Flash Flood in Floyd County, Virginia

Flooding was observed near along Dodd Creek near Haycock Road and the Blue Ridge Parkway.

A stacked upper level low pressure system drifted from the Ohio River Valley to eastern Kentucky during the early morning hours of the 20th. South-southeasterly windflow around the low was efficient in transporting deep moisture into the area from the coastal Carolinas, allowing precipitable water values to rise into the 1.5 to 1.7 inch range along the crest of the Blue Ridge in Virginia south of Roanoke. Winds were nearly unidirectional with height around the low, with speeds varying between 15kt and 25kt between 925mb and 500mb per Storm Prediction Center Mesoscale Analysis. Most-Unstable CAPEs along the Blue Ridge varied between 500 and 750 J/Kg through the night, but increased to around 1,000 J/Kg at around 5 AM/09 UTC as a wave of energy passed across the area. Multiple bands of training cells developed along the Blue Ridge.