Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Wilmington, NC

May 10, 2011Florence County, Georgetown County, Williamsburg County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at May 10, 2011, 7:16 PM EDT for Florence County, Georgetown County, Williamsburg County, South Carolina. It was in force for 31 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: May 10, 2011, 7:16 PM EDT (23:16 UTC)
Expired: May 10, 2011, 7:47 PM EDT
In force: 31 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

Counties Florence County, SC, Georgetown County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 94 km from the middle of the area, began a volume at 23:18 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
May 10, 7:38 PM EDT	HAIL 1	Nesmith, 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
May 10, 3:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.3 hours before the alert went out and 112 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: 904 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

777 
WUUS52 KILM 102316
SVRILM
SCC041-043-089-110015-
/O.NEW.KILM.SV.W.0039.110510T2316Z-110511T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
716 PM EDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN WILMINGTON NC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GEORGETOWN COUNTY IN NORTHEAST SOUTH CAROLINA
  NORTHEASTERN WILLIAMSBURG COUNTY IN NORTHEAST SOUTH CAROLINA
  SOUTHEASTERN FLORENCE COUNTY IN NORTHEAST SOUTH CAROLINA

* UNTIL 815 PM EDT

* AT 713 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  BASEBALL SIZE.  THIS STORM WAS LOCATED NEAR INDIANTOWN...OR 15
  MILES SOUTHEAST OF LAKE CITY...AND MOVING SOUTH AT 45 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...
   NESMITH...

MORE DANGEROUS THUNDERSTORMS MAY DEVELOP AND AFFECT OTHER COMMUNITIES
IN THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

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 3362 7966 3392 7966 3394 7948 3393 7945
      3390 7943 3389 7941 3374 7929 3372 7929
      3372 7927 3371 7928 3371 7927 3367 7923
TIME...MOT...LOC 2316Z 348DEG 41KT 3375 7951

$$

III

2 follow-up statements

439 
WWUS52 KILM 102341
SVSILM

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
741 PM EDT TUE MAY 10 2011

SCC041-102351-
/O.CAN.KILM.SV.W.0039.000000T0000Z-110511T0015Z/
FLORENCE SC-
741 PM EDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FLORENCE COUNTY
IS CANCELED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
TUESDAY 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 3362 7966 3364 7966 3367 7966 3374 7929
      3372 7929 3372 7927 3371 7928 3367 7923
TIME...MOT...LOC 2341Z 344DEG 28KT 3359 7951

$$

SCC043-089-110015-
/O.CON.KILM.SV.W.0039.000000T0000Z-110511T0015Z/
WILLIAMSBURG SC-GEORGETOWN SC-
741 PM EDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTH CENTRAL GEORGETOWN AND EAST CENTRAL WILLIAMSBURG
COUNTIES...

AT 736 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM CAPABLE OF
PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR NESMITH...
OR 18 MILES EAST OF KINGSTREE...MOVING SOUTH AT 30 MPH.

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 3362 7966 3364 7966 3367 7966 3374 7929
      3372 7929 3372 7927 3371 7928 3367 7923
TIME...MOT...LOC 2341Z 344DEG 28KT 3359 7951

$$

III

594 
WWUS52 KILM 102347
SVSILM

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
747 PM EDT TUE MAY 10 2011

SCC043-089-102357-
/O.CAN.KILM.SV.W.0039.000000T0000Z-110511T0015Z/
WILLIAMSBURG SC-GEORGETOWN SC-
747 PM EDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL GEORGETOWN AND
EAST CENTRAL WILLIAMSBURG COUNTIES IS CANCELED...

AT 746 PM EDT...THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING
HAS MOVED OUT OF THE WARNED AREA...THUS THE WARNING HAS BEEN
CANCELED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
TUESDAY 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 3362 7966 3364 7966 3367 7966 3374 7929
      3372 7929 3372 7927 3371 7928 3367 7923
TIME...MOT...LOC 2347Z 344DEG 28KT 3354 7949

$$

III

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 4:33 PM EDT	Severe Thunderstorm Warning	ILM	Horry	42 min
May 10, 5:15 PM EDT	Severe Thunderstorm Warning	ILM	Horry	30 min
May 10, 5:18 PM EDT	Special Marine Warning	ILM		57 min
May 10, 5:27 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Marion	63 min
May 10, 5:39 PM EDT	Tornado Warning	ILM	Horry	30 min
May 10, 5:48 PM EDT	Special Marine Warning	ILM		57 min
May 10, 6:13 PM EDT	Severe Thunderstorm Warning	ILM	Horry, Marion	77 min
May 10, 6:19 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Georgetown, Williamsburg	56 min
May 10, 6:31 PM EDT	Special Marine Warning	ILM		59 min
May 10, 6:40 PM EDT	Severe Thunderstorm Warning	ILM	Dillon, Horry, Marion	50 min
May 10, 7:12 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown, Williamsburg	63 min
May 10, 7:24 PM EDT	Special Marine Warning	ILM		66 min
May 10, 7:24 PM EDT	Tornado Warning	ILM	Georgetown, Williamsburg	51 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011 Every severe thunderstorm warning 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.