| June 2008 | Flash Flood | Castle Park | 2 killed, $2,000,000 | At 3 a.m. EST June 8th, two people drowned when they were delivering newspapers and their car plunged into a fifty foot ravine created by a washed out road. A presidential disaster declaration was issued for Allegan county due to extensive flash flooding. |
| April 1965 | Tornado (F1) | not stated | 1 killed, 9 hurt, $250,000 | no account filed |
| July 1983 | Tornado (F2) | not stated | 1 killed, 1 hurt, $250,000 | no account filed |
| April 1956 | Tornado (F5) | not stated | 10 hurt, $25,000 | no account filed |
| June 1997 | Flash Flood | County-Wide | 4 hurt, $2,000,000 | Allegan County, which borders Ottawa County to the south, was impacted by the same slow-moving thunderstorms which trained across the area throughout the day of Friday, June 20th. The line of severe thunderstorms which moved across Allegan County Friday evening resulted in widespread flash flooding, with the worst of the flooding concentrated across the northern half of the county. The most significant damage occurred in the following Allegan County townships: Salem, Overisel, Hopkins, Wayland, Saugatuck, and Dorr. Notable rainfall totals for the 24 hours ending at midnight included 4.63 inches at Douglas, 5.40 inches at Allegan, 6.15 inches at Hamilton, and 7.20 inches at Wayland. Allegan County officials reported an extensive list of damage done to roads, drainage channels, homes, and businesses. Four people were injured, including a woman whose vehicle went nose-first into an 8-foot deep pit caused by a road washout. Extensive agricultural damage occurred in low-lying areas near flooded rivers and streams. Approximately 48 roads had near total or severe washouts (43 of which were closed for several days following the flooding). In addition, 126 roads had partial washouts. All totaled, 9 homes were destroyed, including 2 vacation cottages at Glenn Shores, 44 homes received major damage, and another 216 homes reported minor damage. Rain and draining groundwater caused a bluff along Lake Michigan at Glenn Shores, near Glenn, to collapse. The collapsing dune took several trees and 2 vacation cottages with it, 60 feet down onto the immediate lake shoreline. Eleven homes around Swan Lake in Cheshire Township were surrounded by water when the lake flooded. One business was destroyed, 7 reported major damage, and 30 received minor damage from flash flooding. The roof of the Regent Theater in the town of Allegan collapsed under the weight of rainwater. The 600-seat theater received major damage, but was not a total loss. The Otsego Lumber Company building also reported a roof collapse. Allegan County officials declared a local State of Emergency at 2:11 AM Saturday, June 21st, when they determined that local emergency recovery efforts were unable to handle the magnitude of the flooding situation. On Friday, June 27th, Governor John Engler issued a state disaster declaration for Allegan County. |
| April 1967 | Tornado (F2) | not stated | 4 hurt, $250,000 | no account filed |
| October 1967 | Tornado (F2) | not stated | 4 hurt, $25,000 | no account filed |
| April 1956 | Tornado (F3) | not stated | 3 hurt, $2,500,000 | no account filed |
| May 1980 | Tornado (F1) | not stated | 3 hurt, $25,000 | no account filed |
| July 1988 | Thunderstorm Wind | not stated | 3 hurt | no account filed |
| July 2002 | Thunderstorm Wind | Cheshire Center | 2 hurt, $200,000 | no account filed |
| July 2006 | Thunderstorm Wind | Allegan | 1 hurt, $50,000 | Numerous trees were blown down across Allegan county and a tree fell on a tent camper pinning a woman underneath. She sustained minor injuries. |
| September 1986 | Thunderstorm Wind | not stated | 1 hurt | no account filed |
| April 2013 | Flood | Glenn | $5,000,000 | Heavy rain caused significant flooding on rivers and streams across Allegan county. |
| June 2009 | Flash Flood | Holland | $4,000,000 | Numerous reports from trained spotters, fire department and media were received during event. Several reports of road washouts in and near the city of Wayland. There were also several reports of flooding in the vicinity of Old Mill Road. Additional reports of water in basements were received on 40th Street as well. Road washouts and significant damage to roads numbered 57 by the end of the heavy rain event.||A Local State of Emergency was declared. |
| August 2016 | Tornado (EF1) | Kibbie | $2,000,000 | An EF-1 tornado touched down just southwest of Bangor on and tracked northeast. The entire city lost power as well as hundreds of trees. Multiple structures in Bangor were damaged as well. Roof damage was noted on Main Street. New Beginning Ministries and the Bangor Police Department sustained damage. ||The tornado then tracked further northeast, causing significant damage at True Blue Farms along County Road 215 and the Columbia Township Hall in Grand Junction. The tornado tracked into extreme southern Allegan County before lifting about 2.5 miles northeast of Grand Junction on 103rd Ave west of 52nd Street. |
| August 2016 | Tornado (EF1) | Bravo | $1,500,000 | The second tornado of the day began 6 miles southeast of Fennville and tracked to 4 miles northeast of Hamilton and was also rated EF-1 and caused heavy tree damage along it's path. |
| April 2011 | Tornado (EF0) | Burnips | $1,000,000 | The tornado touchdown at a landscaping company where it tore a small section of roof of a warehouse building, knocked over several trailers, and blew the windows out of several cars. The tornado then struck a row of 100 yard long turkey pole barns. An approximately 100 ft section of one barn was uplifted and the collapsed. The roof was torn off about a 50 ft section of another barn. Further northeast, several small outbuildings were destroyed and trees were uprooted. Several houses in the path received minor roof and soffit damage with two garage doors damaged. The tornado lifted after partially destroying a 75 year-old 40 ft by 90 ft barn. |
| June 2024 | Thunderstorm Wind | Allegan | $500,000 | Allegan county emergency management reported that trees and wires were blown down across the county. |
| April 2023 | Hail | Hopkins | $500,000 | Hail up to two inches in diameter was reported by trained spotters. |
| April 2023 | Hail | Wayland | $500,000 | Hail up to nearly two inches in diameter was reported. Car windshields were cracked and the hail did considerable damage to roofs and siding of homes. |
| April 2020 | Hail | Plainwell | $500,000 | Very large hail to two inches in diameter was reported near Plainwell. |
| August 2021 | Tornado (EF0) | Burnips | $300,000 | An NWS storm survey determined that one outbuilding was destroyed near 26th street with metal roofing debris scattered along the path. A large irrigation structure was knocked over and damaged east of 26th street. Tornadic damage to trees was noted throughout the path. Intermittent roofing damage was also observed. |
| May 2000 | Flash Flood | Countywide | $300,000 | no account filed |
| July 2024 | Thunderstorm Wind | Allegan | $250,000 | There were several reports of downed trees, limbs and power lines and downed limbs caused damage to a few homes in the area. |
| August 2022 | Thunderstorm Wind | Otsego | $250,000 | Numerous trees and power lines were blown down in and near Otsego. |
| April 2020 | Hail | Groafschap | $250,000 | Very large hail of up to one and three quarters inches in diameter was reported in portions of Allegan county. |
| April 2020 | Hail | Dorr | $250,000 | The public reported very large hail up to hen egg size. |
| June 2019 | Thunderstorm Wind | Allegan | $250,000 | Numerous trees were blown down across much of Allegan county. At least one tree fell on a house. |
| June 2009 | Tornado (EF2) | Chicora | $250,000 | Damage to both trees and structures were found along the tornado path. A Circa 1940 pole barn was destroyed and numerous trees were snapped or uprooted just over a half a mile west of Chicora north of 108th Avenue. Further down the tornado's path, garage doors were blown out and carried 300 yards while two boats were blown out of the garage. The house suffered 80% shingle loss with one 2-foot diameter hole in the roof on the home's west side. This was approximately 0.35 miles north of Chicora. The most extensive damage occurred approximately one mile northeast of Chicora along 42nd Street. A roof was partially torn off of a house. A barn was blown about 20-feet off of its foundation. There were several telephone poles snapped with wires wrapped around a tree. A roof was ripped off a small unoccupied house with one wall collapsed. Debris was lofted up to one-half mile across a field. More shingle loss was found on the west side of a home located two-miles northeast of Chicora. Nearly 80% shingle loss was witnessed. Several utility poles were snapped with widespread tree damage through the area. More damage to a home was observed about a quarter-mile west of Schermerhorn Lake. The damage happened when numerous falling trees crushed it. One-quarter mile of 39th street was blocked by fallen trees. The trees were piled up to 15-feet deep on the road. As the tornado was weakening, a 30-foot metal tower was bent over half way up. This was located near the intersection of 37th Street and 109th Avenue. Minor roof damage was also noted to a home in this area. |
| May 1989 | Tornado (F2) | not stated | $250,000 | no account filed |
| June 1976 | Tornado (F1) | not stated | $250,000 | no account filed |
| June 1974 | Tornado (F2) | not stated | $250,000 | no account filed |
| August 2022 | Thunderstorm Wind | Otsego | $150,000 | Several large trees and tree limbs were blown down and one landed on an American legion building. There were numerous power outages and a shed was also destroyed. |
| July 2010 | Tornado (EF0) | Green Lake | $150,000 | A tornado resulted in damage to a house approximately 5 miles to the northeast of Wayland. The roof of the home sustained damage with shingles removed and scattered northeast. A wooden swing set was thrown into the east side of the home. A 2x4 was impaled into a pickup truck door located in the driveway. The tornado traveled northeast into wetlands. Tree branches were snapped and a few trees were uprooted. A barn sustained minor damage and a chicken coop was destroyed. Two homes and a barn had minor shingle loss and one home had a screen door torn from the home. |
| April 2008 | Tornado (EF1) | Plainwell | $150,000 | A National Weather Service storm survey determined that damage in the vicinity of 388 3rd Street in the southeast corner of Allegan county was caused by a tornado. The tornado was rated an EF-1 on the Enhanced Fujita Damage Scale. The tornado touched down just southwest of the above address in Allegan county.||The tornado was on the ground for nearly five miles, and traveled to the northeast. It did significant damage to a horse barn, lifted a trailer adjacent to the barn, damaged gravel yard equipment, lofted a tank, and uprooted numerous large trees. Some trees were snapped off.||No one was injured. The damage was concentrated about four miles east of Plainwell and extended from the 300 block of 102nd Avenue to the northeast, crossing 106th Avenue in the 100 to 200 block section. |
| August 2021 | Thunderstorm Wind | Dorr | $100,000 | Numerous trees were blown down in and near Dorr. |
| August 2007 | Thunderstorm Wind | Allegan | $100,000 | Multiple trees were blown down onto houses in Allegan. Several trees fell on cars in Fennville. |
| February 2001 | Flash Flood | Countywide | $100,000 | no account filed |
| May 2000 | Hail | Saugatuck | $100,000 | no account filed |
| August 2016 | Tornado (EF0) | Douglas | $75,000 | An EF-0 tornado touched down briefly near Riverside road. One outbuilding was destroyed and two homes incurred minor siding and roofing damage from debris and fallen trees. Significant tree damage was observed along a path that was about a quarter of a mile long and 25 to 50 yards wide. |
| August 2007 | Thunderstorm Wind | Otsego | $75,000 | A 65 mph wind gust was reported in Otsego. Numerous trees and power lines were blown down in and around Wayland. |
| June 2020 | Thunderstorm Wind | Groafschap | $50,000 | A peak wind gust to 73 mph was measured at Holland Tulip City Airport. There were several reports of wind damage and power outages. |
| July 2019 | Thunderstorm Wind | Wayland | $50,000 | Several trees were blown down. |
| July 2010 | Thunderstorm Wind | Pearl | $50,000 | Numerous trees and limbs were blown down five miles south southeast of Fennville and one and three quarters inch diameter hail was reported three miles southeast of Fennville. |
| December 2007 | Thunderstorm Wind | Lee | $50,000 | Trees and power lines were blown down across Allegan county. |
| December 2007 | Thunderstorm Wind | Wayland | $50,000 | Numerous power lines were blown down along with 6 inch tree limbs. |
| May 2004 | Thunderstorm Wind | Wayland | $50,000 | Several trees and power lines were blown down in Wayland. |
| May 2004 | Thunderstorm Wind | Diamond Spgs | $50,000 | Law enforcement reported several trees blown down in Monterey and near Wayland. Many trees were also blown down in Diamond Springs. |
| June 2003 | Hail | Allegan | $50,000 | Reports of one to as large as one and three quarters inch diameter hail were received from Allegan. |
| May 2001 | Tornado (F0) | Green Lake | $50,000 | A F0 tornado touched down on Round Lake and moved north across the eastern edge of Green Lake, then ending just north of 108th street. The tornado was a F0, producing maximum estimated wind speeds to 70 m.p.h. It was 50 yards wide and had a path length of 1.5 miles. The tornado passed over dozens of homes, but did not produce any structural damage. At the north end of Round Lake, a wooden dock was lifted out of the water and thrown into an area of trees. |
| May 1999 | Thunderstorm Wind | Allegan | $50,000 | A 60 mile per hour wind gust was recorded in Allegan. Numerous trees were downed including at least one that fell on a home in Allegan, causing roof damage. |
| June 2001 | Thunderstorm Wind | Allegan | $50,000 | no account filed |
| July 2001 | Flash Flood | Saugatuck | $50,000 | no account filed |
| June 2000 | Thunderstorm Wind | Countywide | $50,000 | no account filed |
| May 2000 | Hail | Allegan | $50,000 | no account filed |
| May 2000 | Hail | Pullman | $50,000 | no account filed |
| July 2006 | Thunderstorm Wind | Wayland | $40,000 | Trees and power lines were blown down in Wayland and Allegan. |
| July 2005 | Thunderstorm Wind | Wayland | $40,000 | no account filed |
| May 2000 | Hail | Plainwell | $40,000 | no account filed |
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