Lone Grove, OK EF4 Tornado – February 10, 2009

lone grove tornado

Image of the Lone Grove Tornado extracted from the February 2009 Storm Data Publication

SPC Stats:

Path length: 36.99 miles

Width:  880 yards

Fatalities:  8

Injuries:  0

Rating:  EF4

County:  Montague (TX), Jefferson, Love, Carter (OK)

10 tornadoes occurred across the Plains on February 10, 2009.  The most significant tornado of the day was rated EF4.  It tracked almost 37 miles with a max width of 880 yards. 

The tornado began its track south of Spanish Fort in Montague County, TX.  It tracked 2.36 miles to the Red River.  Winds were estimated between 95-100 mph (EF1).  Most of the damage was to pecan trees up to 30 inches in diameter south of Spanish Fort.  Witnesses reported a multi-vortex tornado that was starting to organize into a larger tornado as it crossed the Red River into Oklahoma.

This tornado moved through parts of Jefferson, Love and Carter Counties in Oklahoma.  Most of the damage early in the Oklahoma track was sporadic to some structures and to trees.  Once the tornado reached Carter County, its width had grown to 880 yards.  The twister produced EF4 tornado in the Lone Grove area and in the Majestic Hills area north of Ardmore.  Max winds were estimated between 166 to 200 mph.

Per the Storm Data Publication, "Numerous mobile homes were completely obliterated with few recognizable pieces left." Also, "numerous vehicles were rolled or thrown, some for considerable distances."

In the Majestic Hills Neighborhood, at least 8 homes and a small private school were destroyed.

In Carter County, a total of 114 homes were damaged/destroyed.  Debris was carried as far away as Sulphur (over 40 miles away from Lone Grove).

The NWS Norman summary of this event mentions the tornado crossed into far Southern Murray County, ending 5 miles SE of Dougherty.  This county is not included in the SPC or NCDC Database or in Storm Data.

There were 8 fatalities in the Lone Grove area.  Six occurred in mobile homes, one was in a well-built home that sustained EF4 damage and one fatality occurred when a truck was hit by the tornado on I-55, killing the driver.

Fri, Feb 13, 2009 – 1 · The Daily Oklahoman (Oklahoma City, Oklahoma, Oklahoma, United States of America) · Newspapers.com
The SPC Database does not list injuries for this event.  This is an error that is also found in the Storm Data Narrative stats area.  There were 46 injuries.  This is included in the NCDC Database and the NWS Summary.

This tornado is the strongest to hit in Oklahoma in February since records began in 1950.

Tornado Path

Click map to enlarge.

SPC coordinates:  Start: 33.93 / -97.62   End:  34.26 / -97.113      

Note:  Exact tornado path may not be straight and/or continuous.

Radar and Damage Photos via the NWS Norman Summary

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Videos

Discrepancies:

We gathered information for this event from the SPC & NCDC Databases and the February 2009 Storm Data Publication and Thomas Grazulis in Significant Tornadoes and found the following differences:

Injury Count:

  • SPC has 0 injuries.
  • NCDC has 46 injuries.
  • Storm Data has 0 injuries in the stat area but 46 injuries in the body of the summary.

Counties in Path:

  • The NWS Norman summary of this event mentions the tornado crossed into far Southern Murray County, ending 5 miles SE of Dougherty. This county is not included in the SPC or NCDC Database or in Storm Data.