Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 12, NWS Wilmington, NC

May 3, 2021Horry County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at May 3, 2021, 6:43 PM EDT for Horry County, South Carolina. It was in force for 32 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: May 3, 2021, 6:43 PM EDT (22:43 UTC)
Expired: May 3, 2021, 7:15 PM EDT
In force: 32 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Horry County, SC

The radar

The Wilmington radar (KLTX), 42 km from the middle of the area, began a volume at 22:44 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
May 3, 7:00 PM EDT	HAIL 1	Myrtle Beach, SC	MULTIPLE REPORTS OF QUARTER SIZED HAIL IN MYRTLE BEACH - PELICANS BALLPARK, 48TH AVE, MYRTLEWOOD

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, 10.7 hours before the alert went out and 149 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: 1333 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

As transmitted.

200 
WUUS52 KILM 032243
SVRILM
SCC051-032315-
/O.NEW.KILM.SV.W.0012.210503T2243Z-210503T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
643 PM EDT Mon May 3 2021

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Central Horry County in northeastern South Carolina...

* Until 715 PM EDT.

* At 643 PM EDT, a severe thunderstorm was located over Hickory
  Grove, or near Conway, moving east at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Myrtle Beach, Conway, North Myrtle Beach, Socastee, Red Hill,
  Little River, North Myrtle Beach Airport, Little River Entrance,
  Myrtle Beach Airport, Hickory Grove, Homewood, Horry Georgetown
  Technical College Conway Campus, Nixonville, Barefoot Landing Area
  Of North Myrtle Beach, Wampee, Hand, Forestbrook, Longs, Hammond
  and Coastal Carolina University.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3390 7912 3403 7875 3385 7854 3384 7862
      3380 7872 3375 7881 3369 7888 3367 7904
TIME...MOT...LOC 2243Z 254DEG 32KT 3386 7900 

HAIL...1.00IN
WIND...60MPH
 
$$

VAO

2 follow-up statements

236 
WWUS52 KILM 032258
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
658 PM EDT Mon May 3 2021

SCC051-032315-
/O.CON.KILM.SV.W.0012.000000T0000Z-210503T2315Z/
Horry SC-
658 PM EDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CENTRAL HORRY COUNTY...

At 658 PM EDT, a severe thunderstorm was located over Hammond, or 9
miles northwest of North Myrtle Beach Airport, moving east at 35 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and power lines.

Locations impacted include...
Myrtle Beach, North Myrtle Beach, North Myrtle Beach Airport, Little
River, Little River Entrance, Myrtle Beach Airport, Socastee, Hickory
Grove, Hand, Nixonville, Barefoot Landing Area Of North Myrtle Beach,
Wampee, Forestbrook, Longs, Hammond, Brooksville, Briarcliffe Acres,
Atlantic Beach, Sea Coast Medical Center and Grand Strand Regional
Medical Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3393 7903 3403 7875 3385 7854 3384 7862
      3380 7872 3375 7881 3369 7888 3368 7897
TIME...MOT...LOC 2258Z 254DEG 32KT 3390 7884 

HAIL...1.00IN
WIND...60MPH
 
$$

VAO

119 
WWUS52 KILM 032309 RRA
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
709 PM EDT Mon May 3 2021

SCC051-032319-
/O.EXP.KILM.SV.W.0012.000000T0000Z-210503T2315Z/
Horry SC-
709 PM EDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HORRY COUNTY WILL
EXPIRE AT 715 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and small hail are still possible with this thunderstorm.

LAT...LON 3393 7903 3403 7875 3385 7854 3384 7862
      3380 7872 3375 7881 3369 7888 3368 7897
TIME...MOT...LOC 2309Z 254DEG 32KT 3392 7874 

$$

VAO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 4:45 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Florence	60 min
May 3, 5:23 PM EDT	Special Weather Statement	ILM	Dillon	37 min
May 3, 5:25 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Williamsburg	21 min
May 3, 5:42 PM EDT	Special Weather Statement	ILM	Marion	63 min
May 3, 5:44 PM EDT	Special Weather Statement	ILM	Williamsburg	31 min
May 3, 5:50 PM EDT	Severe Thunderstorm Warning	ILM	Horry, Marion	40 min
May 3, 6:13 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown, Horry, Marion, Williamsburg	32 min
May 3, 6:26 PM EDT	Severe Thunderstorm Warning	ILM	Horry	49 min
May 3, 6:55 PM EDT	Special Weather Statement	ILM	Georgetown	65 min
May 3, 7:28 PM EDT	Special Weather Statement	ILM	Georgetown	32 min
May 3, 7:59 PM EDT	Beach Hazards Statement	ILM	Georgetown, Horry	24 hr

Nearby

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.