NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Harmony, PA
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
10 tropical systems have passed within 75 miles of Harmony, Pennsylvania since 1851, 0 of them at hurricane strength; the most recent was Sandy in 2012. Since 1950, 68 tornadoes have touched down within 25 miles, 2 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 10
- Tornadoes
- 68
- EF3 or stronger
- 2
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
9 deaths in all
What the records show for Harmony
None of the 10 tropical systems was at hurricane strength as it passed Harmony; the strongest was an unnamed storm in 1896, a tropical storm with 62 mph winds when its centre passed 71 miles away. The record near Harmony begins with an unnamed storm in 1878; the most recent system was Sandy in 2012, a tropical storm 7 miles away. Of the 10 systems, 2 have come since 2000. Of the 794 Pennsylvania cities on this site, 73% have more tropical storms and hurricanes within 75 miles than Harmony. The strongest of the 68 tornadoes within 25 miles was an F4 on June 3, 1980; its path came within 24 miles. The deadliest, an F3 on May 31, 1985, killed 9 people. Of the 68, 6 had paths within 5 miles of the city centre, and 25 have come since 2000. July has had the most tornadoes, 20. The most recent tornado was on May 21, 2025. Harmony has more tornadoes within 25 miles than 62% of the 794 Pennsylvania cities. Hail has been reported within 10 miles 83 times since 1956, with stones up to 4.5 inches (grapefruit size). Harmony has more hail reports within 10 miles than 78% of the 794 Pennsylvania cities.
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Tropical storms and hurricanes near Harmony
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2012 | SandyOct 31 | 7 mi | Tropical storm (40 mph) | Category 3 |
| 2003 | IsabelSep 19 | 6 mi | Tropical storm (41 mph) | Category 5 |
| 1995 | OpalOct 6 | 69 mi | Tropical storm (46 mph) | Category 4 |
| 1989 | HugoSep 22 | 33 mi | Tropical storm (43 mph) | Category 5 |
| 1979 | FredericSep 14 | 43 mi | Tropical storm (39 mph) | Category 4 |
| 1928 | Unnamed 1928 stormSep 20 | 73 mi | Tropical storm (41 mph) | Category 5 |
| 1915 | Unnamed 1915 stormOct 1 | 46 mi | Tropical storm (40 mph) | Category 4 |
| 1902 | Unnamed 1902 stormJun 29 | 58 mi | Tropical storm (40 mph) | Category 1 |
| 1896 | Unnamed 1896 stormSep 30 | 71 mi | Tropical storm (62 mph) | Category 3 |
| 1878 | Unnamed 1878 stormSep 13 | 53 mi | Tropical storm (49 mph) | Category 2 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Harmony: 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 Harmony
By decade
- 2020s15
- 2010s6
- 2000s4
- 1990s15
- 1980s12(2 EF3+)
- 1970s11
- 1960s2
- 1950s3
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 3, 1980 | F4 | 24 mi | 11.8 mi | 0 / 140 |
| May 31, 1985 | F3 | 3 mi | 39 mi | 9 / 120 |
| Aug 8, 1992 | F2 | 21 mi | 2 mi | 0 / 0 |
| Oct 3, 1986 | F2 | 21 mi | 9 mi | 0 / 0 |
| May 31, 1985 | F2 | 24 mi | 15 mi | 0 / 20 |
| Jul 20, 1981 | F2 | 7 mi | 0.1 mi | 0 / 0 |
| Apr 28, 1981 | F2 | 22 mi | 0.5 mi | 0 / 0 |
| Sep 24, 1977 | F2 | 17 mi | 0.1 mi | 0 / 0 |
| Jun 4, 1975 | F2 | 17 mi | 45.3 mi | 0 / 0 |
| Jul 24, 1967 | F2 | 22 mi | 6.5 mi | 0 / 2 |
| May 12, 1956 | F2 | 16 mi | 0.1 mi | 0 / 0 |
| Jun 10, 1954 | F2 | 4 mi | 7.3 mi | 0 / 3 |
The strongest 12 of 68, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Harmony
The Storm Prediction Center has 83 hail reports within 10 miles of Harmony since 1956, made on 51 separate days. Of these, 47 were 1 inch across or larger, and 2 reached 2 inches. The largest, 4.5 inches (grapefruit size), fell on July 26, 1956. The most recent report is from April 19, 2025. April has the most reports, 19.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Harmony
The nearest NOAA station with 1991–2020 climate normals is Butler 2 SW, PA, 11 miles east of Harmony at 1,000 feet. July is the warmest, with an average high of 82°F and low of 58°F; January is the coolest, at 34°F and 17°F. June is the wettest at 4.3 inches of precipitation on average and February the driest at 2.7 inches; the year adds up to 43.3 inches over 90 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (23.2 of 43.3 inches); the other six months are drier. September has brought the most of the 10 tropical systems that passed within 75 miles (6); a normal September there has highs of 74°F and 4.1 inches of precipitation. Highs reach 90°F on about 7 days a year, almost all from July to August. Lows fall below freezing on about 140 nights a year. Snowfall averages 34.9 inches a year, most of it in January. That 43.3 inches is more than at 53 of the 148 Pennsylvania stations used on this site (36%). Ellwood City, 8 miles west, has its own station (New Castle 1 N, PA): 42.0 inches a year, 1.3 less than here, and a July average high of 86°F against 82°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 34 | 17 | 3.4 | 8 | 11.3 |
| Feb | 37 | 18 | 2.7 | 7 | 9.7 |
| Mar | 46 | 25 | 3.3 | 8 | 5.3 |
| Apr | 60 | 35 | 3.5 | 8 | 0.6 |
| May | 70 | 45 | 3.8 | 8 | 0.0 |
| Jun | 78 | 54 | 4.3 | 8 | 0.0 |
| Jul | 82 | 58 | 4.2 | 8 | 0.0 |
| Aug | 81 | 57 | 4.0 | 7 | 0.0 |
| Sep | 74 | 50 | 4.1 | 7 | 0.0 |
| Oct | 62 | 39 | 3.3 | 8 | 0.1 |
| Nov | 50 | 30 | 3.3 | 7 | 1.1 |
| Dec | 39 | 23 | 3.4 | 8 | 6.8 |
| Year | 59 | 38 | 43.3 | 90 | 34.9 |
Averages for 1991–2020 at Butler 2 SW, PA (1,000 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 Harmony
Since 1996, the National Weather Service has logged 339 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Harmony: 256 thunderstorm wind reports, 42 flash floods, 38 floods and 3 heavy rain events. They killed 0 people and injured 7, and the NWS estimated $15.0 million in property and crop damage. The strongest thunderstorm gust on record here was 100 mph, on October 14, 2003. August has had the most flash floods, 13 of 42. Of the 788 Pennsylvania cities on this site with a flash flood on record, 491 have had fewer than Harmony.
October 14, 2003: thunderstorm wind 10 miles from the centre of Harmony — 6 injured, $1.0 million damage.
August 22, 2017: thunderstorm wind 6 miles from the centre of Harmony — 1 injured, $15,000 damage.
May 28, 2019: flash flood 2 miles from the centre of Harmony — $5.1 million 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 Harmony's ZIP code 16037 have filed 127 claims with the National Flood Insurance Program since 1978, and were paid $3.4 million for buildings and contents, in the dollars of each year. The most came from Tropical Storm Ivan in 2004: 45 claims (35% of all) and $2.5 million. 43% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 553 Pennsylvania cities on this site with 10 or more claims, 412 have fewer than Harmony.
| Event | Claims | Paid |
|---|---|---|
| Tropical Storm Ivan2004 | 45 | $2.5 million |
Butler County, which includes Harmony, has been named in 11 federal disaster or emergency declarations since 1972, 7 of them major disasters (by incident: 3 floods, 3 hurricanes, 2 biological emergencies, 2 snowstorms). The latest major disaster declaration was Covid-19 Pandemic, on March 30, 2020. FEMA's National Risk Index gives Butler County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively High for lightning; Relatively Moderate for inland flooding and strong wind; Relatively Low for tornadoes and heat waves; Very Low for hurricanes and hail. It models the county's expected loss from all 18 hazards it covers at $47.7 million a year, the 20th highest of 67 Pennsylvania counties; of the hazards above, the largest share, $41.3 million (87%), 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 Harmony
- Zelienople, PA3 mi
- Fombell, PA3 mi
- Evans City, PA5 mi
- Prospect, PA6 mi
- Ellwood City, PA8 mi
- Renfrew, PA8 mi
- Cranberry Township, PA8 mi
- Portersville, PA9 mi
- Mars, PA10 mi
- New Brighton, PA10 mi
- Rochester, PA11 mi
- Freedom, PA11 mi
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