A stationary front, draped across the foothills and Piedmont and supported aloft by multiple waves of energy entering from the Tennessee Valley, provided the triggers for  scattered slow-moving thunderstorms to develop during each afternoon across the mountains east of Interstate 81.  Deep tropical moisture was in place across the region in the wake of Tropical Storm Isaias.  In addition, strong daytime heating provided the instability to allow storms to produce heavy rain, 2-4 inch per hour rainfall rates at times, while light winds aloft made for slow storm movement.

Heavy Rain in ASHE, NORTH CAROLINA
From 07-AUG-20 13:40:00 to 07-AUG-20 16:00:00 (EST-5)
Location: NETTLE KNOB
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A home mesonet station recorded 4.46 inches of rain which fell in a little over 2 hours.  This equated to roughly a 150-year rainfall event per NOAA Atlas 14 point rainfall frequency analysis.

Heavy Rain in ASHE, NORTH CAROLINA
From 07-AUG-20 13:50:00 to 07-AUG-20 15:50:00 (EST-5)
Location: FLEETWOOD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A home mesonet station recorded 4.13 inches of rain which fell in a 2-hour period.  This equates to a roughly 100-year rainfall event per NOAA Atlas 14 rainfall frequency estimates.

Heavy Rain in ASHE, NORTH CAROLINA
From 07-AUG-20 13:00:00 to 07-AUG-20 16:00:00 (EST-5)
Location: BEAVER CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS station recorded 2.48 inches of rain from a slow-moving thunderstorm, most of which fell between 2 pm and 5 pm on August 7th.

Heavy Rain in YADKIN, NORTH CAROLINA
From 05-AUG-20 19:45:00 to 06-AUG-20 23:15:00 (EST-5)
Location: BRANON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A home mesonet station recorded a storm total 4.67 inches of rain.  Most of this fell in a 2-3 hour period, which equated to roughly a 150-year rainfall event during the 2 and 3 hour time periods per NOAA Atlas-14 point analysis.

Heavy Rain in YADKIN, NORTH CAROLINA
From 05-AUG-20 19:45:00 to 05-AUG-20 23:15:00 (EST-5)
Location: YADKINVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer recorded a storm-total rainfall amount of 4.12 inches, much of which fell during at 2 to 3 hour time period.  This equated to an estimated 150-year event for this location per NOAA Atlas-14 point analysis.

Heavy Rain in YADKIN, NORTH CAROLINA
From 05-AUG-20 20:04:00 to 05-AUG-20 23:19:00 (EST-5)
Location: LONE HICKORY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A home mesonet station recorded a storm total 3.96 inches of rain. Most of this fell in a little over 2 hours, which equated to a little over a 100-year rainfall event per NOAA Atlas-14 point analysis.

Heavy Rain in SURRY, NORTH CAROLINA
From 05-AUG-20 20:00:00 to 05-AUG-20 22:00:00 (EST-5)
Location: COPELAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CoCoRaHS observer recorded at storm total amount of 3.78 inches of rainfall.  The observer noted that 2.1 inches fell in about 45 minutes, estimated to be around a 50-year rainfall events for this duration.

Heavy Rain in WILKES, NORTH CAROLINA
From 06-AUG-20 15:00:00 to 06-AUG-20 17:00:00 (EST-5)
Location: NORTH WILKESBORO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The Cooperative Weather Observer in North Wilkesboro, NC recorded 1.94 inches of rain from thunderstorms over the area.  Much of this rain fell between over a 2-hour period during the afternoon.

Flash Flood in WILKES, NORTH CAROLINA
From 06-AUG-20 17:15:00 to 06-AUG-20 18:15:00 (EST-5)
Location: NORTH WILKESBORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain from thunderstorms caused an un-named creek to overflow its banks and cause flooding across Elkin Highway in North Wilkesboro.

Flash Flood in YADKIN, NORTH CAROLINA
From 05-AUG-20 21:00:00 to 06-AUG-20 00:30:00 (EST-5)
Location: CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorms produced 3 to 4 inch rainfall amounts, with locally higher amounts in spots, across the town of Yadkinville and central portions of Yadkin County.  Most of this rain fell within a 3-hour timeframe.  Runoff from this rain caused numerous roads in the area to be flooded and impassible until the flood waters receded.  Among the roads that were flooded were Billy Reynolds Road and Booger Swamp Road in Yadkinville.

Flash Flood in SURRY, NORTH CAROLINA
From 05-AUG-20 21:30:00 to 05-AUG-20 23:00:00 (EST-5)
Location: FAIRVIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Runoff due to heavy rain from nearby thunderstorms caused Cody Creek to rise 3 to 4 feet outside of its banks near Highway 601.

Flash Flood in ASHE, NORTH CAROLINA
From 06-AUG-20 14:45:00 to 06-AUG-20 16:45:00 (EST-5)
Location: NATHANS CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain from thunderstorms caused Foster Springs Branch to overflow its banks, closing Old Highway 16 due to flooding.  Radar-based rainfall estimates indicated the possibility of 3 to 4 inches having fallen in the nearby area, while a mesonet station 1.3 miles to the north-northeast recorded roughly 1.6 inches having fallen in a 45 minute period.

Flash Flood in WILKES, NORTH CAROLINA
From 06-AUG-20 17:30:00 to 06-AUG-20 19:30:00 (EST-5)
Location: BUCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain from thunderstorms caused flooding at the intersection of Congo Road and Buck Road.  The flooding was reported to be several inches deep. A large area of cleared land along Buck Road, uphill from the intersection, may have enhanced the runoff.

Flash Flood in ASHE, NORTH CAROLINA
From 07-AUG-20 13:48:00 to 07-AUG-20 14:48:00 (EST-5)
Location: BEAVER CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain falling from a slow-moving thunderstorm caused Beaver Creek to rise out of its banks, flooding onto adjacent Beaver Creek School Road.

Flash Flood in ASHE, NORTH CAROLINA
From 07-AUG-20 14:19:00 to 07-AUG-20 17:00:00 (EST-5)
Location: FLEETWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A slow-moving thunderstorm produced 4 to 5 inch rainfall amounts over a 2-hour period in the Fleetwood area.  CREST unit streamflow estimates put this event close to 1000 cfs/mi^2, or a 100-200 year rainfall event at both the 1- and 2-hour time intervals.  This resulted in several reports of flooding in the Fleetwood area, including at the intersection of Windy Hill Road and Highway 221, which made the intersection impassible.  The heavy rain caused a mudslide to occur along Paul Goodman Road.  Rock Quarry road was impassible where a tributary of the South Fork New River, the drainage area of which was completely within the area of heaviest rainfall, flooded out of its banks and over-topped the intersecting bridge.  The same tributary caused flooding along Dick Phillips Road further upstream where the two run adjacent to one another.

Flash Flood in ASHE, NORTH CAROLINA
From 07-AUG-20 15:44:00 to 07-AUG-20 17:44:00 (EST-5)
Location: FLEETWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Runoff due to heavy rain from thunderstorms caused Railroad Grade Road to be flooded and impassible.  The road reopened during the evening after flood waters had receded.