Alert archive / South Carolina / Tornado Warnings in 2012

Tornado Warning 11, NWS Columbia, SC

June 11, 2012Calhoun County, Orangeburg County, South Carolina

NWS Columbia, SC issued this tornado warning at Jun 11, 2012, 1:09 PM EDT for Calhoun County, Orangeburg 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: Jun 11, 2012, 1:09 PM EDT (17:09 UTC)
Expired: Jun 11, 2012, 1:45 PM EDT
In force: 36 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Calhoun County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 48 km from the middle of the area, began a volume at 17:12 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 12:00Z, 5.2 hours before the alert went out and 109 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: 389 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

936 
WFUS52 KCAE 111709
TORCAE
SCC017-075-111745-
/O.NEW.KCAE.TO.W.0011.120611T1709Z-120611T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
109 PM EDT MON JUN 11 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* TORNADO WARNING FOR...
  CALHOUN COUNTY IN CENTRAL SOUTH CAROLINA
  CENTRAL ORANGEBURG COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 145 PM EDT

* AT 1259 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  NORTHWEST OF ORANGEBURG AND ANOTHER STORM JUST EAST OF ORANGEBURG.
  BOTH STORMS WERE MOVING NORTHEAST AT 25 MPH..

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BROOKDALE...ST. MATTHEWS AND ELLOREE

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.

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 3335 8103 3360 8100 3379 8086 3376 8078
      3377 8077 3374 8063 3344 8041
TIME...MOT...LOC 1708Z 222DEG 18KT 3357 8092

$$

SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 9:30 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	45 min
Jun 10, 9:34 PM EDT	Tornado Warning	CAE	Newberry	26 min
Jun 10, 9:57 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield	78 min
Jun 11, 11:57 AM EDT	Areal Flood Advisory	CAE	Aiken, Barnwell	108 min
Jun 11, 12:10 PM EDT	Areal Flood Advisory	CAE	Lexington, Richland	65 min
Jun 11, 12:32 PM EDT	Flash Flood Warning	CAE	Richland	50 min
Jun 11, 12:39 PM EDT	Flood Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	39 hr
Jun 11, 12:39 PM EDT	Areal Flood Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Clarendon, Fairfield and 7 more	111 min
Jun 11, 1:59 PM EDT	Areal Flood Advisory	CAE	Chesterfield, Kershaw, Lancaster	2 hr
Jun 11, 2:53 PM EDT	Areal Flood Advisory	CAE	Bamberg, Clarendon, Lee, Orangeburg, Sumter	112 min

Nearby

Tornado Warnings in South Carolina, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.