Why is "Tornado outbreak of May 15–17, 2013" trending?

Wikipedia Overview

A small but damaging tornado outbreak impacted northern Texas, south-central Oklahoma, northern Louisiana, and northern Alabama in mid-May 2013. The outbreak was the result of an upper-level shortwave trough that tracked across the Southern Plains of the United States. An associated low-pressure area and atmospheric instability resulted in the formation of tornadoes across northern Texas and Oklahoma on May 15. Afterwards the storm system weakened as it tracked eastward, though six additional tornadoes were reported in Texas, Louisiana, and Alabama in the two days following May 15. Over a period of nearly two days, the storm system produced 26 tornadoes in four states. The strongest of these was an EF4 tornado which struck Hood County, Texas on May 15. However, on May 16 and May 17 no tornadoes were confirmed to have been stronger than EF1 intensity. In addition to tornadoes, large hail was reported, peaking at 4 in (10 cm) in diameter near Mineral Wells, Texas on May 15.