Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 42, NWS Wilmington, NC

August 1, 2021Columbus County, North Carolina; Horry County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Aug 1, 2021, 4:59 PM EDT for Columbus County, North Carolina; Horry County, South Carolina. It was in force for 46 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: Aug 1, 2021, 4:59 PM EDT (20:59 UTC)
Expired: Aug 1, 2021, 5:45 PM EDT
In force: 46 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbus County, NC, Horry County, SC

The radar

The Wilmington radar (KLTX), 43 km from the middle of the area, began a volume at 21:02 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
Aug 1, 5:15 PM EDT	TSTM WND DMG	2 Ssw Green Sea, SC	TREES DOWN IN NORTHERN HORRY COUNTY

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 1, 12:37 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.0 hours before the alert went out and 176 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: 747 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

503 
WUUS52 KILM 012059
SVRILM
NCC047-SCC051-012145-
/O.NEW.KILM.SV.W.0042.210801T2059Z-210801T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
459 PM EDT Sun Aug 1 2021

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Columbus County in southeastern North Carolina...
  Northern Horry County in northeastern South Carolina...

* Until 545 PM EDT.

* At 459 PM EDT, severe thunderstorms were located along a line
  extending from Evergreen to near Gapway, moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect wind damage to trees and power lines.

* Locations impacted include...
  Whiteville, Tabor City, Loris, Chadbourn, Bethel, Lake Waccamaw,
  Fair Bluff, Nakina, Redbug, Bughill, Southeastern Community
  College, Williams, Goretown, Galivants Ferry, Cherry Grove, Old
  Dock, Mollie, Sidney, Clarendon and Pireway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3426 7832 3414 7842 3417 7850 3415 7854
      3406 7856 3403 7859 3401 7864 3397 7862
      3395 7868 3405 7925 3407 7924 3409 7925
      3411 7922 3418 7919 3422 7914 3426 7913
      3429 7909 3431 7904 3434 7903 3440 7897
TIME...MOT...LOC 2059Z 281DEG 47KT 3443 7889 3412 7916 

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

MBB

1 follow-up statement

765 
WWUS52 KILM 012141
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
541 PM EDT Sun Aug 1 2021

NCC047-SCC051-012151-
/O.EXP.KILM.SV.W.0042.000000T0000Z-210801T2145Z/
Columbus NC-Horry SC-
541 PM EDT Sun Aug 1 2021

...THE SEVERE THUNDERSTORM WARNING FOR COLUMBUS AND NORTHERN HORRY
COUNTIES WILL EXPIRE AT 545 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southeastern North Carolina...and northeastern South Carolina.

LAT...LON 3426 7832 3414 7842 3417 7850 3415 7854
      3406 7856 3403 7859 3401 7864 3397 7862
      3395 7868 3405 7925 3407 7924 3409 7925
      3411 7922 3418 7919 3422 7914 3426 7913
      3429 7909 3431 7904 3434 7903 3440 7897
TIME...MOT...LOC 2141Z 281DEG 47KT 3433 7827 3402 7854 

$$

MBB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:26 PM EDT	Beach Hazards Statement	ILM	New Hanover, Pender	24 hr
Jul 31, 10:28 PM EDT	Special Weather Statement	ILM	Brunswick	62 min
Aug 1, 3:47 AM EDT	Heat Advisory	ILM	Bladen, Brunswick, Columbus, New Hanover, Pender	15 hr
Aug 1, 7:27 AM EDT	Special Marine Warning	ILM		48 min
Aug 1, 3:29 PM EDT	Special Weather Statement	ILM	Robeson	61 min
Aug 1, 3:46 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	17 min
Aug 1, 4:05 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	25 min
Aug 1, 4:29 PM EDT	Severe Thunderstorm Warning	ILM	Robeson	46 min
Aug 1, 4:51 PM EDT	Severe Thunderstorm Warning	ILM	Bladen, Columbus, Pender	30 min
Aug 1, 5:23 PM EDT	Special Weather Statement	ILM	Bladen	52 min
Aug 1, 5:44 PM EDT	Special Weather Statement	ILM	Brunswick	31 min
Aug 1, 5:46 PM EDT	Special Marine Warning	ILM		59 min
Aug 1, 6:00 PM EDT	Special Marine Warning	ILM		60 min
Aug 1, 6:01 PM EDT	Special Weather Statement	ILM	New Hanover	44 min
Aug 1, 6:54 PM EDT	Special Marine Warning	ILM		66 min
Aug 1, 3:33 PM EDT	Special Weather Statement	ILM	Marlboro	42 min
Aug 1, 3:56 PM EDT	Special Weather Statement	ILM	Darlington, Dillon, Marlboro	64 min
Aug 1, 5:50 PM EDT	Special Weather Statement	ILM	Horry	25 min
Aug 1, 7:43 PM EDT	Special Weather Statement	ILM	Florence, Marion	62 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2021 Severe Thunderstorm Warnings in South Carolina, 2021 Every severe thunderstorm 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.