Alert archive / South Carolina / Tornado Warnings in 2011

Tornado Warning 7, NWS Wilmington, NC

April 16, 20115 counties in South Carolina

NWS Wilmington, NC issued this tornado warning at Apr 16, 2011, 5:03 PM EDT for 5 counties in South Carolina. It was in force for 42 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: Apr 16, 2011, 5:03 PM EDT (21:03 UTC)
Expired: Apr 16, 2011, 5:45 PM EDT
In force: 42 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

Counties Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 91 km from the middle of the area, began a volume at 21:07 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
Apr 16, 5:32 PM EDT	HAIL 1.75	2 Sw Conway, SC
Apr 16, 5:37 PM EDT	HAIL 1.25	6 Se Aynor, SC

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
Apr 16, 12:02 PM EDT	Tornado Watch PDS	SPC	11 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.1 hours before the alert went out and 117 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: 421 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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.

106 
WFUS52 KILM 162103
TORILM
SCC041-043-051-067-089-162145-
/O.NEW.KILM.TO.W.0007.110416T2103Z-110416T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
503 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN HORRY COUNTY IN NORTHEAST SOUTH CAROLINA
  NORTHERN GEORGETOWN COUNTY IN NORTHEAST SOUTH CAROLINA
  NORTHERN WILLIAMSBURG COUNTY IN NORTHEAST SOUTH CAROLINA
  SOUTHEASTERN MARION COUNTY IN NORTHEAST SOUTH CAROLINA
  SOUTHEASTERN FLORENCE COUNTY IN NORTHEAST SOUTH CAROLINA

* UNTIL 545 PM EDT

* AT 458 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  INDIANTOWN...OR ABOUT 14 MILES EAST OF KINGSTREE...MOVING NORTHEAST
  AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
   HEMINGWAY...
   OUTLAND...
   BRITTON NECK...
   PEE DEE CROSSROADS...
   HORRY...
   HOMEWOOD...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLF 
BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET UNDER A TABLE OR OTHER PIECE OF STURDY FURNITURE. 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 900 PM EDT SATURDAY EVENING
FOR SOUTHEAST NORTH CAROLINA AND NORTHEAST SOUTH CAROLINA.

&&

PLEASE REPORT HAIL...DOWNED TREES OR DAMAGING WINDS TO THE NATIONAL
WEATHER SERVICE IN WILMINGTON NC...TOLL FREE AT 877-633-6772...WHEN
YOU CAN DO SO SAFELY.

LAT...LON 3406 7914 3380 7896 3352 7983 3368 7993
TIME...MOT...LOC 2103Z 246DEG 41KT 3373 7953

$$

DCH

1 follow-up statement

448 
WWUS52 KILM 162151
SVSILM

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
551 PM EDT SAT APR 16 2011

SCC041-043-051-067-089-162200-
/O.EXP.KILM.TO.W.0007.000000T0000Z-110416T2145Z/
FLORENCE SC-MARION SC-WILLIAMSBURG SC-GEORGETOWN SC-HORRY SC-
551 PM EDT SAT APR 16 2011

...THE TORNADO WARNING FOR WEST CENTRAL HORRY...NORTH CENTRAL
GEORGETOWN...NORTHERN WILLIAMSBURG...SOUTHERN MARION AND SOUTHEASTERN
FLORENCE COUNTIES HAS EXPIRED...

AT 545 PM EDT...THE THUNDERSTORMS PRODUCING POSSIBLE TORNADOES
WHICH PROMPTED THE WARNING HAVE WEAKENED...AND ALSO MOVED OUT OF THE 
WARNED AREA. THUS THE TORNADO WARNING WAS ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING 
FOR SOUTHEAST NORTH CAROLINA AND NORTHEAST SOUTH CAROLINA.

PLEASE REPORT HAIL...DOWNED TREES OR DAMAGING WINDS TO THE NATIONAL
WEATHER SERVICE IN WILMINGTON NC...TOLL FREE AT 877-633-6772...WHEN
YOU CAN DO SO SAFELY.

LAT...LON 3406 7914 3380 7896 3352 7983 3368 7993
TIME...MOT...LOC 2103Z 246DEG 41KT 3373 7953

$$

DCH

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 16, 12:07 PM EDT	Tornado Warning	ILM	Dillon, Horry, Marion	37 min
Apr 16, 1:16 PM EDT	Special Weather Statement	ILM	Horry	29 min
Apr 16, 2:16 PM EDT	Severe Thunderstorm Warning	ILM	Darlington, Dillon, Florence, Marlboro	44 min
Apr 16, 2:48 PM EDT	Tornado Warning	ILM	Darlington, Dillon, Marlboro	42 min
Apr 16, 3:15 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Marlboro	70 min
Apr 16, 3:27 PM EDT	Tornado Warning	ILM	Dillon, Marlboro	48 min
Apr 16, 3:40 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence, Georgetown, Horry, Marion, Williamsburg	35 min
Apr 16, 4:17 PM EDT	Tornado Warning	ILM	Dillon, Horry, Marion	58 min
Apr 16, 4:18 PM EDT	Tornado Warning	ILM	Florence, Williamsburg	42 min
Apr 16, 4:49 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence, Horry, Marion, Williamsburg	41 min
Apr 16, 5:03 PM EDT	Tornado Warning	ILM	Dillon, Horry	57 min
Apr 16, 5:28 PM EDT	Tornado Warning	ILM	Georgetown, Williamsburg	47 min
Apr 16, 5:48 PM EDT	Severe Thunderstorm Warning	ILM	Horry	42 min
Apr 16, 6:19 PM EDT	Tornado Warning	ILM	Georgetown	26 min
Apr 16, 6:47 PM EDT	Special Marine Warning	ILM		43 min
Apr 16, 7:10 PM EDT	Special Marine Warning	ILM		110 min
Apr 16, 7:48 PM EDT	Special Marine Warning	ILM		57 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.