Alert archive / South Carolina / Tornado Warnings in 1999

Tornado Warning 2, NWS Charleston, SC

April 8, 1999Colleton County, South Carolina

NWS Charleston, SC issued this tornado warning at Apr 8, 1999, 8:04 PM EDT for Colleton County, South Carolina. It was in force for 46 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
Apr 8, 1999, 8:04 PM EDT (00:04 UTC)
Expired
Apr 8, 1999, 8:50 PM EDT
In force
46 min
Issued by
NWS Charleston, SC
Area
Whole counties

County Colleton County, SC

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 0.1 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-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 1999-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2156 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 1999-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2156 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1332 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KCHS 090005 RRA
TORCHS
SCC029-090050-

BULLETIN...EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
804 PM EDT THU APR 8 1999

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  COLLETON COUNTY IN SOUTH CAROLINA

* UNTIL 850 PM EDT

* AT 800 PM EDT... AREA LAW ENFORCEMENT INDICATED A SEVERE
  THUNDERSTORM WITH A TORNADO IN EASTERN ALLENDALE COUNTY...
  MOVING SOUTHEAST AT 40 MPH.

* THE STORM IS EXPECTED TO BE NEAR...
  NORTHWESTERN PORTIONS OF COLLETON COUNTY NEAR ISLANDTON.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

DG/EVT


&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 8:56 PM EDTSevere Thunderstorm WarningCHSCharleston, Dorchester64 min
Apr 8, 9:13 PM EDTTornado WarningCHSCharleston32 min

Nearby

Tornado Warnings in South Carolina, 1999Every tornado warning in 1999Tornadoes in 1999

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.