account filed |
| June 2005 | Thunderstorm Wind | Fulton | $20,000 | Three large trees down with numerous power lines down that caused damage to cars and houses. A few shingles were pulled off 2 houses. |
| June 2005 | Thunderstorm Wind | Albany | $20,000 | Large limbs and power lines down. A business had several broken windows and a tree fell on a house causing moderate damage. |
| September 2005 | Thunderstorm Wind | Countywide | $20,000 | Storms entered Whiteside county south of Albany at around 1555 CST. Numerous trees and power lines were felled from Albany to Coleta. Based on radar data and spotter reports, the following times (all CST) have been established; Albany 1600-1605, Morrison 1615-1620, Coleta 1620-1630. |
| July 2003 | Hail | Rock Falls | $20,000 | Small tree limbs down in estimated 43 knot (50 mph) winds |
| July 2003 | Hail | Rock Falls | $20,000 | At Oppold Marina Park |
| July 2003 | Lightning | Sterling | $20,000 | Large branch fell on house |
| July 2003 | Hail | Sterling | $20,000 | Tampico Rd. |
| July 2003 | Hail | Morrison | $20,000 | no account filed |
| July 2017 | Thunderstorm Wind | Fulton | $15,000 | Local law enforcement reported a barn was blown down. |
| 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 | Sterling | $15,000 | Winds estimated to be 65 mph blew down several tree limbs on the west side of Sterling, IL around 11:05 am June 8. The limbs were over six inches in diameter. Some branches broke power lines and cable television lines. A power outage was also noted. |
| July 1999 | Thunderstorm Wind | Countywide | $15,000 | According to a newspaper account, thunderstorm winds blew the roofs off some cabins and damaged some mobile homes along the Rock River near Prophetstown. Thunderstorm winds also damaged Montmorency School south of Rock Falls, and downed trees and power lines, which blocked several roads throughout the county. |
| July 2017 | Flood | Sterling Arpt | $13,000 | Heavy rainfall of 3 to over 12 inches over significant areas from 20 to 22 July in southern Wisconsin and Northern Illinois moved downstream causing the Rock River to rise well above major flood stage levels just downstream of Freeport down to the Mississippi at Moline. ||Como rose above major flood stage level of 12.0 feet on July 21st, 2017 at approximately 1030 PM CST. It crested around 15.7 feet at approximately 830 AM CST on July 23rd, 2017 and fell below 12.0 feet at approximately 1230 AM CST on July 31st. Widespread river flooding and some flash flooding resulted in a preliminary estimation of 10 to 20 thousand dollars in damage. |
| June 2013 | Thunderstorm Wind | Tampico | $10,000 | Power lines and trees were downed in Tampico. |
| August 2010 | Thunderstorm Wind | Unionville | $10,000 | Wind gusts estimated to be 70 mph were observed in Morrison, IL around 210 pm CDT August 20. Several trees and branches were blown down in the area as well as a utility pole along Prairie Center Road. Route 30 was closed for a while due to tree removal operations. The sources for this report were the spotter's police scanner and a newspaper. |
| June 2010 | Thunderstorm Wind | Sterling | $10,000 | Wind gusts estimated to be 70 mph blew down 10 large trees at Emerald Hill Golf Course about 4 miles east northeast of Sterling, IL around 118 pm CST June 18. This report was relayed by a Rockford area television station. |
| June 2010 | Thunderstorm Wind | Rock Falls | $10,000 | Wind gusts estimated to be near 70 mph blew the roof off of a mobile home on Harbor Drive. |
| May 2008 | Thunderstorm Wind | Sterling Arpt | $10,000 | Winds estimated to be 65 mph blew down some trees and damaged a building about 6 miles south of Rock Falls, IL. Some livestock was also reported to be missing. |
| June 2008 | Thunderstorm Wind | Fulton | $10,000 | Wind gusts estimated to be 60 mph blew down some tree branches throughout the town of Fulton, IL around 4:30 am June 6. The branches fell onto some power lines breaking them causing a power outage. |
| 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. |
| June 2007 | Thunderstorm Wind | Erie | $10,000 | Some grain bins were blown off of their foundations into each other and a pole building was destroyed. In addition, some power poles and large tree limbs were blown down and a portion of a corn field was flattened. Time estimated. |
| July 2006 | Thunderstorm Wind | Fulton | $10,000 | Trees down with the facade to several buildings damaged. Time is estimated based on radar. |
| August 2004 | Thunderstorm Wind | Countywide | $10,000 | Squall line left Clinton County Iowa and entered Whiteside County Illinois around 1900 CST (0100 UTC). Sporatic damage consisting of mainly trees and power lines down occurred across the northern part of the county from near Garden Plain, to Morrison, to north of Sterling. Trees were reported down on Elston Road during 1902-1907 CST. The exact location is not known but the likely area is between Fulton and Garden Plain with the immediate Garden Plain area being most probable. The KCWI AWOS reported 44 knots ( 51 mph) during 1845-1855 CST in Clinton County Iowa. Considerable damage occurred during 1915-1920 CST along Norrish Road, Hazel Road, and the intersection of Bishop and Holly Roads immediately to the north and east of Morrison. A large number of trees were downed along with power lines. The KDVN 88D showing a considerable increase in wind speed in this area to at least 60 knots aloft. Additional tree and power line damage occurred at the intersection of Holly and Habben Roads during 1923-1928 CST and the intersection of Flufs and Hoover Roads during 1944-1949 CST. The second location is located several miles north of Sterling. The KSQI AWOS south of Sterling reported 41 knots (47 mph) during 1945-1955 CST. Another area of damage occurred in the Coleta area during 1935-1942 CST with reports of trees and power lines down. |
| May 2001 | Thunderstorm Wind | Fulton | $10,000 | Strong winds downed 3 large trees and blew over a small greenhouse. Numerous tree limbs and power lines were also downed. Reported by law enforcement and emergency management. Initial reports by law enforcement and the public indicated a tornado, but a post storm survey conducted by emergency managementindicated the damage was due to strong straight line winds. |
| July 2004 | Tornado (F1) | Prophetstown | $7,500 | Also from newspaper and insurance reports |
| June 2010 | Thunderstorm Wind | Morrison-Rockwood Sp | $5,000 | Wind gusts estimated to be 60 mph blew down some power lines north of Morrison, IL around 520 am June 23. |
| June 2010 | Thunderstorm Wind | Rock Falls | $5,000 | Wind gusts estimated to be 65 mph blew down several tree limbs in Rock Falls, IL at 849 pm June 18. A power outage was observed in half of the town. |
| June 2010 | Thunderstorm Wind | Rock Falls | $5,000 | Wind gusts estimated to be 60 mph blew down a 4 to 5 inch diameter tree limb onto a gas station in Rock Falls, IL at 230 pm June 18. Widespread tree debris was observed in the area. |
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