Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 37, NWS Columbia, SC

April 16, 20114 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Apr 16, 2011, 1:33 PM EDT for 4 counties in South Carolina. It was in force for 57 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 16, 2011, 1:33 PM EDT (17:33 UTC)
Expired
Apr 16, 2011, 2:30 PM EDT
In force
57 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

Counties Chesterfield County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC

The radar

The Columbia radar (KCAE), 105 km from the middle of the area, began a volume at 17:34 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
Apr 16, 1:52 PM EDTTSTM WND DMGCamden, SCPOWER LINES DOWN IN CAMDEN.
Apr 16, 2:10 PM EDTHAIL 1Patrick, SCQUARTER SIZE HAIL REPORTED BY PUBLIC.
Apr 16, 2:15 PM EDTTSTM WND DMGChesterfield, SCPOWER LINES DOWN AND OUTAGES IN CHESTERFIELD ON CHURCH, PELION, EDWARDS AND CONVERTS ROADS.

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
Apr 16, 5:57 AM EDTTornado WatchSPC8 hr
Apr 16, 12:02 PM EDTTornado Watch PDSSPC11 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 5.6 hours before the alert went out and 176 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, Charleston AFB, SC at 12:00Z on 2011-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 421 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2011-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
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.

743 
WUUS52 KCAE 161733
SVRCAE
SCC025-055-057-061-161830-
/O.NEW.KCAE.SV.W.0037.110416T1733Z-110416T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
133 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHEASTERN LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN LEE COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 230 PM EDT

* AT 130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
  MILES SOUTHWEST OF LUGOFF...OR 7 MILES NORTHEAST OF DENTSVILLE...
  AND MOVING NORTHEAST AT 40 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE CHESTERFIELD...
  PAGELAND...LUGOFF...KERSHAW...CHERAW AND CAMDEN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3454 7982 3449 7991 3450 7999 3449 8005
      3439 8026 3436 8028 3434 8024 3431 8024
      3409 8064 3407 8072 3410 8076 3447 8067
      3482 8038 3481 7993 3476 7992 3474 7989
      3469 7988 3459 7981
TIME...MOT...LOC 1733Z 356DEG 33KT 3412 8087

$$

SMITH
1 follow-up statement
162 
WWUS52 KCAE 161808
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
208 PM EDT SAT APR 16 2011

SCC057-161817-
/O.CAN.KCAE.SV.W.0037.000000T0000Z-110416T1830Z/
LANCASTER SC-
208 PM EDT SAT APR 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR LANCASTER COUNTY IS 
CANCELLED...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

LAT...LON 3454 7982 3449 7991 3450 7999 3449 8005
      3439 8026 3436 8028 3434 8024 3431 8024
      3419 8050 3444 8040 3481 8015 3481 7993
      3476 7992 3474 7989 3469 7988 3459 7981
TIME...MOT...LOC 1807Z 233DEG 42KT 3482 7998 3423 8032

$$

SCC025-055-061-161830-
/O.CON.KCAE.SV.W.0037.000000T0000Z-110416T1830Z/
CHESTERFIELD SC-KERSHAW SC-LEE SC-
208 PM EDT SAT APR 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR LEE...KERSHAW AND CHESTERFIELD COUNTIES...

AT 204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF
CHESTERFIELD TO 14 MILES SOUTH OF BETHUNE...OR ALONG A LINE EXTENDING
FROM 10 MILES NORTHWEST OF CHERAW TO 6 MILES WEST OF 
BISHOPVILLE...MOVING NORTHEAST AT 50 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SATURDAY EVENING
FOR CENTRAL SOUTH CAROLINA.

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

&&

LAT...LON 3454 7982 3449 7991 3450 7999 3449 8005
      3439 8026 3436 8028 3434 8024 3431 8024
      3419 8050 3444 8040 3481 8015 3481 7993
      3476 7992 3474 7989 3469 7988 3459 7981
TIME...MOT...LOC 1807Z 233DEG 42KT 3482 7998 3423 8032

$$

SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 12:05 AM EDTSpecial Weather StatementCAEMcCormick55 min
Apr 16, 1:03 PM EDTSevere Thunderstorm WarningCAEKershaw, Richland42 min
Apr 16, 1:26 PM EDTSevere Thunderstorm WarningCAECalhoun, Kershaw, Richland, Sumter49 min
Apr 16, 1:56 PM EDTTornado WarningCAEChesterfield19 min
Apr 16, 2:11 PM EDTSevere Thunderstorm WarningCAELee, Sumter49 min
Apr 16, 2:17 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Orangeburg, Richland, Sumter43 min
Apr 16, 2:48 PM EDTSevere Thunderstorm WarningCAECalhoun, Clarendon, Lee, Orangeburg, Sumter42 min
Apr 16, 3:12 PM EDTTornado WarningCAEClarendon33 min
Apr 16, 3:57 PM EDTSevere Thunderstorm WarningCAEClarendon, Orangeburg48 min
Apr 16, 4:12 PM EDTTornado WarningCAEClarendon33 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011Every 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.