Deep moisture returned to the lower mid-Atlantic region during the period August 12th - 15th, with precipitable water values ranging from 1.6 to 1.9 inches each day.  A frontal boundary stalled near the Interstate 64 corridor provided a trigger for convection, supported aloft by passing upper level disturbances. Strong daytime heating contributed to deep instability, resulting in thunderstorms with high rainfall rates.  Light winds aloft resulted in mean wind speeds generally 10 knots or less, indicating slow cell movement. Considering the moist antecedent conditions, flash flood watches were in effect each day through this period.

Heavy Rain in WILKES, NORTH CAROLINA
From 13-AUG-20 14:30:00 to 13-AUG-20 16:00:00 (EST-5)
Location: NORTH WILKESBORO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A personal mesonet station recorded a storm total of 1.95 inches of rain.  1.89 inches fell within an hour, roughly a 5-year event per NOAA Atlas 14 point frequency estimates.

Heavy Rain in WILKES, NORTH CAROLINA
From 13-AUG-20 07:00:00 to 15-AUG-20 07:00:00 (EST-5)
Location: NORTH WILKESBORO ARP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Cooperative Weather Observer in North Wilkesboro, NC recorded a 2-day total, for thunderstorms occurring during the afternoons on the 13th (2.89) and 14th (2.20), of 5.09 inches of rain.  This was the 8th wettest 2-day period for this station during the month of August, with station records dating back to September 1921.

Flash Flood in WILKES, NORTH CAROLINA
From 13-AUG-20 15:14:00 to 13-AUG-20 17:00:00 (EST-5)
Location: NORTH WILKESBORO
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain from a thunderstorm caused an unnamed creek to overflow its banks, and cause flooding of buildings nearby the intersection of 2nd Street and Statesville Road (Highway 115) in the town of North Wilkesboro.  The road reopened after flood waters receded.

Flash Flood in SURRY, NORTH CAROLINA
From 13-AUG-20 23:01:00 to 14-AUG-20 01:30:00 (EST-5)
Location: LOW GAP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 3 and 5 inches of rain fell fell over a 2 to 3-hour period across nearly the entire drainage basin for Ramey Creek near the community of Lowgap.  Per FLASH data at the 3-hour period, these amounts were anywhere from 1.8 to 2.5 times flash flood guidance, or a 200+ year event.  CREST unit streamflows were over 1,000 cfs/mi^2, indicating a major flooding event was possible.  However, the area where the rain occurred is heavily wooded and very sparcely developed.  Given the late hour at which the rain occurred, there were very few eye witness accounts of what actually happened.  The only report received was early in the event, likely before maximum flooding was achieved, where over six inches of water was observed flowing across Ramey Creek Road due to flooding from Ramey Creek. This heavy rain also caused a small slide debris flow onto the road.

Flash Flood in WATAUGA, NORTH CAROLINA
From 12-AUG-20 15:36:00 to 12-AUG-20 17:36:00 (EST-5)
Location: DEEP GAP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Doppler radar indicated rainfall amounts of 1.5 to 2 inches in the Stoney Fork area, with CREST unit streamflow indicating 550 cfs/mi^2.  FLASH data indicates this rainfall was roughly a 10-year event.  Runoff from this rainfall caused a creek running adjacent to Lawrence Greene Road to overflow its banks onto the roadway, making travel impossible until the water receded.

Debris Flow in WILKES, NORTH CAROLINA
From 12-AUG-20 16:47:00 to 12-AUG-20 16:47:00 (EST-5)
Location: DENNY
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rain caused a debris flow near the 2500 block of Gladys Fork Road.