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NOAA/NWS STORM PREDICTION CENTER REPORTS + U.S. CENSUS DATA

Hail, Wind & Tornado Reports in Knox County, OH

Public hail, wind, and tornado reports across Knox County, OH from June 11, 1957 through July 18, 2026, sourced from NOAA/NWS Local Storm Reports and SPC storm report data.

Example: 43050 — search hail, wind and tornado public reports for any U.S. ZIP code 
Hail Reports
79
Wind Reports
261
Tornado Reports
13
Max Hail Size
1.75″
Source  NOAA SPC · NWS Local Storm Reports Coverage  Knox County, OH · 1957–present Updated  Daily · last Jul 18, 2026

Latest NWS Hail Reports in Knox County

30 reports
Free hail report for your home →
1.00″ hail
Mar 27, 2026
1:04 AM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 3 S Butler, OH
1.00″ hail
Mar 23, 2026
1:40 AM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Mount Vernon, OH
1.00″ hail
Mar 23, 2026
12:44 AM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: Mount Vernon, OH
1.00″ hail
Mar 23, 2026
12:42 AM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 5 E Sparta, OH
1.25″ hail
May 2, 2025
6:40 PM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Picture of 1.25 inch hail received on social media. Time estimated via radar.
NWS Hail Report Location: 3 S Butler, OH
1.00″ hail
Mar 30, 2024
9:33 PM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: mPING report of quarter sized hail.
NWS Hail Report Location: 2 NW Mount Vernon, OH
1.00″ hail
Jun 2, 2019
5:51 AM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: No National Weather Service description provided.
NWS Hail Report Location: 4 N Fredericktown, OH
1.00″ hail
Aug 19, 2017
7:07 PM UTC
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: KENYON COLLEGE POLICE REPORTED QUARTER-SIZED HAIL AND BRIEF HEAVY RAINFALL.
NWS Hail Report Location: Gambier, OH
0.88″ hail
May 28, 2014
12:45 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Nickel sized hail was observed.
NWS Hail Report Location: N Danville, OH
1.00″ hail
May 28, 2014
12:15 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Quarter sized hail was observed.
NWS Hail Report Location: 7 E Gambier, OH
1.00″ hail
May 14, 2014
1:25 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Quarter sized hail was observed.
NWS Hail Report Location: N Howard, OH
0.75″ hail
Jul 10, 2013
3:05 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Penny sized hail was observed.
NWS Hail Report Location: 3 NW Mt Vernon, OH
1.25″ hail
Jun 12, 2013
8:58 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Half dollar sized hail was observed.
NWS Hail Report Location: N Mt Vernon, OH
0.75″ hail
Jun 12, 2013
8:50 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Penny sized hail was observed.
NWS Hail Report Location: N Mt Vernon, OH
0.75″ hail
May 10, 2013
1:10 PM EST-5
Hail report for Knox County, OH
Knox County · 21,624 Homes in County
Hail Report Description: Penny sized hail was observed.
NWS Hail Report Location: 3 SW Fredericktown, OH
Showing 15 of 30
Hail Damage Risk for Your Home +

Hail reports describe hail by diameter, often comparing stone size to familiar objects like peas, quarters, golf balls, and softballs. Use this guide as a starting point for possible hail damage to your roof, siding, gutters, vents, windows, and exterior. Actual hail damage depends on hail hardness, density, wind speed, impact angle, roof age, shingle condition, roof pitch, roofing material, installation quality, and prior storm damage.

Pea
0.25″
Low

Usually too small to cause hail damage to most sound asphalt roofs, siding, or gutters.

Mothball
0.50″
Sub-Severe Watch

Below the NWS severe-hail threshold, but not always harmless. Repeated small hail can scuff surfaces, wear aging shingles, and loosen protective granules over time.

Penny
0.75″
Minor / Watch

Below the NWS severe-hail threshold, but roof hail damage is still possible on older, brittle, poorly installed, or previously damaged shingles. May also mark screens, vents, gutters, and soft metal.

Nickel
0.88″
Minor / Watch

Still below the severe-hail threshold, but large enough to leave visible marks on soft metal and add wear to older or hail-weakened roof shingles.

Quarter
1.00″
Watch

The NWS severe-hail threshold. Quarter-size hail can bruise shingles, dent soft metal, and create roof hail damage worth checking.

Half Dollar
1.25″
Watch

More likely to dent gutters, vents, flashing, and siding. Hail damage risk rises quickly on older roofs or hail-weakened shingles.

Ping Pong / Walnut
1.50″
Likely

Hail damage becomes more likely, including bruised shingles, granule loss, dented siding, and damaged roof vents.

Golf Ball
1.75″
Likely

Often causes roof hail damage, cracked shingles, dented gutters, damaged flashing, and siding impacts. A roof inspection is recommended.

Hen Egg
2.00″
Serious

Can crack or puncture shingles, expose mat, dent siding, and cause widespread hail damage across the roof and exterior.

Tennis Ball
2.50″
Serious

Can cause heavy roof hail damage, punctured siding, broken skylights, damaged vents, and widespread exterior damage.

Baseball
2.75″
Major

Major hail damage is likely, including severe roof impacts, damaged siding, broken windows, and possible major roof repairs.

Tea Cup / Large Apple
3.00″
Major

Can cause heavy hail damage across the roof, siding, gutters, windows, and exterior. Significant repairs are often needed.

Softball
4.00″
Extreme

Destructive hail damage. Can severely damage roofing materials, siding, windows, gutters, vents, vehicles, and exterior surfaces.

Grapefruit
4.50″
Extreme

Catastrophic hail damage risk for roofs, windows, vehicles, siding, gutters, and exterior surfaces.

Source: NOAA / National Weather Service hail size references are used for hail-size comparisons and the 1.00″ severe-hail threshold. Damage descriptions are general homeowner guidance, not official NOAA/NWS damage ratings. Sub-severe hail under 1.00″ is below the severe threshold, but that does not mean “no roof damage.” Penny- to nickel-size hail can still contribute to granule loss, cosmetic surface marks, and added wear, especially on older, brittle, poorly installed, or previously damaged roofs.

Latest NWS Wind Reports in Knox County

30 reports
Free hail report + wind check →
UNK mph
Jul 18, 2026
10:00 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Knox County Sheriff Dispatch reported a tree down at North Liberty Road and Proper Road. Time estimated via radar.
NWS Wind Report Location: 5 Nne Mount Vernon, OH
UNK mph
Jul 18, 2026
9:59 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Knox County Sheriff Dispatch reported a tree down at Hyatt Road and Z Street. Time estimated via radar.
NWS Wind Report Location: 2 Se Fredericktown, OH
UNK mph
Jun 6, 2026
4:17 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Extensive roof damage to a building along with surrounding tree damage with limbs down. Time estimated via radar.
NWS Wind Report Location: 2 ENE Mount Vernon, OH
UNK mph
Jun 6, 2026
4:08 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Large Tree and power lines down on State Route 13 between Mount Vernon and Green Valley.
NWS Wind Report Location: 3 NW Mount Vernon, OH
UNK mph
Mar 27, 2026
1:04 AM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: A few calls for downed trees and powerlines in the Mt Vernon area.
NWS Wind Report Location: Mount Vernon, OH
UNK mph
Mar 27, 2026
1:02 AM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Sporadic trees down across Knox County. Most of the down trees were observed in Fredericktown and Mount Vernon. Time estimated via radar.
NWS Wind Report Location: 3 SSE Fredericktown, OH
UNK mph
Mar 27, 2026
12:56 AM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Tree downed on a house near Fredericktown.
NWS Wind Report Location: Fredericktown, OH
UNK mph
Jun 26, 2025
8:15 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: tree down near intersection of Gambier St/Boyton St. Time estimated via radar.
NWS Wind Report Location: Mount Vernon, OH
UNK mph
Jun 25, 2025
7:20 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Several reports of downed trees in powerlines in the eastern and northeastern portions of Knox County.
NWS Wind Report Location: 3 SSW Danville, OH
UNK mph
Jun 19, 2025
12:25 AM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Tree down across route 3.
NWS Wind Report Location: 5 NE Centerburg, OH
UNK mph
May 18, 2025
2:32 AM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Large trees downed at Kenyon College apartments.
NWS Wind Report Location: Gambier, OH
UNK mph
May 5, 2025
9:59 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Knox County 911 Dispatch received reports of numerous trees down in the city of Mount Vernon.
NWS Wind Report Location: 1 SSW Mount Vernon, OH
UNK mph
May 2, 2025
6:28 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Barn roof blown off. Time estimated via radar.
NWS Wind Report Location: 5 N Fredericktown, OH
UNK mph
May 2, 2025
6:25 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Tree downed along OH 546.
NWS Wind Report Location: 5 N Fredericktown, OH
UNK mph
Apr 29, 2025
7:15 PM UTC
Wind report for Knox County, OH
Knox County · 21,624 Homes in County
Wind Report Description: Trees and wires reported downed.
NWS Wind Report Location: Martinsburg, OH
Showing 15 of 30
Wind Damage Risk for Your Home +

Storm reports list thunderstorm wind gusts in mph. The NWS marks storms as severe at 58+ mph, but wind damage to your home depends on roof age, shingle condition, installation, exposure, nearby trees, and prior hail or wind damage.

Below Severe
Under 58 mph
Minor

Usually little damage to a sound roof, but loose shingles, flashing, or debris may shift.

Severe
58–74 mph
Watch

Can loosen shingles, lift flashing, break limbs, and damage gutters, siding, fences, or trim.

Damaging
75–90 mph
Serious

Can peel shingles, damage vents, tear siding, rip gutters, and expose weak roof areas.

Extreme
90+ mph
Major

Can cause major roof covering loss, tree damage, broken windows, and structural damage.

Source: NOAA / National Weather Service storm reports. Gusts may be measured or estimated; actual wind damage varies by roof condition, exposure, and prior hail or wind damage.

Latest NWS Tornado Reports in Knox County

13 reports
UNK category
Mar 27, 2026
12:56 AM UTC
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: A brief EF-0 tornado with maximum wind speeds of 75 mph and a maximum width of 20 yards began just west of Granny Creek road southwest of Fredricktown. The tornado ripped off part of a metal roof of a barn and carried it southeast... with debris scattered across a field on the east side of the road.
NWS Tornado Report Location: 4 SW Fredericktown, OH
UNK category
Jun 6, 2024
12:44 AM UTC
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: NWS storm damage survey determined an EF0 tornado with estimated peak winds of 85 mph impacted the Brandon area. Damage path length is about 3 miles and maximum path width is 80 yards. This LSR denotes the start point of the tornado.
NWS Tornado Report Location: 7 E Centerburg, OH
F0 category
Aug 3, 2006
3:25 PM EST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: A F0 tornado touched down briefly on the west side of Mt. Vernon during the afternoon hours of August 3rd. The tornado touched down along Harcourt Road (State Route 3) around 4:25 pm and damaged four businesses. A lumber yard on the west side of the road saw the most significant damage. A pole building used for storing lumber and supplies was destroyed. Most of the materials inside the building were also destroyed. Over a dozen vehicles at an automobile dealership across the street were damaged by flying debris. One employee at the dealership sustained minor injuries from the flying debris. Damage at the dealership was estimated to be at least $100,000. Two other businesses in the area sustained lesser damages. The tornado appeared to be on the ground for a couple hundred feet and had a damage path no more than 50 feet in width.
NWS Tornado Report Location: Mt Vernon, OH
F1 category
Sep 20, 2000
7:51 PM EST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: A tornado moved through the very southern part of Knox County. The damage path was nearly 10 miles in length, ranged from 50 to 100 yards in width and moved through Miller and Morgan Townships. The tornado lifted in Morgan Township just east of Morgan Center Road after downing many large trees and flattening sections of several large corn fields. Minor damage occurred to four homes and a barn was destroyed. A small storage shed was also damaged and several dozen trees and power poles were downed.
NWS Tornado Report Location: Mt Vernon, OH
F0 category
Jun 27, 1998
6:15 PM EST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: A tornado touched down south of Danville and remained on the ground for a short time. Numerous trees were downed.
NWS Tornado Report Location: Danville, OH
F0 category
Jul 9, 1990
5:30 PM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F2 category
Apr 3, 1982
4:55 AM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F2 category
Mar 31, 1982
11:50 AM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F0 category
Jun 21, 1981
12:15 PM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F2 category
Jun 8, 1981
7:45 PM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F0 category
Sep 3, 1970
7:15 PM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F2 category
Apr 2, 1970
7:35 AM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
F2 category
Jun 11, 1957
3:20 PM CST
Tornado report for Knox County, OH
Knox County · 21,624 Homes in County
Tornado Report Description: No National Weather Service description provided.
NWS Tornado Report Location: Not provided, OH
Showing 13 of 13
Tornado Damage Risk for Your Home +

After a tornado, the National Weather Service assigns an EF rating from EF0 to EF5 based on surveyed damage. The rating estimates wind speed from what the tornado damaged, so actual damage can vary by construction quality, roof age, garage doors, windows, trees, debris, and how close the home was to the tornado path.

EF0
65–85 mph
Light

Can peel shingles, damage gutters or siding, break tree limbs, and toss loose outdoor items.

EF1
86–110 mph
Moderate

Can strip roof covering, damage exterior doors, break windows, snap trees, and cause heavier siding or gutter damage.

EF2
111–135 mph
Serious

Can tear off large sections of roofing, break or uproot trees, destroy weaker structures, and cause major exterior damage.

EF3–EF5
136+ mph
Severe

Can remove roofs and walls, destroy large portions of homes, toss vehicles, and cause severe to total destruction near the path.

Source: NOAA / National Weather Service. EF ratings are assigned after a post-storm damage survey and are based on observed damage, not a direct measurement at every home.

NWS Hail, Wind and Tornado Reports in Knox County on the Interactive Map

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Browse Cities with NWS Storm Reports in Knox County

NWS Storm Reports & Census Data

U.S. Census Data · County

Knox County, OH area census snapshot

People & households
Population62,888
Households23,435
Housing units26,038
Income
Median household income$73,988
$100k+ households43.4%
$150k+ households15.7%
Housing stock
Single-family detached21,624
Attached single-family451
Small multifamily2,705
Large multifamily386
Mobile homes872
Housing mix
Single-family share83.1%
Attached-home share1.7%
Multifamily share11.9%
Mobile-home share3.4%
Ownership & occupancy
Owner-occupied17,588
Renter-occupied5,847
Vacant units2,603
Home value & age
Median home value$218,300
Owner homes $300k+28.3%
Owner homes $500k+8.6%
Owner homes $750k+2.7%
Median year built1972
Older-home share59.3%
Vehicle context
Households with cars21,858
Free hail maps

This snapshot is for local area context only and describes the selected state, county, city, or ZIP area — not a specific home or property. For ZIP-level estimated hail impact, use Free Hail Maps to generate a hail report with key impact details for that ZIP.

Top ZIP Codes with NWS Storm Reports in Knox County

Get a Remote Hail Inspection

Not sure if hail may have affected your home in Knox County? Ask a local pro for a Remote Hail Inspection. They can review hail activity for your property and help you decide whether an in-person roof or exterior inspection makes sense.

Frequently asked questions

for homeowners, buyers & sellers
How many hail, wind, and tornado reports does Knox County have on record?

Our records show 79 hail, 261 wind, and 13 tornado reports in Knox County, compiled from NOAA SPC and NWS Local Storm Reports. The most recent was reported on July 18, 2026.

What is the largest hail ever reported in Knox County?

The largest hail size in these storm-report records in Knox County is 1.75″. It was reported near Monroe Mills, OH on August 9, 2012.

A storm report showed up near my home in Knox County — does that mean my roof is damaged?

Not necessarily. A storm report only means hail, wind, or a tornado was observed nearby; it does not confirm damage at any specific address, and conditions change from block to block. Check an address-level hail report first, and if it looks significant, find a local pro that serves Knox County and ask about a Remote Hail Inspection before anyone climbs on the roof.

I am buying a home in Knox County — why should I look at its storm history?

Recent hail or wind can leave a roof or exterior with damage that is easy to miss during a walkthrough, and a recent roof replacement is sometimes an insurance job after a storm. Reviewing the storm history for a Knox County address before closing helps you ask informed questions about roof age, past repairs, and any prior claims.

I am selling a home in Knox County — how does this help me?

Knowing the storm history for your address lets you answer buyer questions with confidence, document repairs you have already made, and decide whether a pre-listing roof check is worthwhile. A clear hail history removes a common sticking point during negotiations.

How do I check hail history for a specific Knox County address?

Use the address search to pull a free address-level hail report for any property in Knox County — no phone number or email required. It shows recent hail activity for that address so you know whether a closer roof or exterior review makes sense.

Where does this storm report data come from, and what are its limits?

Storm reports on this page are public reports from storm events across Knox County, OH, sourced from NOAA SPC and NWS Local Storm Reports. They show where hail, wind, or tornado activity was reported in Knox County, but they do not confirm damage at any specific property. Report locations, sizes, and times may be approximate and can vary from what an individual home experienced. For property-specific hail history, use an address-level hail report or contact a participating local professional for a remote hail inspection. Pros inclusion is not an endorsement, and contacting a professional does not confirm damage at any property.

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