Heavy Rain and Flooding of Sept 21-22nd, 2021

Overview

Tropical moisture left over from TS Nicholas combined with a deep southeast flow, and a cold front, brought several rounds of steady to heavy rains to most of the area Sept 21st through the 22nd. Highest rainfall amounts of 4 to 8" fell in a corridor from Mount Airy to Danbury, NC, north through the Blue Ridge of Virginia, the New River Valley, and the Southern Shenandoah Valley. Most of this rain fell within a 48 hour period, and some of the heavier bands produced 3+ inches in less than 3 hours.(See rainfall total image to the right)

Flash flooding occurred during the morning of the 22nd across portions of Surry County, NC, and during the afternoon and evening of the 22nd over portions of the Virginia foothills and mountains north and east of Roanoke.

Due to recent dryness, the flooding was not widespread.

Rainfall Analysis from Sept 21-23rd, 2021


Hourly radar loop from Sep 21-22nd	Indian Rock Road Collapsed by Renick Run near Buchanan, VA (credit: Laura Burks)	Flooding in Montvale, VA along U.S. 460 (credit: Angie Rizzo)

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