Alert archive / South Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 182, NWS Columbia, SC

July 19, 1998Aiken County, Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 19, 1998, 11:57 PM EDT for Aiken County, Orangeburg County, South Carolina. It was in force for 63 min. 2 reports 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, 11:57 PM EDT (03:57 UTC)
Expired: Jul 20, 1998, 1:00 AM EDT
In force: 63 min
Issued by: NWS Columbia, SC
Area: Whole counties

Counties Aiken County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 52 km from the middle of the area, began a volume at 04:00 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 20, 12:25 AM EDT	Thunderstorm Wind 50	Orangeburg, SC	Sheriff reported a couple of trees down on highway 400.
Jul 20, 12:50 AM EDT	Thunderstorm Wind 60	Aiken, SC	Newspaper reported trees down on homes and power outages.

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

Charleston AFB, SC (KCHS), launched 00:00Z, 4.0 hours before the alert went out and 131 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: 3426 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 642 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 63 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 200357
SVRCAE
SCC003-075-200500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
1157 PM EDT SUN JUL 19 1998

THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN AIKEN COUNTY IN SOUTH CAROLINA
  WESTERN ORANGEBURG COUNTY IN SOUTH CAROLINA

* UNTIL 100 AM EDT 

* AT 1156 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A SEVERE THUNDERSTORM 10 MILES NORTHEAST OF PERRY. THE STORM 
  WAS MOVING TOWARD THE SOUTH-SOUTHWEST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PERRY AT 1230 AM EDT
  SALLEY AT 1241 AM EDT
  NORTH AT 1235 AM EDT
  NEESES AT 1245 AM EDT

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.

RCC

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, 4 hours 44 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

Local storm report, Jul 19, 10:14 PM EDT, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
1014 PM EDT SUN JUL 19 1998

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

945 PM     8 SSW LANCASTER           SC   WIND DAMAGE
07/19/98   LANCASTER                      LANCASTER COUNTY SHERIFF
                                          REPORTS NUMEROUS TREES AND
                                          POWER LINES DOWN

BC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 9:43 PM EDT	Severe Thunderstorm Warning	CAE	Lancaster	32 min
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

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.