Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 111, NWS Columbia, SC

November 11, 2002Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Nov 11, 2002, 7:07 AM EST for Lancaster County, South Carolina. It was in force for 38 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: Nov 11, 2002, 7:07 AM EST (12:07 UTC)
Expired: Nov 11, 2002, 7:45 AM EST
In force: 38 min
Issued by: NWS Columbia, SC
Area: Counties, with a storm outline in the text

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 118 km from the middle of the area, began a volume at 12:10 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
Nov 11, 7:22 AM EST	Thunderstorm Wind 50 E	Van Wyck, SC	Sheriff reported some trees down around the Van Wyck area.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 11, 3:30 AM EST	Tornado Watch	SPC	6 hr
Nov 11, 5:40 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 0.1 hours before the alert went out and 149 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: 1142 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 535 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 235 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

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

219 
WUUS52 KCAE 111207
SVRCAE
SCC057-111245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
706 AM EST MON NOV 11 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 745 AM EST.

* AT 704 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER YORK COUNTY..MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  VANWICK
  HANCOCK

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. REMEMBER...SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED
WARNING.

THIS STORM WILL PRODUCE DAMAGING WINDS IN EXCESS OF 55 MPH.

LAT...LON 3495 8105 3483 8090 3483 8067 3538 8061

JB/CDL

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 11, 5:27 AM EST	Tornado Warning	CAE	McCormick	33 min
Nov 11, 6:11 AM EST	Tornado Warning	CAE	McCormick	49 min
Nov 11, 6:36 AM EST	Tornado Warning	CAE	Newberry	54 min
Nov 11, 7:05 AM EST	Severe Thunderstorm Warning	CAE	Edgefield	55 min
Nov 11, 7:12 AM EST	Tornado Warning	CAE	Saluda	48 min
Nov 11, 7:20 AM EST	Severe Thunderstorm Warning	CAE	Fairfield	40 min
Nov 11, 7:26 AM EST	Tornado Warning	CAE	Newberry	64 min
Nov 11, 7:26 AM EST	Tornado Warning	CAE	Newberry	64 min
Nov 11, 7:37 AM EST	Severe Thunderstorm Warning	CAE	Lexington	53 min
Nov 11, 7:50 AM EST	Severe Thunderstorm Warning	CAE	Richland	55 min
Nov 11, 7:59 AM EST	Severe Thunderstorm Warning	CAE	Lancaster	46 min
Nov 11, 8:03 AM EST	Severe Thunderstorm Warning	CAE	Fairfield	27 min
Nov 11, 8:07 AM EST	Severe Thunderstorm Warning	CAE	Fairfield	23 min
Nov 11, 8:14 AM EST	Severe Thunderstorm Warning	CAE	Kershaw	46 min
Nov 11, 8:26 AM EST	Severe Thunderstorm Warning	CAE	Chesterfield	64 min
Nov 11, 8:49 AM EST	Severe Thunderstorm Warning	CAE	Sumter	56 min
Nov 11, 8:53 AM EST	Severe Thunderstorm Warning	CAE	Lee	52 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.