Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Columbia, SC

March 18, 2021Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Mar 18, 2021, 5:24 PM EDT for Lancaster County, South Carolina. It was in force for 36 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: Mar 18, 2021, 5:24 PM EDT (21:24 UTC)
Expired: Mar 18, 2021, 6:00 PM EDT
In force: 36 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 91 km from the middle of the area, began a volume at 21:25 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 18, 2:08 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.4 hours before the alert went out and 170 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 470 m²/s²
0-3 km storm-relative helicity: 562 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

840 
WUUS52 KCAE 182124
SVRCAE
SCC057-182200-
/O.NEW.KCAE.SV.W.0002.210318T2124Z-210318T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
524 PM EDT Thu Mar 18 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Southern Lancaster County in central South Carolina...

* Until 600 PM EDT.

* At 523 PM EDT, severe thunderstorms were located along a line
  extending from USC Lancaster to near Great Falls, moving northeast
  at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lancaster, Elgin, Heath Springs, USC Lancaster, Irwin, Buford, Bell
  Town Fire Station, Arrowood Estates, Tradesville, Camp Creek Fire
  Station, Antioch, Kirk Air Base, Faith Christian School, Pleasant
  Hill, Unity Fire Station, Lancaster Mill, Bear Creek Park and
  McDonald Green Elementary School.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for central South
Carolina.

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

&&

LAT...LON 3479 8055 3477 8052 3475 8051 3465 8055
      3450 8089 3451 8088 3455 8087 3460 8089
      3479 8083 3482 8078 3482 8057
TIME...MOT...LOC 2123Z 240DEG 25KT 3476 8078 3457 8085 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$
fwa

2 follow-up statements

920 
WWUS52 KCAE 182138
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
538 PM EDT Thu Mar 18 2021

SCC057-182200-
/O.CON.KCAE.SV.W.0002.000000T0000Z-210318T2200Z/
Lancaster SC-
538 PM EDT Thu Mar 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR CENTRAL LANCASTER COUNTY...

At 538 PM EDT, severe thunderstorms were located along a line
extending from near Buford to near Elgin, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lancaster, Elgin, Heath Springs, Buford, Tradesville, Camp Creek Fire
Station, Antioch, Kirk Air Base, Pleasant Hill, Unity Fire Station,
Bear Creek Park, McDonald Green Elementary School and Lancaster Mill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for central South
Carolina.

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

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 3479 8055 3477 8052 3475 8051 3465 8055
      3456 8078 3482 8078 3482 8057
TIME...MOT...LOC 2138Z 240DEG 25KT 3481 8067 3462 8074 

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

fwa

519 
WWUS52 KCAE 182156
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
556 PM EDT Thu Mar 18 2021

SCC057-182206-
/O.EXP.KCAE.SV.W.0002.000000T0000Z-210318T2200Z/
Lancaster SC-
556 PM EDT Thu Mar 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LANCASTER COUNTY WILL
EXPIRE AT 600 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 600 PM EDT for 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 3479 8055 3477 8052 3475 8051 3465 8055
      3456 8078 3482 8078 3482 8057
TIME...MOT...LOC 2156Z 240DEG 25KT 3487 8054 3468 8061 

$$

fwa

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 2:34 PM EDT	Special Weather Statement	CAE	McCormick	26 min
Mar 18, 3:19 PM EDT	Special Weather Statement	CAE	Newberry	26 min
Mar 18, 3:34 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	41 min
Mar 18, 4:24 PM EDT	Special Weather Statement	CAE	Fairfield	51 min
Mar 18, 5:01 PM EDT	Special Weather Statement	CAE	Lancaster	29 min
Mar 18, 5:48 PM EDT	Special Weather Statement	CAE	Fairfield	42 min
Mar 18, 5:51 PM EDT	Special Weather Statement	CAE	Chesterfield	24 min
Mar 18, 7:48 PM EDT	Special Weather Statement	CAE	Chesterfield	42 min
Mar 18, 7:58 PM EDT	Special Weather Statement	CAE	Lancaster	32 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.