Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Raleigh, NC

July 14, 2021Randolph County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 14, 2021, 6:50 PM EDT for Randolph County, North Carolina. It was in force for 115 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 14, 2021, 6:50 PM EDT (22:50 UTC)
Expired: Jul 14, 2021, 8:45 PM EDT
In force: 115 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 130 km from the middle of the area, began a volume at 22:54 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 14, 6:50 PM EDT	FLASH FLOOD	3 Se Archdale, NC	IMPASSABLE FLOOD WATERS INUNDATING THE AREA NEAR THE INTERSECTION OF OLD GLENOLA RD AND TABACCO RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.8 hours before the alert went out and 28 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 95 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1024 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

468 
WGUS52 KRAH 142250
FFWRAH
NCC151-150045-
/O.NEW.KRAH.FF.W.0010.210714T2250Z-210715T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Raleigh NC
650 PM EDT Wed Jul 14 2021

The National Weather Service in Raleigh has issued a

* Flash Flood Warning for...
  Northwestern Randolph County in central North Carolina...

* Until 845 PM EDT.

* At 650 PM EDT, emergency management reported thunderstorms 
  producing heavy rain and flooded roadways across the warned area. 
  Between 2.5 and 3.5 inches of rain have fallen. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Thunderstorms producing flash flooding.

  SOURCE...Emergency management reported.

  IMPACT...Flash flooding of creeks and streams, urban areas,
           highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  High Point, Asheboro, Randleman, Archdale, Trinity and Randleman 
  Regional Reservior Marina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be aware of your surroundings and do not drive on flooded roads.  
Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.



&&

LAT...LON 3592 8004 3590 7970 3571 7973 3570 8005

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 14, 2:49 PM EDT	Special Weather Statement	RAH	Person	56 min
Jul 14, 2:57 PM EDT	Special Weather Statement	RAH	Caswell	63 min
Jul 14, 3:51 PM EDT	Areal Flood Advisory	RAH	Alamance, Guilford, Orange	3 hr
Jul 14, 4:41 PM EDT	Special Weather Statement	RAH	Alamance, Guilford	64 min
Jul 14, 4:46 PM EDT	Special Weather Statement	RAH	Forsyth	59 min
Jul 14, 5:11 PM EDT	Areal Flood Advisory	RAH	Davidson, Guilford, Randolph	64 min
Jul 14, 5:29 PM EDT	Special Weather Statement	RAH	Davidson, Randolph	61 min
Jul 14, 5:49 PM EDT	Areal Flood Advisory	RAH	Davidson, Guilford, Randolph	116 min
Jul 14, 6:21 PM EDT	Special Weather Statement	RAH	Randolph	54 min
Jul 14, 7:23 PM EDT	Special Weather Statement	RAH	Wake	52 min
Jul 14, 7:32 PM EDT	Special Weather Statement	RAH	Montgomery, Moore, Stanly	58 min

Nearby

Flash Flood Warnings in North Carolina, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.