Alert archive / South Carolina / Tornado Warnings in 2011

Tornado Warning 14, NWS Wilmington, NC

April 28, 2011Florence County, Marion County, South Carolina

NWS Wilmington, NC issued this tornado warning at Apr 28, 2011, 8:31 AM EDT for Florence County, Marion County, South Carolina. It was in force for 24 min. 3 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 28, 2011, 8:31 AM EDT (12:31 UTC)
Expired: Apr 28, 2011, 8:55 AM EDT
In force: 24 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

Counties Florence County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 103 km from the middle of the area, began a volume at 12:32 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 28, 8:40 AM EDT	TSTM WND DMG	Evergreen, SC	A FEW PINE TREES AND LARGE TREE LIMBS DOWN.
Apr 28, 8:47 AM EDT	TSTM WND DMG	2 Ese Coward, SC	TREE REPORTED ON CHURCH AT INTERSECTION OF E FRIENDFIELD RD AND UNION SCHOOL RD.
Apr 28, 9:00 AM EDT	TSTM WND DMG	Coward, SC	FRONT PORCH DESTROYED AND ADDITIONAL DAMAGE TO MOBILE HOME ON E FRIENDFIELD RD NEAR HWY 52.

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 28, 4:30 AM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 0.5 hours before the alert went out and 126 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: 1847 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 685 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

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

504 
WFUS52 KILM 281231
TORILM
SCC041-067-281315-
/O.NEW.KILM.TO.W.0014.110428T1231Z-110428T1315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
831 AM EDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A

* TORNADO WARNING FOR...
  MARION COUNTY IN NORTHEAST SOUTH CAROLINA
  FLORENCE COUNTY IN NORTHEAST SOUTH CAROLINA

* UNTIL 915 AM EDT

* AT 827 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES
  SOUTHWEST OF NEW HOPE...OR ABOUT 7 MILES NORTHWEST OF LAKE CITY...
  MOVING EAST AT 50 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
   FRIENDFIELD...
   HYMAN...
   PAMPLICO...
   GRESHAM...
   BRITTON NECK...
   RAINS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
QUARTER 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 NOON EDT THURSDAY 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 3402 7992 3423 7915 3398 7934 3391 7931
      3390 7928 3386 7926 3388 7987 3394 7986
TIME...MOT...LOC 1230Z 256DEG 48KT 3395 7978

$$

HAWKINS

1 follow-up statement

609 
WWUS52 KILM 281255
SVSILM

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
855 AM EDT THU APR 28 2011

SCC041-067-281305-
/O.CAN.KILM.TO.W.0014.000000T0000Z-110428T1315Z/
FLORENCE SC-MARION SC-
855 AM EDT THU APR 28 2011

...THE TORNADO WARNING FOR CENTRAL MARION AND CENTRAL FLORENCE
COUNTIES IS CANCELED...

AT 854 AM EDT...THE THUNDERSTORM PRODUCING THE POSSIBLE TORNADO WHICH
PROMPTED THE WARNING HAS WEAKENED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EDT THURSDAY AFTERNOON
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 3402 7992 3423 7915 3398 7934 3391 7931
      3390 7928 3386 7926 3388 7987 3394 7986
TIME...MOT...LOC 1255Z 256DEG 48KT 3403 7939

$$

HAWKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 7:14 AM EDT	Severe Thunderstorm Warning	ILM	Darlington, Marlboro	61 min
Apr 28, 8:12 AM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence, Marion, Williamsburg	63 min
Apr 28, 9:37 AM EDT	Severe Thunderstorm Warning	ILM	Florence, Marion, Williamsburg	53 min
Apr 28, 9:40 AM EDT	Special Weather Statement	ILM	Horry	50 min
Apr 28, 10:16 AM EDT	Tornado Warning	ILM	Dillon, Florence, Horry, Marion	44 min
Apr 28, 10:41 AM EDT	Severe Thunderstorm Warning	ILM	Dillon, Florence, Horry, Marion	64 min
Apr 28, 11:09 AM EDT	Special Marine Warning	ILM		54 min
Apr 28, 11:17 AM EDT	Special Weather Statement	ILM	Darlington, Marlboro	58 min
Apr 28, 11:33 AM EDT	Severe Thunderstorm Warning	ILM	Darlington, Dillon, Florence, Marlboro	57 min
Apr 28, 11:51 AM EDT	Special Weather Statement	ILM	Dillon	54 min
Apr 28, 12:15 PM EDT	Tornado Warning	ILM	Dillon, Marlboro	34 min
Apr 28, 12:42 PM EDT	Tornado Warning	ILM	Dillon	48 min
Apr 28, 1:51 PM EDT	Special Weather Statement	ILM	Dillon, Florence, Marion	54 min
Apr 28, 2:01 PM EDT	Special Weather Statement	ILM	Williamsburg	59 min
Apr 28, 2:24 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Horry, Marion	51 min
Apr 28, 3:55 PM EDT	Special Weather Statement	ILM	Horry	50 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.