Alert archive / South Carolina / Tornado Warnings in 2011

Tornado Warning 11, NWS Columbia, SC

September 5, 2011Lancaster County, South Carolina

NWS Columbia, SC issued this tornado warning at Sep 5, 2011, 6:47 PM EDT for Lancaster County, South Carolina. It was in force for 28 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: Sep 5, 2011, 6:47 PM EDT (22:47 UTC)
Expired: Sep 5, 2011, 7:15 PM EDT
In force: 28 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 105 km from the middle of the area, began a volume at 22:49 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
Sep 5, 3:42 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.8 hours before the alert went out and 160 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: 109 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

529 
WFUS52 KCAE 052247
TORCAE
SCC057-052315-
/O.NEW.KCAE.TO.W.0011.110905T2247Z-110905T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
647 PM EDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 715 PM EDT

* AT 645 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 11
  MILES WEST OF LANCASTER...MOVING NORTHEAST AT 30 MPH.

* THE TORNADO MAY AFFECT THE VICINITIES OF VAN WYCK...INDIANLAND...
  AND ANDREW JACKSON STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE...TOLL FREE 1 877 6 3
3...6 7 7 2.

LAT...LON 3494 8078 3483 8079 3482 8067 3471 8087
      3475 8088 3479 8088 3483 8091 3484 8087
      3490 8088 3492 8087 3498 8089 3502 8086
TIME...MOT...LOC 2245Z 234DEG 25KT 3479 8093

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 1:18 PM EDT	Lake Wind Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	29 hr
Sep 5, 5:13 PM EDT	Tornado Warning	CAE	Fairfield, Newberry	47 min
Sep 5, 5:24 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell	36 min
Sep 5, 5:59 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Bamberg, Barnwell, Calhoun, Lexington, Orangeburg	46 min
Sep 5, 6:37 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Calhoun, Edgefield, Fairfield, Kershaw, Lexington and 3 more	38 min
Sep 5, 7:16 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	29 min

Nearby

Tornado Warnings in South Carolina, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.