Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 1, NWS Columbia, SC

February 28, 2011Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 28, 2011, 6:19 PM EST for Lancaster County, South Carolina. It was in force for 56 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, 6:19 PM EST (23:19 UTC)
Expired: Feb 28, 2011, 7:15 PM EST
In force: 56 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 101 km from the middle of the area, began a volume at 23:23 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, 7:10 PM EST	TSTM WND DMG	2 Ese Springdell, SC	TREES DOWN AT RIVERSIDE RD AND PORTER RANCH RD

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 12:00Z, 11.3 hours before the alert went out and 162 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: 948 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 425 m²/s²
0-3 km storm-relative helicity: 499 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.

252 
WUUS52 KCAE 282319
SVRCAE
SCC057-010015-
/O.NEW.KCAE.SV.W.0001.110228T2319Z-110301T0015Z/

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

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 715 PM EST

* AT 618 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 32 MILES NORTHWEST OF IRWIN...OR
  9 MILES SOUTHWEST OF YORK...AND MOVING EAST AT 60 MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE LANCASTER...IRWIN AND
  ELGIN

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 3494 8078 3482 8079 3482 8057 3477 8052
      3469 8047 3455 8087 3465 8090 3470 8087
      3475 8089 3479 8088 3482 8090 3484 8087
      3490 8088 3493 8087 3501 8091 3506 8090
TIME...MOT...LOC 2318Z 271DEG 51KT 3489 8123

$$

SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 8:25 PM EST	Lake Wind Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	40 hr
Feb 28, 6:28 PM EST	Severe Thunderstorm Warning	CAE	McCormick	62 min
Feb 28, 6:45 PM EST	Severe Thunderstorm Warning	CAE	Fairfield, Lancaster, Lexington, Newberry, Saluda	45 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.