Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Wilmington, NC

July 18, 20214 counties in South Carolina; Columbus County, Robeson County, North Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Jul 18, 2021, 4:56 PM EDT for 4 counties in South Carolina; Columbus County, Robeson County, North Carolina. It was in force for 34 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 18, 2021, 4:56 PM EDT (20:56 UTC)
Expired: Jul 18, 2021, 5:30 PM EDT
In force: 34 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbus County, NC, Robeson County, NC, Dillon County, SC, Florence County, SC, Horry County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 83 km from the middle of the area, began a volume at 20:58 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
Jul 18, 5:00 PM EDT	TSTM WND DMG	7 Sw Sellers, SC	TREE IN ROADWAY INTERSTECTION OF US 76 AND HASSIE RD.

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

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.9 hours before the alert went out and 171 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: 962 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

603 
WUUS52 KILM 182056
SVRILM
NCC047-155-SCC033-041-051-067-182130-
/O.NEW.KILM.SV.W.0035.210718T2056Z-210718T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
456 PM EDT Sun Jul 18 2021

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  South central Robeson County in southeastern North Carolina...
  Northwestern Columbus County in southeastern North Carolina...
  Northeastern Florence County in northeastern South Carolina...
  Dillon County in northeastern South Carolina...
  Northwestern Horry County in northeastern South Carolina...
  Northern Marion County in northeastern South Carolina...

* Until 530 PM EDT.

* At 456 PM EDT, severe thunderstorms were located along a line
  extending from near Francis Marion University to near Gapway,
  moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Marion, Dillon, Mullins, Latta, Fair Bluff, Lake View, Sellers,
  Fork, Blue Brick, Zion, Hamer, Mars Bluff, Gapway, Rains, Oak
  Grove, Francis Marion University, Barnesville, Bingham, Floydale
  and Smithboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3441 7892 3405 7917 3415 7973 3452 7949
TIME...MOT...LOC 2056Z 209DEG 35KT 3419 7961 3412 7922 

HAIL...0.75IN
WIND...60MPH
 
$$

TRA

3 follow-up statements

395 
WWUS52 KILM 182108
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
508 PM EDT Sun Jul 18 2021

SCC041-182117-
/O.CAN.KILM.SV.W.0035.000000T0000Z-210718T2130Z/
Florence SC-
508 PM EDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL FLORENCE COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of Florence 
County. Therefore, the warning has been cancelled.

LAT...LON 3441 7892 3405 7917 3411 7952 3413 7952
      3413 7953 3414 7954 3415 7954 3418 7957
      3419 7957 3420 7955 3421 7954 3426 7956
      3429 7960 3430 7963 3452 7949
TIME...MOT...LOC 2107Z 209DEG 35KT 3429 7955 3422 7916 

$$

NCC047-155-SCC033-051-067-182130-
/O.CON.KILM.SV.W.0035.000000T0000Z-210718T2130Z/
Robeson NC-Columbus NC-Dillon SC-Horry SC-Marion SC-
508 PM EDT Sun Jul 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT 
FOR SOUTH CENTRAL ROBESON...WESTERN COLUMBUS...DILLON... 
NORTHWESTERN HORRY AND NORTHERN MARION COUNTIES...

At 507 PM EDT, severe thunderstorms were located along a line
extending from near Sellers to near Mullins, moving northeast at 40
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Marion, Dillon, Mullins, Latta, Fair Bluff, Lake View, Sellers, Fork,
Blue Brick, Zion, Hamer, Gapway, Rains, Oak Grove, Barnesville,
Bingham, Floydale, Smithboro, Kemper and Little Rock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3441 7892 3405 7917 3411 7952 3413 7952
      3413 7953 3414 7954 3415 7954 3418 7957
      3419 7957 3420 7955 3421 7954 3426 7956
      3429 7960 3430 7963 3452 7949
TIME...MOT...LOC 2107Z 209DEG 35KT 3429 7955 3422 7916 

HAIL...0.75IN
WIND...60MPH
 
$$

TRA

567 
WWUS52 KILM 182122
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
522 PM EDT Sun Jul 18 2021

SCC051-067-182132-
/O.CAN.KILM.SV.W.0035.000000T0000Z-210718T2130Z/
Horry SC-Marion SC-
522 PM EDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HORRY AND
NORTHERN MARION COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3429 7900 3437 7959 3452 7949 3441 7892
TIME...MOT...LOC 2122Z 210DEG 40KT 3443 7946 3444 7896 

$$

NCC047-155-SCC033-182130-
/O.CON.KILM.SV.W.0035.000000T0000Z-210718T2130Z/
Robeson NC-Columbus NC-Dillon SC-
522 PM EDT Sun Jul 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHERN ROBESON...NORTHWESTERN COLUMBUS AND CENTRAL DILLON
COUNTIES...

At 522 PM EDT, severe thunderstorms were located along a line
extending from near Little Rock to Boardman, moving northeast at 45
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Dillon, Fair Bluff, Lake View, Bingham, Hamer, Kemper, Little Rock,
Barnesville, Minturn, Marietta and Mcleod Medical Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3429 7900 3437 7959 3452 7949 3441 7892
TIME...MOT...LOC 2122Z 210DEG 40KT 3443 7946 3444 7896 

HAIL...0.75IN
WIND...60MPH
 
$$

TRA

226 
WWUS52 KILM 182129
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
529 PM EDT Sun Jul 18 2021

NCC047-155-SCC033-182139-
/O.EXP.KILM.SV.W.0035.000000T0000Z-210718T2130Z/
Robeson NC-Columbus NC-Dillon SC-
529 PM EDT Sun Jul 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ROBESON...
NORTHWESTERN COLUMBUS AND CENTRAL DILLON COUNTIES WILL EXPIRE AT 530
PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

Please contact the National Weather Service if you observed downed 
trees or hail.

LAT...LON 3429 7900 3437 7959 3452 7949 3441 7892
TIME...MOT...LOC 2129Z 209DEG 35KT 3446 7943 3447 7893 

$$

TRA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 3:05 PM EDT	Special Weather Statement	ILM	Horry	55 min
Jul 18, 3:24 PM EDT	Special Weather Statement	ILM	Williamsburg	66 min
Jul 18, 3:28 PM EDT	Special Weather Statement	ILM	Horry	17 min
Jul 18, 3:58 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Williamsburg	32 min
Jul 18, 4:30 PM EDT	Special Weather Statement	ILM	Florence, Marion	30 min
Jul 18, 4:47 PM EDT	Special Weather Statement	ILM	Darlington, Dillon, Marlboro	28 min
Jul 18, 5:14 PM EDT	Special Weather Statement	ILM	Darlington	31 min
Jul 18, 2:20 PM EDT	Special Weather Statement	ILM	Brunswick	25 min
Jul 18, 2:41 PM EDT	Special Weather Statement	ILM	Pender	34 min
Jul 18, 3:10 PM EDT	Special Weather Statement	ILM	Onslow	35 min
Jul 18, 3:19 PM EDT	Areal Flood Advisory	ILM	New Hanover, Pender	63 min
Jul 18, 3:51 PM EDT	Special Weather Statement	ILM	Columbus	24 min
Jul 18, 5:21 PM EDT	Special Weather Statement	ILM	Robeson	24 min
Jul 18, 5:33 PM EDT	Special Weather Statement	ILM	Robeson	57 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2021 Severe Thunderstorm Warnings in North 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.