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Tropical Storm Imelda Forms; Another Round of Heavy Rain and Potential Flooding in the Southwest

Tropical Storm Imelda has formed near the Bahamas Sunday afternoon, and continues to bring heavy rainfall. Tropical storm conditions are possible along the east coast of Florida beginning Monday. The risk of significant wind impacts from Imelda along the Southeast coast are decreasing. Another round of showers and storms with a heavy rain and flash flood threat will continue in the Southwest today Read More >

Overview

Periods of rain worked back into eastern Kentucky early on February 20 as a warm frontal boundary lifted north across the Commonwealth. A cold front brought additional rainfall through the afternoon and evening, before drier conditions worked into eastern Kentucky during the morning of February 21.

Rain quickly spread back north that evening into the 22nd with southeastern Kentucky continuing to see prolonged light rain into the afternoon of the 23rd. A cold front brought additional rain to much of eastern Kentucky late on the 23rd.

A spike in moisture ahead of this front resulted in additional moderate to heavy rain and high rainfall rates across portions of eastern Kentucky late on the 23rd. The convection ahead of the cold front that evening resulted in the majority of the flooding and flash flooding issues across eastern Kentucky. Showers and thunderstorms capable of heavy rainfall trained over parts of Wayne, Pulaski, Rockcastle, and other counties along the I-75 corridor, resulting in deadly flash flooding and river flooding along the Cumberland River. Later in the evening, the bulk of the rainfall shifted north to counties along the Mountain Parkway. Flash flooding and river flooding occurred in Powell, Wolfe, Breathitt, Magoffin, and Johnson Counties. Lighter rainfall continued into the night as flooding issues remained widespread into the 24th.

Rainfall amounts from this event ranged from near 2 inches in portions of the Bluegrass region and northeast Kentucky, to greater than 4 inches across locations in southern and southeast Kentucky.

This additional water on top of saturated ground continued to promote mud and rock slides across eastern Kentucky, complete with power outages from fallen debris and trees. Pikeville experienced a massive rockslide early on February 22, resulting in several cars and a building being damaged. Other impacts included countless roads being inundated with standing water, pavement and water pipes breaking, water threatening homes, roads and bridges being washed away, and rising lake levels.

Of the 33 counties across eastern Kentucky, at least 27 were forced to declare State of Emergencies due to rainfall during and before this event. This included Knott County due to over $150,000 in county road damages. Beattyville, Clay City, Harlan, Hazard, Jenkins, Monticello, Paintsville, Pikeville, Salyersville, Stanton, West Liberty, and Whitesburg also declared State of Emergencies. Additionally, the Kentucky Governor declared a State of Emergency across the entire Commonwealth.

The persistent rainfall of the winter season and the amount of rainfall from this event led to Lake Cumberland reporting their highest lake level of 756.52 feet on February 26th, breaking the old record of 751.69 feet dating back to May 1984. As a result, Wolf Creek Dam had to release at a record discharge level of 59,880 cubic feet per second. Cave Run Lake also rose to within 6 feet of their record pool elevation. Buckhorn Lake came within 10 feet of their all-time record, partially resulting in Kentucky Highway 257 near Confluence having flood waters cover the highway isolating 40 to 50 families for numerous days following the end of the flooding rains.

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Flooding in Rockcastle County (Photo courtesy of Jordan Smith)

 

Laurel River Lake Spillway (Courtesy of Laurel County Emergency Manager)

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