Mamaroneck

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Every storm within 100 miles

1. Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.

National Hurricane Center HURDAT2, 1851 to 2025.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Flood insurance figures are for Westchester County, the county that contains Mamaroneck.

Claims by ZIP code

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).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges in Westchester County, the county that contains Mamaroneck.

The National Weather Service sets flood stages for 2 gauges here but lists no crests for them.

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

The drought index is for Westchester County, the county that contains Mamaroneck.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the city centre.
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Tsunamis

Tsunami records for Westchester County.

1. Places where NOAA's Global Historical Tsunami Database records a tsunami's water arriving, with the greatest height it reached above sea level at the time. Only tsunamis NOAA rates probable or definite are counted. Heights from eyewitness accounts and tide gauges are mixed, and older events are less completely recorded.

NOAA NCEI/WDS Global Historical Tsunami Database, retrieved October 30, 2026.

Mapped landslides

Landslides mapped in Westchester County.

Mapped by NASA (3).

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

More event types since 1996

Costliest events since 1996

1. Sep 1, 2021Flash Flood$92.6 million
   National Weather Service narrative

   Flash flooding resulted in an estimated $92.6 million in damages across Westchester County. This estimate includes $78 million in FEMA individual assistance to property owners, renters, and businesses and an additional $14.6 million in damages to Westchester County government infrastructure.

2. Jul 12, 2006Tornado$10.1 million
   National Weather Service narrative

   A weak F1 tornado touched down in Grandview On Hudson in Rockland County at approximately 3:30 pm EDT. After damaging a dock on the Rockland County shoreline, the tornado moved east to northeast, about 3 miles across the Hudson River. The tornado over turned a boat near the Tappen Zee Bridge then moved across the western shores of Westchester County over the town of Sleepy Hollow around 3:37 pm EDT. Houses and businesses along Beekman Avenue, Depeyster Street, and Chestnut Street in Sleepy Hollow experienced roof and siding damage associated with an F1 tornado intensity. The tornado continued on an east to northeast track to the Sleepy Hollow High School. A 58 mph wind gust was…

3. Sep 16, 1999Flash Flood$6.6 million
   National Weather Service narrative

   Torrential record rainfall, which caused serious widespread urban, small stream, and river flooding, preceded the remnants of Hurricane Floyd, which passed over Western Suffolk County of Long Island from 7 pm to 9 pm on September 16th.Death: In Rockland County, a 53-year old man died around midnight on the 17th when he was swept into the Pearl River while walking in Orangetown.Property Damage: Orange, Putnam, Rockland, and Westchester Counties were declared disaster areas. For these 4 counties, the initial cost estimates were $14.6 million dollars. These figures represents "eligible" costs for disaster payments, and were provided by the New York State Emergency Management Office.…

4. Jul 7, 2009Thunderstorm Wind$1.0 million
   National Weather Service narrative

   A severe thunderstorm that produced storm damage in Bergen county in|northeastern New Jersey moved into Yonkers around 11:25 pm as the|storm intensified. Doppler weather radar analysis would classify|the storm as a supercell with a strong mesocyclone at this time. A|large area of very strong downburst winds downed numerous large|trees that fell on structures, power lines and cars. The worst damage|observed in the area was in Trevor Park around the Hudson River|Museum where winds were estimated to have gusted up to 100 mph. Some minor damage appeared to occur to the roof of the Museum with a few shingles blown off. Nearly all trees appeared to have fallen to the east or southeast.…

5. Oct 29, 2012High Wind, Northern Westchester$1.0 million
   National Weather Service narrative

   A wind gust of 64 mph was reported on the Tappan Zee Bridge at 613 pm. In North Salem, two boys aged 11 and 13 were killed when a tree fell into the house.

6. Oct 29, 2012High Wind, Southern Westchester$900,000
   National Weather Service narrative

   A wind gust up to 72 mph was measured at White Plains Airport at 705 pm. a 54 year old male was killed when he drove his car into a fallen tree in Greenburgh on the Sprain Parkway.

7. Apr 13, 2020High Wind, Northern Westchester$500,000
   National Weather Service narrative

   At 1051 am, the mesonet station at Tappan Zee Light measured a 68 mph wind gust, and a 48 mph sustained wind. The sensor is elevated to 44 feet. A 51 mph wind gust was measured in Peekskill at 1033 am. According to social media, a tree was knocked down across Alpine Drive near the town of Roe Park at 1015 am. Power was out. Around 1115 am, there were multiple reports from emergency managers of trees down on Route 9A and local roads through the town of Ossining. Around 1150 am, social media reports in the town of Somers were of a large tree down across Valley Pond Road. In North Salem, social media reported a downed tree and wires at 312 pm on NY 22 in both directions at Valeria…

8. Mar 2, 2018High Wind, Northern Westchester$500,000
   National Weather Service narrative

   At Westchester Airport, a gust to 64 was reported at 229 pm. The Department of Highways reported downed wires and a power pole on NY100 at 837 am. All lanes were closed. Around 946 am, a tree was knocked doen in Sleepy Hollow on US 9 southbound. At 120 pm, a large tree fell onto a house in Ossining. The broadcast media reported wires down and burning in Tarrytown at 220 pm. The media also reported multiple tractor trailers were overturned on the Governor Mario Cuomo bridge at 236 pm. Estimated wind gusts over the bridge were between 70 and 80 MPH. At 440 pm in the town of Shrub Oak, multiple trees were knocked down onto power lines across town. A personal weather station measured…

9. Feb 13, 2017High Wind, Northern Westchester$200,000
   National Weather Service narrative

   At White Plains Airport, a wind gust up to 72 mph occurred at 952 am. At 1 pm, a train derailed due to a tree falling on the tracks just north of the Hawthorne station according to the broadcast media. Metro-North Harlem Line service was suspended at 1221 pm due to downed trees near Hawthorne.

10. Jun 22, 2008Lightning$200,000
    National Weather Service narrative

    Lightning struck the upper portion of a condo complex, ignited fires, and displaced at least 8 families.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

107°FJul 3, 1966

All-time low

−7°FFeb 15, 1943

Warmest night

86°F3 times, most recently Jul 19, 2013

Coldest day

8°FJan 21, 1985

Wettest day

6.80 inSep 1, 2021

Snowiest day

27.9 inJan 23, 2016

Hottest year

2016mean 58.7°F

Coldest year

1940mean 51.5°F

Wettest year

201165.34 in

Driest year

196522.17 in

Snowiest season

77.9 in1995-96

Station Laguardia Airport (USW00014732), 10 ft elevation, 13.5 miles from the city centre. Daily records from 1939 to October 27, 2026; 100.0% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

Declarations for Westchester County.

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).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USW00014732.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Tsunamis NOAA NCEI/WDS Global Historical Tsunami Database.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.