EF1 tornado, Stamping Ground, Kentucky, December 6, 2021

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

December 6, 2021

Touchdown

4:22 AM EST (09:22 UTC)

Lifted

4:23 AM EST (09:23 UTC)

On the ground

1 minutes

Path length

0.3 miles (0.4 km)

Path width

60 yards (55 m)

Deaths

0

Injuries

2

County

Scott County

Touchdown point

38.265, -84.683

Lift-off point

38.265, -84.678

Record number

2112060322-01

11 damage points were recorded along this path by NWS LMK, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 95 mph.

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

A potent cold front combined with elevated wind energy crossing the region allowed a widespread area of showers and thunderstorms to develop late Sunday night through early Monday morning. Some wind damage and minor flooding occurred, along with two EF1 tornadoes.

The National Weather Service in Louisville, Kentucky conducted a storm survey in Scott County, Kentucky of storm damage that occurred early Monday morning.||The survey team determined that a tornado touched down just southwest of the Parkers Mobile Home Park in Stamping Ground. The initial touchdown was in a wooden fenced area with uprooted trees and significant damage to the wooden fence. Wind speeds were estimated to be between 80 and 85 mph initially.||The tornado increased in speed and diameter, striking the mobile home park causing|significant damage. Trailers were lifted off their foundation, some trailers were flipped|over and or turned in a different direction. Insulation and metal siding from the trailers|were thrown up into the trees. Deck pieces were thrown and impaled into the ground, trees were twisted and snapped, and numerous air conditioner units were thrown several feet. The tornado increased to around 95 mph with a width of 60 yards.||The most obvious signs of a tornado were outbuildings were picked up and thrown upwind, with insulation on both sides of the buildings.||The damage direction from the trees, and insulation from mobile homes ranged north to southeasterly.||The tornado became more of a skipping tornado as it moved to the east with the last damage being some power poles and trees at the corner of Edgewood Way and 227.||Just east of Stamping Ground, the survey team found a significant area of straight line winds along Duvall Station Road. A third of a mile swath of concentrated wind damage occurred 2 miles east of Stamping Ground.||It started out in a grove of trees with large branches and trees knocked down all facing from the southwesterly to the east northeast direction. Wind speeds were estimated initially to be 65 to 70 mph. A well constructed barn had its roof panels ripped off and doors blown in. Metal sheeting from the barn was thrown up to 500 yards down wind. Two other barns on the other side of the road had similar damage. Shingles from two family homes were thrown a hundred yards. Wind speeds from the well constructed barn, were determined to be 80 mph. The damage area was about a quarter mile by a third of a mile.||The National Weather Service would like to thank Scott county emergency manager Mike Hennigan for his assistance with the survey.

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

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

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 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.

Capital City Airport/Frankfort (FFT), 21 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Louisville radar (KLVX), 115 km away, was scanning. The volume nearest the touchdown began at 09:24 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 KentuckyEvery tornado in Kentucky since 1950Warnings in force in Kentucky nowThe forecast where you are

14 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.