May 10, 2010 Tornadoes (I-40 Supercell)

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 **This webpage will continue to be updated as the event is analyzed**

Event Summary

Severe thunderstorms and several tornadoes raked much of eastern Oklahoma and portions of northwest Arkansas during the afternoon and evening hours of Monday, May 10th.  Hailstones as large as baseballs were reported, and numerous tornadoes were sighted across portions of Osage County and along the I-40 corridor from Okfuskee County eastward to Sequoyah County.

The severe thunderstorm event was a well advertised one, with data showing several days in advance that many factors would come together to create a potentially dangerous weather situation across much of the Southern Plains during the afternoon and evening hours of the 10th.  The morning of the 10th began with cool, cloudy, and drizzly conditions across much of the area.  As a strong upper level storm system moved out of the Rockies, a warm front began to lift to the northeast across the area, bringing warmer and more unstable conditions to the region.  A surface low also organized in southwest Kansas and moved to the east near the Oklahoma/Kansas border during the day.  A dryline pushed eastward from the Texas Panhandle into central Oklahoma by that evening.

Thunderstorms began to develop rapidly early in the afternoon across portions of northern Oklahoma and into Kansas to the west of Interstate 35.  The storms quickly became tornadic as they raced to the east and northeast.  One storm moved into western portions of Osage County, causing damage near Fairfax.  Toward mid to late afternoon, thunderstorms gradually began to develop further to the south along the Interstate 35 corridor in central Oklahoma.  One storm produced significant damage in the Oklahoma City metro area before moving to the east along the Interstate 40 corridor.  The storm produced several tornadoes in Okfuskee, Okmulgee, McIntosh, Muskogee, and Sequoyah counties.  Other storms during the evening also affected parts of southeast Oklahoma before moving out of the region.

 

Event Map


 
 
Maps
Maps+: Counties:
 

 Note: The numbered flags represent the EF scale rating assigned to surveyed damage.  Clicking on any icon will reveal more information or images.  The purple shading denotes additional damage areas where possible satellite tornadoes may have occurred.  These areas will be refined after further analysis. Due to GPS/mapping software differences please use the plotted tornado tracks for general reference only.

 

Damage Survey Summary

National Weather Service Tulsa employees have conducted surveys of damage across Osage County and also along the Interstate 40 corridor to determine how many tornadoes affected the area and the path length, width, and tornado strength of each.  Updated information will be posted here.

 

The tracks from the May 10th event are still considered preliminary and may be modified based on additional information that may become available to us.  Anyone with information that could enhance the record of these storms should contact the National Weather Service Office in Tulsa at 918-838-7838 during business hours or send us an email at: sr-tsa.stormreport@noaa.gov

Click here for information on the Enhanced Fujita (EF) Scale for tornado damage.

 

...OKFUSKEE COUNTY OKLAHOMA...

Tornado 1: Continuation of Cromwell Tornado in Hughes County A tornado that moved across portions of northern Hughes County, including the town of Cromwell, crossed into southwestern Okfuskee County 3 miles west of Bearden at about 6:35 PM CDT.  The tornado moved northeast and dissipated just south of Interstate 40 about 3 miles north of Bearden at about 6:47 PM CDT.  Many trees were damaged in the path, which was about 5 miles long and had a maximum width of 400 yards.  Based on the tree damage, the tornado was rated EF1 on the Enhanced Fujita Scale with maximum wind speeds of up to 95 mph.

Continuation of Cromwell Tornado in Hughes County
Began: 3 miles west of Bearden
Ended: 3 miles north of Bearden
6:35 PM to 6:47 PM CDT
Rating: EF1
Peak winds: near 95 mph
Path length in Okfuskee County: 5 miles
Maximum path width in Okfuskee County: 400 yards


Tornado 2: Clearview Tornado A tornado developed about 6.5 miles south of Okemah at about 6:45 PM CDT.  The tornado moved northeast and dissipated about 2.75 miles north-northwest of Pharoah at about 7:10 PM CDT.  Trees were snapped, power poles were downed, homes were damaged and several outbuildings were destroyed within the 14 mile long path that was a maximum of 1000 yards wide.  Based on this damage, the tornado was rated EF1 with peak winds near 105 mph.

Clearview Tornado
Began: 6.5 miles south of Okemah
Ended: 2.75 miles north-northwest of Pharoah
6:45 PM to 7:10 PM CDT
Rating: EF1
Peak winds: near 105 mph
Path length: 14 miles
Maximum path width: 1000 yards
 

Tornado 3: Boley Tornado A tornado began about one mile south of Boley at about 7:17 PM CDT, moved northeast, and dissipated about 10.5 miles north-northeast of Okemah at about 7:35 PM CDT.  The tornado produced significant tree damage, removed the roof of the Boley Police Department building, downed power poles, and damaged homes.  The path length was about 15. 5 miles long and had a maximum width of 650 yards.  The tornado was rated EF1 with peak winds near 105 mph.


Boley Tornado
Began: 1 mile south of Boley
Ended: 10.5 miles north-northeast of Okemah
7:17 PM to 7:35 PM CDT
Rating: EF1
Peak winds: near 105 mph
Path length: 15.5 miles
Maximum path width: 650 yards

 

 
...OKMULGEE COUNTY OKLAHOMA...

Tornado 4: Bryant Tornado  A brief tornado developed a half mile northeast of Bryant, moved east, and dissipated about 1 mile east-northeast of Bryant.  The tornado damaged trees and a home.  The path length was about a half mile long and was up to about 100 yards wide.  It was rated EF0 with peak winds near 80 mph.

Bryant Tornado
Began: 0.5 miles northeast of Bryant
Ended: 0.75 miles east-northeast of Bryant
7:03 PM CDT
Rating: EF0
Peak winds: near 80 mph
Path length: 0.5 miles
Maximum path width: 100 yards

 

Tornado 5: Lake Henryetta Tornado A strong tornado developed at about 7:04 PM CDT about 3 miles south-southwest of the Henryetta Airport, moved northeast, and dissipated at about 7:21 PM CDT about 2 miles northeast of Dewar.  The tornado destroyed a boat dock and a mobile home on Henryetta Lake, damaged several other homes and mobile homes, produced major tree damage, and destroyed outbuildings.  The path length was about 10 miles and was up to 1250 yards wide.  The tornado was rated EF2 with peak winds near 115 mph.

Lake Henryetta Tornado
Began: 3 miles south-southwest of Henryetta Airport
Ended: 2 miles east-northeast of Dewar
7:04 PM to 7:21 PM CDT
Rating: EF2
Peak winds: near 115 mph
Path length: 10 miles
Maximum path width: 1250 yards

 

...MCINTOSH COUNTY OKLAHOMA...

Two tornados occurred in McIntosh County, though several other tracks are likely to come out to the surveys, especially south of Lake Eufaula in McIntosh Co. where storm chasers observed several satellite tornadoes and the survey team observed additional torndao damage.  Another area of damage that is being looked at closely is a couple miles southeast of Hitchita, which may be the result of an additional satellite tornado of the tornado that moved across Lake Eufaula. 

Tornado 6: Eufaula Lake Tornado  (Click here to jump to tornado and damage photos)
Began: South of Lake Eufaula about 6.5 miles southwest of Hitchita
Ended: 7 miles east of Hitchita, north-northeast of Highway 72/Highway 266 intersection
7:23 PM to 7:41 PM CDT
Rating: EF2
Peak winds: near 115 mph
Path length: 13 miles
Maximum path width: 800 yards


Tornado 7: Rentiesville Tornado
Began: 1.5 miles southeast of Rentiesville
Ended: 7 miles east-northeast of Rentiesville
7:46 PM to 7:56 PM CDT
Rating: EF1
Peak winds: near 110 mph
Path length: 6.5 miles
Maximum path width: 800 yards

 

...MUSKOGEE COUNTY OKLAHOMA...

Tornado 8: Warner Tornado
Began: 3 miles north-northwest of Warner
Ended: 4 miles northeast of Shady Grove
7:56 PM to 7:58 PM CDT
Rating: EF1
Peak winds: near 105 mph
Path length: 2 miles
Maximum path width: 400 yards

 
...MUSKOGEE/SEQUOYAH COUNTIES OKLAHOMA...

The Tenkiller Lake/Webbers Falls Tornado produced damage at two parks.  The first was Brewer Bend Park, where large trees were uprooted and mobile camping trailers were rolled and damaged.  The tornado then uprooted large trees at the U.S. Army Corps of Engineers Tenkiller Project Office before crossing the lake to the Lake Tenkiller State Park.  As a park ranger was in the process of warning the campers in the cabin area of the park, the tornado struck.  The ranger's truck was pushed sideways on the road as trees fell in various directions around him.  Luckily, he was uninjuried.  The boat docks on the west side of the park were also damaged by the tornado.  The steel cables that hold the docks in place were snapped as the tornado pushed the docks further into the cove. 

Tornado 9: Tenkiller Lake/Webbers Falls Tornado  (Click here to jump to damage photo)
Began: 5.75 miles northwest of Webbers Falls
Ended: 2.5 miles north of Box
8:06 PM to 8:20 PM CDT
Rating: EF1
Peak winds: near 110 mph
Path length: 13 miles
Maximum path width: 1250 yards

 
...SEQUOYAH COUNTY OKLAHOMA...

Tornado 10: Marble City Tornado
Began: 1.5 miles west of Dwight Mission
Ended: 0.5 miles southeast of Marble City
8:27 PM to 8:31 PM CDT
Rating: EF1
Peak winds: near 105 mph
Path length: 4 miles
Maximum path width: 500 yards

 

...OSAGE COUNTY OKLAHOMA...

Tornado 11: Burbank/Fairfax Tornado A tornado likely entered Osage County from Noble County.  This will be confirmed through coordination between the Norman and Tulsa National Weather Service Offices. Tornado damage began in Osage County at approximately 5:14 PM CDT 12.3 miles southwest of Burbank.  The tornado traveled to the northeast at near 60 mph and was on the ground for 11 miles, lifting 3.1 miles south of Burbank.  The tornado was 1.4 miles wide and was part of a 2.6 mile wide damage swath.  The larger damage swath is a combination of tornado damage and strong rear flank downdraft winds that reached near 85 mph in a few locations.  The tornado was given a preliminary rating of EF1 with peak winds of the tornado estimated near 110 mph. The tornado significantly damaged 2 homes, along with several barns and outbuildings.  The tornado lifted around 5:25 PM CDT.  Click here to jump to damage photo.

Burbank/Fairfax Tornado
Began in Osage County: 12.3 miles southwest of Burbank
Ended in Osage County: 3.1 miles south of Burbank
5:14 PM to 5:25 PM CDT
Rating: EF1
Peak winds: near 110 mph
Path length: 11 miles
Maximum path width: 1.4 miles

 

 

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Meteorological Data

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Storm Reports

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