Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 1, NWS Wilmington, NC

July 19, 2021Columbus County, North Carolina

NWS Wilmington, NC issued this flash flood warning at Jul 19, 2021, 6:32 PM EDT for Columbus County, North Carolina. It was in force for 58 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 19, 2021, 6:32 PM EDT (22:32 UTC)
Expired: Jul 19, 2021, 7:30 PM EDT
In force: 58 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Flood severity: None

County Columbus County, NC

The radar

The Wilmington radar (KLTX), 31 km from the middle of the area, began a volume at 22:33 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 19, 7:11 PM EDT	FLASH FLOOD	5 Ne Nakina, NC	FLOOD WATER IS COVERING YARDS AND FLOWING BENEATH MOBILE HOMES IN THE OLD DOCK COMMUNITY.

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

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 10.5 hours before the alert went out and 174 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: 207 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 741 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

339 
WGUS52 KILM 192232
FFWILM
NCC047-192330-
/O.NEW.KILM.FF.W.0001.210719T2232Z-210719T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington NC
632 PM EDT Mon Jul 19 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Central Columbus County in southeastern North Carolina...

* Until 730 PM EDT.

* At 632 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Old Dock, Crusoe Island and Williams.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause dangerous flooding, 
especially near creeks and streams, drainage ditches, and low-lying 
flood prone areas. Turn around, don't drown if you encounter a 
flooded road. Most flood deaths occur in vehicles. Stay away from 
storm drains, culverts, creeks, and streams. Water levels can rise 
rapidly and sweep you away.

&&

LAT...LON 3421 7877 3425 7853 3419 7846 3415 7867

FLASH FLOOD...RADAR INDICATED

$$

RGZ

1 follow-up statement

037 
WGUS72 KILM 192332
FFSILM

Flash Flood Statement
National Weather Service Wilmington NC
732 PM EDT Mon Jul 19 2021

NCC047-192342-
/O.EXP.KILM.FF.W.0001.000000T0000Z-210719T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Columbus NC-
732 PM EDT Mon Jul 19 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL COLUMBUS COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures or any 
lingering water on the roadways.

Do not attempt to drive through flooded roadways at night. 

A Flash Flood Watch remains in effect until 600 AM EDT Tuesday for 
portions of southeast North Carolina and northeast South Carolina.

LAT...LON 3421 7877 3425 7853 3419 7846 3415 7867

$$

RGZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 9:20 AM EDT	Special Marine Warning	ILM		40 min
Jul 19, 10:18 AM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover	103 min
Jul 19, 11:55 AM EDT	Flash Flood Watch	ILM	Brunswick, Columbus, New Hanover, Pender	10 hr
Jul 19, 4:16 PM EDT	Areal Flood Advisory	ILM	Bladen, Columbus	3 hr
Jul 19, 5:43 PM EDT	Areal Flood Advisory	ILM	Robeson	62 min
Jul 19, 6:01 PM EDT	Areal Flood Advisory	ILM	Pender	96 min
Jul 19, 7:40 PM EDT	Areal Flood Advisory	ILM	Brunswick, Columbus, New Hanover, Pender	115 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.