County Hazards

Storm events on record through

Ontario County, New York Storm events, disaster declarations and flood insurance claims on record

This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).

NCEI has 644 storm events on record for Ontario County, New York, from 1950 through 30 Jun 2026.

The newest event on record is a thunderstorm wind event on 11 Jun 2026.

FEMA has 20 disaster declarations on record for the county from 1964 through 1 Oct 2026. The newest is DR-4825 of 24 Sep 2024.

OpenFEMA has 263 NFIP claims on record for the county from 1978 through 8 Sep 2026. The NFIP paid $3.8 million on these claims.

The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.

The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.

Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.

The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .

This is raw, unedited data from FEMA's National Emergency Management Information System (NEMIS) and as such is subject to a small percentage of human error.

The words of the agency. Source: FEMA, OpenFEMA Dataset "Disaster Declarations Summaries - v2", copied on . The page gives: last data refresh 2026-10-01.

It is derived from the National Flood Insurance Program system of record, staged in the program's reporting platform and redacted to protect policy holder personally identifiable information.

The words of the agency. Source: FEMA, OpenFEMA Dataset "NFIP Redacted Claims - v3", copied on . The page gives: last data refresh 2026-09-09.

Dates of the data: NCEI storm events through . OpenFEMA disaster declarations through . NFIP claims through .

Since the last update: no change is on record for Ontario County. The site compares the agency data at each update. Updates of the data

The five hazards

Storm events on record for Ontario County by hazard and period (NCEI, through 30 Jun 2026)
Hazard1950 to 20262000 to 20092010 to 20192020 to 2026Newest event
Hail5010219
Tornado7112
Flood82152833
Wind38749111168
Winter6929224
Other event types49Heat, cold, drought, wildfire, lightning, fog, tropical and other types
All storm events644110208234

A hazard name opens the page of that hazard for the county. A hazard has a page from 10 events. The year 2026 has the events through 30 Jun 2026 only.

Forecast zones with the name of the county give 142 of the 644 events. A county count has the events that NCEI gives to the county. It also has the events of a forecast zone that has the name of the county. A zone with another name counts for the state only.

Rates of Ontario County beside the total of the counties of New York and of the United States
MeasureOntarioAll counties of New YorkAll counties of the United States
Storm events for each 100 square miles, 1950 to 2026100.086.449.3
Storm events for each 10,000 residents, 1950 to 202657.220.552.5
NFIP claims for each 1,000 policies in force, 2016 to 2025198.7100.6185.3

The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. The site gives a rate for each 10,000 residents only from 10,000 residents. Residents and area: Census Bureau, 2021.

Newest storm events on record

Thunderstorm Wind58 mph (50 knots, estimated gust)

At FLINT

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile NE of PRE EMPTION

Extreme Cold/Wind Chill

On record for the forecast zone

Winter Storm

On record for the forecast zone

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile E of NORTH FARMINGTON. Damage estimate: $500

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile S of NORTH FARMINGTON. Damage estimate: $500

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile W of VICTOR. Damage estimate: $2 thousand

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile SW of OAKS CORNERS. Damage estimate: $4 thousand

Thunderstorm Wind58 mph (50 knots, estimated gust)

2 miles NNW of VICTOR. Damage estimate: $4 thousand

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile SW of GENEVA. Damage estimate: $2 thousand

Thunderstorm Wind58 mph (50 knots, estimated gust)

2 miles ESE of CANANDAIGUA FLD. Damage estimate: $500

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile E of BRISTOL. Damage estimate: $500

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile NE of HOLCOMB CREEKSIDE AR. Damage estimate: $500

Thunderstorm Wind58 mph (50 knots, estimated gust)

1 mile E of EAST BLOOMFIELD. Damage estimate: $2 thousand

TornadoEF2

2 miles S of PHELPS

Thunderstorm Wind58 mph (50 knots, estimated gust)

3 miles SW of NAPLES. Damage estimate: $500

Flash Flood

At CANANDAIGUA

Flash Flood

1 mile NNW of CANANDAIGUA

Flash Flood

2 miles ENE of SOUTH BLOOMFIELD

Flash Flood

1 mile NNE of FARMINGTON

Flash Flood

2 miles WNW of CANANDAIGUA

Thunderstorm Wind58 mph (50 knots, estimated gust)

At OAKS CORNERS. Damage estimate: $2 thousand

Thunderstorm Wind58 mph (50 knots, estimated gust)

2 miles ENE of PADDELFORD. Damage estimate: $500

Thunderstorm Wind96 mph (83 knots, estimated gust)

1 mile E of GYPSUM

Hail0.75 in, penny size

1 mile E of SHORTSVILLE

The 25 events above are the newest in the NCEI record. A place is the text of the NCEI record: a distance and a direction from a reference place. Wind speed is in miles per hour, with the knots that NCEI gives. The site does not show a place text that names a private property or reads as a person. Download these events (CSV)

Storm events on record for Ontario County by year, 1950 to 2026
DecadeYear that ends in 0Year that ends in 1Year that ends in 2Year that ends in 3Year that ends in 4Year that ends in 5Year that ends in 6Year that ends in 7Year that ends in 8Year that ends in 9All
1950s00000020002
1960s01001001104
1970s10001020217
1980s306530212224
1990s37013310614855
2000s12996911619218110
2010s17132416232217381325208
2020s2231172683487 (part of the year)234

A darker cell has a larger count. The number is in each cell.

NCEI recorded tornado events from 1950, and hail and thunderstorm wind events from 1955. It recorded all event types from 1996. A count before 1996 has fewer event types.

FEMA disaster declarations

FEMA has 20 disaster declarations on record for Ontario County from 1964 through 1 Oct 2026. The newest is DR-4825: REMNANTS OF TROPICAL STORM DEBBY.

Disaster declarations that name Ontario County (OpenFEMA, through 1 Oct 2026)
DeclaredNumberTypeIncident typeTitle in the FEMA recordAssistance
DR-4825Major disasterTropical StormREMNANTS OF TROPICAL STORM DEBBYPublic
DR-4723Major disasterSevere StormSEVERE STORMS AND FLOODINGPublic
DR-4480Major disasterBiologicalCOVID-19 PANDEMICIndividual, Public
EM-3434EmergencyBiologicalCOVID-19Public
DR-4180Major disasterSevere StormSEVERE STORMS AND FLOODINGPublic
EM-3351EmergencyHurricaneHURRICANE SANDYPublic
DR-1993Major disasterFloodSEVERE STORMS, FLOODING, TORNADOES, AND STRAIGHT-LINE WINDSPublic
EM-3262EmergencyHurricaneHURRICANE KATRINA EVACUATIONPublic
DR-1534Major disasterSevere StormSEVERE STORMS AND FLOODINGPublic
DR-1486Major disasterSevere StormSEVERE STORMS, FLOODING, AND TORNADOESIndividual, Public
EM-3186EmergencyOtherPOWER OUTAGEPublic
DR-1467Major disasterSevere Ice StormICE STORMIndividual, Public
DR-1391Major disasterFireFIRES AND EXPLOSIONSPublic
EM-3155EmergencyOtherWEST NILE VIRUSPublic
EM-3138EmergencySnowstormSNOWPublic
DR-1244Major disasterSevere StormNY - SEVERE WX, SEPT 7, 1998Public
DR-1095Major disasterFloodSEVERE STORMS AND FLOODINGPublic
EM-3107EmergencySnowstormSEVERE BLIZZARDPublic
DR-898Major disasterSnowstormSEVERE WINTER STORMPublic
DR-338Major disasterFloodTROPICAL STORM AGNESIndividual, Public

DR is a major disaster declaration. EM is an emergency declaration. FM is a fire management assistance declaration. A declaration for the whole state is on the New York page. What a disaster declaration is

The dataset includes declared recovery programs and geographic areas (county not available before 1964; Fire Management records are considered partial due to historical nature of the dataset).

The words of the agency. Source: FEMA, OpenFEMA Dataset "Disaster Declarations Summaries - v2", copied on . The page gives: last data refresh 2026-10-01.

Flood insurance claims (NFIP)

OpenFEMA has 263 NFIP claims on record for Ontario County from 1978 through 8 Sep 2026.

The NFIP paid $3,840,994 on 171 claims.

The county has 198.7 NFIP claims for each 1,000 policies in force. The rate uses 59 claims with a year of loss from 2016 to 2025. FEMA counts 297 residential policies in force on 3 Aug 2026. The claims have every type of building. FEMA counts residential policies only.

NFIP claims in Ontario County by year of loss, 1978 to 2026
DecadeYear that ends in 0Year that ends in 1Year that ends in 2Year that ends in 3Year that ends in 4Year that ends in 5Year that ends in 6Year that ends in 7Year that ends in 8Year that ends in 9All
1970s11011
1980s063031521223
1990s12152611402079
2000s0103100124021
2010s296232150110279
2020s212126144 (part of the year)50

A darker cell has a larger count. The number is in each cell.

NFIP claims by year of loss with the amount paid: 39 years
NFIP claims in Ontario County by year of loss, with the amount paid (OpenFEMA, through 8 Sep 2026)
Year of lossClaimsClaims with a paymentAmount paid
20264not shownnot shown
20254not shownnot shown
20241not shownnot shown
20232626$500,221
20221not shownnot shown
20211210$128,656
20202not shownnot shown
20192not shownnot shown
2017118$133,144
20151510$240,311
20143219$566,142
20132not shownnot shown
201265$1,276,521
201197$108,022
20102not shownnot shown
20084not shownnot shown
20072not shownnot shown
20061not shownnot shown
2004108$60,793
20033not shownnot shown
20011not shownnot shown
19982not shownnot shown
1996146$16,711
19951not shownnot shown
19946not shownnot shown
19935238$480,646
19921not shownnot shown
19912not shownnot shown
19901not shownnot shown
19892not shownnot shown
19881not shownnot shown
19872not shownnot shown
19865not shownnot shown
19851not shownnot shown
19843not shownnot shown
19823not shownnot shown
19816not shownnot shown
1979105$4,166
19781not shownnot shown

A year with fewer than 5 claims shows the count of claims and no amount. A year with 1 to 4 claims with a payment shows no amount either. Such an amount could point to one property. The amount is the sum of the building, contents and increased cost of compliance payments. FEMA counts 22 multiple-loss properties in the county (2 Aug 2026). How FEMA redacts NFIP claims

This dataset is not intended to be an official federal report, and should not be considered an official federal report.

Note, the County Code field may not reflect the individual county the property is located as projects can be associated with more than one county

The words of the agency. Source: FEMA, OpenFEMA Dataset "NFIP Redacted Claims - v3", copied on . The page gives: last data refresh 2026-09-09.

FEMA cannot verify the quality and/or timeliness of any data or any analysis derived therefrom after the data has been retrieved from FEMA.gov.

The words of the agency. Source: FEMA, OpenFEMA Terms and Conditions, copied on . The page gives: last updated 2025-01-22.

National Risk Index

Risk Index rating
Relatively Low
Risk Index score
63.5 of 100
Expected Annual Loss rating
Relatively Low
Expected Annual Loss
$27 million
Social Vulnerability rating
Relatively Low
Community Resilience rating
Very High
National Risk Index of Ontario County by hazard type (FEMA, December 2025 release)
Hazard typeRisk Index ratingExpected Annual Loss
AvalancheVery Low$388
Cold waveVery Low$131,466
DroughtRelatively Moderate$818,254
EarthquakeVery Low$366,397
HailRelatively Low$394,415
Heat waveRelatively Low$369,002
HurricaneRelatively Low$211,359
Ice stormRelatively Moderate$379,454
Inland floodingRelatively Moderate$21,118,513
LandslideVery Low$2,158
LightningRelatively Low$325,764
Strong windRelatively Moderate$1,316,240
TornadoRelatively Low$1,157,001
WildfireVery Low$26,363
Winter weatherVery Low$18,507

The National Risk Index dataset leverages available source data for natural hazard and community risk factors to develop a baseline relative risk measurement for each United States county and Census tract.

The rating is a qualitative categorization that describes the community in comparison to all other communities at the same level, ranging from “Very Low” to “Very High.”

The National Risk Index data are meant for planning purposes only.

The words of the agency. Source: FEMA, National Risk Index Data: Frequently Asked Questions (December 2025, v1.20), copied on .

The labels and the ratings are those of FEMA. Expected Annual Loss is a figure for a whole county. It is not a figure for a property. How to read the National Risk Index

Tropical storm and hurricane tracks

The HURDAT2 record of the National Hurricane Center has 9 tracks within 100 miles of the centre point of the county, through the 2025 season. 0 of them were within 50 miles at hurricane strength.

Storm names, years and distances: 9 tracks
Tropical storm and hurricane tracks within 100 miles of the centre point of Ontario County (NHC HURDAT2)
Storm nameYearNearest point of the trackHighest wind within 100 miles
Frances200420 miles40 mph
Opal199563 miles40 mph
Unnamed Atlantic storm193360 miles40 mph
Unnamed Atlantic storm190318 miles52 mph
Unnamed Atlantic storm190299 miles40 mph
Unnamed Atlantic storm189319 miles69 mph
Unnamed Atlantic storm188561 miles46 mph
Unnamed Atlantic storm187899 miles46 mph
Unnamed Atlantic storm187627 miles46 mph

A name is the storm name that the National Hurricane Center gave. The distance is from the centre line of the track. It does not show how far the wind, the rain or the surge of a storm went.

ZIP Codes, cities and towns of Ontario County

Each ZIP Code below has a page with its NFIP claims by year. 10 more ZIP Codes have fewer than 5 claims and no page.

A city or town has no page of its own. This page is the record for the whole county, which has these places:

  • Bloomfield
  • Canandaigua
  • Clifton Springs
  • Crystal Beach
  • Geneva
  • Gorham
  • Hall
  • Honeoye
  • Manchester
  • Naples
  • Phelps
  • Port Gibson
  • Rushville
  • Shortsville
  • Victor

Official channels

These links open the pages of the agencies. The site checked the links on .

Cite this page

County Hazards. "Ontario County, New York: storm events, disaster declarations and flood insurance claims on record". https://countyhazards.com/county/ny/ontario/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026; FEMA OpenFEMA disaster declarations through 1 Oct 2026; FEMA OpenFEMA NFIP claims through 8 Sep 2026. Page made on .

Where the data comes from

  • Storm events: NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026.
  • Disaster declarations: OpenFEMA Disaster Declarations Summaries, read on 1 Oct 2026.
  • NFIP claims: OpenFEMA NFIP Claims, as of 8 Sep 2026. Multiple-loss properties: 2 Aug 2026. Policies in force: 3 Aug 2026.
  • National Risk Index: FEMA, December 2025 release. Storm tracks: NHC HURDAT2 through the 2025 season.
  • Residents, area, places and adjacent counties: US Census Bureau, 2021 vintage.

How the counts are made · Corrections · Hazards in all states: hail, tornado, flood, wind, winter

Questions

How many tornado events are on record for Ontario County?
NCEI has 7 tornado events on record for Ontario County from 1950 through 30 Jun 2026. 1 event has a rating of EF2 or F2, or a higher rating.
How large is the hail on record for Ontario County?
NCEI has 50 hail events on record from 1955 through 30 Jun 2026. 14 events have a hail size of 1.75 inches or more. NCEI names 1.75 inches a golf ball.
Which month has the most storm events on record for Ontario County?
June has 131 of the 644 storm events on record from 1950 through 30 Jun 2026.
How many NFIP claims are there for each 1,000 policies in force in Ontario County?
The county has 198.7 NFIP claims for each 1,000 policies in force. The rate uses 59 claims with a year of loss from 2016 to 2025. FEMA counts 297 residential policies in force on 3 Aug 2026. The claims have every type of building. FEMA counts residential policies only.