Information on this webpage is considered preliminary and will continue to be updated as the event is analyzed.

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, submit an online storm report, or send us an email at: sr-tsa.stormreport@noaa.gov

 

Event Summary - April 14, 2011 Tornado and Severe Thunderstorm Event (updated 5/06/11 4:00 pm)

A strong low pressure system moved out of the Rockies and into the Southern Plains on April 14, 2011.  A surface low deepened across central Kansas by early afternoon, with a sharp dryline extending from the surface low southward along the I-35 corridor.  Moisture continued to increase from northeast Texas into eastern Oklahoma and northwest Arkansas ahead of the dryline, with dewpoints rising into the low to mid 60s.  Initial convection occurred along the dryline from near Ponca City to Ardmore at around 3 pm CDT.  These storms quickly matured into supercells as they moved further east into eastern Oklahoma due to favorable wind profiles and instability.  Storms continued to increase as the dryline slowly moved east during the evening.  A 100+ knot westerly upper-level jet was also present across northern Texas, which helped to further enhance the severity of the storms.  A trailing cold front overtook the dryline during the late evening hours, leading to additional development and a line of storms across western Arkansas. 

Reports of tornadoes and hail to the size of golf balls and softballs were received by the NWS Office in Tulsa through the evening hours as the storms moved through eastern Oklahoma and northwest Arkansas.  The storms moved further east into Arkansas and out of the NWS Tulsa area of responsibility by around 1:30 am.

The National Weather Service Office in Tulsa sent teams in the field to survey the damage from the April 14th severe thunderstorms.  As more information becomes available about the tornados, including EF rating and estimated size, this website will be updated.  See the map below for preliminary local storm reports.   

Preliminary Confirmed Tornado Information  Times are listed in CDT (last updated 4:00 PM CDT 5/6/11):

Dyer Tornado (Crawford County)

Began: 10:35 pm,  2.3 miles W Dyer                          

Ended: 10:44 pm,  1.6 miles N Dyer

Path Length: 3 miles       Max Path Width: 250 yards

EF Rating:  EF1               Max Wind Speed: 100 mph

Impact: 2 permanent homes damaged; trees snapped and uprooted

 

Branch Tornado (Franklin County)

Began: 11:08 pm,  1.6 miles SSE Charleston                          

Ended: 11:16 pm, 1 mile SE Branch

Path Length: 4.8 miles        Max Path Width: 350 yards

EF Rating:  EF1                    Max Wind Speed: 105

Impact: Trailer rolled; permanent home roof damaged; trees snapped; 2 injured

Bache Tornado (Pittsburgh County)

Began: 7:14 pm,  5.9 S Bache                          

Ended: 7:25 pm,  2.2 SE Bache

Path Length: 5.5 miles       Max Path Width: 300 yards

EF Rating:  EF1                   Max Wind Speed: 105

Impact: Trees snapped and uprooted

 

Stanley Tornado (Pushmataha County)

Began: 8:35 pm, 10.5 SW Clayton

Ended: 8:47 pm, 3.7 WSW Clayton

Path Length: 7 miles               Max Path Width: 1000 yards

EF Rating:  EF2, max wind speed 115 mph

Impact: numerous large trees snapped or uprooted 

Jumbo Tornado (Pushmataha County)

Began: 8:12 pm, .5 WSW Jumbo

Ended: 8:15 pm, 2.6 ENE Jumbo

Path Length: 3 miles                Max Path Width: 400 yards

EF Rating:  EF1, max wind speed 100 mph

 

South of Daisy Tornado (Atoka/Pushmataha/Pittsburg Counties)

Began: 8:58 pm, 0.8 S Daisy in Atoka County 

Ended: 9:16 pm, 4.5 SE Weathers in Pittsburg County

Path Length: 14.3 miles           Max Path Width: 1100 yards

EF Rating:  EF1, max wind speed 105 mph

 

Burbank Tornado (Osage County)

Began: 4:12 pm, 1.6 miles ENE Burbank                     

Ended: 4:13 pm, 1.9 miles NE Burbank

Path Length: 0.33 miles      Max Path Width: 40 yards

EF Rating:  EF0, max wind speed 75 mph

Damage: damage to a few trees

 

Hominy Tornado (Osage County)

Began: 5:00 pm, 2.6 miles N Hominy                          

Ended: 5:03 pm, 3.4 miles NE Hominy

Path Length: 1.03 miles      Max Path Width: 275 yards

EF Rating:  EF2, max wind speed 115 mph

Damage: damaged a home, a business, and snapped poles

 

Howe Anitcyclonic Tornado (Le Flore County)

Began: 9:35 pm, 2.1 miles WSW Howe

Ended: 9:37 pm, 1.7 miles NW Howe

Path Length: 1.5 miles          Max Path Width: 300 yards

EF Rating:  EF1                     Max Wind Speed: 100 mph

Impact: Barn damaged; trees snapped and uprooted; anticyclonic

Poteau/Wister Tornado (Le Flore County)

Began:  9:23 pm,  2.9 miles SSE Wister

Ended: 9:37 pm, 3.2 miles S Poteau

Path Length: 7 miles         Max Path Width: 440 yards

EF Rating:  EF1                 Max Wind Speed: 105 mph

Impact: Mobile home rolled; permanent home roof damage; trees snapped and uprooted; 3 injured

 

Talihina Tornado (Latimer/Le Flore County)

Began: 8:28pm,  4.6 miles WSW Talihina    

Ended: 8:37pm,  1/2 mile NNW Talihina

Path Length: 4.6 miles         Max Path Width: 600 yards

EF Rating:  EF1                    Max Wind Speed: 110 mph

Impact: Trees snapped and uprooted; home damaged; barn damaged

 

Yanush Tornado (Latimer County)

Began: 9:08 pm,  4 WSW Yanush          

Ended: 9:22 pm,  2.4 NNE Yanush

Path Length: 6 miles         Max Path Width: 500 yards

EF Rating:  EF0                Max Wind Speed: 85 mph

Impact: trees uprooted; large tree branches snapped

Dewey Tornado (Washington/Nowata Counties)

Began: 6:11 pm, 7.2 miles ESE Dewey                          

Ended: 6:14 pm, 7.9 miles E Dewey

Path Length: 1.6 miles      Max Path Width: 200 yards

EF Rating:  EF1, max wind speed 105 mph

Damage: Several homes damaged; 5th wheel trailer overturned; several trees damaged

 

Ochelata Tornado (Washington County)

Tornado #1 Began: 5:39 pm, 1 W Ochelata       

Tornado #2 Began: 5:44 pm, 2 N Ochelata

Path Length/Max Path Width: both were brief touchdowns

EF Rating:  EF0, no known damage from either tornado

 

Wagoner Tornado (Wagoner County)

Began: 8:18 pm, 2.8 NW Wagoner                        

Ended: 8:22 pm, 3.1 NNW Wagoner

Path Length: 1.8 miles         Max Path Width: 290 yards

EF Rating:  EF1, max wind speed 110 mph

 

Lake Eucha Tornado (Delaware County)

Began: 7:47 pm, 1.4 SSE Eucha                        

Ended: 7:48 pm, 1.3 SE Eucha

Path Length: 0.5 miles       Max Path Width: 100 yards

EF Rating:  EF2, max wind speed 125 mph

 

Information from this event is still considered preliminary and will be modified based on additional information that may become available to us.  Anyone with information that could enhance the record of this event 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, or submit an online report.

 

 Image captions below the image.  Click on image to open a larger version in a new window. Additional images can be found in the Event Map below.

Visible Satellite image of storm system
Tornado near Okfuskee
Supercell in Okfuskee County
Visible Satellite Image of the storm system affecting eastern OK. Image valid 6:45 pm CDT 4/14/2011
Storm Spotter Brian Squitieri reported a brief tornado 1N Okfuskee Photo courtesy of Brian Squitieri
Supercell over Okfuskee County Photo courtesy of Brian Squitieri
funnel near burbank burbank funnel

 
Funnel/possible tornado near Burbank (Osage County) Photo courtesy of Dorian Burnette
Funnel/possible tornado near Burbank (Osage County) Photo courtesy of Dorian Burnette
 
radar images of Hominy supercell radar images of wagoner supercell radar images of the Wister supercell
Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Hominy area.  KINX radar is to the lower right of the image. Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Wagoner area.  KINX radar is to the upper left of the image.  Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Wister area.  KSRX radar is to the upper right of the image.
radar images of Yanush supercell radar image of alderson supercell radar images of Okfuskee supercell
Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Yanush area.  KSRX radar is to the upper right of the image. Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Bache area.  KSRX radar is to the upper right of the image. Radar reflectivity (left) and storm relative velocity (right) of the supercell and strong rotation that affected the Okfuskee area.  KINX radar is to the upper right of the image.
Wagoner tornado damage Lake Eucha tornado damage damage from Dewey tornado
Roof missing from a permanent home from Wagoner tornado. Mobile home destroyed by Lake Eucha tornado. Damage from Dewey tornado.
Hominy tornado damage tree damage from Burbank tornado  
Damage to commercial building from Hominy tornado. Tree damage (and fire burns) from Burbank tornado.  

 

Preliminary Event Impact Map This map will be updated as additional information is received.  Click on the icons within the map for additional details and/or images related to that impact.  Tornado information can be found by clicking on the track.

Tornado Tracks: Due to mapping/GPS software differences and road accessibility along the track, use the plotted tracks for general reference only. Tornado tracks may be updated and/or changed due to storm damage surveys, data analysis, and eyewitness reports.

Storm Survey: Colored icons represent the Storm Survey rating assigned to surveyed damage. Click on the icon for additional information and available photos. You may need to zoom in tightly to see all the available data points when data points are logged close to one another.  Links to photos are available in the upper portion of the text window that opens when you click on one of the colored data icons or points.

Hail, Wind, and Flood Reports: Click on the icon for the time, location, and description of the storm report. Click here to submit your storm report.

Other Data: Additional data or images from the event.

Survey Legend

 


 
 
Maps
Maps+: Counties:


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.