Harrison County, West Virginia
Natural disaster risk, federal disaster history and flood insurance facts.
Harrison County, West Virginia has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 74% of US counties. It ranks 9th of 55 counties in West Virginia. The costliest hazards here are inland flooding, hail and tornadoes. FEMA estimates about $28 million a year in expected losses, or roughly $429 per resident. Since 1967 it has been included in 23 federal disaster or emergency declarations for natural events (18 major disasters). The most recent was in October 2026 (severe storms and flooding). Fewer than 1 in 100 homes here carry federal flood insurance (162 policies). Since 1978, federal flood insurance has paid about $5.7 million on 786 claims here, including $2.0 million for floods in 1985.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Harrison County
- Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
- Price a flood policy now. Most new federal policies take 30 days to start.
- Ask about the roof age and any impact-rated shingles.
- Check your home policy for a separate wind and hail deductible.
- Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
- Turn on emergency alerts on your phone and keep a weather radio.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 86.7 | $25M | ||
| Hail | 74.2 | $589K | ||
| Tornado | 35.0 | $588K | ||
| Lightning | 73.7 | $493K | ||
| Strong wind | 44.5 | $409K | ||
| Earthquake | 51.9 | $265K | ||
| Heat wave | 39.4 | $194K | ||
| Hurricane | 60.6 | $194K | ||
| Cold wave | 17.3 | $158K | ||
| Ice storm | 51.8 | $80K | ||
| Winter weather | 58.4 | $75K | ||
| Drought | 35.3 | $37K | ||
| Landslide | 84.7 | $25K | ||
| Wildfire | 25.2 | $9K | ||
| Avalanche | 11.0 | $8 |
Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively moderate and community resilience is very high in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Harrison County. 2020s bar runs to November 2026.
By type
Most recent
Show all 23
West Virginia also had 6 statewide declarations that did not name single counties.
Storm history since 1970
Tornado risk by county ›The National Weather Service has logged 506 storm reports in Harrison County since 1970, with 3 deaths and 6 injuries and about $15.9 million in reported damage. The strongest on record here was an F2 tornado on August 22, 1970.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Aug 22, 1970 | F2 | – | 0 / 0 |
| May 24, 1998 | F1 | Sardis | 1 / 0 |
| Jun 23, 2017 | EF1 | Maken | 0 / 0 |
| Jul 27, 2014 | EF1 | Johnstown | 0 / 0 |
| Jun 19, 1975 | F1 | – | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jun 29, 2012 | Thunderstorm Wind | Shinnston | $4M |
| Aug 22, 1970 | Tornado | – | $3M |
| Jul 29, 2017 | Flash Flood | Margret | $1M |
| Jun 3, 2008 | Flash Flood | Industrial | $1M |
| Aug 6, 2011 | Flash Flood | Lodgeville | $950K |
| Jun 16, 1998 | Hail | Clarksburg | $750K |
Source: NOAA Storm Events Database, county-based reports through Jul 22, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.
Hurricanes and tropical storms
Hurricane risk by county ›Since 1888, 0 hurricanes and 4 tropical storms have passed within 65 miles of the center of Harrison County, 3 of them since 1950. The strongest was Tropical Storm Isabel (2003), with top winds near 50 mph about 55 miles away.
Strongest storms nearby
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Sep 19, 2003 | Isabel | Tropical storm, 50 mph | 55 mi |
| Aug 21, 1888 | Unnamed | Tropical storm, 50 mph | 49 mi |
| Sep 22, 1989 | Hugo | Tropical storm, 45 mph | 62 mi |
| Sep 14, 1979 | Frederic | Tropical storm, 40 mph | 36 mi |
Most recent storms
| Date | Storm | Strength | Closest |
|---|---|---|---|
| Sep 19, 2003 | Isabel | Tropical storm, 50 mph | 55 mi |
| Sep 22, 1989 | Hugo | Tropical storm, 45 mph | 62 mi |
| Sep 14, 1979 | Frederic | Tropical storm, 40 mph | 36 mi |
| Aug 21, 1888 | Unnamed | Tropical storm, 50 mph | 49 mi |
Source: NOAA National Hurricane Center best-track records (HURDAT2), 1851 to 2025 for the Atlantic and 1949 to 2025 for the eastern Pacific. A storm counts if its track passed within 65 miles of the county's center while it was a tropical storm or hurricane. Strength is the storm's top sustained wind at that point, not the wind measured in the county. Older storms over the open sea were sometimes missed.
Flood insurance in Harrison County
Check your address flood zone ›National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.
Homes in Harrison County
Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 30,537 housing units.
Compare in West Virginia
All 55 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Kanawha County | Inland flooding | |
| Berkeley County | Inland flooding | |
| Monongalia County | Inland flooding | |
| Cabell County | Inland flooding | |
| Wood County | Inland flooding | |
| Raleigh County | Inland flooding | |
| Harrison County | Inland flooding | |
| Mercer County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Marion County | 20 | |
| Upshur County | 20 | |
| Lewis County | 23 | |
| Taylor County | 18 | |
| Barbour County | 19 | |
| Wetzel County | 26 | |
| Doddridge County | 23 |
Common questions about Harrison County
What is the biggest natural hazard in Harrison County?
Inland flooding has the highest expected yearly losses in Harrison County, about $25.1 million a year in FEMA's estimate. Hail is second at $588,514.
How many federal disasters has Harrison County had?
Harrison County has been included in 23 federal disaster or emergency declarations for natural events since 1967, including 18 major disasters. The most recent was Severe Storms and Flooding in October 2026.
Is Harrison County a high-risk place to live?
Its overall rating is Relatively Low, 9th highest of 55 in West Virginia. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.
Do I need flood insurance in Harrison County?
Standard home insurance does not cover flooding. About 1 in 200 homes in Harrison County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.
How many tornadoes has Harrison County had?
NOAA records list 6 tornadoes in Harrison County since 1950. The strongest was an F2 tornado on August 22, 1970. The weather service has also logged 82 hail reports and 128 floods here.
How many hurricanes have hit Harrison County?
NOAA's hurricane records show 0 hurricanes and 4 tropical storms passing within 65 miles of the center of Harrison County. The strongest was Tropical Storm Isabel (2003), with winds near 50 mph.
Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.