Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 13, NWS Wilmington, NC

May 3, 2021Georgetown County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at May 3, 2021, 8:47 PM EDT for Georgetown County, South Carolina. It was in force for 43 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: May 3, 2021, 8:47 PM EDT (00:47 UTC)
Expired: May 3, 2021, 9:30 PM EDT
In force: 43 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Georgetown County, SC

The radar

The Wilmington radar (KLTX), 125 km from the middle of the area, began a volume at 00:46 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

Charleston AFB, SC (KCHS), launched 00:00Z, 0.8 hours before the alert went out and 66 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: 384 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

208 
WUUS52 KILM 040047
SVRILM
SCC043-040130-
/O.NEW.KILM.SV.W.0013.210504T0047Z-210504T0130Z/

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

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Southern Georgetown County in northeastern South Carolina...

* Until 930 PM EDT.

* At 846 PM EDT, a severe thunderstorm was located about 5 miles 
  southwest of North Santee, 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...
  Yawkey South Island, Winyah Bay Entrance and North Santee. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3314 7928 3315 7935 3318 7940 3321 7943
      3322 7945 3324 7946 3323 7947 3324 7947
      3324 7948 3325 7948 3324 7949 3325 7953
      3326 7955 3326 7956 3327 7956 3326 7918
      3320 7917 3316 7920 3312 7925 3312 7927
TIME...MOT...LOC 0046Z 271DEG 34KT 3320 7942 

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

SRP

1 follow-up statement

836 
WWUS52 KILM 040127
SVSILM

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

SCC043-040136-
/O.EXP.KILM.SV.W.0013.000000T0000Z-210504T0130Z/
Georgetown SC-
927 PM EDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GEORGETOWN COUNTY
WILL EXPIRE AT 930 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 3314 7928 3315 7935 3318 7940 3321 7943
      3322 7945 3324 7946 3323 7947 3324 7947
      3324 7948 3325 7948 3324 7949 3325 7953
      3326 7955 3326 7956 3327 7956 3326 7918
      3320 7917 3316 7920 3312 7925 3312 7927
TIME...MOT...LOC 0126Z 271DEG 34KT 3319 7899 

$$

SRP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 4:50 PM EDT	Special Weather Statement	ILM	Georgetown	40 min
May 4, 5:08 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Marlboro	52 min
May 4, 5:57 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Dillon, Marlboro	33 min
May 4, 6:26 PM EDT	Special Weather Statement	ILM	Dillon, Florence	49 min
May 4, 6:30 PM EDT	Severe Thunderstorm Warning	ILM	Dillon	30 min
May 4, 7:04 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Williamsburg	41 min
May 4, 7:42 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Georgetown, Marion, Williamsburg	33 min

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