Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 121, NWS Columbia, SC

November 11, 2002Sumter County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Nov 11, 2002, 8:49 AM EST for Sumter County, South Carolina. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 11, 2002, 8:49 AM EST (13:49 UTC)
Expired: Nov 11, 2002, 9:45 AM EST
In force: 56 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Sumter County, SC

The radar

The Columbia radar (KCAE), 68 km from the middle of the area, began a volume at 13:50 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
Nov 11, 5:40 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 1.8 hours before the alert went out and 118 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: 1057 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KCAE 111349
SVRCAE
SCC085-111445-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 945 AM EST.

* AT 845 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 8 MILES NORTHEAST OF OAKLAND TO
  CHERRYVALE..MOVING EAST NORTHEAST AT 40 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF TH ESE STORMS INCLUDE...
    SUMTER.
    MILLWOOD.
    MULBERRY.

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.

JL/GL

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, 7:07 AM EST	Severe Thunderstorm Warning	CAE	Lancaster	38 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, 8:53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.