National Weather Service United States Department of Commerce

Winter Storm Shifting From the Central U.S. to the Northeast; Severe Thunderstorms in the South

A winter storm will track to the Lower Mississippi River Valley by Monday and across the central Appalachians Monday night to southern New England by Tuesday. A swath of snow, sleet and freezing rain will spread from the Central Plains east into southern New England by Monday and Tuesday. Severe thunderstorms with damaging winds and tornadoes are possible over the northern Gulf Coast on Monday. Read More >

Overview

Late on Thursday, May 18th, a stationary surface front extended from central Illinois across central Missouri into south-central Kansas. In addition, a large upper level storm system was moving eastward across the central Rockies. A series of waves moving around this upper level system was interacting with the surface front and a very warm and unstable air mass to the south of the front to produce waves of strong to severe thunderstorms. The first wave moved across the area during the overnight hours on Thursday. This wave produced a total of eight tornadoes as it moved across the area. The second wave came through the area on Friday afternoon, May 19th. This wave produced a total of seven tornadoes. The third came through the area during the overnight hours on Friday and produced an additional tornado.

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Tornadoes: May 18th - 20th, 2017
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