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:


Event Summary - April 19, 2011 Tornado and Large Hail Event (updated 5/6/11 4:00 pm)

Isolated supercells developed on the afternoon of April 19, 2011 as a cold front overtook a dryline and moved into an unstable airmass over far eastern Oklahoma and western Arkansas.  One supercell tracked from Atoka County into Pushmataha and Le Flore Counties, prompting numerous tornado warnings and several reports of tornadoes.  Large hail to the size of golf balls to tennis balls was also reported with this supercell.  Additional supercells affected Washington, Benton, Carroll, and Madison Counties in northwest Arkansas.  Golf ball to baseball sized hail were reported with these storms. 

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, 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.

large hail U of A campus
baseball hail Huntsville, AR
Large hail on the University of Arkansas campus. Photo taken at UAPD on Razorback Rd. in Fayettville.  Photo courtesy of Scott Fendley, Washington Co. Emergency Management
Very large hail in northwest Arkansas.  Photo by Codee Reynolds, courtesy of KY3
Rainfall estimate map illustrates areas affected by the April 19, 2011 severe thunderstorms.
hail in fayetteville golf ball hail north of Berryville  
Golfball size hail in Fayettville.  Photo courtesy of Bill Smith Golfball size hail north of Berryville. Photo courtesy of KY3  


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