Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 7, NWS Columbia, SC

February 28, 2011Chesterfield County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 28, 2011, 8:11 PM EST for Chesterfield County, South Carolina. It was in force for 23 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: Feb 28, 2011, 8:11 PM EST (01:11 UTC)
Expired: Feb 28, 2011, 8:34 PM EST
In force: 23 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

County Chesterfield County, SC

The radar

The Columbia radar (KCAE), 136 km from the middle of the area, began a volume at 01:13 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
Feb 28, 8:14 PM EST	HAIL 0.88	Cheraw, 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
Feb 28, 5:04 PM EST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.2 hours before the alert went out and 161 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -430 m²/s²
0-3 km storm-relative helicity: -326 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.

846 
WUUS52 KCAE 010111
SVRCAE
SCC025-010145-
/O.NEW.KCAE.SV.W.0007.110301T0111Z-110301T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
811 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 845 PM EST

* AT 809 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 18 MILES SOUTHWEST OF CHERAW...
  OR 10 MILES NORTH OF HARTSVILLE...AND MOVING EAST AT 55 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE CHERAW

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3460 7981 3454 7982 3449 7990 3450 7999
      3443 8017 3481 8001 3481 7993 3476 7992
      3474 7989 3469 7987 3466 7984 3466 7981
      3463 7979 3460 7979
TIME...MOT...LOC 0110Z 276DEG 52KT 3450 8008

$$

HC

1 follow-up statement

882 
WWUS52 KCAE 010134
SVSCAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
834 PM EST MON FEB 28 2011

SCC025-010144-
/O.CAN.KCAE.SV.W.0007.000000T0000Z-110301T0145Z/
CHESTERFIELD SC-
834 PM EST MON FEB 28 2011

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING 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 3460 7981 3454 7982 3449 7990 3450 7999
      3443 8017 3481 8001 3481 7993 3476 7992
      3474 7989 3469 7987 3466 7984 3466 7981
      3463 7979 3460 7979
TIME...MOT...LOC 0134Z 276DEG 52KT 3446 7966

$$

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 7:13 PM EST	Tornado Warning	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	47 min
Feb 28, 7:18 PM EST	Severe Thunderstorm Warning	CAE	Chesterfield, Kershaw, Lancaster	57 min
Feb 28, 7:24 PM EST	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	29 min
Feb 28, 7:28 PM EST	Severe Thunderstorm Warning	CAE	Aiken, Chesterfield, Fairfield, Kershaw, Lancaster, Lexington and 3 more	62 min
Feb 28, 8:49 PM EST	Severe Thunderstorm Warning	CAE	Clarendon, Lee, Sumter	29 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.