Enter any address in Windham County, Connecticut to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Windham County, CT. Recent events include flash flooding on June 21, 2024, and September 13, 2023, both associated with periods of heavy rain and thunderstorms.
National Flood Insurance Program (NFIP) data shows that properties in Zone A and Zone X_UNSHADED have experienced the most claims. While Zone A claims averaged $7,557 with 1.2 feet of water, Zone X_UNSHADED claims were significantly higher, averaging $56,206 with an average water depth of 3.3 feet. Properties in Zone X also saw substantial payouts, averaging $59,624.
Homeowners in Zone A, Zone X_UNSHADED, and Zone X should pay the most attention to flood risk. Those in Zone UNKNOWN also experienced claims, though with lower average payouts.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
19 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Windham County, Connecticut has recorded 39 flood-related events since 1996 according to NOAA's Storm Events Database, including 19 flash floods and 18 river or area floods. The county has received 28 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1978–2021)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Hurricane Henri | Hurricane | Aug 21, 2021 |
| Tropical Storm Isaias | Hurricane | Aug 4, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storm And Snowstorm | Severe Storm | Jan 26, 2015 |
| Severe Winter Storm | Severe Storm | Feb 8, 2013 |
| Severe Winter Storm And Snowstorm | Severe Storm | Feb 8, 2013 |
| Hurricane Sandy | Hurricane | Oct 27, 2012 |
| Severe Storm | Severe Storm | Oct 29, 2011 |
| Tropical Storm Irene | Hurricane | Aug 27, 2011 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 21, 2024 | 0.00K |
| Flood | Sep 13, 2023 | 0.00K |
| Flash Flood | Sep 13, 2023 | 0.00K |
| Flash Flood | Jul 17, 2021 | 3.00K |
| Flash Flood | Jul 17, 2021 | 5.00K |
| Flash Flood | Jul 17, 2021 | 10.00K |
| Flood | Jul 17, 2021 | 0.00K |
| Tropical Storm | Aug 4, 2020 | 562.00K |
| Flood | Jul 31, 2019 | 2.00K |
| Flood | Jul 22, 2019 | 0.00K |
Flash Flood — Jun 21, 2024
Two rounds of thunderstorms brought damaging winds and isolated flash flooding to Connecticut in the afternoon and evening.
Flood — Sep 13, 2023
A frontal system brought a period of heavy rain, flash flooding, and embedded thunderstorms to southern New England from the morning to mid evening. In addition to much tree damage from straight line winds, there was one tornado in Connecticut, 2 in Rhode Island, and 1 in Massachusetts. These all occurred in the afternoon.
Flash Flood — Sep 13, 2023
A frontal system brought a period of heavy rain, flash flooding, and embedded thunderstorms to southern New England from the morning to mid evening. In addition to much tree damage from straight line winds, there was one tornado in Connecticut, 2 in Rhode Island, and 1 in Massachusetts. These all occurred in the afternoon.
Flash Flood — Jul 17, 2021
A relatively stationary front meandered across southern New England on the 17th and 18th while low pressure slowly moved along the front. At upper levels, an upper low was moving slowly eastward from the Great Lakes. With very moisture-laden air in place across the region, the result was heavy rain and flash flooding. In addition, there were rounds of severe thunderstorms and even a weak torn...
Flood — Jul 17, 2021
A relatively stationary front meandered across southern New England on the 17th and 18th while low pressure slowly moved along the front. At upper levels, an upper low was moving slowly eastward from the Great Lakes. With very moisture-laden air in place across the region, the result was heavy rain and flash flooding. In addition, there were rounds of severe thunderstorms and even a weak torn...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Windham County, Connecticut:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Windham County, Connecticut that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.