| June 2014 | Flood | Rock Rapids | $2,000,000 | Repeated heavy rains caused record flooding of the Rock River. Numerous homes, businesses, roads, farmland, and other low areas were flooded, forcing many people to evacuate their homes and rely on Red Cross and other volunteer assistance for several days. The flooding was especially severe in Rock Rapids, where the river crested at a record 13.98 feet above flood stage on June 17th. |
| June 1994 | Thunderstorm Wind | Rock Rapids | $50,000 | no account filed |
| June 2001 | Thunderstorm Wind | Rock Rapids | $20,000 | Thunderstorm winds blew the roof off a large barn and damaged the walls of the barn. |
| May 2012 | Thunderstorm Wind | Rock Rapids | $5,000 | Thunderstorm winds blew over two large grain bins and caused tree damage. |
| June 2008 | Thunderstorm Wind | Rock Rapids | $5,000 | Thunderstorm winds blew out a wall of a 50 by 50 foot machine shed. |
| May 2000 | Thunderstorm Wind | Rock Rapids | $5,000 | Thunderstorm winds caused tree damage, including small trees blown down. |
| July 1999 | Thunderstorm Wind | Rock Rapids | $5,000 | no account filed |
| June 1994 | Tornado (F0) | Rock Rapids | $500 | no account filed |
| June 1995 | Thunderstorm Wind | Rock Rapids | $200 | Thunderstorm winds blew off a garage door. |
| July 2025 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm wind gusts were measured by a personal weather station. |
| June 2025 | Thunderstorm Wind | Rock Rapids | - | Winds were measured by a personal weather station. |
| June 2025 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm winds blew down several trees in Rock Rapids. |
| June 2024 | Flash Flood | Rock Rapids | - | Flooding of Moon Creek on the west edge of Rock Rapids resulted in evacuations. For a more comprehensive description of flood damage, please see other entries for areal and river flooding for Lyon County. |
| June 2019 | Hail | Rock Rapids | - | Very little wind with a few quarter-sized hailstones. |
| June 2019 | Thunderstorm Wind | Rock Rapids | - | Large tree branches down. |
| May 2014 | Hail | Rock Rapids | - | Hail was accompanied by wind gusts estimated at 45 mph. |
| June 2013 | Flood | Rock Rapids | - | Heavy rain caused minor flooding of the Rock River, with lowlands, including some farmland and a few rural roads affected. |
| May 2012 | Flood | Rock Rapids | - | Heavy rain caused minor lowland flooding of the Rock River, with a few rural roads also affected. The river crested at 1.98 feet above flood stage at Rock Rapids on May 28th. |
| June 2011 | Flood | Rock Rapids | - | Heavy rain resulted in minor flooding of the Rock River, with flooding of some farmland along the river. The river crested at 1.9 feet above flood stage at Rock Rapids on June 23rd. |
| August 2011 | Hail | Rock Rapids | - | Large hail, driving by wind gusts to 60 mph, caused an unknown amount of crop damage in the area. |
| July 2011 | Flood | Rock Rapids | - | Heavy rain caused minor lowland flooding of the Rock River, including some flooded parkland and farmland. The river crested at 2.5 feet above flood stage at Rock Rapids on July 16th. |
| August 2011 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm winds caused tree damage, including numerous branches blown down. A few large branches fell on homes. The winds were accompanied by quarter size hail. |
| March 2010 | Flood | Rock Rapids | - | Rapid melting of a heavy winter snowpack caused moderate flooding of the Rock River in Lyon County. Farmland and other lowlands along the river were flooded. |
| March 2010 | Flood | Rock Rapids | - | Rapid melting of a heavy winter snowpack caused flooding of the Big Sioux River which resulted in major flooding along part of the river. Several fields and roads were flooded. The snowmelt also caused the Rock River to flood. It crested at 4 feet above flood stage at Rock rapids on March 15th. |
| September 2010 | Flood | Rock Rapids | - | Heavy rain caused record flooding of the Rock River. Farmland and several roads were affected, including in and near Rock Rapids. The river rose above flood stage at Rock Rapids on September 23rd, crested at a record 9.25 feet above flood stage on September 25th, and fell below flood stage on September 28th. |
| June 2010 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm winds caused tree damage, including several trees blown down. |
| September 2010 | Hail | Rock Rapids | - | Large hail dented vehicles and windshields;. |
| June 2008 | Flood | Rock Rapids | - | Heavy rain caused minor to moderate flooding of the Rock River, affecting farmland along the river. |
| June 2008 | Flash Flood | Rock Rapids | - | Thunderstorms produced heavy rain which caused flash flooding along Tom Creek, as well as flooding of roads and other low areas in and near Rock Rapids. Cropland in the area was also flooded. |
| March 2007 | Flood | Rock Rapids | - | Warm temperatures caused a rapid snowmelt which caused the Big Sioux River to rise above flood stage for several days. The flooding was minor to moderate with no significant damage reported. The snowmelt also caused the Rock River to flood. It crested at 6.3 feet above flood stage at Rock Rapids on March 15th.| |
| August 2006 | Hail | Rock Rapids | - | Large hail was accompanied by 40 mph winds and heavy rain. |
| September 2005 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm winds caused tree damage, including a large tree blown down onto a county road. |
| September 2005 | Hail | Rock Rapids | - | Large hail accumulated to a depth of 6 inches. |
| July 2004 | Thunderstorm Wind | Rock Rapids | - | Thunderstorm winds caused tree damage. |
| July 2004 | Hail | Rock Rapids | - | Large hail, driven by strong winds, caused damage to corn and soybean crops, The amount of damage was not known. |
| June 2003 | Tornado (F0) | Rock Rapids | - | A brief tornado caused no reported damage. |
| July 2001 | Flash Flood | Rock Rapids | - | Rainfall of three and a half inches caused flooding of the Lyon County fairgrounds, forcing several fair events to be cancelled or postponed. The fair manager described part of the fairgrounds as like a lake, and six to eight inches of water stood in livestock barns. |
| April 2021 | Hail | Rock Rapids | - | no account filed |
| August 2020 | Hail | Rock Rapids | - | no account filed |
| August 2017 | Hail | Rock Rapids | - | no account filed |
| May 2016 | Hail | Rock Rapids | - | no account filed |
| September 2010 | Hail | Rock Rapids | - | no account filed |
| July 2009 | Hail | Rock Rapids | - | no account filed |
| July 2009 | Hail | Rock Rapids | - | no account filed |
| March 2006 | Hail | Rock Rapids | - | no account filed |
| April 2006 | Flood | Rock Rapids | - | no account filed |
| August 2006 | Hail | Rock Rapids | - | no account filed |
| April 2004 | Hail | Rock Rapids | - | no account filed |
| April 2004 | Thunderstorm Wind | Rock Rapids | - | no account filed |
| April 2004 | Hail | Rock Rapids | - | no account filed |
| August 2003 | Hail | Rock Rapids | - | no account filed |
| September 2002 | Hail | Rock Rapids | - | no account filed |
| June 2001 | Hail | Rock Rapids | - | no account filed |
| June 2001 | Hail | Rock Rapids | - | no account filed |
| June 2001 | Hail | Rock Rapids | - | no account filed |
| August 2001 | Hail | Rock Rapids | - | no account filed |
| May 2000 | Hail | Rock Rapids | - | no account filed |
| July 1998 | Thunderstorm Wind | Rock Rapids | - | no account filed |
| August 1998 | Hail | Rock Rapids | - | no account filed |
| September 1997 | Hail | Rock Rapids | - | no account filed |