Thunderstorm Wind, Frederick
- When
- April 9, 6:40 PM EST
- Where
- Frederick County, Countywide
- Property damage
- $6,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.467, -77.383
Twelve trees were downed.
Damaging Winds in Maryland, April 9, 2001
A cold front across the region on the 9th became the focus for evening thunderstorms. Some storms produced winds in excess of 58 MPH and small hail.
Where it happened
Every event with a place to put it. 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
- $31,000
- Crop damage
- None recorded
- Events
- 6
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.
A cold front across the region on the 9th became the focus for evening thunderstorms. Some storms produced winds in excess of 58 MPH and small hail. In Allegany County, pea sized hail fell in Westernport. In Washington County, scattered trees were downed. Winds gusted to 55 MPH just northeast of Smithsburg where small hail fell and 47 MPH in Hagerstown. In Frederick County, twelve trees were downed. A wind gust of 53 MPH was recorded in Middletown. In Montgomery County, a wind gust of 43 MPH was recorded in Chevy Chase. In Rockville, a wind gust of 63 MPH downed a tree onto a shed. In Carroll County, downed trees blocked roads in Pleasant Valley. Wind gusts included 52 MPH at Millers and 45 MPH in Westminster. In Baltimore County, winds gusted to 51 MPH in Parkton, 49 MPH in Brooklyn, and 44 MPH at Owings Mills. Scattered trees were downed across the county. In Anne Arundel County, a wind gust of 49 MPH was reported at Baltimore/Washington International Airport. In Harford County, scattered trees were downed.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Apr 9, 6:28 PM EST, 12 minutes earlier.
Area forecast discussion, Apr 9, 6:28 PM EST, 12 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 728 PM EDT MON APR 9 2001 QUICK ZN UPDATE FOR SVR TSTM WATCH ISSUED THRU MIDNIGHT. FCSTID = 13...PAP .LWX... DC...SVR $TSTM WATCH UNTIL MIDNIGHT. MD...SVR TSTM WATCH UNTIL MIDNIGHT EXCEPT ST MARYS COUNTY. VA...SVR TSTM WATCH UNTIL MIDNIGHT EXCEPT SOUTHERN TIER OF COUNTIES. WV...SVR TSTM WATCH UNTIL MIDNIGHT.
In the hours before
Special weather statement, Apr 9, 6:00 PM EST, 40 minutes before
MDZ002>004-WVZ048>052-092300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 700 PM EDT MON APR 9 2001 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 12 AM... STRONG THUNDERSTORMS WILL BE MOVING INTO WESTERN MARYLAND AND THE EASTERN PANHANDLE OF WEST VIRGINIA BETWEEN 7 AND 9:30 THIS EVENING. SOME OF THESE STORMS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS.f STRONG
The radar
The national radar mosaic for the moment the first event began.
Event by event
6 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, Washington
- When
- April 9, 6:40 PM EST
- Where
- Washington County, Countywide
- Property damage
- $5,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.617, -77.767
Scattered trees were downed.
Thunderstorm Wind, Carroll
- When
- April 9, 6:58 PM EST
- Where
- Carroll County, Pleasant Vly
- Property damage
- $5,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.633, -77.050
Trees were downed across roads.
Thunderstorm Wind, Baltimore
- When
- April 9, 7:15 PM EST
- Where
- Baltimore County, Countywide
- Property damage
- $5,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.450, -76.633
Scattered trees were downed.
Thunderstorm Wind, Harford
- When
- April 9, 7:20 PM EST
- Where
- Harford County, Countywide
- Property damage
- $5,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.583, -76.300
Scattered trees were downed.
Thunderstorm Wind, Montgomery
- When
- April 9, 7:45 PM EST
- Where
- Montgomery County, Rockville
- Measured
- 54 kt (62 mph)
- Property damage
- $5,000
- Reported by
- TRAINED SPOTTER
- Coordinates
- 39.083, -77.150
A tree was downed onto a shed by a wind gust of 63 MPH.
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
- Hail and Damaging Winds in Ohio, April 9, 2001
- Tornado and Hail in Ohio, April 9, 2001
- Tornadoes and Flash Flooding in Missouri, April 9 to 10, 2001
- Damaging Wind in California, April 9, 2001
- Hail and Damaging Winds in Indiana, April 9 to 10, 2001
- Heavy Snow in Montana, April 9, 2001
- Flash Flood and Flood in Pennsylvania, April 9, 2001
- Hail in Michigan, April 9, 2001
- Tornado and Hail in Illinois, April 9 to 10, 2001
- Damaging Wind in Pennsylvania, April 9, 2001
- Tornadoes and Hail in Pennsylvania, April 9, 2001
- Heavy Rain in New York, April 9 to 10, 2001
More
Every storm in Maryland in 2001Every state in 2001This day in weather historyWarnings in Maryland, April 2001
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: 5240065, 5240066, 5240067, 5240068, 5240069, 5240070.