Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 91, NWS Columbia, SC

December 17, 2001Lexington County, Richland County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Dec 17, 2001, 8:33 PM EST for Lexington County, Richland County, South Carolina. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Dec 17, 2001, 8:33 PM EST (01:33 UTC)
Expired: Dec 17, 2001, 9:15 PM EST
In force: 42 min
Issued by: NWS Columbia, SC
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Lexington County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 15 km from the middle of the area, began a volume at 01:33 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
Dec 17, 8:40 PM EST	Thunderstorm Wind 50 E	Irmo, SC	Sheriff reported a couple fo trees down in the Ridgemont subdivision of Irmo.

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 nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 1.6 hours before the alert went out and 165 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: 34 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 172 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.

823 
WUUS52 KCAE 180135
SVRCAE
SCC063-079-180215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
833 PM EST MON DEC 17 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
    WESTERN RICHLAND COUNTY IN CENTRAL SOUTH CAROLINA
    NORTHEASTERN LEXINGTON COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 915 PM EST.

* AT 823 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 7 MILES NORTH OF IRMO TO 6       
  MILES WEST OF LEXINGTON...MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF TH ESE STORMS INCLUDE...
    WEST COLUMBIA.
    SPRINGDALE.
    SOUTH CONGAREE.
    FOREST ACRES.
    DENTSVILLE.
    CAYCE.
    COLUMBIA.

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

LAT...LON 3422 8114 3395 8136 3387 8100 3413 8080

BLP

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 7:56 PM EST	Severe Thunderstorm Warning	CAE	Edgefield	49 min
Dec 17, 8:18 PM EST	Severe Thunderstorm Warning	CAE	Aiken, Lexington	27 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2001 Every severe thunderstorm warning in 2001

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.