Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Columbia, SC

May 3, 2021Kershaw County, Lee County, Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 3, 2021, 4:19 PM EDT for Kershaw County, Lee County, Sumter County, South Carolina. It was in force for 26 min. 4 reports 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, 4:19 PM EDT (20:19 UTC)
Expired
May 3, 2021, 4:45 PM EDT
In force
26 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Kershaw County, SC, Lee County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 89 km from the middle of the area, began a volume at 20:17 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

TimeReportWhereRemark
May 3, 4:32 PM EDTHAIL 1.753 Wnw Oswego, SC
May 3, 4:45 PM EDTTSTM WND DMG6 Ne Oswego, SCREPORT OF 3 TREES DOWN ON A ROADWAY AND 1 POWER LINE DOWN IN THE MANVILLE-ST. CHARLES ROAD AREA BETWEEN ST. CHARLES ROAD AND DOG ISLAND ROAD.
May 3, 4:45 PM EDTHAIL 0.56 Ne Oswego, SCPICTURE OF SMALL HAIL SENT IN FROM THE LEE COUNTY EM.
May 3, 4:55 PM EDTHAIL 1.75Lynchburg, SCTWEET AND PHOTO SENT IN REPORTING UP TO GOLF BALL SIZED HAIL.

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.

IssuedProductOfficeLasted
May 3, 1:25 PM EDTTornado WatchSPC6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.3 hours before the alert went out and 135 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2021-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1333 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2021-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

446 
WUUS52 KCAE 032019
SVRCAE
SCC055-061-085-032045-
/O.NEW.KCAE.SV.W.0021.210503T2019Z-210503T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
419 PM EDT Mon May 3 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Lee County in central South Carolina...
  Northern Sumter County in central South Carolina...
  Southeastern Kershaw County in central South Carolina...

* Until 445 PM EDT.

* At 418 PM EDT, a severe thunderstorm was located 8 miles northwest
  of Sumter County Airport, or 8 miles north of Shaw Air Base, moving
  east at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Sumter, Bishopville, Shaw Air Base, Lee State Park, Oakland, Sumter
  County Airport, Elliott, Mulberry, Mayesville, Lynchburg, Ashwood,
  Oswego, Dalzell, Manville, Spring Hill, St. Charles, Cherryvale,
  Rembert, Wisacky and Woodrow.

This includes Interstate 20 in South Carolina between mile markers
111 and 126.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM EDT for central South
Carolina.

For your protection seek shelter inside a sturdy building and stay
away from windows.

&&

LAT...LON 3398 8003 3394 8052 3416 8054 3427 8013
      3423 8011 3420 8011 3416 8016 3412 8013
      3409 8008 3407 8004
TIME...MOT...LOC 2018Z 258DEG 29KT 3409 8043 

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

CRL

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 2:35 PM EDTSpecial Weather StatementCAEMcCormick25 min
May 3, 3:05 PM EDTTornado WarningCAENewberry40 min
May 3, 3:24 PM EDTSevere Thunderstorm WarningCAENewberry, Saluda51 min
May 3, 3:28 PM EDTSevere Thunderstorm WarningCAELexington, Saluda32 min
May 3, 3:32 PM EDTSevere Thunderstorm WarningCAENewberry43 min
May 3, 3:39 PM EDTTornado WarningCAELexington21 min
May 3, 3:51 PM EDTSevere Thunderstorm WarningCAEMcCormick39 min
May 3, 3:59 PM EDTSevere Thunderstorm WarningCAELexington, Richland31 min
May 3, 4:03 PM EDTSevere Thunderstorm WarningCAEKershaw, Richland, Sumter27 min
May 3, 4:05 PM EDTSevere Thunderstorm WarningCAELexington, Newberry, Richland, Saluda40 min
May 3, 4:22 PM EDTSevere Thunderstorm WarningCAECalhoun, Kershaw, Lexington, Richland23 min
May 3, 4:30 PM EDTSevere Thunderstorm WarningCAELexington, Richland15 min
May 3, 4:41 PM EDTSevere Thunderstorm WarningCAELee, Sumter34 min
May 3, 4:44 PM EDTSevere Thunderstorm WarningCAEKershaw, Lee, Richland, Sumter31 min
May 3, 4:56 PM EDTAreal Flood AdvisoryCAELexington, Richland2 hr
May 3, 5:14 PM EDTSevere Thunderstorm WarningCAEClarendon, Lee, Richland, Sumter46 min
May 3, 5:50 PM EDTSpecial Weather StatementCAELee25 min
May 3, 6:01 PM EDTSevere Thunderstorm WarningCAEBamberg, Barnwell44 min
May 3, 6:44 PM EDTSevere Thunderstorm WarningCAEBamberg, Orangeburg46 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2021Every 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.