Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 112, NWS Columbia, SC

August 19, 1999Richland County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 19, 1999, 9:01 PM EDT for Richland County, South Carolina. It was in force for 29 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: Aug 19, 1999, 9:01 PM EDT (01:01 UTC)
Expired: Aug 19, 1999, 9:30 PM EDT
In force: 29 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Richland County, SC

The radar

The Columbia radar (KCAE), 21 km from the middle of the area, began a volume at 01:02 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 00:00Z, 1.0 hours before the alert went out and 150 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: 2982 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 935 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 50 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 200102 RRA
SVRCAE
SCC079-200130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
901 PM EDT THU AUG 19 1999

THE NATIONAL WEATHER SERVICE IN COLUMBIA SC HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN RICHLAND COUNTY IN SOUTH CAROLINA

* UNTIL 930 PM EDT 

* AT 858 PM EDT WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE 
  THUNDERSTORM JUST NORTH OF EASTOVER AT THE INTERSECTION OF 
  US HWY 378 AND US HWY 601. THIS STORM IS MOVING NORTHEAST 
  AT 5 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.

SEVERE THUNDERSTORMS PRODUCE >DAMAGING WIND IN EXCESS OF 55 MPH... 
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR 
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. 

BC/RJL

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.

NWS Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 7:50 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 19, 7:50 PM EDT, 1 hour 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
750 PM EDT THU AUG 19 1999

SVR ACTIVITY FINALLY DIMINISHING ACRS CWA THIS EVENING. LAST OF SVR STMS
NOW OVR ERN ORANGEBURG WL EXIT CWA SHORTLY. WL SOON DO A QUICK UPDATE TO
TAKE CWA COUNTIES OUT OF SVR TSTM WATCH BOX THAT WAS SET TO EXPIRE AT 9
PM. MAY REDUCE OVRNITE POPS TO ARND 30 PCT FOR ALL ZONES. WL TAKE A LUK
AT TEMP TREND TO SEE IF THERE IS A NEED TO TWEAK OVRNITE LOWS. OTHERWISE
NO MAJOR CHANGES PLANNED.

.CAE...NONE.

BC

In the hours before

Local storm report, Aug 19, 4:54 PM EDT, 4 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
454 PM EDT THU AUG 19 1999

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

400 PM     30 SE CAE                 SC   WIND DAMAGE
08/19/99   CALHOUN                        SHERIFF OFFICE REPORTED
                                          TREES DOWN IN ST MATTHEWS
                                          AREA

RJL

Local storm report, Aug 19, 5:16 PM EDT, 3 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
516 PM EDT THU AUG 19 1999

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

310 PM     30 E AGS                  SC   WIND DAMAGE
08/19/99   AIKEN                          SHERIFF OFFICE REPORTED
                                          TREES DOWN BETWEEN
                                          SPRINGFIELD AND KITCHINGS
                                          MILL

420 PM     10 ESE AGS                SC   WIND DAMAGE
08/19/99   AIKEN                          SHERIFF OFFICE REPORTED
                                          TREES DOWN IN JACKSON AREA

RJL

Local storm report, Aug 19, 5:32 PM EDT, 3 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
532 PM EDT THU AUG 19 1999

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

505 PM     33 SSE COLUMBIA           SC   WIND DAMAGE
08/19/99   ORANGEBURG                     ORANGEBURG EMA REPORTED
                                          TREES DOWN IN CITY OF
                                          ORANGEBURG

RJL

Local storm report, Aug 19, 5:54 PM EDT, 3 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
554 PM EDT THU AUG 19 1999

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

450 PM     18 S AGS                  GA   WIND DAMAGE
08/19/99   BURKE                          BURKE EMA REPORTED TREES
                                          DOWN IN WAYNESBORO AREA

RJL

Local storm report, Aug 19, 7:56 PM EDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
756 PM EDT THU AUG 19 1999

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

645 PM     27 SSE OGB                SC   WIND DAMAGE
08/19/99   BAMBERG                        BAMBERG DISPATCH HAD
                                          NUMEROUS REPORTS OF TREES
                                          DOWN IN EHRHARDT AREA

715 PM     27 SSE OGB                SC   WIND DAMAGE
08/19/99   BAMBERG                        BAMBERG DISPATCH REPORTED
                                          TREES DOWN IN EHRHARDT
                                          AREA

RJL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 10:12 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg	33 min
Aug 19, 10:17 PM EDT	Severe Thunderstorm Warning	CAE	Orangeburg	43 min
Aug 19, 10:38 PM EDT	Tornado Warning	CAE	Bamberg	37 min
Aug 19, 11:42 PM EDT	Tornado Warning	CAE	Barnwell	33 min
Aug 20, 6:15 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	60 min
Aug 20, 7:16 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	29 min
Aug 20, 7:38 PM EDT	Tornado Warning	CAE	Newberry	37 min
Aug 20, 7:55 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland	50 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1999 Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.