Flash Flood, Allegany
- When
- July 31, 3:00 PM EST to 5:00 PM EST
- Where
- Allegany County, West Portion
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.622, -78.699 (the zone’s center; the record gives no point)
Roads and streams were flooded.
Tornado and Flash Flooding in Maryland, July 31, 2000
Isolated thunderstorms moved across Allegany and St. Mary's Counties during the afternoon of the 31st.
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
- $3,000
- Crop damage
- None recorded
- Events
- 3
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.
Isolated thunderstorms moved across Allegany and St. Mary's Counties during the afternoon of the 31st. Across the western portion of Allegany County, several roads were flooded and streams overflowed their banks after heavy downpours. Near Lonaconing, trees were downed along Route 36 at the intersection of George's Creek. A total of 1.85 inches of rain was recorded in Cumberland and over 3 inches fell in Westernport. In St. Mary's county, a weak tornado only 30 yards wide touched down momentarily just north of Hollywood at Higgs Memorial Ball Park. The F0 twister was only on the ground for one tenth of a mile but it damaged one structure, a dugout at the ballfield.
The radar
The Sterling radar (KLWX), 127 km away, was scanning. The volume nearest the first event began at 20:49 UTC.
Event by event
2 flash flood, 1 tornado. Local standard time, as filed.
Flash Flood, Allegany
- When
- July 31, 3:08 PM EST
- Where
- Allegany County, Lonaconing
- Property damage
- $2,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.622, -78.699 (the zone’s center; the record gives no point)
Trees were downed along Route 36 near George's Creek.
Tornado, St. Mary'S
- When
- July 31, 3:47 PM EST
- Where
- St. Mary'S County, 2 mi N of Hollywood
- Rating
- F0
- Path length
- 0.5 mi
- Path width
- 30 yd
- Property damage
- $1,000
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 38.370, -76.583
A dugout at Higgs Memorial Ball Park was destroyed.
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.
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- High Wind in North Dakota, July 31, 2000
- Heat in Texas, July 31, 2000
- Flash Flooding in New York, July 31, 2000
- Flash Flood and Lightning Strikes in Virginia, July 31, 2000
- Flooding and Damaging Wind in Georgia, July 31, 2000
- Damaging Wind in Florida, July 31, 2000
- Wildfire in Montana, July 31, 2000
- Flash Flooding in Pennsylvania, July 31, 2000
- Damaging Wind in New York, July 31, 2000
- Flash Flooding in West Virginia, July 31, 2000
- Flash Flooding and Damaging Wind in New York, July 31, 2000
- Flash Flood in Indiana, July 31, 2000
More
Every storm in Maryland in 2000Every state in 2000This day in weather historyThe tornado archive for Maryland, 2000Warnings in Maryland, July 2000
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: 5176137, 5176138, 5176139.