NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Dennison, OH
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
8 tropical systems have passed within 75 miles of Dennison, Ohio since 1851, 0 of them at hurricane strength; the most recent was Sandy in 2012. Since 1950, 38 tornadoes have touched down within 25 miles, 1 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 8
- Tornadoes
- 38
- EF3 or stronger
- 1
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
2 deaths in all
What the records show for Dennison
None of the 8 tropical systems was at hurricane strength as it passed Dennison; the strongest was an unnamed storm in 1888, a tropical storm with 52 mph winds when its centre passed 73 miles away. The record near Dennison begins with an unnamed storm in 1888; the most recent system was Sandy in 2012, a tropical storm 72 miles away. Of the 8 systems, 2 have come since 2000. Dennison has more tropical storms and hurricanes within 75 miles than 97% of the 605 Ohio cities on this site. The strongest of the 38 tornadoes within 25 miles was an F3 on May 8, 1969; its path came within 10 miles, and it killed 1 person. Of the 38, 2 had paths within 5 miles of the city centre, and 20 have come since 2000. June has had the most tornadoes, 12. The most recent tornado was on June 5, 2025. Of the 605 Ohio cities, 88% have more tornadoes within 25 miles than Dennison. Hail has been reported within 10 miles 67 times since 1973, with stones up to 1.75 inches (golf ball size). Of the 605 Ohio cities, 54% have more hail reports within 10 miles than Dennison.
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Tropical storms and hurricanes near Dennison
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2012 | SandyOct 31 | 72 mi | Tropical storm (40 mph) | Category 3 |
| 2003 | IsabelSep 19 | 63 mi | Tropical storm (41 mph) | Category 5 |
| 1995 | OpalOct 6 | 42 mi | Tropical storm (46 mph) | Category 4 |
| 1989 | HugoSep 22 | 17 mi | Tropical storm (44 mph) | Category 5 |
| 1979 | FredericSep 14 | 60 mi | Tropical storm (40 mph) | Category 4 |
| 1957 | AudreyJun 29 | 73 mi | Tropical storm (46 mph) | Category 3 |
| 1915 | Unnamed 1915 stormOct 1 | 67 mi | Tropical storm (40 mph) | Category 4 |
| 1888 | Unnamed 1888 stormAug 21 | 73 mi | Tropical storm (52 mph) | Category 3 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Dennison: a hurricane's worst winds sit within a few dozen miles of its centre, and inland cities are usually past that.
Tornadoes within 25 miles of Dennison
By decade
- 2020s6
- 2010s8
- 2000s6
- 1990s1
- 1980s4
- 1970s4
- 1960s5(1 EF3+)
- 1950s4
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 8, 1969 | F3 | 10 mi | 2 mi | 1 / 14 |
| Sep 30, 1954 | F2 | 25 mi | 0.1 mi | 1 / 3 |
| Jul 29, 2021 | EF2 | 22 mi | 6.16 mi | 0 / 0 |
| Jul 29, 2021 | EF2 | 22 mi | 2.73 mi | 0 / 0 |
| Jun 22, 2006 | F2 | 25 mi | 6 mi | 0 / 0 |
| Nov 12, 2003 | F2 | 9 mi | 3.5 mi | 0 / 1 |
| May 23, 2000 | F2 | 13 mi | 3 mi | 0 / 0 |
| Jul 13, 1971 | F2 | 20 mi | 2 mi | 0 / 5 |
| Sep 26, 1970 | F2 | 21 mi | 0.1 mi | 0 / 0 |
| Jul 22, 1958 | F2 | 8 mi | 9.5 mi | 0 / 3 |
| Mar 11, 1955 | F2 | 14 mi | 3.3 mi | 0 / 1 |
| Jul 29, 2021 | EF1 | 23 mi | 2.17 mi | 0 / 0 |
The strongest 12 of 38, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Dennison
The Storm Prediction Center has 67 hail reports within 10 miles of Dennison since 1973, made on 42 separate days. Of these, 37 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.75 inches (golf ball size), was reported on 5 days, most recently August 12, 2023. The most recent report is from April 2, 2025. June has the most reports, 24.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Dennison
The nearest NOAA station with 1991–2020 climate normals is Dennison Wtr Wks, OH, 2 miles west of Dennison at 860 feet. July is the warmest, with an average high of 85°F and low of 61°F; January is the coolest, at 36°F and 20°F. June is the wettest at 4.4 inches of precipitation on average and February the driest at 2.5 inches; the year adds up to 42.3 inches over 87 days with at least a tenth of an inch. Highs reach 90°F on about 22 days a year, almost all from May to September. Lows fall below freezing on about 139 nights a year. That 42.3 inches is more than at 74 of the 129 Ohio stations used on this site (57%). New Philadelphia, 8 miles northwest, has its own station (New Philadelphia, OH): 42.3 inches a year, the same as here, and a July average high of 84°F against 85°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 36 | 20 | 3.1 | 6 |
| Feb | 40 | 21 | 2.5 | 6 |
| Mar | 50 | 28 | 3.5 | 8 |
| Apr | 63 | 38 | 3.9 | 9 |
| May | 73 | 48 | 3.8 | 9 |
| Jun | 81 | 57 | 4.4 | 9 |
| Jul | 85 | 61 | 4.1 | 7 |
| Aug | 83 | 59 | 4.1 | 7 |
| Sep | 77 | 52 | 3.4 | 6 |
| Oct | 64 | 41 | 3.3 | 7 |
| Nov | 51 | 32 | 3.1 | 7 |
| Dec | 41 | 25 | 3.1 | 7 |
| Year | 62 | 40 | 42.3 | 87 |
Averages for 1991–2020 at Dennison Wtr Wks, OH (860 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Dennison
Since 1996, the National Weather Service has logged 242 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Dennison: 189 thunderstorm wind reports, 36 flash floods and 17 floods. They killed 0 people and injured 4, and the NWS estimated $3.0 million in property and crop damage. The strongest thunderstorm gust on record here was 96 mph, on June 13, 2022. June has had the most flash floods, 15 of 36. Of the 597 Ohio cities on this site with a flash flood on record, 547 have had fewer than Dennison.
April 8, 1998: thunderstorm wind 9 miles from the centre of Dennison — 4 injured, $20,000 damage.
June 27, 1998: thunderstorm wind 1 mile from the centre of Dennison — $150,000 damage.
NWS: “A microburst occurred over the town, downing numerous trees and power lines. Several buildings also were damaged.”
April 9, 2015: flash flood 10 miles from the centre of Dennison — $150,000 damage.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Flood insurance policyholders in Dennison's ZIP code 44621 have filed 11 claims with the National Flood Insurance Program since 1978, and were paid $46,000 for buildings and contents, in the dollars of each year. 18% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 318 Ohio cities on this site with 10 or more claims, 9 have fewer than Dennison.
Tuscarawas County, which includes Dennison, has been named in 13 federal disaster or emergency declarations since 1969, 8 of them major disasters (by incident: 7 severe storms, 2 biological emergencies, 2 snowstorms, 1 hurricane). The latest major disaster declaration was Covid-19 Pandemic, on March 31, 2020. FEMA's National Risk Index gives Tuscarawas County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Moderate for hail, inland flooding, strong wind and lightning; Relatively Low for tornadoes and heat waves; Very Low for hurricanes. It models the county's expected loss from all 18 hazards it covers at $21.5 million a year, the 38th highest of 88 Ohio counties; of the hazards above, the largest share, $16.7 million (78%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Dennison
- Uhrichsville, OH3 mi
- Gnadenhutten, OH7 mi
- Sherrodsville, OH8 mi
- New Philadelphia, OH8 mi
- Mineral City, OH11 mi
- Scio, OH11 mi
- Dover, OH13 mi
- Freeport, OH15 mi
- Magnolia, OH16 mi
- Carrollton, OH16 mi
- Strasburg, OH17 mi
- Newcomerstown, OH17 mi
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