| July 1995 | Thunderstorm Wind | Countywide | 1 killed, $150,000 | no account filed |
| April 1977 | Tornado (F1) | not stated | 6 hurt, $2,500,000 | no account filed |
| May 1973 | Tornado (F2) | not stated | 6 hurt, $250,000 | no account filed |
| August 2000 | Tornado (F1) | Ashland | 4 hurt, $2,000,000 | A tornado touched down on the west side of Ashland near Lindale Avenue then moved east along West Main Street causing significant damage and four minor injuries. The damage path was 50 to 100 yards wide, intermittent and nearly three miles in length. The most severe damage occurred a few blocks west of downtown. Major structural damage occurred to several homes in the area including one that had an entire side blown apart. Damage to the downtown business district was much less severe with most of the damage being in the form of broken windows and torn off siding. However, three buildings lost large sections of roof and a fourth had a brick wall collapse. The roof of one of the buildings was found six blocks east of downtown. East of the business district, the damage path was intermittent with only a dozen or so homes sustaining minor damage. In total, 112 homes and 20 businesses were damaged. Of those totals, 23 homes and four businesses suffered major damage. Several cars were destroyed and hundreds of trees were toppled. Six power poles were also snapped near ground level. |
| August 2023 | Flash Flood | Ruggles | 2 hurt, $400,000 | Widespread flash flooding with localized significant impacts across much of northwest and central Ashland County. More than one dozen reported road closures due to flooding of creeks, streams and rivers, with several inches to several feet of flowing water across roadways. Some major roadways closed by flooding include several portions of US-250, US-42, OH-56, OH-302, in addition to several township and county roadways. Four water rescues were reported across this area due to vehicles driving into flooded roadways. Township Road 1275 near the intersection of OH-89 in Perry Township was washed out due to flooding. A vehicle drove into the washed out culvert and two occupants needed to be rescued, and were transported to a local hospital with minor injuries. Radar estimated 2.75 to 3.5 inches of rainfall in a 3 hour period, with a bulk of the rain falling in a 90 minute or less period. |
| July 1999 | Thunderstorm Wind | Countywide | 1 hurt, $70,000 | Trees downed across the entire county with the most concentrated damage in the northwest corner near Ruggles and Nova. A male of unknown age was injured by flying debris while camping at a campground in Nova. Fallen trees resulted in a major railroad track being closed for three hours. Power poles were snapped at Hayesville and Widowville. At Jeromesville, many trees were downed including two that fell on houses. A fence at a Jeromesville ball field was ripped out of the ground. |
| July 2005 | Thunderstorm Wind | Polk | 1 hurt, $30,000 | Severe thunderstorm winds downed a few trees, numerous large tree limbs and some power lines across the area. One person was injured by falling debris. |
| July 2006 | Flash Flood | South Portion | $5,200,000 | Heavy thunderstorm rains fell on the southern portion of Ashland County during the afternoon and early evening hours of July 10th. Rainfall rates approached 3 inches per hour at times and a spotter near the intersection of State Route 3 and College Hill Road, just south of the Ashland County line, measured a storm total of 7.5 inches. Cooperative observers at the Mohicanville Dam measured 2.8 inches of rain between 3 and 4 p.m. and a storm total of 3.41 inches. Other reports from the county included: 3.26 inches in Loudonville, 2.89 inches at Pleasant Hill Dam and 2.10 inches in the City of Ashland. Runoff from the heavy rains caused the Mohican River to rise very quickly. A four foot wall of water reportedly moved down the river forcing several people in canoes to climb into trees. Firefighters later rescued eight people from the river or trees. The river continued to rise more than a foot per hour through the evening hours. Up to 700 campers had to be evacuated from Mohican State Park, many by boat. Several campgrounds on Wally Road south of Loudonville also had to be evacuated because of flooding. These evacuations continued through 10 p.m. and were hampered by several mudslides along Wally Road. A woman had to be rescued from her home on Pleasant Hill Road. Dozens of campers and mobile homes were damaged in the State Park and campgrounds. Extensive flooding also occurred along Pine Run south and west of Loudonville. Four barns along the run were washed away and a bridge on State Route 3 was heavily damaged. An historic mill along Pine Run sustained over $100,000 in damage. County Roads 3275, 1027 and 3175 (Wally Road) were washed out in several locations. At least seven Hanover Township roads were also washed out. Total damage to roads and bridges in the county approached $1 million. Flooding was reported as far north as the City of Ashland where several streets were flooded. Over two dozen roads in the county had to be closed because of flooding including State Route 60 south of Hayesville, and State Routes 3, 39 and 97 near Loudonville. Hundreds of homes and mobile homes sustained damage, mainly from basement flooding. Crop losses in the county are also expected to be substantial as standing water delayed the wheat crop harvest. |
| August 2007 | Flash Flood | Savannah | $3,000,000 | Heavy rain producing thunderstorms affected Ashland County during the late evening hours of August 20th and early morning hours of August 21st. Rainfall totals from across the county included: 3.32 inches at Ashland; 3.46 inches at Jeromesville; 5.18 inches at Mifflin and 4.02 inches at Loudonville. Runoff from this rain combined with ground already saturated from earlier rains led to significant flooding across portions of Ashland County. Widespread lowland flooding occurred across the county and many roads had to be closed because of flooding. Some of the worst flooding occurred near Loudonville after the Black Fork of the Mohican River quickly rose and left it's banks. Many homes and businesses along and near the river sustained flood damage. Hundreds of other homes in the county suffered damage, mainly from basement flooding. Finally, standing water and erosion from the runoff caused damage to agricultural interests in the county. | |
| November 2002 | Tornado (F2) | Polk | $1,600,000 | A tornado touched down two miles southwest of Polk near the intersection of County Road 601 and Township Road 902. A new home at this location was destroyed. The tornado then traveled northeast across the western and northern portions of Polk. Two homes on the west side of Polk were heavily damaged and a small barn was leveled just north of town. Another 10 to 12 buildings, including two public buildings sustained minor damage in Polk. From Polk, the tornado traveled northeast across rural areas and passed just to the west of Albion. Two homes along County Road 620 just west of Township Road 521 lost entire roofs and had exterior walls partially or entirely knocked down. A nearby barn was leveled with debris thrown as much as one half mile. A small boat tethered in a pond near the barn was found a quarter mile away and the pond itself was filled with debris. A church in the area had it's steeple toppled. The tornado continued northeast and damaged several more homes and buildings. The tornado moved into Medina County just east of County Road 175. In the county, a total of five homes were either completely destroyed or declared unlivable with another 11 homes sustaining enough damage to require significant repairs. Approximately 30 additional homes and buildings suffered minor damage. A few dozen cars sustained varying amounts of damage. The tornado was on the ground in Ashland County for approximately five and a half miles with the damage path no more than 50 yards in width. |
| August 2007 | Tornado (EF1) | Sullivan | $1,400,000 | A storm survey was conducted and an EF1 tornado was confirmed in northeastern Ashland County. The tornado touched down northeast of Sullivan along Black River School Road just to the west of the Medina County line. Two school buildings were damaged by the tornado. One of the schools lost a section of roofing over a gymnasium. Sections of roofing along the remainder of the building were lifted and buckled by tornado winds. Significant amounts of rain water got into the building as a result of this roof damage. Water damage in the school was extensive and the gymnasium floor will need replacement. A modular building used as a classroom also sustained damage. Fences surrounding recreational fields at the school were also damaged. A house across the road from the schools was slightly damaged and a communication tower nearby was toppled. Many trees were downed. The tornado had a damage path around one half mile in length and about 30 yards in width. |
| June 2012 | Thunderstorm Wind | Perrysville | $750,000 | An intense line of thunderstorms or Derecho moved across southern Ashland County during the afternoon of June 29th causing extensive damage. Winds were estimated to be as much as 65 mph. Over 50 percent of residents in the southern third of the county lost power during this event. Power was not completely restored for several days. Hundreds of trees were downed across the county along with many utility poles forcing the closure of some of roads and streets. Damage to homes and buildings was also extensive. Dozens of homes and buildings lost roofing or siding with many other homes damaged by fallen trees. Clean up costs were extensive. The clean up was hampered by an ongoing heat wave with afternoon temperatures in the upper 90s. Significant crop losses are also expected. Damage from this storm in southern Ashland County was comparable to the remnants of Hurricane Ike in September 2008. |
| February 2011 | Flood | Nova | $500,000 | Heavy rain and rapid snow melt led to widespread flooding across Ashland County. Rainfall totals across the county ranged from one to three inches on February 27th and 28th. Up to ten inches of heavy snow was on the ground at the onset of the rain. This snow rapidly melted as temperatures warmed into the 50s on the 28th. Up to an additional inch of water equivalent rainfall was released from the melted snow. Hundreds of homes in the county sustained damage, mainly from basement flooding. Many roads had to be closed because of the the flooding. |
| June 2006 | Thunderstorm Wind | Countywide | $450,000 | During the late afternoon hours of June 22nd, severe thunderstorms moved across Ashland County and caused extensive damage. The worst damage resulted from straight line winds caused by a downburst that started east of Charles Mills Lake and continued through the Mifflin area to near Hayesville. Winds were estimated to be greater than 80 mph. Up to a thousand trees were downed along this path. Near Mifflin, a 120 foot tall radio tower was knocked down. Several homes in Mifflin lost sections of roof and three garages were also destroyed. One of the homes was damaged enough to be declared uninhabitable. In Hayesville, over half the the trees in the town were blown down and many homes were damaged. Numerous roads had to be closed because of downed trees, limbs and power lines. Across the remainder of the county, trees and power lines were reported down from as far north as Polk to Loudonville in the southeast corner of the county. At least two homes were damaged by fallen trees in Loudonville. Thousands of people lost power during this event. |
| August 2000 | Thunderstorm Wind | Savannah | $450,000 | A thunderstorm downburst with winds estimated at 80 to 100 mph moved across Ashland County. Over 40 trees were blown down in Savannah along with several power poles. A tree fell on a moving car in Savannah but the driven was not hurt. Many trees were knocked down in Sullivan with one home losing part of a roof. A large dairy barn housing 140 cows was completely destroyed one mile east of Hayesville. A nearby house was knocked off its foundation and a house in Hayesville lost most of its roof. Many trees and power poles were downed in and around Hayesville and a car was destroyed by a fallen tree. |
| August 2007 | Thunderstorm Wind | Ashland | $300,000 | A portion of a roof on a grocery store was blown off. The grocery store was located on the north side of Ashland. Trees were also reported down in the area. A survey team followed up on the report and found a significant portion of the grocery store's roof was blown off. Also noted was a barn southwest of the store that had a portion of its roof blown off. Numerous trees were down mainly between State Routes 511 and 58. Two semi trailers and a construction trailer were blown onto their sides near State Route 511 and U.S. 250. |
| June 2006 | Flash Flood | North Portion | $250,000 | Thunderstorms dumped torrential rain on the northern part of Ashland County during the late evening hours of June 21st and early morning hours of June 22nd. As much as 4 to 6 inches of rain fell in the Sullivan area with 3 to 4 inches reported at Polk, Nankin, Nova and Savannah. Several roads had to be closed because of flooding. U.S. Route 224 had to be closed near Sullivan after a drainage ditch flooded. A home nearby was destroyed around 3:30 a.m. after flood waters two to three feet deep accumulated around the house and caused a basement wall to fail. One person in the home had to rescued by emergency personnel. A few gravel roads in the northern tier of townships in the county were partially washed out. Several homes sustained damage from basement flooding. Most of these were in and around Sullivan. Crop losses in the county are expected to be significant as standing water was observed in many fields. |
| July 2003 | Flash Flood | Ashland | $250,000 | Thunderstorms dumped two to threes of rain on the central portion of Ashland County in about 90 minutes. Lowland and urban flooding occurred over the northern half of the city of Ashland. A mobile home park was under as much as two feet of water during the peak of the storm. Many streets had to be closed in Ashland because of flooding. Dozens of homes experienced basement flooding. Several cars were also damaged by flood waters. State Route 302 was closed for several hours to the west of Nankin. |
| March 1985 | Tornado (F0) | not stated | $250,000 | no account filed |
| June 1981 | Tornado (F1) | not stated | $250,000 | no account filed |
| June 1977 | Tornado (F0) | not stated | $250,000 | no account filed |
| August 1998 | Flash Flood | Countywide | $200,000 | Heavy thunderstorm rain caused flooding of numerous streets, streams, basements and low lying areas. The water was as deep as the tops of cars on some roads; a few people had to be rescued from their vehicles. Culverts collapsed on several roads. |
| November 2017 | Tornado (EF1) | Widowville | $150,000 | An EF0 tornado touched down in rural Ashland County near the intersection of U.S. Route 30 and State Route 511. Some hardwood trees at that location were either toppled or damage. The tornado then intensified to EF1 strength as it continued east northeast across open farmland. A farm wagon was tossed and destroyed by the tornado and a cow was thrown and sustained a broken leg. The tornado heavily damaged a home along State Route 60 about a third of a mile north of U.S. 30. The house lost about half of its roof and had a brick chimney toppled. Some windows were blown out and the house lost siding on all four sides. An adjacent car port was leveled and a large overhead door in a nearby garage was blown in. The 90 year old occupant of the house was not injured. After striking the house, the tornado weakened and eventually lifted just east of State Route 60. The damage path from this tornado was just over two miles in length. |
| July 2006 | Tornado (F1) | Perrysville | $150,000 | A F1 tornado moved out of Richland County and into Ashland County south of Perrysville. The tornado moved into Mohican State Forest and dissipated. The damage path was approximately four miles in length and no more than fifty yards in width. The damage path was intermittent. Little structural damage was observed along the damage path, but hundreds of tree were down. |
| July 2006 | Flash Flood | South Portion | $150,000 | An area of heavy rainfall developed over the central portion of Ashland County during the late afternoon and evening hours of July 12th. As a result, flash flooding caused State Route 60 to be closed through the evening. Several other roads across the central and southern portion of the county were also reported to be closed. Mifflin and Hayesville were particularly hard hit. County Road 2075 just southeast of Mifflin had a bridge washed. |
| May 2004 | Thunderstorm Wind | Countywide | $125,000 | A line of severe thunderstorms moved across Ashland County and downed dozens of trees. Scattered power outages were also reported. Some of the worst damage in the county occurred near Loudonville where several homes were damaged and at least two highways blocked by fallen trees. A few vehicles were damaged by fallen trees and flying debris. |
| July 2003 | Thunderstorm Wind | Countywide | $125,000 | A line of severe thunderstorms moved across Ashland County and downed dozens of trees. Over 40 trees and large limbs were downed in Ashland alone. Many trees were also toppled in the southern portion of the county near Mohican State Park. A shower house at the park was heavily damaged as were three cars parked nearby. |
| July 1999 | Thunderstorm Wind | Countywide | $125,000 | A TV tower was toppled near Nova and an equipment building was blown down and destroyed five miles northeast of Loudonville on County Road 2575. A small barn near the equipment building was also heavily damaged. |
| June 2019 | Flash Flood | Polk | $120,000 | Redhaw Creek in Polk washed out portion of Route 800 and flooded County Road 175. Wolf Run Creek flooded Route 700 in Polk. 3.74 rainfall measured in Sullivan as of the morning of the 17th. |
| July 2021 | Flash Flood | Paradise Hill | $100,000 | Numerous road closures across the northern part of the county due to flooding, including the city of Ashland. Water was overtopping a pond and flowing across OH-250 into another pond near Bailey Lakes. 3' to 3.5' of water flowing over multiple roadways in Sullivan Township, where multiple roads were impassable with several residents unable to leave their homes. Culvert was washed out on Township Highway 673 between CR-620 and OH-58 due to flooding of Orange Creek. |
| September 2007 | Thunderstorm Wind | Ashland | $100,000 | Straight line winds created a damage path about one hundred yards wide and about four miles long. Along this path, numerous trees and large limbs were reported down. Several buildings had roof damage, and a box trailer was blown over by the severe winds. |
| July 2003 | Flash Flood | Countywide | $100,000 | Thunderstorms dumped two to three inches of rain on Ashland County in a short period of time. 1.75 inches of rain was measured at Polk in 75 minutes during the peak of the storm. Widespread lowland and street flooding occurred with many streams and creeks leaving their banks. Several vehicles became stranded in flooded underpasses in Ashland. Well over a dozen roads had to be closed in the county due to flood waters up to three feet deep. |
| August 2003 | Flash Flood | North Portion | $100,000 | Thunderstorms dumped heavy rains on portions of Ashland County. Lowland flooding occurred across the northern half of the county. Several roads were closed near Polk and Nankin. A car was washed off Rowsburg Road (County Road 1302) to the east of Interstate 71. Flood waters were reported to be up to three feet deep. |
| July 1999 | Thunderstorm Wind | Countywide | $100,000 | Thunderstorms producing strong downburst winds downed dozens of trees and limbs throughout the county. A 60 by 120 foot pole barn was blown down and totally destroyed east of Hayesville on County Road 30A. The poles supporting the front side of the building were pulled completely out of the ground while the poles in the back were snapped off at ground level. A home under construction on Township Road 251 south of Rowsburg also suffered damage. |
| June 1997 | Flash Flood | Countywide | $80,000 | no account filed |
| June 2019 | Flood | Polk | $75,000 | Polk Law enforcement reported high water and impassable roads on route 89 and route 800 near Polk. Redhaw Creek flooding washed out a portion of Route 800. Route 700 near Wolf Run Creek was impassable due to high, swift water over the road. County Road 175 south of the town of Redhaw was impassable due to swift water over the road. |
| July 2013 | Tornado (EF0) | Rowsburg | $75,000 | A weak EF0 tornado touched down west of Rowsburg near the intersection of County Roads 1302 and 251. The tornado continued east southeast for about a mile before dissipating on the north end of Rowsburg. The damage path indicates that the tornado was probably intermittent and at tree top level. A barn was toppled near the beginning of the damage path and a house in Rowsburg was also heavily damaged by fallen trees. The barn appears to have been toppled from a combination of tornadic and straight line winds. Five livestock animals were killed in the barn collapse with several more injured. Many trees were downed along the damage path and large swaths of corn were flattened. The damage path from the tornado was no more than 15 yards wide but damage from the accompanying straight line downburst winds was more than a half mile in width at times. The damage path was a little over a mile in length. |
| July 2005 | Thunderstorm Wind | Jeromesville | $75,000 | Thunderstorm winds estimated at nearly 60 mph severely damaged a pole barn. Debris from the barn was spread out over an 80 yard area and also forced the closure of a road nearby. |
| June 2004 | Flash Flood | North Portion | $75,000 | Thunderstorms dumped one to three inches of rain on northern Ashland County during the evening of June 13th. Flooding was reported in many low lying areas. One person had to rescued near Nova after they drove their car into a flooded section of road. Many homes sustained damage from flooding. |
| July 2002 | Thunderstorm Wind | Countywide | $75,000 | Thunderstorm winds downed trees across the county. A small plane tied down at the Ashland County Airport was blown 65 feet, turned over and destroyed by wind gusts estimated at 65 mph. |
| August 1998 | Thunderstorm Wind | Loudonville | $75,000 | Severe thunderstorm winds downed trees, destroyed one garage and blew the roof off a barn. Another barn was blown down, killing some of the livestock inside. Crops were damaged. |
| June 1998 | Thunderstorm Wind | Countywide | $75,000 | Many trees and power lines were downed, with some trees downed on houses. Winds were estimated as gusting to 80 miles per hour. At Pleasant Valley Campground in Loudonville, trees were downed and campers were evacuated. |
| June 2023 | Tornado (EF0) | Nankin | $70,000 | This tornado was an EF0 with estimated peak winds of 85 mph. The tornado began northeast of Nankin, between County Road 801 and OH-58, where several trees were uprooted with snapped branches. As the tornado moved southeastward toward Township Road 713, one residence sustained damage to its roof and chicken coop, while the barn sustained partial roof removal. A separate residence near Township Road 713 and OH-302 suffered damage in the form of a garage door and walls pushed out, and insulation lofted into a nearby field before the tornado dissipated. |
| June 2020 | Thunderstorm Wind | Perrysville | $70,000 | Trained spotters and social media reports relayed numerous trees and large branches down with several cabins and cottages damaged at a campground northeast of Pleasant Hill Lake. Several wires and electrical lines were also downed. Another tree fell onto a house in Perrysville. |
| June 2013 | Flash Flood | Polk | $65,000 | State route 89 was flooded in half a dozen spots and was closed. Several roads in Ashland were closed. Some local roads were washed out with the pavement removed. |
| June 2019 | Flash Flood | Hayesville | $50,000 | County Road 1775 closed due to flowing water from Newell Run Creek near Montgomery Township. Minor road damage with pavement lifted. |
| November 2017 | Tornado (EF0) | Nova | $50,000 | An EF0 tornado touched down about a half mile west of Nova. The tornado knocked over or uprooted many trees along it's path. The tornado damaged the roof of a store on the west end of Nova. A farm supply store along the railroad tracks on the north end of the town lost a section of roofing. A nearby grain bin was also damaged. The tornado lifted just after crossing State Route 511. The damage path for this storm was just over a half mile in length. |
| November 2013 | Thunderstorm Wind | Ashland | $50,000 | Thunderstorm winds downed trees and limbs throughout Ashland County. |
| June 2013 | Thunderstorm Wind | Ashland | $50,000 | Thunderstorm winds downed trees throughout Ashland County. |
| July 2013 | Thunderstorm Wind | Redhaw | $50,000 | Thunderstorm winds downed several trees and flattened a barn. Corn in nearby fields was also flattened. |
| June 2011 | Hail | Loudonville | $50,000 | A supercell thunderstorm produced golf ball size hail. Numerous vehicles and homes sustained damage as a result of the large hail. |
| June 2008 | Thunderstorm Wind | Nova | $50,000 | Many trees were reported down. Several homes were damaged after trees fell onto them. |
| July 2003 | Thunderstorm Wind | Countywide | $50,000 | Thunderstorm winds downed several trees across northern Ashland County. |
| April 2000 | Lightning | Loudonville | $50,000 | Lightning struck a public school knocking out all of the transformers in the building. |
| October 1999 | Thunderstorm Wind | Ashland | $50,000 | Over a dozen large trees were downed, many of them on the campus of Ashland University. A tree fell on a house and adjacent garage. Branches from the tree punctured the roof of the house allowing heavy thunderstorm rains to seep inside. A second garage nearby also sustained major roof damage and a third house lost part of a back porch to the high winds. |
| November 1998 | Flash Flood | Countywide | $50,000 | Heavy thunderstorm rain caused flooding of basements. |
| June 1994 | Thunderstorm Wind | Countywide | $50,000 | Trees were downed, some on power lines, in numerous locations. |
| August 1994 | Thunderstorm Wind | Sullivan | $50,000 | Trees were downed, some on power lines, with at least one damaging a house. |
| January 1999 | Flash Flood | Countywide | $50,000 | no account filed |
| September 2018 | Thunderstorm Wind | Nankin | $45,000 | Thunderstorm wind gusts estimated to be at least 70 mph downed several trees north of Ashland between State Route 511 and County Road 1175. A home in that area lost a section of roofing and corn in nearby fields was blown over. |
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