Enter any address in Harrison County, Ohio to see its FEMA flood zone
Flash flooding from thunderstorms is the dominant flood character in Harrison County. Between 1994 and 2024, NOAA data recorded 41 flash flood events and 13 general flood events. Recent examples include flash flooding in April 2024, prompted by multiple rounds of showers and thunderstorms across the Ohio River Valley, and flash flooding in July 2025, associated with heavy rain from thunderstorms.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A have experienced the highest average water depths and payouts, with an average of 10.6 feet of water and $7,887 per claim. Properties in Zone X also show significant average payouts, though with a negative average water depth, suggesting a data anomaly or specific reporting convention for that zone. Homeowners in Zone A, and those in areas with unknown flood zone designations, should pay particular attention to their flood risk.
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.
Harrison County, Ohio has recorded 54 flood-related events since 1996 according to NOAA's Storm Events Database, including 41 flash floods and 13 river or area floods. The county has received 18 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 (1965–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms, Landslides, And Mudslides | Flood | Feb 14, 2018 |
| Severe Storms | Severe Storm | Jun 29, 2012 |
| Severe Storms And Straight-line Winds | Severe Storm | Jun 29, 2012 |
| Severe Wind Storm Associated With Tropical Depression Ike | Severe Storm | Sep 14, 2008 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Winter Storms, Flooding, And Mudslides | Severe Storm | Dec 22, 2004 |
| Severe Storms And Flooding | Severe Storm | Aug 27, 2004 |
| Severe Storms And Flooding | Severe Storm | May 18, 2004 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 9, 2025 | 0.00K |
| Flash Flood | Apr 2, 2024 | 0.00K |
| Flood | Feb 17, 2022 | 5.00K |
| Flood | Aug 18, 2021 | 50.00K |
| Flash Flood | Mar 20, 2020 | 100.00K (2 deaths) |
| Flash Flood | Jun 19, 2019 | 0.00K |
| Flash Flood | Jul 11, 2019 | 1.00K |
| Flood | Jul 7, 2019 | 1.00K |
| Flash Flood | Jun 10, 2018 | 0.00K |
| Flash Flood | Jun 16, 2015 | 5.00K |
Flash Flood — Jul 9, 2025
A shortwave trough supported a swath of heavy rain along a PWAT gradient with values as high as 1.9 inches across far southwestern Pennsylvania and northern West Virginia. 500-1000 J/kg of MUCAPE and 20 knots of cloud bearing flow supported thunderstorms producing heavy rain and flash flooding.
Flash Flood — Apr 2, 2024
Several rounds of showers and thunderstorms prompted a widespread flash flood problems across the Ohio River Valley on April 2nd to April 3rd. The synoptic pattern across the CONUS was a slow moving and deep elongated trough over the Great Plains phasing with a ejecting trough over the Midwest that created an area of converging moisture over eastern Ohio and western Pennsylvania. Overall, over ...
Flood — Feb 17, 2022
A slow moving low pressure system brought unseasonable heavy rainfall to portions of our county warning area; 1.50 to 2 inches of rainfall was noted in eastern Ohio in 24 hours.
Flood — Aug 18, 2021
Remnants of Tropical Storm Fred brought flooding to portions of the region due to training rain bands.
Flash Flood — Mar 20, 2020
A deepening low pressure system crossed the Great Lake region on March 20th and promoted heavy rainfall and isolated thunderstorms. Localized flooding had been anticipated for parts of Ohio since 2 inches of rain already fell 48 hours prior.
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 Harrison County, Ohio:
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 Harrison County, Ohio 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.