Maryland, 1993

Damaging Winds in Maryland, August 11, 1993

August 11, 1993 · 3 events in 2 counties and zones

3 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 3 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

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The toll

Deaths
0
Injuries
0
Property damage
$11,000
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.

The radar

The Sterling radar (KLWX), 75 km away, was scanning. The volume nearest the first event began at 01:26 UTC.

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Event by event

3 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Washington

When
August 11, 8:27 PM EST
Where
Washington County
Property damage
$5,000
Coordinates
39.604, -77.814 (the zone’s center; the record gives no point)

Thunderstorm Wind, Frederick

When
August 11, 8:51 PM EST
Where
Frederick County, Countywide
Property damage
$500
Coordinates
39.472, -77.398 (the zone’s center; the record gives no point)

Powerful thunderstorm winds knocked down trees and power lines near Smithburg in Washington County. Thunderstorm winds gusting to over 60 mph knocked down power lines and trees in three or four locations in the west-central part of Frederick County. Later thunderstorm winds caused widespread damage, primarily numerous trees and power lines downed, in the southern part of Frederick County. A barn was struck by lightning and burned down in the southern part of Frederick County as well.

Thunderstorm Wind, Frederick

When
August 11, 9:30 PM EST
Where
Frederick County, Countywide
Property damage
$5,000
Coordinates
39.472, -77.398 (the zone’s center; the record gives no point)

Powerful thunderstorm winds knocked down trees and power lines near Smithburg in Washington County. Thunderstorm winds gusting to over 60 mph knocked down power lines and trees in three or four locations in the west-central part of Frederick County. Later thunderstorm winds caused widespread damage, primarily numerous trees and power lines downed, in the southern part of Frederick County. A barn was struck by lightning and burned down in the southern part of Frederick County as well.

What these are

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

More

Every storm in Maryland in 1993Every state in 1993This day in weather historyWarnings in Maryland, August 1993

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: 10329728, 10329634, 10329635.