Alert archive / South Carolina / Tornado Warnings in 2010

Tornado Warning 9, NWS Columbia, SC

July 12, 2010Chesterfield County, Lancaster County, South Carolina

NWS Columbia, SC issued this tornado warning at Jul 12, 2010, 2:55 PM EDT for Chesterfield County, Lancaster County, South Carolina. It was in force for 50 min. 1 report 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
Jul 12, 2010, 2:55 PM EDT (18:55 UTC)
Expired
Jul 12, 2010, 3:45 PM EDT
In force
50 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

Counties Chesterfield County, SC, Lancaster County, SC

The radar

The Columbia radar (KCAE), 101 km from the middle of the area, began a volume at 18:56 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
Jul 12, 2:57 PM EDTTORNADO10 Ene Lancaster, SCAN EF1 TORNADO TOOK DOWN NUMEROUS TREES AND DID MINOR DAMAGE TO AROUND 25 HOMES.

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
Jul 12, 1:14 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.9 hours before the alert went out and 165 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, Greensboro/Hi Pt, NC at 12:00Z on 2010-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2227 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2010-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
2227 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
533 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

744 
WFUS52 KCAE 121855
TORCAE
SCC025-057-121945-
/O.NEW.KCAE.TO.W.0009.100712T1855Z-100712T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
255 PM EDT MON JUL 12 2010

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

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

* UNTIL 345 PM EDT

* AT 247 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES WEST OF
  PAGELAND...OR ABOUT 12 MILES EAST OF LANCASTER...MOVING SOUTH AT 15
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  KERSHAW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING ONE 
INCH HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 3461 8023 3461 8042 3451 8066 3481 8071
      3481 8035
TIME...MOT...LOC 1855Z 345DEG 14KT 3475 8058

$$

LM
1 follow-up statement
156 
WWUS52 KCAE 121911
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
311 PM EDT MON JUL 12 2010

SCC025-057-121945-
/O.CON.KCAE.TO.W.0009.000000T0000Z-100712T1945Z/
LANCASTER SC-CHESTERFIELD SC-
311 PM EDT MON JUL 12 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
CHESTERFIELD AND LANCASTER COUNTIES...

AT 305 PM EDT...THE PUBLIC REPORTED A POSSIBLE TORNADO.  THIS 
TORNADO WAS LOCATED ON SHALLOW UNITY ROAD...SOUTHEAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
JEFFERSON AND KERSHAW

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.


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

&&

LAT...LON 3461 8023 3461 8042 3451 8066 3481 8071
      3481 8035
TIME...MOT...LOC 1910Z 345DEG 14KT 3469 8056

$$

LM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 1:57 PM EDTSevere Thunderstorm WarningCAELancaster63 min
Jul 12, 3:03 PM EDTSevere Thunderstorm WarningCAEFairfield, Kershaw, Lancaster42 min
Jul 12, 3:18 PM EDTSevere Thunderstorm WarningCAEEdgefield, McCormick57 min
Jul 12, 3:20 PM EDTSevere Thunderstorm WarningCAEBamberg, Orangeburg40 min
Jul 12, 3:31 PM EDTSevere Thunderstorm WarningCAEBamberg, Barnwell, Orangeburg44 min
Jul 12, 3:45 PM EDTSevere Thunderstorm WarningCAERichland, Sumter45 min
Jul 12, 3:49 PM EDTSevere Thunderstorm WarningCAEFairfield, Kershaw, Lancaster41 min
Jul 12, 4:12 PM EDTTornado WarningCAELancaster48 min
Jul 12, 4:20 PM EDTTornado WarningCAERichland, Sumter25 min
Jul 12, 4:26 PM EDTSevere Thunderstorm WarningCAEOrangeburg49 min
Jul 12, 4:30 PM EDTSevere Thunderstorm WarningCAERichland, Sumter45 min
Jul 12, 4:37 PM EDTAreal Flood AdvisoryCAERichland, Sumter113 min
Jul 12, 4:44 PM EDTSevere Thunderstorm WarningCAECalhoun, Orangeburg, Richland46 min
Jul 12, 4:58 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Orangeburg, Sumter62 min
Jul 12, 5:13 PM EDTTornado WarningCAEClarendon, Lee, Sumter47 min
Jul 12, 5:17 PM EDTSevere Thunderstorm WarningCAEBamberg, Calhoun, Orangeburg20 min
Jul 12, 5:26 PM EDTTornado WarningCAECalhoun, Clarendon, Orangeburg49 min
Jul 12, 5:53 PM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Kershaw, Lee, Orangeburg, Richland and 1 more112 min

Nearby

Tornado Warnings in South Carolina, 2010Every tornado warning in 2010Tornadoes in 2010

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.