F1 tornado, Mexico to Laddonia, Missouri, June 22, 2006

1. F040 to 72 mph

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

2. F173 to 112 mphthis tornado

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

3. F2113 to 157 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. F3158 to 206 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. F4207 to 260 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. F5261 to 318 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

F1

Date

June 22, 2006

Touchdown

1:07 PM CDT (18:07 UTC)

Path length

1.0 miles (1.6 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

County

Audrain County

Touchdown point

39.250, -91.930

Lift-off point

39.270, -91.900

Record number

669

A severe storm with downburst winds, hail and several tornadoes moved through Audrain County. The first of four tornadoes in Audrain County briefly touched down 6.4 miles north northwest of Mexico, about three quarters of a mile west of Route 15 and just south of Highway T. Several large trees were uprooted or snapped off along the tenth of mile damage path. Some of the branches caused minor damage to the roof and side of a home and a machine shed. No injuries were reported.

A severe storm with downburst winds, hail and several tornadoes moved through Audrain County. The second of four tornadoes in Audrain County briefly touched down 5.6 miles north northwest of Mexico, about half a mile east of Route 15. A large machine shed was totally destroyed with debris from the shed displaced 300 yards to the east. Numerous trees were blown down and a home sustained moderate roof damage. The tornado traveled to the east for about a mile before lifting and dissipating. No injuries were reported.

A severe storm with downburst winds, hail and several tornadoes moved through Audrain County. The third of four tornadoes in Audrain County briefly touched down 6.0 miles north of Mexico, about 1.2 miles east of Route 15. A grain bin was destroyed and several large trees were topped along the quarter of a mile path. No injuries were reported.

A severe storm with downburst winds, hail and several tornadoes moved through Audrain County. The last of four tornadoes in Audrain County touched down 1 mile northeast of Laddonia, in an open field. As it traveled to the northeast it moved into the southwest portions of Farber. It blew down several large trees and numerous tree limbs in town. One tree severely damaged the roof of a home in Farber. The tornado lifted and dissipated about six tenths of a mile northeast of Farber, near U.S. Route 54. No injuries were reported.

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

8 minutes of warning. NWS LSX issued a tornado warning for this county at 17:59 UTC, 8 minutes before the tornado touched down, in force until 18:30 UTC.

The county was under a severe thunderstorm watch, issued at 16:37 UTC and running to 21:30 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 Slight Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 15:48 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.

Columbia (COU), 56 km from the path, in the two hours either side.

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

The St Louis radar (KLSX), 123 km away, was scanning. The volume nearest the touchdown began at 18:05 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 2006 tornado in MissouriEvery tornado in Missouri since 1950Warnings in force in Missouri nowThe forecast where you are

22 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.