Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 40, NWS Columbia, SC

May 4, 2021Burke County, Richmond County, Georgia; 4 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 4, 2021, 5:30 PM EDT for Burke County, Richmond County, Georgia; 4 counties in South Carolina. It was in force for 60 min. 2 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 4, 2021, 5:30 PM EDT (21:30 UTC)
Expired: May 4, 2021, 6:30 PM EDT
In force: 60 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Burke County, GA, Richmond County, GA, Aiken County, SC, Barnwell County, SC, Lexington County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 52 km from the middle of the area, began a volume at 21:29 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 4, 5:30 PM EDT	TSTM WND DMG	6 Sse Clearwater, SC	BEECH ISLAND FIRE DEPARTMENT REPORTS TREE BLOCKING ROADWAY AND POWER LINE DOWN ON SHERATON DRIVE. TIME ESTIMATED BY RADAR.
May 4, 5:33 PM EDT	TSTM WND DMG	4 Nw Aiken, SC	SC HIGHWAY PATROL REPORTS TREE DOWN ALONG TROLLY LINE RD NEAR PROUD PACER. TIME ESTIMATED BY RADAR.

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
May 4, 4:56 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.5 hours before the alert went out and 143 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: 573 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

773 
WUUS52 KCAE 042130
SVRCAE
GAC033-245-SCC003-011-063-075-042230-
/O.NEW.KCAE.SV.W.0040.210504T2130Z-210504T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
530 PM EDT Tue May 4 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northern Burke County in east central Georgia...
  Richmond County in east central Georgia...
  Barnwell County in central South Carolina...
  Southern Lexington County in central South Carolina...
  Aiken County in central South Carolina...
  Northwestern Orangeburg County in central South Carolina...

* Until 630 PM EDT.

* At 529 PM EDT, severe thunderstorms were located along a line
  extending from 8 miles southwest of Red Bank to near Hephzibah, 
  moving southeast at 25 mph. Additional isolated severe 
  thunderstorms were also located ahead of this line. 

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Aiken, North Augusta, Waynesboro, Fort Gordon, Augusta, Clearwater,
  Savannah River Site, Aiken Mall, Plant Vogtle, Belvedere, Red Bank,
  Hephzibah, Williston, Blackville, New Ellenton, Jackson, Glendale,
  South Augusta, Summerville and Augusta Mall.

This includes the following highways...
 Interstate 20 in South Carolina between mile markers 3 and 50.
 Interstate 520 in Georgia between mile markers 2 and 15.
 Interstate 520 in South Carolina between mile markers 16 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways or
walk through high water.

&&

LAT...LON 3326 8225 3331 8233 3396 8134 3377 8106
      3375 8106 3375 8103 3373 8100 3371 8104
      3370 8104 3363 8097 3364 8094 3361 8094
      3360 8092 3341 8119 3344 8122 3340 8121
      3295 8184 3294 8191
TIME...MOT...LOC 2129Z 304DEG 21KT 3386 8135 3327 8212 

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

JAQ

2 follow-up statements

667 
WWUS52 KCAE 042157
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
557 PM EDT Tue May 4 2021

GAC033-245-SCC003-011-063-075-042230-
/O.CON.KCAE.SV.W.0040.000000T0000Z-210504T2230Z/
Burke GA-Richmond GA-Barnwell SC-Lexington SC-Aiken SC-Orangeburg SC-
557 PM EDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHERN BURKE...RICHMOND...BARNWELL...SOUTHEASTERN LEXINGTON...
AIKEN AND NORTHWESTERN ORANGEBURG COUNTIES...

At 556 PM EDT, severe thunderstorms were located along a line
extending from 11 miles northwest of Orangeburg to near Hephzibah,
moving southeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Aiken, North Augusta, Waynesboro, Savannah River Site, Aiken Mall,
Plant Vogtle, Clearwater, Hephzibah, Williston, Blackville, New
Ellenton, Jackson, Gaston, South Augusta, Citizens Park, Augusta
Regional Airport, Alexander, Burke County Airport, McBean and
Gloverville.

This includes the following highways...
 Interstate 520 in Georgia between mile markers 6 and 15.
 Interstate 520 in South Carolina near mile marker 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways 
or walk through high water.

Report any hail, damaging winds or flooding directly to the Columbia 
National Weather Service at 803 234 4115 when it is safe to do so.
You can also send reports by Facebook or Twitter to NWSColumbia or 
by e-mail at NWS.Columbia@noaa.gov.

&&

LAT...LON 3326 8225 3331 8233 3382 8113 3377 8106
      3375 8106 3375 8103 3373 8100 3371 8104
      3370 8104 3363 8097 3364 8094 3361 8094
      3360 8092 3341 8119 3344 8122 3340 8121
      3295 8184 3294 8191
TIME...MOT...LOC 2156Z 314DEG 25KT 3361 8102 3325 8213 

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

JAQ

085 
WWUS52 KCAE 042228
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
628 PM EDT Tue May 4 2021

GAC033-245-SCC003-011-063-075-042237-
/O.EXP.KCAE.SV.W.0040.000000T0000Z-210504T2230Z/
Burke GA-Richmond GA-Barnwell SC-Lexington SC-Aiken SC-Orangeburg SC-
628 PM EDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BURKE...RICHMOND...
BARNWELL...SOUTHEASTERN LEXINGTON...AIKEN AND NORTHWESTERN ORANGEBURG
COUNTIES WILL EXPIRE AT 630 PM EDT...
    
The storms which prompted the warning have weakened below severe 
limits or have exited the warned 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 900 PM EDT for
east central Georgia...and central South Carolina.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Columbia.

LAT...LON 3326 8225 3331 8233 3382 8113 3377 8106
      3375 8106 3375 8103 3373 8100 3371 8104
      3370 8104 3363 8097 3364 8094 3361 8094
      3360 8092 3341 8119 3344 8122 3340 8121
      3295 8184 3294 8191
TIME...MOT...LOC 2227Z 304DEG 21KT 3351 8085 3315 8196 

$$

JAQ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 4:38 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Lincoln, McDuffie	53 min
May 4, 6:37 PM EDT	Special Weather Statement	CAE	Burke	23 min
May 4, 3:29 PM EDT	Special Weather Statement	CAE	Saluda	31 min
May 4, 3:42 PM EDT	Special Weather Statement	CAE	Lexington	33 min
May 4, 3:45 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Newberry, Richland, Saluda	45 min
May 4, 3:50 PM EDT	Special Weather Statement	CAE	Newberry	25 min
May 4, 3:52 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Lexington, Richland	41 min
May 4, 3:54 PM EDT	Special Weather Statement	CAE	McCormick	36 min
May 4, 3:54 PM EDT	Severe Thunderstorm Warning	CAE	Lancaster	36 min
May 4, 4:00 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry, Saluda	45 min
May 4, 4:16 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Lancaster, Newberry, Richland	59 min
May 4, 4:22 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Fairfield, Kershaw, Lancaster, Lee	53 min
May 4, 4:46 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Newberry, Richland	44 min
May 4, 5:03 PM EDT	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster, Lee	57 min
May 4, 6:03 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Calhoun, Orangeburg, Richland	57 min
May 4, 6:07 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon, Lee, Richland, Sumter	53 min
May 4, 6:57 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon	48 min

Nearby

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