Enter any address in Grayson County, Virginia to see its FEMA flood zone
Flash flooding from intense thunderstorms dominates flood events in Grayson County. Between 1996 and 2023, NOAA data recorded 39 flash flood events and 14 flood events, with one recorded fatality. Recent intense thunderstorms in May 2024 produced flash flooding, driven by atmospheric conditions including high CAPE values and significant precipitable water.
NFIP claims data indicates that properties in Zone A and Zone Unknown have experienced flooding. While Zone A had one claim with an average payout of $9,384, Zone Unknown saw four claims averaging $505 with an average water depth of 1.2 feet. Homeowners in areas designated as Zone A, or those with unknown flood zone designations, should pay close attention to flood risk information.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
32 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Grayson County, Virginia has recorded 53 flood-related events since 1996 according to NOAA's Storm Events Database, including 39 flash floods and 14 river or area floods. The county has received 21 federal disaster declarations, 3 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1976–2026)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Jan 22, 2026 |
| Severe Winter Storms And Flooding | Severe Storm | Feb 10, 2025 |
| Post-tropical Cyclone Helene | Tropical Storm | Sep 25, 2024 |
| Tropical Storm Helene | Tropical Storm | Sep 25, 2024 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Tropical Storm Michael | Hurricane | Oct 9, 2018 |
| Hurricane Florence | Hurricane | Sep 13, 2018 |
| Hurricane Sandy | Hurricane | Oct 26, 2012 |
| Severe Winter Storm And Snowstorm | Snowstorm | Dec 18, 2009 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Sep 27, 2024 | 0.00K |
| Flash Flood | Sep 27, 2024 | 23.00M (1 deaths) |
| Flood | Sep 26, 2024 | 500.00K |
| Flood | Sep 26, 2024 | 2.00M |
| Flash Flood | Sep 26, 2024 | 0.00K |
| Flash Flood | May 22, 2024 | 15.00K |
| Flash Flood | May 22, 2024 | 25.00K |
| Flash Flood | May 22, 2024 | 0.00K |
| Flood | Jun 9, 2021 | 0.00K |
| Flood | Jul 22, 2020 | 25.00K |
Flash Flood — Sep 27, 2024
Hurricane Helene made landfall in Florida as a powerful Category 4 hurricane late Thursday, September 26, and moved quickly northward into the southeastern states, and then turned slightly northwestward towards the southern Appalachian Mountains overnight into Friday morning, weakening as it moved over land. Helene���s intensity and fast forward motion led to impacts being felt well inlan...
Flood — Sep 26, 2024
Hurricane Helene made landfall in Florida as a powerful Category 4 hurricane late Thursday, September 26, and moved quickly northward into the southeastern states, and then turned slightly northwestward towards the southern Appalachian Mountains overnight into Friday morning, weakening as it moved over land. Helene���s intensity and fast forward motion led to impacts being felt well inlan...
Flash Flood — Sep 26, 2024
An upper level low was situated in the vicinity of western Tennessee, while a strong upper ridge was positioned over the southeast coast, which helped to steer Hurricane Helene into the Florida Big Bend during the evening of September 26. Ahead of Helene, the Predecessor Rainfall Event (PRE) that developed on the 25th continued to intensify as upper level areas of low pressure rotating around t...
Flash Flood — May 22, 2024
Multiple intense thunderstorms developed with the passage of an upper level disturbance during an afternoon of strong daytime heating. Abundant sunshine and above normal warmth resulted in surface-base CAPE (Convective Available Potential Energy) values ranging from 2,000 to 2,500 J/Kg for areas west of the Blue Ridge in western Virginia. Precipitable water values were estimated to be in the ...
Flood — Jun 9, 2021
Widely scattered thunderstorms developed during the afternoon of June 9th in an environment of strong afternoon heating as temperatures warmed into the low 80s. CAPE values ranged from 1,500 to 2,000 J/Kg and Precipitable Water values were observed to be in the 1.6 to 1.7 inch range. The combination of instability and abundant moisture resulted in storms producing localized rainfall rates as hi...
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 Grayson County, Virginia:
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 Grayson County, Virginia 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.