EF0 tornado, Ft Howard to (Mtn)Martin Arpt Bal, Maryland, September 1, 2021

1. EF065 to 85 mphthis tornado

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mph

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF0

Date

September 1, 2021

Touchdown

2:48 PM EDT (18:48 UTC)

Lifted

3:00 PM EDT (19:00 UTC)

On the ground

12 minutes

Path length

6.7 miles (10.8 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

Property damage

$40,000

County

Baltimore County

Touchdown point

39.197, -76.442

Lift-off point

39.285, -76.388

Record number

2109011248-01

18 damage points were recorded along this path by NWS LWX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF2. The highest wind the damage implies is 124 mph.

• Tree fell into side of house
• 2:23pm estimate by eyewitness next door. Sheltered from WEA. Tree into home.
• Hardwood tree snapped, 8" in diameter
• Large branches broken (3-6" diameter), Hardwood Trees snapped (at least 5 visible from trails/roads) (3-6" diameter)

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

The remnants of Ida produced two tornadoes and sporadic straight line wind damage.

A NWS storm survey team determined that aN EF-0 tornado occurred near Edgemere in Baltimore County, Maryland, on Wednesday afternoon, September 1, 2021. This tornado produced scattered minor tree damage across an approximate 6.7 mile path. This tornado was produced by the same supercell that produced the Anne Arundel County/Annapolis tornado roughly a half hour prior.||The first damage noted was near Fort Howard Park where there were broken tree branches and a hardwood tree snapped. As the tornado progressed to the northeast, hardwood and softwood trees were snapped and uprooted along Fort Howard Park Road. The tornado continued its northeast trek through North Point State Park where more broken tree branches and softwood trees were found snapped. Sporadic damage continued throughout the park before the tornado crossed the Black River.||As the tornado moved northeast over Rocky Point, leaf debris and small branches covered Rocky Point Golf Course. The northeast track continued just west of Browns Creek where hardwood trees were sheared on the tree line and tree branches were broken. The last of the damage was found near Holly Beach.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

0 minutes of warning. NWS LWX issued a tornado warning for this county at 18:48 UTC, 0 minutes before the tornado touched down, in force until 19:15 UTC.

The county was under a tornado watch, issued at 15:48 UTC and running to 22:59 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Enhanced Risk, with a 0.10 chance of a tornado within 25 miles. The outlook in force was issued at 16:17 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

The Dover AFB radar (KDOX), 96 km away, was scanning. The volume nearest the touchdown began at 18:50 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2021 tornado in MarylandEvery tornado in Maryland since 1950Warnings in force in Maryland nowThe forecast where you are

10 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.