Much like the events of May 19th and May 20th in mid May 2013, a potent set of ingredients came together during the afternoon hours of the May 31, 2013 for a major severe weather episode over central Oklahoma. A nearly stationary front was draped from southwest to northeast through central Oklahoma, with a dryline mixing eastward into portions of west central and southwest Oklahoma by mid afternoon. During the heat of the day, extreme instability developed ahead of the dryline and south of the frontal boundary, placing Oklahoma city in a very volatile severe weather environment. Storms erupted near the dryline-front intersection by late afternoon. These storms quickly became severe with strong mid level rotation.
As the southernmost storms moved east into better moisture and instability, they rapidly became tornadic. The first tornado touched down in Kingfisher county and produced little to no damage. The second tornado to form would go on to be one of the most powerful tornadoes sampled by mobile radar and also the widest known tornado on record. This tornado traveled eastward toward Union City and El Reno, producing extensive crop and property damage along the way. Several motorists were also killed by the tornado as it overtook them. This storm would go on to produce several other tornadoes in the Oklahoma City metro and a line of training supercells would cause historic flash flooding in the metro area. The two images below provide some idea of the surface conditions in place.
The latest Public Information Statements issued by the NWS Norman forecast office can be found here.
Surveys conducted by crews in the NWS Norman and NWS Tulsa forecast areas revealed that 19 tornadoes occurred during the afternoon and evening of May 31, 2013. A total of 12 tornadoes occurred in the NWS Norman forecast area in Canadian, Oklahoma, Cleveland, and Grady Counties in central Oklahoma. A total of 7 tornadoes occurred in the NWS Tulsa forecast in Osage, Washington, Nowata, Rogers, and Delaware Counties in northeastern Oklahoma.
|1||05/31/2013||1635-1637||1||50||EF0||0||0||Kingfisher||1 NE - 2 NE Omega|
|2||05/31/2013||1655-1656||0.3||30||EF0||0||0||Canadian||7 S Calumet|
|3||05/31/2013||1703-1744||16||4576||EF3||8||26||Canadian||8 S Calumet - 5.5 S El Reno - 6 SSW Richland|
|4||05/31/2013||1712-1713||0.5||120||EF0||0||0||Canadian||~6.5 SSW El Reno|
|5||05/31/2013||1713-1714||0.5||350||EF0||0||0||Canadian||~5.5 SW El Reno|
|6||05/31/2013||1718||0.1||50||EF0||0||0||Osage||2 NW Hulah|
|7||05/31/2013||1729-1741||5||150||EF2||0||1||Canadian||6 W - 4.5 SW Yukon|
|8||05/31/2013||1730-1737||2.5||200||EF1||0||0||Osage||15 WSW - 12.6 WSW Pawhuska|
|9||05/31/2013||1738-1740||1.2||200||EF1||0||0||Washington||6.8 NE - 7.9 NE Copan|
|10||05/31/2013||1751-1809||6||600||EF1||0||0||Canadian/ Oklahoma||4 SE Yukon - W OKC (SW 15th/Meridian; 5 WSW Downtown OKC)|
|11||05/31/2013||1755-1757||0.5||50||EF0||0||0||Canadian||6 S El Reno|
|12||05/31/2013||1821-1822||1.1||310||EF0||0||0||Nowata||10.4 ESE - 11.1 E South Coffeyville|
|13||05/31/2013||1835-1837||0.5||200||EF0||0||0||Oklahoma||SE OKC (0.3 NNE SE59/Bryant)|
|14||05/31/2013||1842-1843||1||100||EF1||0||0||Cleveland||SW OKC (near SW 119/Meridian)|
|15||05/31/2013||1845||0.2||50||EF0||0||0||Grady||2 NE Tuttle|
|16||05/31/2013||1853-1855||1.1||300||EF1||0||8||Oklahoma||SW OKC (near SW59/Penn - SW59/Western)|
|17||05/31/2013||1921-1926||3.5||320||EF1||0||0||Rogers/ Nowata||4.4 NNW Talala - 1.3 SW Watova|
|18||05/31/2013||1927-1935||4.8||350||EF1||0||2||Rogers/ Nowata||4.9 NNE Talala - .7 ENE Watova|
|19||05/31/2013||2223-2227||1.8||500||EF0||0||0||Delaware||5 SW - 4 SW Grove|
The map below shows the outline of the El Reno tornado (light blue polygon with dark shading), the path of the tornado center (thick black line) and times the tornado center was along that line (black and white targets).
Phased Array Radar Loop: Reflectivity
The above image covers general tornado safety information. This graphic was published on our Facebook and Twitter pages several hours before the event. Line by line safety info was also retweeted throughout the event as it was occuring.
The above image covers tornado safety information for those in vehicles. This graphic was published on our Facebook and Twitter pages several hours before the event. Line by line safety info was also retweeted throughout the event as it was occuring.If you have any pictures or personal accounts of weather phenomena or storm damage, please email them to us at firstname.lastname@example.org or email@example.com and indicate whether or not we have permission to use them on our web-page.