EF2 tornado, (Cao)Clayton Arpt, New Mexico, May 23, 2010

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 mph

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

3. EF2111 to 135 mphthis tornado

   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

EF2

Date

May 23, 2010

Touchdown

8:52 PM CDT (01:52 UTC)

Lifted

9:47 PM CDT (02:47 UTC)

On the ground

55 minutes

Path length

22.0 miles (35.3 km)

Path width

440 yards (402 m)

Deaths

0

Injuries

0

Property damage

$270,000

Counties

Union and Cimarron counties

Touchdown point

36.357, -103.144

Lift-off point

36.577, -102.897

Record number

1005231952-02

A sharp dry line moved west out of west Texas and became stationary over the far eastern plains on Sunday, May 23, 2010. Meanwhile, an unseasonably deep upper level low pressure system over the Great Basin was moving slowly east toward New Mexico. The combination of the upper level disturbance approaching New Mexico and extreme instability along the dry line set the stage for widespread severe weather from Quay County northeast into Union County.

Severe thunderstorms moved across the western Oklahoma Panhandle during the evening hours. These severe storms produced a couple of tornadoes...large hail and damaging winds although no injuries were reported.

Debris on Highway 56 was seen at mile post 93. Power lines were down, barbed wire fences and hay bales were all over. In addition, a steel building from a feed lot was destroyed, a cow with a broken leg was observed on the road, and a semi truck was turned over on private property. The tornado crossed the New Mexico-Oklahoma state line approximately 8.7 miles southeast of Seneca and continued into neighboring Cimarron County, Oklahoma.

The tornado entered Cimarron County in the western Oklahoma Panhandle...about twelve miles west of Felt...from Union County in New Mexico at approximately 2035 CST. The tornado remained on the ground for about six miles in Cimarron County with a maximum path width of four hundred and forty yards. A steel windmill tower was destroyed and three twenty-four foot metal feed troughs were also destroyed along with considerable fence damage. No injuries were reported. The tornado dissipated at 2047 CST between six and seven miles west of Felt.

Two tornadoes were reported from the same parent supercell thunderstorm. This is the second tornado with shorter track farther north.

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. One was issued for the county at another hour that day.

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 01:04 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 Amarillo radar (KAMA), 181 km away, was scanning. The volume nearest the touchdown began at 01:53 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 2010 tornado in New MexicoEvery tornado in New Mexico since 1950Warnings in force in New Mexico nowThe forecast where you are

12 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.