EF1 tornado, Gillmore, Kentucky, February 28, 2011

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

February 28, 2011

Touchdown

7:37 AM EST (12:37 UTC)

Lifted

7:38 AM EST (12:38 UTC)

On the ground

1 minutes

Path length

0.3 miles (0.4 km)

Path width

100 yards (91 m)

Deaths

0

Injuries

0

Property damage

$75,000

County

Wolfe County

Touchdown point

37.747, -83.372

Lift-off point

37.747, -83.367

Record number

1102280637-01

An early season severe weather outbreak occurred across eastern KY on February 28th. The first storms began moving across the area around 6am on Monday. The final warnings were issued around 915 am. The primary mode of severe weather was lines of strong to severe storms with bowing segments and embedded supercell structures. Most of the events were straight line wind damage, with a few reports of large hail and one confirmed short lived tornado that occurred in Wolfe county.

An EF-1 tornado was confirmed to have touched down 1 mile north of Gilmore. The tornados track was one quarter of a mile long and 100 yards wide. Numerous trees were snapped and scattered along the tornados path. One mobile home had its roof blow off and was also pushed about 5 feet off of its foundation. One barn was destroyed. Two other mobile homes had roof and siding damage. One outbuilding used as a sawmill was also destroyed.

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

7 minutes of warning. NWS JKL issued a tornado warning for this county at 12:30 UTC, 7 minutes before the tornado touched down, in force until 12:48 UTC.

The county was under a tornado watch, issued at 10:49 UTC and running to 15:05 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 0.10 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 05:58 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.

Jackson/J. Carroll (JKL), 18 km from the path, in the two hours either side.

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

The Jackson,KY radar (KJKL), 18 km away, was scanning. The volume nearest the touchdown began at 12:35 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 2011 tornado in KentuckyEvery tornado in Kentucky since 1950Warnings in force in Kentucky nowThe forecast where you are

25 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.