Loudoun County, Virginia: hazard history

FEMA declared 16 disasters that named Loudoun County between 1972 and 2026.

Most recent declarations

• EM-3631 2026 · Winter Storm · Severe Winter Storm
• EM-3448 2020 · Biological · Covid-19
• DR-4512 2020 · Biological · Covid-19 Pandemic
• EM-3403 2018 · Hurricane · Hurricane Florence
• DR-4262 2016 · Snowstorm · Severe Winter Storm And Snowstorm
• EM-3359 2012 · Hurricane · Hurricane Sandy
• DR-4092 2012 · Hurricane · Hurricane Sandy
• DR-1905 2010 · Snowstorm · Severe Winter Storms And Snowstorms
• EM-3240 2005 · Hurricane · Hurricane Katrina Evacuation
• DR-1491 2003 · Hurricane · Hurricane Isabel

Not counted above: 3 statewide declarations, which covered every county in Virginia. A declaration is a decision to send federal help, not a measure of how bad an event was. Records run from 1953. Source: FEMA OpenFEMA Disaster Declarations Summaries.

Records start in 1996. Damage is NOAA's estimate at the time, in nominal dollars, and is often rounded; it is not insurance claims data. A storm that crossed two NOAA zones in this county is recorded, and counted, once per zone.

NOAA storm event records in Loudoun County each year. The busiest year was 2019, with 93 records.

Years with no record are left out of the table, not shown as zero.

Costliest records

1. Tornado · Feb 7, 2020$5.8M
   NOAA name: LOUDOUN · NOAA record 878117
2. Hail · Apr 23, 1999$3.0M
   NOAA name: LOUDOUN · NOAA record 5695110
3. Tornado · Sep 17, 2004$3.0M
   NOAA name: LOUDOUN · NOAA record 5425472
4. Hail · Apr 23, 1999$2.0M
   NOAA name: LOUDOUN · NOAA record 5695108
5. Hail · Apr 23, 1999$2.0M
   NOAA name: LOUDOUN · NOAA record 5695109

Deadliest records

1. Winter Weather · Jan 26, 20042 deaths
   NOAA name: LOUDOUN · NOAA record 5381715
2. Strong Wind · Feb 14, 20071 death
   NOAA name: LOUDOUN · 1 injury · NOAA record 16426
3. High Wind · Dec 31, 20081 death
   NOAA name: LOUDOUN · NOAA record 144639
4. Thunderstorm Wind · Jul 25, 20101 death
   NOAA name: LOUDOUN · NOAA record 249196
5. Thunderstorm Wind · Jul 3, 20111 death
   NOAA name: LOUDOUN · NOAA record 334153

Each line is one NOAA record, linked to its page at NOAA. One large storm can appear more than once if NOAA recorded it in several zones of this county. Dollars are nominal.

The National Flood Insurance Program paid $2.2M on 169 claims in Loudoun County from 1979 to 2023.

A count of claims, not a rate: NFIP publishes no count of insured homes beside it, and most flood damage is uninsured. Nominal dollars. Records run from 1978 to 2024; claims filed without a county code are not on any county page. Source: FEMA OpenFEMA FIMA NFIP Redacted Claims.

A hazard vulnerability analysis rates each hazard for probability, impact, preparedness and response. Probability is the one column the county’s federal record can fill — NCEI storm events from 1996 to 2026 and FEMA declarations naming the county — and this is what it says for a facility here, on the 0–3 scale of the all-hazards structure surveyors expect. The other six columns are the facility’s own judgment about its building, and Calchis leaves them blank.

A dash means the record does not speak to that hazard; it is not a zero. Whether a finished document satisfies the CMS Emergency Preparedness Rule is the facility’s finding and its surveyor’s. Complete the HVA for a facility in Loudoun County — the technological, human and hazardous-materials rows, the six facility columns, the approval and the printed document — or read the sample analysis on that page first.

• Every figure is counted from public federal records held by Calchis: NOAA NCEI Storm Events, FEMA OpenFEMA Disaster Declarations, and FEMA NFIP claims. Nothing is modeled or estimated.
• NOAA files some events by county and others by forecast zone, and names both. Records are counted as Loudoun County when their NOAA name is this county's name, alone or with a word like “Coastal” or “Inland” in front. The county codes NOAA also publishes have not been loaded for Virginia yet; when they are, this page will count by code instead, and some counties' records will grow. NOAA names counted here: EASTERN LOUDOUN, LOUDOUN, WESTERN LOUDOUN. Zones named for something else, such as a mountain range or two counties at once, are left out: 2% of Virginia's NOAA records.
• Counts last rebuilt from the source records on Sep 15, 2026.