Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 53, NWS Charleston, SC

July 6, 2002Colleton County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Jul 6, 2002, 6:55 PM EDT for Colleton County, South Carolina. It was in force for 35 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: Jul 6, 2002, 6:55 PM EDT (22:55 UTC)
Expired: Jul 6, 2002, 7:30 PM EDT
In force: 35 min
Issued by: NWS Charleston, SC
Area: Whole counties

County Colleton County, SC

The radar

The Charleston,SC radar (KCLX), 42 km from the middle of the area, began a volume at 22:55 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 nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.9 hours before the alert went out and 61 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: 2209 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KCHS 062255
SVRCHS
SCC029-062330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...FOR DAMAGING WINDS
NATIONAL WEATHER SERVICE CHARLESTON SC
655 PM EDT SAT JUL 6 2002

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COLLETON COUNTY IN SOUTHERN SOUTH CAROLINA.

* UNTIL 730 PM EDT.

* AT 655 PM EDT...RADAR INDICATED AN EXTREMELY DANGEROUS SEVERE 
  THUNDERSTORM 5 MILES SOUTH OF ROUND O...OR ABOUT 8 MILES EAST 
  OF WALTERBORO...MOVING WEST AT 15 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  RITTER.
  WALTERBORO.
  NEYLES.
  HENDERSONVILLE.

THIS STORM HAS THE POTENTIAL TO PRODUCE DESTRUCTIVE WINDS AND
LARGE HAIL TO THE SIZE OF NICKELS. 

THIS IS A EXTREMELY DANGEROUS SEVERE THUNDERSTORM...TAKE COVER NOW 
SEVERE THUNDERSTORM WINDS CAN BE AS DESTRUCTIVE AS A TORNADO. ABANDON 
MOBILE HOMES AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. MOVE TO AN 
INTERIOR ROOM ON THE LOWEST FLOOR AND AVOID WINDOWS.

$$

LAT...LON 3278 8042 3297 8043 3298 8085 3276 8084

ST

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:59 AM EDT	Special Marine Warning	CHS		91 min
Jul 6, 2:32 AM EDT	Special Marine Warning	CHS		58 min
Jul 6, 3:50 AM EDT	Special Marine Warning	CHS		115 min
Jul 6, 5:52 AM EDT	Special Marine Warning	CHS		113 min
Jul 6, 4:23 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Hampton	52 min
Jul 6, 4:59 PM EDT	Severe Thunderstorm Warning	CHS	Allendale	31 min
Jul 6, 5:13 PM EDT	Severe Thunderstorm Warning	CHS	Hampton, Jasper	47 min
Jul 6, 6:16 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Dorchester	44 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.