EF1 tornado, Stanton to Mermaid, Delaware, August 8, 2024

1. EF065 to 85 mph

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

2. EF186 to 110 mphthis tornado

   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

EF1

Date

August 8, 2024

Touchdown

7:11 PM EDT (23:11 UTC)

Lifted

7:13 PM EDT (23:13 UTC)

On the ground

2 minutes

Path length

1.1 miles (1.8 km)

Path width

150 yards (137 m)

Deaths

0

Injuries

0

County

New Castle County

Touchdown point

39.725, -75.651

Lift-off point

39.741, -75.655

Record number

2408081711-01

6 damage points were recorded along this path by NWS PHI, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EFU. The highest wind the damage implies is 95 mph.

• Wood pole with electrical wires snapped.
• Multiple trees uprooted in the Sherwood Park area along with additional tree damage.

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

Showers and thunderstorms developing along a stationary front resulted in a few showers and thunderstorms developing. A few storms were severe producing damaging wind gusts and a tornado. Additionally training storms led to flash flooding in northern Delaware.

Tree damage was noted starting in Weer Circle. Along Old Capitol Trail, a small tree was snapped at the trunk, and additional tree damage was noted near a commercial building between Old Capitol Trail and Kirkwood Highway. When it was in the area of Kirkwood Highway, there were multiple witnesses of the tornado. A business at a strip mall along Kirkwood Highway lost a portion of the roof. The tornado continued along a path towards the intersection of Farrand Drive and Hammond Place where there was damage to a free standing light pole. Additional damage, primarily uprooted trees was noted in the Sherwood Park development. The last observed damage was noted near West Robino Drive.

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

12 minutes of warning. NWS PHI issued a tornado warning for this county at 22:59 UTC, 12 minutes before the tornado touched down, in force until 23:30 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 General Thunderstorms Risk. The outlook in force was issued at 19:32 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), 103 km away, was scanning. The volume nearest the touchdown began at 23:07 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 2024 tornado in DelawareEvery tornado in Delaware since 1950Warnings in force in Delaware nowThe forecast where you are

11 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.