National Weather Service United States Department of Commerce

Overview

Thunderstorms fired off over the Central Plains on Saturday evening, May 25th, then quickly organized into a line of severe storms (known as a Quasi-Linear Convective System or QLCS) and began a rapid trek eastward, all the while producing damaging wind gusts. This QLCS crossed the mid-Mississippi Valley during the early morning hours on Sunday and quickly pressed eastward across the Commonwealth, reaching eastern Kentucky by early afternoon. Ahead of the line, sufficient daytime heating occurred leading to the buildup of moderate instability. Meanwhile, a dry layer aloft, aided in creating an environment highly favorable for the generation of damaging straight line thunderstorms wind gusts.

The thunderstorm line reaching the Lake Cumberland area just after midday, quickly reached the I-75 corridor shortly thereafter and continued to race through the remainder of eastern Kentucky during the afternoon. The highest wind gusts and greatest damage were observed near and south the Hal Rogers Parkway/Kentucky-80 corridor. The highest observed wind gust was 60 mph at the London-Corbin Airport at 1:51 PM. Several other gusts between 50 and 60 mph were also observed in the aforementioned corridor, though embedded elements with much higher gusts almost certainly occurred between weather observation stations. A NWS storm survey team estimated sporadic wind gusts up to 80 mph along this line of storms from central Whitley into far western Knox County where a brief, spin up tornado occurred on the east side of Corbin, near the Siler community. Those storms continued to progress east northeast and produce numerous instances of downed trees and power lines, including several instances of trees falling onto homes and other structures. One person sustained minor injuries in Clay County when they became entrapped within a collapsed structure after the storms.

By the time, the first line of storms cleared eastern Kentucky late in the afternoon, tens of thousands of electricity customers had lost their power. Another area of showers and storms followed closely behind the first line but was nowhere near as strong since much of the instability had already been depleted by the prior QLCS. Several hours of quiet conditions followed through the evening before another QLCS, which had developed over Missouri earlier in the day, dove across the Commonwealth overnight. As this third line of storms approached, it began to weaken due to limited instability recovery. Even so, several instances of wind damage were observed during the wee morning hours of the 27th, most notably at the Conley Bottom Resort on Lake Cumberland where local emergency management reported a covered dock collapse, leaving 3 individual entrapped while also damaging many boats. There were also instances of large downed trees at the resort impacting campers and vehicles. In the wake of these storms, power crews worked tirelessly to fix damaging power lines and power poles. Even so, the last power outages lingered into May 30th.

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RV Destroyed by Fallen Tree in Wayne County
(Courtesy of Wayne County Emergency Management)
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