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Knox storm history

Storm events recorded in Knox, Ohio between 1950 and 2025.

449
Total events
13
Tornadoes
76
Hail
30
Floods
1
Deaths
$791.6M
Property damage

Most significant events

Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.

July 29, 2002 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind1 death, 4 injuries
Thunderstorm winds downed many trees near Apple Valley Lake in northeastern Knox County. A vehicle travelling on U.S. 36 just west of Howard was struck by a falling tree. A two year old female inside the car was killed and four other occupants were seriously injured.
April 3, 1982 · Knox, Ohio
Tornado F2 Tornado9 injuries
June 29, 2012 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind$1.4M damage
An intense line of thunderstorms or Derecho moved across Knox County during the late afternoon of June 29th causing extensive damage. Winds were estimated to be as much as 65 mph. Over 50 percent of residents lost power during this event. Power was not completely restored for sev…
September 14, 2008 · Knox, Ohio
High Wind High Wind$4.0M damage
High winds associated with the remnants of Hurricane Ike began late in the afternoon of September 14th and then continued through much of the evening. Wind gusts were estimated to be as much as 70 mph. Damage in the county was extensive with thousands of trees and many utility po…
March 7, 2008 · Knox, Ohio
Winter Storm Winter Storm$750.0M damage
Snow developed during the morning hours of the 7th, and continued for the next day and a half. Intensity varied through the day on the 7th, but during the evening hours the snow became rather light for a period of time. However, the snow intensified through the overnight and into…
July 10, 2006 · Knox, Ohio
Flash Flood Flash Flood$3.5M damage
Heavy thunderstorm rains fell on the northeastern corner of Knox County during the afternoon and early evening hours of July 10th. 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. …
January 5, 2005 · Knox, Ohio
Ice Storm Ice Storm$6.8M damage
December 22, 2004 · Knox, Ohio
Winter Storm Winter Storm$5.4M damage
June 27, 1998 · Knox, Ohio
Flash Flood Flash Flood$3.0M damage
Continuing heavy thunderstorm rains brought major flooding, which continued in many areas through the day. Approximately one hundred people were evacuated from their homes. A number of people were trapped by the rising flood waters in vehicles and buildings and had to be rescued.…
June 27, 1998 · Knox, Ohio
Flash Flood Flash Flood$3.0M damage
Another round of thunderstorms with torrential rains produced additional flooding and contributed to ongoing flooding. Many roads were closed or remained closed. Forty families had to be evacuated from their homes. Before the thunderstorms moved away 10 inches or more of rainfall…
June 26, 2025 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Two trees downed near the intersection of Boynton Street and Gambier Road in Mount Vernon.
June 25, 2025 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees downed in Millwood.
May 16, 2025 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Large trees downed in Gambier.
May 5, 2025 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed in Mount Vernon.
May 2, 2025 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Barn roof blown-off about five-miles NNW of Fredericktown.
May 2, 2025 · Knox, Ohio
Hail Hail
Hail up to half dollar-size along Treaty Road, about one-mile NNW of North Liberty.
August 17, 2024 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees downed or snapped about two-miles SSE of Bladensburg.
August 17, 2024 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees damaged about two-miles southeast of Martinsburg.
June 5, 2024 · Knox, Ohio
Tornado EF0 Tornado
An EF0 tornado with estimated peak winds of 80 mph formed near County Road 26, south of Sycamore Road in Knox County, where it damaged a large outbuilding and tree limbs. The tornado tracked east-northeastward, caused sporadic tree damage, and removed shingles and siding from res…
June 5, 2024 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Multiple trees downed and minor damage to barn along Grove Church Road, between Lee Wolfe Road and OH Route 229, about three-miles southeast of Gambier.
June 5, 2024 · Knox, Ohio
Flash Flood Flash Flood
Numerous roads will water flowing over them in Mount Vernon, Gambier, and eastern portions of Knox County. Radar estimated 2 to 2.75 inches of rainfall in a 90-120 minute period.
March 30, 2024 · Knox, Ohio
Hail Hail
Hail up to nickel-size on southeast side of Mount Vernon.
March 30, 2024 · Knox, Ohio
Hail Hail
Hail up to quarter-size about 1-mile northwest of downtown Mount Vernon.
February 16, 2024 · Knox, Ohio
Winter Storm Winter Storm
Developing low pressure moved across the Ohio Valley on February 16th, with a large area of generally light to moderate snow evolving north of the system. A narrow band of heavy snow with snow rates of up to 2 inches per hour evolved within the larger area of lighter snow across …
July 23, 2023 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Multiple tree limbs downed about 2.7-miles ENE of Centerburg and tree downed near intersection of Pleasant Valley Road and Keys Road, about 4-miles WSW of Mount Vernon.
July 20, 2023 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Several trees downed in Brandon.
April 1, 2023 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed in Fredericktown.
April 1, 2023 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed in Mount Vernon.
December 23, 2022 · Knox, Ohio
Winter Storm Winter Storm
An Arctic cold front swept through the area shortly before midnight December 23rd. Low pressure along this front tracked over Lake Erie early in the morning on December 23rd and rapidly intensified through the day while slowly lifting northeast across Ontario. With the frontal pa…
December 23, 2022 · Knox, Ohio
Extreme Cold/Wind Chill Extreme Cold/Wind Chill
Wind chills plunged below 0 by 5 AM December 23rd and did not rise above 0 until late in the evening on December 25th. A wind chill of -35F was recorded at 9:55 AM December 23rd at the Knox County Airport.
July 23, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees downed in Mount Vernon.
July 23, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees downed in Fredericktown.
July 23, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Trees downed in Martinsburg.
June 16, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed in Mount Vernon.
June 16, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed in Danville.
June 14, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
NWS storm damage survey concluded a downburst with peak gusts of 80 mph downed numerous trees in Fredericktown.
June 13, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Several trees snapped or uprooted in Fredericktown. One of these trees damaged a fence.
June 13, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees downed along OH-3. This damage occurred near the Knox/Ashland County line and near Rainbow Springs Family Campground, about three-miles northeast of Jelloway.
June 13, 2022 · Knox, Ohio
Tornado EF1 Tornado
As the tornado continued moving southeastward, trees and power poles were damaged along the tornado's path in Green Valley. A detached garage was destroyed with cinderblocks thrown about 20 yards into a nearby field. In addition, a barn was destroyed and farm equipment was displa…
June 8, 2022 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Two trees were downed in Mount Vernon, one of which fell onto a house and entered the living room. Extent of damage unknown and no pictures were provided.
February 3, 2022 · Knox, Ohio
Winter Storm Winter Storm
A prolonged winter storm occurred February 3rd and 4th, 2022 as multiple waves of low pressure tracked along a slow moving cold front. Rain changed to a mix of mainly sleet and some freezing rain during the early morning hours of February 3rd as temperatures fell below freezing. …
August 11, 2021 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines downed in Fredericktown.
August 11, 2021 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines downed in Mount Vernon.
August 11, 2021 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines downed in Danville.
February 15, 2021 · Knox, Ohio
Winter Storm Winter Storm
Two rounds of snow moved through northern Ohio on February 15 and 16. The first round on the morning of the 15th brought a quick inch or two of snow to the region. A more impressive second round of snow entered during the afternoon and evening hours, bringing snowfall rates in ex…
December 24, 2020 · Knox, Ohio
Winter Storm Winter Storm
Snow quickly entered Central Ohio during the late afternoon hours on the 24th. By evening, snowfall rates increased to one inch per hour or higher as more organized snow bands moved through the region on the northwest side of the low pressure system and visibility dropped to a ha…
November 15, 2020 · Knox, Ohio
High Wind High Wind
The Mount Vernon Airport ASOS recorded a peak non-thunderstorm wind gust of 68 mph.
September 7, 2020 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Multiple trees uprooted or snapped in Mount Vernon.
June 26, 2020 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
Tree down at intersection of Beckholt and Grove Church Roads north of Martinsburg. Another tree was downed onto a house and car in Bladensburg.
June 26, 2020 · Knox, Ohio
Thunderstorm Wind Thunderstorm Wind
A manhole cover was blown off at the intersection of Sandusky and Vine Streets in downtown Mount Vernon. On the south side of Mount Vernon, multiple trees were down along Newark Road at Ames Street and Dixie Drive.

Events by year

YearEventsTornadoes
202560
202481
202340
2022131
202140
2020130
2019180
201820
201790
201620
201550
201480
2013200
2012150
2011120
2010140
200970
2008170
2007130
2006151
2005120
2004250
2003190
2002270
2001120
2000131
1999160
1998311
1997160
1996170
1995140
199460
199320
199220
199110
199041
198810
198710
198610
198510
198330
198232
198132
198020
197710
197420
197032
196820
196610
196310
196110
195711