EF0 tornado, Showell to Ironshire, Maryland, August 4, 2020

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

August 4, 2020

Touchdown

7:55 AM EDT (11:55 UTC)

Lifted

8:05 AM EDT (12:05 UTC)

On the ground

10 minutes

Path length

9.6 miles (15.5 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

Property damage

$20,000

County

Worcester County

Touchdown point

38.401, -75.176

Lift-off point

38.263, -75.158

Record number

2008040555-01

The center of Tropical Storm Isaias tracked north just inland of the Middle Atlantic Coast from late Monday night, August 3rd through Tuesday morning, August 4th. Outer bands north and east of the Tropical Storm produced five tornadoes across portions of the Lower Maryland Eastern Shore.

An EF0 tornado initially touched down just south of Berlin on Harrison Road, then tracked northwest across Route 113 passing on the west side of Berlin. Trees were snapped and uprooted along Main and Broad streets in Berlin. The tornado continued northwest possibly lifting briefly and touching down again as it crossed Route 50. Trees were uprooted along Carey Road then farther north on Pitts Road and Fooks Road. The tornado appeared to have weakened and lifted shortly after crossing Fooks Road.

An EF0 tornado initially touched down just northwest of the Assateague Visitor Center snapping trees along Stephens Decatur Highway. The tornado may have bounced at times as it tracked north eventually crossing Route 50 where several trees were uprooted. The tornado approached Ocean Pines uprooting trees on Ocean City Expressway. The tornado tracked through Ocean Pines knocking a tree on a home on Gum Point and snapping and uprooting trees up to the River Run Golf Course. The tornado was lifting as it moved across the Golf Course. Damage throughout this track was light with mostly broken limbs and some occasional uprooted to snapped trees.

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

35 minutes of warning. NWS AKQ issued a tornado warning for this county at 11:20 UTC, 35 minutes before the tornado touched down, in force until 12:00 UTC.

The county was under a tornado watch, issued at 06:28 UTC and running to 15:32 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 Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 05:53 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), 60 km away, was scanning. The volume nearest the touchdown began at 11:55 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 2020 tornado in MarylandEvery tornado in Maryland since 1950Warnings in force in Maryland nowThe forecast where you are

30 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.