Flash Flood, Watauga
- When
- August 25, 2:15 PM EST to 4:00 PM EST
- Where
- Watauga County, Boone
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 36.231, -81.696 (the zone’s center; the record gives no point)
Flash Flooding and Hail in North Carolina, August 25, 1999
Heavy thunderstorm rain flooded roads in Reidsville, and flooded and closed many roads in Boone.
Where it happened
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 5
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS RNK wrote it up.
Thunderstorms during the afternoon and evening of the 25th produced damaging winds, hail up to golf ball size, and flash flooding.Thunderstorm winds downed trees and power lines in Reidsville.Heavy thunderstorm rain flooded roads in Reidsville, and flooded and closed many roads in Boone.
The radar
The Knoxville radar (KMRX), 153 km away, was scanning. The volume nearest the first event began at 22:17 UTC.
Event by event
2 flash flood, 2 hail, 1 thunderstorm wind. Local standard time, as filed.
Hail, Stokes
- When
- August 25, 5:18 PM EST
- Where
- Stokes County, Dillard
- Measured
- 1.75 in hail
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 36.400, -80.100
Hail, Rockingham
- When
- August 25, 5:33 PM EST
- Where
- Rockingham County, Mayodan
- Measured
- 0.75 in hail
- Reported by
- UNKNOWN
- Coordinates
- 36.420, -79.970
Thunderstorm Wind, Rockingham
- When
- August 25, 6:15 PM EST
- Where
- Rockingham County, Reidsville
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 36.370, -79.670
Flash Flood, Rockingham
- When
- August 25, 6:15 PM EST to 7:15 PM EST
- Where
- Rockingham County, Reidsville
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 36.396, -79.775 (the zone’s center; the record gives no point)
What these are
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Lightning Strike in Mississippi, August 25, 1999
- Flash Flooding and Heavy Rain in Maryland, August 25, 1999
- Damaging Wind and Lightning Strike in Virginia, August 25, 1999
- Hail and Damaging Winds in Mississippi, August 25, 1999
- Lightning Strike in Florida, August 25, 1999
- Heavy Rain in Pennsylvania, August 25 to 26, 1999
- Hail in Georgia, August 25, 1999
- Heavy Rain in Maryland, August 25, 1999
- Heavy Rain in New Jersey, August 25 to 26, 1999
- Drought in North Carolina, August 25, 1999
- Heavy Rain in Virginia, August 25, 1999
- Wildfire in Oregon, August 25, 1999
More
Every storm in North Carolina in 1999Every state in 1999This day in weather historyWarnings in North Carolina, August 1999
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5713634, 5713632, 5713633, 5713631, 5713635.