Flash Flood, Montgomery
- When
- June 18, 12:00 AM EST to 3:00 AM EST
- Where
- Montgomery County, Central Portion
- Property damage
- $30,000
- Coordinates
- 39.136, -77.204 (the zone’s center; the record gives no point)
Flash Flood in Maryland, June 18, 1996
Intense "training" thunderstorms dumped rainfall of 3 to 4 inches within 3 hours in the Darnestown-Germantown-N. Gaithersburg area, causing Seneca Creek to overflow it's banks.
Where it happened
Every event with a place to put it; 1 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
- $30,000
- Crop damage
- None recorded
- Events
- 1
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 LWX wrote it up.
Intense "training" thunderstorms dumped rainfall of 3 to 4 inches within 3 hours in the Darnestown-Germantown-N. Gaithersburg area, causing Seneca Creek to overflow it's banks. The flooding closed numerous thoroughfares, including state route 28 just north of Darnestown and Riffle Ford Road. An automobile was trapped in the flood waters along route 28 around 0230EST, and one occupant had to be rescued. These and other roadways remained closed into the morning rush on the 18th. On state route 109 west of Interstate 270, a 50 x 24 section of pavement was eroded by a swollen brach of Little Bennett Creek.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flash flood. Local standard time, as filed.
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood in Michigan, June 18, 1996
- Flood in Wisconsin, June 18 to 30, 1996
- Flood in Wisconsin, June 18 to 20, 1996
- Flash Flood in Wisconsin, June 18, 1996
- Tropical Storm in North Carolina, June 18 to 19, 1996
- Flood in Wisconsin, June 18, 1996
- Flash Flood in Wisconsin, June 18, 1996
- Tropical Storm in North Carolina, June 18 to 19, 1996
- Flash Flood in Pennsylvania, June 18, 1996
- Flash Flood in Maryland, June 18 to 19, 1996
- Flash Flood in Wisconsin, June 18, 1996
- Lightning Strike in Oklahoma, June 18, 1996
More
Every storm in Maryland in 1996Every state in 1996This day in weather historyWarnings in Maryland, June 1996
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: 5560603.