e/May 1957 Mid-South tornado outbreak

Information
has gloss	eng: The Mid-South tornado outbreak occurred from eastern New Mexico to Oklahoma, western Arkansas, southern Kansas, eastern Colorado, and southeastern Wyoming on May 24–25 1957. Thirty-eight tornadoes touched down over the area, most of which took place across northern and western Texas, in addition to southern Oklahoma. The strongest tornado was rated at F4 status south of Lawton. Unusually, some tornadoes touched down during the early morning hours, whereas most Plains tornadic systems are nocturnal. Four deaths were attributed to the tornadic activity. The tornado outbreak was related to the arrival of a strong shortwave trough.
lexicalization	eng: May 1957 Mid-South tornado outbreak
instance of	e/Tornado outbreak