NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Delevan, NY
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
12 tropical systems have passed within 75 miles of Delevan, New York since 1851, 1 of them at hurricane strength; the most recent was Frances in 2004. Since 1950, 30 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 1
- Tropical storms
- 11
- Tornadoes
- 30
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Delevan
The strongest storm to pass near Delevan was Hazel in 1954, a Category 1 hurricane with 76 mph winds when its centre passed 22 miles away. The record near Delevan begins with an unnamed storm in 1876; the most recent system was Frances in 2004, a tropical storm 18 miles away. Of the 12 systems, one has come since 2000. Of the 809 New York cities on this site, 49% have more hurricanes within 75 miles than Delevan. The highest rating among the 30 tornadoes within 25 miles is F3, reached 3 times; the most recent, on August 19, 1970, came within 22 miles. Of the 30, one had a path within 5 miles of the city centre, and 12 have come since 2000. July has had the most tornadoes, 11. The most recent tornado was on June 9, 2025. Delevan has more tornadoes within 25 miles than 53% of the 809 New York cities. Hail has been reported within 10 miles 20 times since 1975, with stones up to 2 inches (hen egg size). Of the 809 New York cities, 82% have more hail reports within 10 miles than Delevan.
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Tropical storms and hurricanes near Delevan
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2004 | FrancesSep 9 | 18 mi | Tropical storm (39 mph) | Category 4 |
| 1995 | OpalOct 6 | 41 mi | Tropical storm (41 mph) | Category 4 |
| 1989 | HugoSep 23 | 45 mi | Tropical storm (41 mph) | Category 5 |
| 1972 | AgnesJun 23 | 70 mi | Tropical storm (52 mph) | Category 1 |
| 1955 | ConnieAug 13 | 58 mi | Tropical storm (52 mph) | Category 4 |
| 1954 | HazelOct 16 | 22 mi | Category 1 (76 mph) | Category 4 |
| 1928 | Unnamed 1928 stormSep 20 | 72 mi | Tropical storm (40 mph) | Category 5 |
| 1902 | Unnamed 1902 stormJun 29 | 47 mi | Tropical storm (40 mph) | Category 1 |
| 1896 | Unnamed 1896 stormSep 30 | 42 mi | Tropical storm (58 mph) | Category 3 |
| 1893 | Unnamed 1893 stormOct 14 | 43 mi | Tropical storm (69 mph) | Category 3 |
| 1878 | Unnamed 1878 stormSep 13 | 17 mi | Tropical storm (46 mph) | Category 2 |
| 1876 | Unnamed 1876 stormSep 18 | 48 mi | Tropical storm (47 mph) | Category 3 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Delevan: 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 Delevan
By decade
- 2020s4
- 2010s5
- 2000s3
- 1990s6
- 1980s1
- 1970s5(1 EF3+)
- 1960s6(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Aug 19, 1970 | F3 | 22 mi | 2.3 mi | 0 / 3 |
| Jun 20, 1969 | F3 | 16 mi | 84.1 mi | 0 / 0 |
| Jul 24, 1967 | F3 | 8 mi | 11.4 mi | 0 / 0 |
| Jul 10, 2024 | EF2 | 22 mi | 3.2 mi | 0 / 0 |
| Jul 28, 2022 | EF2 | 12 mi | 10 mi | 0 / 0 |
| Jul 20, 2017 | EF2 | 21 mi | 6.11 mi | 0 / 0 |
| Apr 28, 2002 | F2 | 21 mi | 6.5 mi | 0 / 0 |
| Jun 2, 1998 | F2 | 22 mi | 15 mi | 0 / 0 |
| May 2, 1972 | F2 | 18 mi | 12 mi | 0 / 0 |
| Aug 6, 1968 | F2 | 16 mi | 31.8 mi | 0 / 4 |
| Jun 9, 2025 | EF1 | 16 mi | 2.4 mi | 0 / 0 |
| Jul 10, 2024 | EF1 | 20 mi | 2.8 mi | 0 / 0 |
The strongest 12 of 30, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Delevan
The Storm Prediction Center has 20 hail reports within 10 miles of Delevan since 1975, made on 14 separate days. Of these, 11 were 1 inch across or larger, and one reached 2 inches. The largest, 2 inches (hen egg size), fell on May 28, 2017. The most recent report is from June 16, 2022. May and June have the most reports, 7 each.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Delevan
The nearest NOAA station with 1991–2020 climate normals is Franklinville, NY, 10 miles south of Delevan at 1,590 feet. July is the warmest, with an average high of 79°F and low of 56°F; January is the coolest, at 31°F and 14°F. July is the wettest at 4.6 inches of precipitation on average and February the driest at 2.5 inches; the year adds up to 44.7 inches over 106 days with at least a tenth of an inch. June to November, the hurricane season months, bring 56% of the year's precipitation (25.0 of 44.7 inches); the other six months are drier. September has brought the most of the 12 tropical systems that passed within 75 miles (6); a normal September there has highs of 71°F and 4.3 inches of precipitation. Highs reach 90°F on about 1 days a year. Lows fall below freezing on about 169 nights a year. Snowfall averages 108.6 inches a year, most of it in January. That 44.7 inches is more than at 80 of the 137 New York stations used on this site (58%). Chaffee, 6 miles north, has its own station (Colden 1W, NY): 53.2 inches a year, 8.5 more than here, and a July average high of 77°F against 79°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 31 | 14 | 3.3 | 10 | 29.8 |
| Feb | 33 | 13 | 2.5 | 8 | 21.5 |
| Mar | 41 | 20 | 3.0 | 8 | 17.1 |
| Apr | 55 | 32 | 3.5 | 9 | 3.9 |
| May | 67 | 43 | 3.8 | 8 | 0.0 |
| Jun | 75 | 52 | 4.1 | 9 | 0.0 |
| Jul | 79 | 56 | 4.6 | 9 | 0.0 |
| Aug | 78 | 55 | 4.0 | 8 | 0.0 |
| Sep | 71 | 48 | 4.3 | 9 | 0.0 |
| Oct | 59 | 38 | 4.3 | 10 | 0.5 |
| Nov | 47 | 29 | 3.7 | 9 | 11.9 |
| Dec | 36 | 21 | 3.6 | 10 | 23.9 |
| Year | 56 | 35 | 44.7 | 106 | 108.6 |
Averages for 1991–2020 at Franklinville, NY (1,590 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 Delevan
Since 1996, the National Weather Service has logged 125 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Delevan: 115 thunderstorm wind reports, 7 flash floods and 3 heavy rain events. None is recorded as killing or injuring anyone; the NWS estimated $1.4 million in property and crop damage. The strongest thunderstorm gust on record here was 85 mph, on July 24, 2010. August has had the most flash floods, 3 of 7. Of the 798 New York cities on this site with a flash flood on record, 95 have had fewer than Delevan.
August 9, 2009: flash flood 4 miles from the centre of Delevan — $100,000 damage.
July 24, 2010: thunderstorm wind 4 miles from the centre of Delevan — $100,000 damage.
NWS: “An aerial survey flown by the New York State police confirmed straighline winds from a microburst.”
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
Cattaraugus County, which includes Delevan, has been named in 26 federal disaster or emergency declarations since 1967, 15 of them major disasters (by incident: 7 severe storms, 7 snowstorms, 3 floods, 2 biological emergencies). The latest major disaster declaration was Covid-19 Pandemic, on March 20, 2020. FEMA's National Risk Index gives Cattaraugus County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for lightning; Relatively Moderate for tornadoes, inland flooding and strong wind; Relatively Low for hurricanes; Very Low for hail and heat waves. It models the county's expected loss from all 18 hazards it covers at $33.8 million a year, the 26th highest of 62 New York counties; of the hazards above, the largest share, $28.7 million (85%), 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 Delevan
- Chaffee, NY6 mi
- Arcade, NY8 mi
- Franklinville, NY10 mi
- Springville, NY11 mi
- Holland, NY12 mi
- Houghton, NY15 mi
- South Wales, NY17 mi
- Boston, NY17 mi
- West Falls, NY18 mi
- Hinsdale, NY19 mi
- Fillmore, NY19 mi
- Cuba, NY20 mi
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