EF1 tornado, Yukon to The Village, Oklahoma, May 7, 2008

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

May 7, 2008

Touchdown

4:57 PM CDT (21:57 UTC)

Lifted

5:09 PM CDT (22:09 UTC)

On the ground

12 minutes

Path length

7.5 miles (12.1 km)

Path width

120 yards (110 m)

Deaths

0

Injuries

0

Property damage

$150,000

Counties

Canadian and Oklahoma counties

Touchdown point

35.500, -97.722

Lift-off point

35.526, -97.604

Record number

0805071557-01

A strong upper level low pressure system moved into southwest Oklahoma, and continued moving east throughout the day. Extremely strong lift ahead of the storm system and abundant moisture allowed for widespread showers and thunderstorms to develop over much of Oklahoma. The better chances for severe convection was located along and south of a stationary boundary that setup near Interstate 44. Severe thunderstorms developed during the afternoon hours south of the boundary, with large hail, flash flooding, and tornadoes reported. Several tornadoes were reported in the Oklahoma City metro area during the evening rush hour, with damage reported from Yukon through the northern portion of the city. Other tornadoes were reported south of the city, with damage also reported in this area. The slow movement of the precipitation quickly added up, with widespread amounts of at least two to four inches of rainfall. Flash flooding became a concern as the afternoon progressed, with several reports around central Oklahoma of roads being closed. The upper level storm system moved east during the evening, with the precipitation moving east as well. Monetary damages were estimated.

The tornado developed southwest of Main Street and Mustang Road on the east side of Yukon. The tornadic winds removed part of a residence's roof near this location. Sporadic damage to trees and fences were reported as the tornado moved east northeast toward the north side of Lake Overholser. The tornado continued moving east-northeast into Oklahoma county. Monetary damages were estimated.

The tornado continued to move east-northeast from Canadian county. The tornado continued from the north side of Lake Overholser and crossed NW 39th street, damaging several bleachers next to the baseball field. Damage to trees was also noted at this location, with one tree falling on a gas plant. About 50 residents had to be evacuated due to the gas leak. An apartment complex was sustained some damage near NW 50th and Grove streets. Tree damage continued along the tornadoes path until it finally lifted near NW 60th and Meridian Avenue. One indirect injury was reported with the tornado. A Bethany woman broke her leg while she was running toward her storm shelter. No other injuries were reported. Monetary damages were estimated.

The tornado developed near NW 164th and May Avenue. Scattered tree and sign damage was reported as the tornado moved southeast toward Memorial Road and Western Avenue. Roof damage was also observed at a residence near NW 150th and Pennsylvania Avenue, and at an apartment complex northeast of Pennsylvania Avenue and Memorial Road. Monetary damages were estimated.

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 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 20:14 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 Norman radar (KTLX), 40 km away, was scanning. The volume nearest the touchdown began at 21:56 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 2008 tornado in OklahomaEvery tornado in Oklahoma since 1950Warnings in force in Oklahoma nowThe forecast where you are

10 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.