70
Recorded events
0
Direct deaths
0
Direct injuries
$2.0M
Property damage
Flash Flood in Loudoun County, Virginia: 70 recorded events between 1996 and 2025. The strongest on record measured 0. That places the county #339 nationally and #9 statewide for this hazard.
Decade by decade
Flash Flood in Loudoun County, Virginia: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Loudoun County is the 2010s, when 25 of the county's 70 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Loudoun County archive, flash flood makes up 6.4% of all recorded severe weather across 9 hazard types. Nationally the county sits at #339 for this hazard and #9 within Virginia, putting it in the 88.9 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for flash flood in Loudoun County with 17 recorded events, while Dec is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 15, 2025 | STERLING | 0 | $0 |
| May 6, 2025 | ROUND HILL | 0 | $0 |
| Sep 8, 2023 | ARCOLA | 0 | $0 |
| Aug 12, 2020 | STERLING | 0 | $0 |
| Aug 7, 2020 | LEESBURG | 0 | $0 |
| Aug 7, 2020 | LEESBURG | 0 | $0 |
| Aug 7, 2020 | WATERFORD | 0 | $0 |
| Aug 7, 2020 | HAMILTON | 0 | $0 |
| Aug 7, 2020 | PAEONIAN SPGS | 0 | $0 |
| Aug 7, 2020 | LEESBURG | 0 | $0 |
Other hazards here
More from Loudoun County
- Thunderstorm Wind 678
- Hail 170
- Flood 109
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
The stream gauge on Limestone Branch near Leesburg reached a flood stage of 7 feet. It peaked at 9.13 feet at 22:30 EST. Greenfield Farm Lane and another access road began to flood and field flooding near the stream became widespread. A home near route 15 along the stream began to flood.
The water level at Limestone Branch rapidly rose above the flood stage of 7 feet, cresting at 10.26 feet at 10:20 PM EST, August 6th. Water entered entered homes near the stream and Route 15 was flooded at Limestown Branch in between Leesburg and Lucketts. The water remained above flood stage until 12:04 AM EST on August 7th.
The water level rapidly rose above the flood state of 8 feet, cresting at 11.11 feet at 12:25 AM EST on August 7th. Portions of Route 662 were flooded and water approached a building on Main Street in Waterford. The water level remained above flood stage until 5:41 AM EST on August 7th.
Quick answers
Frequently asked
How many flash flood events are on record in Loudoun County, Virginia?
70 flash flood events are recorded in Loudoun County between 1996 and 2025, causing 0 direct deaths.
What is the strongest flash flood recorded in Loudoun County?
The strongest flash flood on record in Loudoun County measured 0.
Where does the flash flood data for Loudoun County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flash Flood in Loudoun County, Virginia.” Severe Weather History. severeweatherhistory.com/county/virginia/loudoun-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.