Alert archive / South Carolina / Tornado Watches in 1998

Tornado Watch 198

April 9, 1998Screven County, Georgia; 6 counties in North Carolina; 28 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Apr 9, 1998, 4:00 AM EDT for Screven County, Georgia; 6 counties in North Carolina; 28 counties in South Carolina. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 9, 1998, 4:00 AM EDT (08:00 UTC)
Expired
Apr 9, 1998, 10:00 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 35 counties

Screven County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Robeson County, NC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC

Warnings issued inside it

3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 9, 6:58 AM EDTTornado WarningILMGeorgetown, Williamsburg47 min
Apr 9, 7:15 AM EDTTornado WarningILMHorry30 min
Apr 9, 8:15 AM EDTSevere Thunderstorm WarningILMBrunswick, New Hanover35 min

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 8.0 hours before the alert went out and 107 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 1998-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
942 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
320 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 8, 8:30 PM EDTTornado WatchSPCChattooga, Dade, Walker7 hr
Apr 9, 1:15 AM EDTTornado WatchSPCBaldwin, Banks, Barrow, Bartow, Bibb, Burke and 78 more6 hr
Apr 9, 2:30 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 60 more5 hr
Apr 9, 7:00 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 30 more6 hr
Apr 9, 1:45 PM EDTTornado WatchSPCAlamance, Bertie, Camden, Caswell, Chatham, Chowan and 23 more6 hr
Apr 8, 10:00 PM EDTSevere Thunderstorm WatchSPCAllendale, Bamberg, Barnwell, Berkeley, Calhoun, Charleston and 19 more6 hr

Nearby

Tornado Watches in South Carolina, 1998Tornado Watches in North Carolina, 1998Tornado Watches in Georgia, 1998Every tornado watch in 1998

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.