Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 71, NWS Columbia, SC

April 28, 20116 counties in South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Apr 28, 2011, 11:16 AM EDT for 6 counties in South Carolina. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 28, 2011, 11:16 AM EDT (15:16 UTC)
Expired: Apr 28, 2011, 12:00 PM EDT
In force: 44 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Chesterfield County, SC, Fairfield County, SC, Kershaw County, SC, Lee County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 87 km from the middle of the area, began a volume at 15:17 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.

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, 3.3 hours before the alert went out and 164 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.

969 
WUUS52 KCAE 281516
SVRCAE
SCC025-039-055-061-079-085-281600-
/O.NEW.KCAE.SV.W.0071.110428T1516Z-110428T1600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1116 AM EDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  SOUTHERN FAIRFIELD COUNTY IN CENTRAL SOUTH CAROLINA
  KERSHAW COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHERN LEE COUNTY IN CENTRAL SOUTH CAROLINA
  RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
  NORTHWESTERN SUMTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL NOON EDT

* AT 1116 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR FORT JACKSON...OR NEAR
  WOODFIELDS...AND MOVING NORTHEAST AT 65 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE FORT JACKSON...
  WOODFIELDS...LUGOFF...FOREST ACRES...DENTSVILLE...CAMDEN...
  BISHOPVILLE AND ARCADIA LAKES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 NOON EDT THURSDAY FOR EAST
CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3448 8006 3437 8028 3431 8024 3434 8020
      3436 8020 3436 8017 3433 8018 3422 8011
      3420 8011 3417 8014 3387 8092 3421 8115
      3450 8058 3450 8053 3452 8052 3470 8017
      3449 8001
TIME...MOT...LOC 1516Z 237DEG 58KT 3406 8085

$$

AWP

1 follow-up statement

137 
WWUS52 KCAE 281545
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
1145 AM EDT THU APR 28 2011

SCC039-061-079-085-281554-
/O.CAN.KCAE.SV.W.0071.000000T0000Z-110428T1600Z/
FAIRFIELD SC-LEE SC-RICHLAND SC-SUMTER SC-
1145 AM EDT THU APR 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SUMTER...RICHLAND...LEE AND
FAIRFIELD COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON EDT THURSDAY FOR EAST
CENTRAL GEORGIA AND 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 3448 8006 3434 8033 3434 8036 3431 8036
      3429 8042 3427 8043 3423 8053 3445 8068
      3449 8060 3449 8058 3450 8053 3453 8051
      3470 8017 3449 8001
TIME...MOT...LOC 1544Z 237DEG 58KT 3429 8038

$$

SCC025-055-281600-
/O.CON.KCAE.SV.W.0071.000000T0000Z-110428T1600Z/
CHESTERFIELD SC-KERSHAW SC-
1145 AM EDT THU APR 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
KERSHAW AND CHESTERFIELD COUNTIES...

AT 1144 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES SOUTH OF BETHUNE...
OR 10 MILES NORTHWEST OF BISHOPVILLE...MOVING NORTHEAST AT 65 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MCBEE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON EDT THURSDAY FOR EAST
CENTRAL GEORGIA AND 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 3448 8006 3434 8033 3434 8036 3431 8036
      3429 8042 3427 8043 3423 8053 3445 8068
      3449 8060 3449 8058 3450 8053 3453 8051
      3470 8017 3449 8001
TIME...MOT...LOC 1544Z 237DEG 58KT 3429 8038

$$

AWP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 2:28 AM EDT	Severe Thunderstorm Warning	CAE	McCormick	47 min
Apr 28, 2:57 AM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	48 min
Apr 28, 3:24 AM EDT	Severe Thunderstorm Warning	CAE	Newberry, Saluda	51 min
Apr 28, 3:48 AM EDT	Severe Thunderstorm Warning	CAE	McCormick	42 min
Apr 28, 4:15 AM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	45 min
Apr 28, 4:26 AM EDT	Severe Thunderstorm Warning	CAE	McCormick	34 min
Apr 28, 4:50 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, Lexington, Saluda	40 min
Apr 28, 4:56 AM EDT	Severe Thunderstorm Warning	CAE	McCormick	49 min
Apr 28, 5:03 AM EDT	Severe Thunderstorm Warning	CAE	Edgefield	42 min
Apr 28, 5:17 AM EDT	Severe Thunderstorm Warning	CAE	Aiken	43 min
Apr 28, 5:24 AM EDT	Areal Flood Advisory	CAE	Edgefield, McCormick	3 hr
Apr 28, 5:31 AM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland	44 min
Apr 28, 5:41 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, Saluda	49 min
Apr 28, 5:57 AM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland	48 min
Apr 28, 6:12 AM EDT	Severe Thunderstorm Warning	CAE	Aiken	48 min
Apr 28, 6:28 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Calhoun, Lexington, Orangeburg, Richland	47 min
Apr 28, 6:40 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Bamberg, Barnwell, Orangeburg	65 min
Apr 28, 6:54 AM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Richland, Sumter	66 min
Apr 28, 7:08 AM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell	52 min
Apr 28, 7:16 AM EDT	Severe Thunderstorm Warning	CAE	Chesterfield	44 min
Apr 28, 7:20 AM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Lee, Orangeburg, Richland, Sumter	55 min
Apr 28, 7:30 AM EDT	Tornado Warning	CAE	Calhoun, Clarendon, Richland, Sumter	45 min
Apr 28, 7:49 AM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Calhoun, Clarendon, Orangeburg	56 min
Apr 28, 8:05 AM EDT	Tornado Warning	CAE	Lee, Sumter	25 min
Apr 28, 8:16 AM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Lee, Orangeburg, Richland, Sumter	59 min
Apr 28, 8:45 AM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Clarendon, Orangeburg	60 min
Apr 28, 9:22 AM EDT	Severe Thunderstorm Warning	CAE	Clarendon, Lee, Orangeburg, Sumter	53 min
Apr 28, 10:59 AM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Orangeburg, Richland	31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.