Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Wilmington, NC

September 21, 2021New Hanover County, North Carolina

NWS Wilmington, NC issued this flash flood warning at Sep 21, 2021, 5:00 PM EDT for New Hanover County, North Carolina. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 21, 2021, 5:00 PM EDT (21:00 UTC)
Expired: Sep 21, 2021, 5:21 PM EDT
In force: 21 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Flood severity: None

County New Hanover County, NC

The radar

The Wilmington radar (KLTX), 51 km from the middle of the area, began a volume at 21:04 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.

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 9.0 hours before the alert went out and 117 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: 583 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

935 
WGUS52 KILM 212100
FFWILM
NCC129-220000-
/O.NEW.KILM.FF.W.0005.210921T2100Z-210922T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington NC
500 PM EDT Tue Sep 21 2021

The National Weather Service in Wilmington has issued a

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

* Until 800 PM EDT.

* At 500 PM EDT, emergency management reported that Daws Creek Road 
  just to the west of Highway 133 in eastern Brunswick County, NC is 
  closed. Meanwhile, radar indicates possible flooding along and 
  north of downtown Wilmington, NC, south of Wilmington 
  International Airport. Between 2 and 4.5 inches of rain have 
  fallen. Additional rainfall amounts of 1 to 2 inches are possible 
  in the warned area. Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  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...
  Wilmington, University Of North Carolina At Wilmington, 
  Hightsville, Masonboro, Silver Lake, Kings Grant and New Hanover 
  Regional Medical Center.

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 3423 7796 3426 7794 3425 7785 3416 7790
      3414 7795 3415 7795 3417 7796 3419 7796
      3420 7795 3420 7796 3423 7795

FLASH FLOOD...OBSERVED

$$

IGB

1 follow-up statement

272 
WGUS72 KILM 212121
FFSILM

Flash Flood Statement
National Weather Service Wilmington NC
521 PM EDT Tue Sep 21 2021

NCC129-212131-
/O.CAN.KILM.FF.W.0005.000000T0000Z-210922T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Hanover NC-
521 PM EDT Tue Sep 21 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL NEW HANOVER COUNTY...

This Flash Flood Warning has been cancelled, and has been replaced 
by a bigger warning that better covers the threat.

A Flash Flood Watch remains in effect until 900 AM EDT Wednesday for 
portions of southeast North Carolina and northeast South Carolina.

LAT...LON 3423 7796 3426 7794 3425 7785 3416 7790
      3414 7795 3415 7795 3417 7796 3419 7796
      3420 7795 3420 7796 3423 7795

$$

IGB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 8:08 PM EDT	Rip Current Statement	ILM	New Hanover, Pender	24 hr
Sep 21, 3:12 AM EDT	Flash Flood Watch	ILM	Bladen, Brunswick, Columbus, New Hanover, Pender	39 hr
Sep 21, 8:23 AM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover, Pender	112 min
Sep 21, 9:13 AM EDT	Coastal Flood Advisory	ILM	New Hanover	4 hr
Sep 21, 10:11 AM EDT	Small Craft Advisory	ILM		14 hr
Sep 21, 11:13 AM EDT	Areal Flood Advisory	ILM	Bladen, Brunswick, Columbus	3 hr
Sep 21, 12:34 PM EDT	Special Weather Statement	ILM	Brunswick	41 min
Sep 21, 1:34 PM EDT	Areal Flood Advisory	ILM	Bladen, Brunswick, Columbus, New Hanover, Pender	3 hr
Sep 21, 5:20 PM EDT	Flash Flood Warning	ILM	Brunswick, New Hanover, Pender	3 hr
Sep 21, 5:47 PM EDT	Areal Flood Advisory	ILM	Pender	3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.