NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Mahopac, 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
40 tropical systems have passed within 75 miles of Mahopac, New York since 1851, 6 of them at hurricane strength; the most recent was Ida in 2021. Since 1950, 42 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 6
- Tropical storms
- 34
- Tornadoes
- 42
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
11 deaths in all
What the records show for Mahopac
The strongest storm to pass near Mahopac was an unnamed storm in 1938, a Category 3 hurricane with 113 mph winds when its centre passed 44 miles away. The closest pass by a hurricane was an unnamed storm in 1893, whose centre came within 6 miles. The record near Mahopac begins with an unnamed storm in 1861; the most recent system was Ida in 2021, a tropical storm 67 miles away. The busiest decade was the 1890s, with 5 systems, 2 of them at hurricane strength. Of the 40 systems, 4 have come since 2000. Mahopac has more hurricanes within 75 miles than 65% of the 809 New York cities on this site. The highest rating among the 42 tornadoes within 25 miles is F2 or EF2, reached 7 times; the most recent, on May 15, 2018, came within 9 miles. The deadliest, an F1 on November 16, 1989, killed 9 people. Of the 42, 3 had paths within 5 miles of the city centre, and 21 have come since 2000. July has had the most tornadoes, 11. The most recent tornado was on August 12, 2023. Mahopac has more tornadoes within 25 miles than 89% of the 809 New York cities. Hail has been reported within 10 miles 46 times since 1970, with stones up to 1.75 inches (golf ball size). Mahopac has more hail reports within 10 miles than 57% of the 809 New York cities.
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Tropical storms and hurricanes near Mahopac
| Year | Storm | Closest | Strength when closest | Peak |
|---|---|---|---|---|
| 2021 | IdaSep 2 | 67 mi | Tropical storm (45 mph) | Category 4 |
| 2020 | IsaiasAug 4 | 49 mi | Tropical storm (60 mph) | Category 1 |
| 2011 | IreneAug 28 | 6 mi | Tropical storm (61 mph) | Category 3 |
| 2008 | HannaSep 7 | 44 mi | Tropical storm (52 mph) | Category 1 |
| 1999 | FloydSep 17 | 41 mi | Tropical storm (58 mph) | Category 4 |
| 1996 | BerthaJul 13 | 31 mi | Tropical storm (69 mph) | Category 3 |
| 1985 | GloriaSep 27 | 37 mi | Category 1 (86 mph) | Category 4 |
| 1976 | BelleAug 10 | 36 mi | Tropical storm (66 mph) | Category 3 |
| 1972 | AgnesJun 22 | 6 mi | Tropical storm (54 mph) | Category 1 |
| 1971 | DoriaAug 28 | 8 mi | Tropical storm (58 mph) | Tropical storm |
| 1968 | Unnamed 1968 stormSep 11 | 36 mi | Tropical storm (63 mph) | Tropical storm |
| 1961 | Unnamed 1961 stormSep 15 | 49 mi | Tropical storm (63 mph) | Tropical storm |
| 1960 | DonnaSep 12 | 62 mi | Category 2 (96 mph) | Category 4 |
| 1960 | BrendaJul 30 | 32 mi | Tropical storm (55 mph) | Tropical storm |
| 1955 | DianeAug 19 | 53 mi | Tropical storm (46 mph) | Category 2 |
| 1952 | AbleSep 1 | 13 mi | Tropical storm (54 mph) | Category 2 |
| 1949 | Unnamed 1949 stormAug 29 | 75 mi | Tropical storm (55 mph) | Category 4 |
| 1938 | Unnamed 1938 stormSep 21 | 44 mi | Category 3 (113 mph) | Category 5 |
| 1934 | Unnamed 1934 stormSep 9 | 41 mi | Tropical storm (58 mph) | Category 2 |
| 1934 | Unnamed 1934 stormJun 19 | 58 mi | Tropical storm (46 mph) | Category 2 |
| 1924 | Unnamed 1924 stormSep 30 | 6 mi | Tropical storm (67 mph) | Category 1 |
| 1916 | Unnamed 1916 stormMay 17 | 67 mi | Tropical storm (56 mph) | Tropical storm |
| 1915 | Unnamed 1915 stormAug 4 | 8 mi | Tropical storm (54 mph) | Category 1 |
| 1902 | Unnamed 1902 stormJun 16 | 70 mi | Tropical storm (43 mph) | Tropical storm |
| 1900 | Unnamed 1900 stormOct 14 | 74 mi | Tropical storm (40 mph) | Tropical storm |
| 1899 | Unnamed 1899 stormNov 1 | 38 mi | Tropical storm (53 mph) | Category 2 |
| 1897 | Unnamed 1897 stormSep 24 | 67 mi | Tropical storm (63 mph) | Tropical storm |
| 1894 | Unnamed 1894 stormOct 10 | 62 mi | Category 1 (83 mph) | Category 3 |
| 1893 | Unnamed 1893 stormAug 29 | 28 mi | Tropical storm (63 mph) | Category 3 |
| 1893 | Unnamed 1893 stormAug 24 | 6 mi | Category 1 (82 mph) | Category 3 |
| 1888 | Unnamed 1888 stormSep 12 | 55 mi | Tropical storm (40 mph) | Tropical storm |
| 1888 | Unnamed 1888 stormAug 22 | overhead | Tropical storm (46 mph) | Category 3 |
| 1882 | Unnamed 1882 stormSep 24 | 67 mi | Tropical storm (46 mph) | Tropical storm |
| 1878 | Unnamed 1878 stormOct 23 | 63 mi | Category 1 (75 mph) | Category 2 |
| 1877 | Unnamed 1877 stormOct 5 | 75 mi | Tropical storm (69 mph) | Category 3 |
| 1874 | Unnamed 1874 stormSep 30 | 27 mi | Tropical storm (69 mph) | Category 1 |
| 1872 | Unnamed 1872 stormOct 26 | 41 mi | Tropical storm (46 mph) | Category 1 |
| 1866 | Unnamed 1866 stormOct 30 | 11 mi | Tropical storm (58 mph) | Tropical storm |
| 1863 | Unnamed 1863 stormSep 19 | 6 mi | Tropical storm (48 mph) | Tropical storm |
| 1861 | Unnamed 1861 stormSep 28 | 28 mi | Tropical storm (61 mph) | Category 1 |
Strength is the sustained wind on the track at the closest point, which is not the wind felt in Mahopac: 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 Mahopac
By decade
- 2020s1
- 2010s9
- 2000s11
- 1990s8
- 1980s4
- 1970s6
- 1960s1
- 1950s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 15, 2018 | EF2 | 9 mi | 1.18 mi | 0 / 0 |
| Jul 12, 2006 | F2 | 19 mi | 10.1 mi | 0 / 6 |
| Jul 10, 1989 | F2 | 5 mi | 0.5 mi | 0 / 5 |
| Jul 29, 1971 | F2 | in town | 4.5 mi | 0 / 0 |
| Jul 29, 1971 | F2 | 16 mi | 6.2 mi | 0 / 0 |
| Aug 21, 1951 | F2 | 24 mi | 43.9 mi | 0 / 9 |
| Jul 14, 1950 | F2 | 15 mi | 5 mi | 0 / 3 |
| Nov 16, 1989 | F1 | 22 mi | 9.1 mi | 9 / 18 |
| Oct 2, 2018 | EF1 | 21 mi | 3.76 mi | 0 / 0 |
| Oct 2, 2018 | EF1 | 12 mi | 4.28 mi | 0 / 0 |
| Oct 2, 2018 | EF1 | 17 mi | 2.12 mi | 0 / 0 |
| May 15, 2018 | EF1 | 12 mi | 2.92 mi | 0 / 0 |
The strongest 12 of 42, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Mahopac
The Storm Prediction Center has 46 hail reports within 10 miles of Mahopac since 1970, made on 31 separate days. Of these, 21 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.75 inches (golf ball size), was reported on 6 days, most recently September 6, 2014. The most recent report is from May 23, 2024. July has the most reports, 16.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Mahopac
The nearest NOAA station with 1991–2020 climate normals is Yorktown Hts 1W, NY, 8 miles south of Mahopac at 670 feet. July is the warmest, with an average high of 83°F and low of 61°F; January is the coolest, at 36°F and 17°F. June is the wettest at 5.0 inches of precipitation on average and February the driest at 3.1 inches; the year adds up to 50.3 inches over 83 days with at least a tenth of an inch. June to November, the hurricane season months, bring 54% of the year's precipitation (27.2 of 50.3 inches); the other six months are drier. September has brought the most of the 40 tropical systems that passed within 75 miles (17); a normal September there has highs of 74°F and 4.8 inches of precipitation. Highs reach 90°F on about 10 days a year, almost all from June to August. Lows fall below freezing on about 116 nights a year. Snowfall averages 39.5 inches a year, most of it in February. That 50.3 inches is more than at 124 of the 137 New York stations used on this site (91%). Putnam Valley, 5 miles west, has its own station (West Point, NY): 51.5 inches a year, 1.2 more than here, and a July average high of 85°F against 83°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 36 | 17 | 3.7 | 7 | 8.8 |
| Feb | 39 | 18 | 3.1 | 6 | 12.6 |
| Mar | 47 | 25 | 4.1 | 7 | 8.2 |
| Apr | 60 | 36 | 3.9 | 7 | 1.8 |
| May | 70 | 46 | 3.9 | 8 | 0.0 |
| Jun | 78 | 55 | 5.0 | 8 | 0.0 |
| Jul | 83 | 61 | 4.3 | 7 | 0.0 |
| Aug | 81 | 59 | 4.3 | 7 | 0.0 |
| Sep | 74 | 52 | 4.8 | 6 | 0.0 |
| Oct | 63 | 41 | 4.6 | 6 | 0.0 |
| Nov | 51 | 32 | 4.2 | 6 | 0.5 |
| Dec | 41 | 23 | 4.4 | 7 | 7.6 |
| Year | 60 | 39 | 50.3 | 83 | 39.5 |
Averages for 1991–2020 at Yorktown Hts 1W, NY (670 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 Mahopac
Since 1996, the National Weather Service has logged 196 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Mahopac: 170 thunderstorm wind reports, 18 flash floods, 4 floods, 3 heavy rain events and 1 lightning strike. They killed 1 person and injured 11, and the NWS estimated $557,000 in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on May 15, 2018. July has had the most flash floods, 12 of 18. Of the 798 New York cities on this site with a flash flood on record, 287 have had fewer than Mahopac.
June 22, 2011: heavy rain event 8 miles from the centre of Mahopac — 1 killed.
July 7, 1997: thunderstorm wind 5 miles from the centre of Mahopac — 7 injured.
August 16, 1997: thunderstorm wind 7 miles from the centre of Mahopac — 3 injured.
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 Mahopac's ZIP code 10541 have filed 105 claims with the National Flood Insurance Program since 1978, and were paid $380,000 for buildings and contents, in the dollars of each year. The most came from Not a named storm in 1979: 12 claims (11% of all) and $12,000. 45% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 549 New York cities on this site with 10 or more claims, 384 have fewer than Mahopac.
| Event | Claims | Paid |
|---|---|---|
| Not a named storm1979 | 12 | $12,000 |
Putnam County, which includes Mahopac, has been named in 29 federal disaster or emergency declarations since 1965, 17 of them major disasters (by incident: 11 hurricanes, 5 severe storms, 4 snowstorms, 3 floods). The latest major disaster declaration was Severe Storms and Flooding, on July 22, 2023. FEMA's National Risk Index gives Putnam County a Very Low rating for natural hazard risk overall; by hazard: Relatively Moderate for strong wind; Relatively Low for hurricanes, tornadoes, inland flooding, lightning and heat waves; Very Low for hail and coastal flooding. It models the county's expected loss from all 18 hazards it covers at $20.3 million a year, the 44th highest of 62 New York counties; of the hazards above, the largest share, $13.6 million (67%), 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 Mahopac
- Somers, NY4 mi
- Putnam Valley, NY5 mi
- Shrub Oak, NY5 mi
- Yorktown Heights, NY6 mi
- Carmel, NY6 mi
- Mohegan Lake, NY6 mi
- Goldens Bridge, NY7 mi
- Lake Peekskill, NY7 mi
- North Salem, NY8 mi
- Katonah, NY8 mi
- Cortlandt Manor, NY9 mi
- Brewster, NY9 mi
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