Alert archive / South Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 177, NWS Columbia, SC

July 19, 1998Lancaster County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 19, 1998, 9:43 PM EDT for Lancaster County, South Carolina. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 19, 1998, 9:43 PM EDT (01:43 UTC)
Expired: Jul 19, 1998, 10:15 PM EDT
In force: 32 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 90 km from the middle of the area, began a volume at 01:45 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
Jul 19, 9:45 PM EDT	Thunderstorm Wind 65	Lancaster, SC	Sheriff reported numerous trees and powerlines down.

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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.7 hours before the alert went out and 171 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: 328 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 2202 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 28 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.

000 
TTAA00 KCAE 200145
SVRCAE
SCC057-200215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
943 PM EDT SUN JUL 19 1998

THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A

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

* UNTIL 1015 PM EDT

* AT 942 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM 5 MILES SOUTH OF FORT LAWN. THIS STORM 
  IS MOVING SOUTH AT 10 MPH.

THIS IS A DANGEROUS STORM...TAKE COVER IMMEDIATELY IF YOU ARE IN 
ITS PATH. INTENSE SEVERE THUNDERSTORMS CAN CAUSE AS MUCH DAMAGE 
AS SOME TORNADOES.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 19, 7:13 PM EDT, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
713 PM EDT SUN JUL 19 1998

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

655 PM     9 S WINNSBORO             SC   WIND DAMAGE
07/19/98   FAIRFIELD                      FAIRFIELD COUNTY SHERIFF
                                          REPORTED 2 TREES DOWN
                                          ALONG US 321 1 MILE NORTH
 Z                                         OF RICHLAND COUNTY LINE

BC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 10:00 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw	45 min
Jul 19, 10:26 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	34 min
Jul 19, 11:02 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland	43 min
Jul 19, 11:31 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland	59 min
Jul 19, 11:57 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Orangeburg	63 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1998 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.