Alert archive / North Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 87, NWS Wilmington, NC

October 23, 2017Brunswick County, Columbus County, North Carolina; Horry County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Oct 23, 2017, 9:57 PM EDT for Brunswick County, Columbus County, North Carolina; Horry County, South Carolina. It was in force for 38 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: Oct 23, 2017, 9:57 PM EDT (01:57 UTC)
Expired: Oct 23, 2017, 10:35 PM EDT
In force: 38 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Brunswick County, NC, Columbus County, NC, Horry County, SC

The radar

The Wilmington radar (KLTX), 18 km from the middle of the area, began a volume at 01:58 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
Oct 23, 10:06 PM EDT	TSTM WND DMG	1 Nw Olyphic, NC	2 TREES BLOWN DOWN JUST NORTH OF OLD DOTHAN ROAD

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 00:00Z, 2.0 hours before the alert went out and 179 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: 531 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 678 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

946 
WUUS52 KILM 240157
SVRILM
NCC019-047-SCC051-240245-
/O.NEW.KILM.SV.W.0087.171024T0157Z-171024T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
957 PM EDT MON OCT 23 2017

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  West central Brunswick County in southeastern North Carolina...
  South central Columbus County in southeastern North Carolina...
  East central Horry County in northeastern South Carolina...

* Until 1045 PM EDT

* At 956 PM EDT, a severe thunderstorm was located over Brooksville,
  or near Little River, moving north northeast at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage trees and power lines. 

* Locations impacted include...
  Iredell, Bethel, Freeland, Longs, Pireway, Ash, Nakina, Dulah, Old
  Dock, Bughill, Brooksville and Crusoe Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3416 7845 3391 7860 3389 7865 3390 7880
      3421 7872
TIME...MOT...LOC 0156Z 190DEG 25KT 3392 7869 

HAIL...<.75IN
WIND...60MPH
 
$$

DCH

2 follow-up statements

552 
WWUS52 KILM 240210
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
1010 PM EDT MON OCT 23 2017

NCC019-SCC051-240220-
/O.CAN.KILM.SV.W.0087.000000T0000Z-171024T0245Z/
Brunswick NC-Horry SC-
1010 PM EDT MON OCT 23 2017

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL BRUNSWICK AND
EAST CENTRAL HORRY COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3417 7849 3417 7852 3415 7854 3412 7854
      3413 7855 3410 7855 3409 7856 3402 7861
      3401 7864 3399 7863 3396 7866 3403 7875
      3421 7872
TIME...MOT...LOC 0210Z 190DEG 25KT 3402 7867 

$$

NCC047-240245-
/O.CON.KILM.SV.W.0087.000000T0000Z-171024T0245Z/
Columbus NC-
1010 PM EDT MON OCT 23 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR SOUTH CENTRAL COLUMBUS COUNTY...

At 1010 PM EDT, a severe thunderstorm was located over Pireway, or 10
miles north of Little River, moving north at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage trees and power lines. 

Locations impacted include...
Bethel, Pireway, Nakina, Dulah, Old Dock, Bughill and Crusoe Island. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3417 7849 3417 7852 3415 7854 3412 7854
      3413 7855 3410 7855 3409 7856 3402 7861
      3401 7864 3399 7863 3396 7866 3403 7875
      3421 7872
TIME...MOT...LOC 0210Z 190DEG 25KT 3402 7867 

HAIL...<.75IN
WIND...60MPH
 
$$

RGZ

893 
WWUS52 KILM 240235
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
1035 PM EDT MON OCT 23 2017

NCC047-240244-
/O.CAN.KILM.SV.W.0087.000000T0000Z-171024T0245Z/
Columbus NC-
1035 PM EDT MON OCT 23 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL COLUMBUS COUNTY
IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

LAT...LON 3417 7849 3417 7852 3415 7854 3412 7854
      3413 7855 3410 7855 3409 7856 3402 7861
      3401 7864 3399 7863 3396 7866 3403 7875
      3421 7872
TIME...MOT...LOC 0233Z 190DEG 25KT 3419 7863 

$$

RGZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 10:08 PM EDT	Special Weather Statement	ILM	Columbus	67 min
Oct 23, 10:18 PM EDT	Special Weather Statement	ILM	Pender	57 min
Oct 23, 10:27 PM EDT	Special Weather Statement	ILM	Robeson	63 min
Oct 23, 11:45 PM EDT	Special Weather Statement	ILM	Brunswick, New Hanover, Pender	60 min
Oct 23, 11:46 PM EDT	Tornado Warning	ILM	Brunswick, Pender	33 min
Oct 24, 12:50 AM EDT	Special Weather Statement	ILM	New Hanover, Pender	40 min
Oct 23, 8:11 PM EDT	Special Weather Statement	ILM	Florence, Williamsburg	49 min
Oct 23, 9:05 PM EDT	Special Weather Statement	ILM	Florence	40 min
Oct 23, 9:26 PM EDT	Severe Thunderstorm Warning	ILM	Horry	49 min
Oct 23, 10:06 PM EDT	Special Weather Statement	ILM	Horry	24 min
Oct 23, 10:20 PM EDT	Tornado Warning	ILM	Horry	25 min
Oct 24, 12:35 AM EDT	Special Marine Warning	ILM		55 min
Oct 24, 12:46 AM EDT	Special Marine Warning	ILM		59 min
Oct 24, 1:46 AM EDT	Special Marine Warning	ILM		89 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2017 Severe Thunderstorm Warnings in South Carolina, 2017 Every severe thunderstorm warning in 2017

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.