FEMA flood zones · West Virginia

Mason County, West Virginia Flood Zone Map

140 flood insurance claims·$1.1M paid·5 federal flood & hurricane disasters

11% of Mason County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Mason County, West Virginia. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Mason County floods

Long-term historical records show that river flooding dominates Mason County, with 51 standard flood events compared to 21 flash flood events over the last 30 years. NOAA storm reports illustrate this pattern, such as an advancing low-pressure system in January 2025 that caused local creeks and streams to spill out of their banks, as well as prolonged rainfall events in February 2025 driven by approaching low-pressure systems and warm fronts that produced widespread high water issues.

National Flood Insurance Program records indicate that claims are distributed across multiple zones, with Zone A recording 56 claims with an average payout of $15,233 and an average recorded water depth of 4 inches. Shaded Zone X accounts for 35 claims averaging $6,331 with an average water depth of 5 inches, while unshaded Zone X saw 14 claims averaging $3,511 with an average water depth of 3 inches, and standard Zone X recorded 7 claims averaging $15,568 with an average depth of 2 inches. Additionally, unknown zones registered 28 claims averaging $1,849 with an average depth of 2 inches. Homeowners and real estate agents in Zone A and shaded Zone X should pay the most attention, as these areas experience the highest frequency of claims and substantial average payout amounts.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

Where the flood claims came from

47% of Mason County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

105 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 3 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 1979, with 31 claims and $49,190 paid.

1978: 15 claims1979: 31 claims1980: 3 claims1981: 1 claims1982: 2 claims1983: 1 claims1985: 5 claims1989: 1 claims1990: 1 claims1991: 2 claims1994: 2 claims1996: 13 claims1997: 25 claims2000: 4 claims2001: 1 claims2002: 1 claims2003: 3 claims2004: 8 claims2005: 3 claims2008: 1 claims2010: 1 claims2011: 4 claims2012: 1 claims2018: 3 claims2019: 2 claims2020: 2 claims2021: 2 claims2022: 1 claims2025: 1 claims19801990200020102020

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

55 NOAA storm reports from Mason County describe what happened, in the words of the forecasters who covered it. Read the West Virginia flood stories →

Federal disasters

21 federal disaster declarations since 1967, 5 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 23, 2026
Severe Winter StormsFeb 10, 2021
Severe Storms, Flooding, Landslides, And MudslidesFeb 14, 2018
Severe Storms And FloodingJun 13, 2013
Hurricane SandyOct 29, 2012
Severe StormsJun 29, 2012
Severe Storms And Straight-line WindsJun 29, 2012
Hurricane Katrina EvacuationAug 29, 2005

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

72 since 1996: 21 flash floods and 51 river or area floods.

EventDateDamage
FloodJan 31, 2025$150
FloodMay 30, 2025—
FloodFeb 17, 2025—
FloodFeb 16, 2025—
FloodFeb 6, 2025—
Flash FloodJul 1, 2025—
FloodApr 13, 2024—
FloodApr 4, 2024$5,000

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flood · Jan 31, 2025. An advancing low pressure system set forth ample amounts of lift and moisture to round out the month of January. Widespread rainfall first entered into the southwestern coalfields of West Virginia on the morning of January 31st, and continued to invade northeastward and up into the higher terrain of the state. Local creeks and streams quickly spilled out of their banks on that day in conjunction with high water is…

Flood · May 30, 2025. A warm front lifted into the vicinity of West Virginia on the night of May 29th and remained present overhead until being ushered east by a low the evening of the 30th. Behind this system, a cold front approached from the north and slowly descended southward through the area on the 31st.||Rounds of rain and storms moved across the area on the 30th, with several severe thunderstorms downing power lines and numerous…

Flood · Feb 17, 2025. Light precipitation started to arrive on the evening of February 14th due to an approaching low pressure system, with more substantial rain spreading across the area overnight into the 15th as a warm front approached from the south. This promoted a brief instance of thunderstorms on the morning of February 15th, with damaging winds knocking down trees and power lines to parts of the state. While shower coverage di…

Flood · Feb 16, 2025. Light precipitation started to arrive on the evening of February 14th due to an approaching low pressure system, with more substantial rain spreading across the area overnight into the 15th as a warm front approached from the south. This promoted a brief instance of thunderstorms on the morning of February 15th, with damaging winds knocking down trees and power lines to parts of the state. While shower coverage di…

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Mason County

If a building in Mason County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.