Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 115, NWS Columbia, SC

August 20, 1999Burke County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Aug 20, 1999, 12:52 AM EDT for Burke County, Georgia. It was in force for 53 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: Aug 20, 1999, 12:52 AM EDT (04:52 UTC)
Expired: Aug 20, 1999, 1:45 AM EDT
In force: 53 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Burke County, GA

What was reported inside it

Time	Report	Where	Remark
Aug 20, 1:00 AM EDT	Thunderstorm Wind 50	Munnerlyn, GA	EPD reported trees 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

Charleston AFB, SC (KCHS), launched 00:00Z, 4.9 hours before the alert went out and 187 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

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

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, 11:35 PM EDT, 1 hour 17 minutes earlier.

Area forecast discussion, Aug 19, 11:35 PM EDT, 1 hour 17 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE COLUMBIA SC
1135 PM EDT THU AUG 19 1999

WL MAKE A QUICK UPDATE OF ZONES TO ADJUST TEMPS ESPECIALLY FOR
RAIN-COOLED AREAS. WINDS ALSO STAYING UP ACCORDING TO LATEST SFC
ANALYSIS SO WL ADJUST. STMS CONTINUING TO FIRE ACRS SRN MIDLANDS
ATTM BUT KEEP POPS AT 30 PCT FOR NOW. NO OTHER CHANGES PLANNED.

.CAE...NONE.

BC

In the hours before

Local storm report, Aug 19, 7:56 PM EDT, 4 hours 56 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, 9:01 PM EDT	Severe Thunderstorm Warning	CAE	Richland	29 min
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
Aug 20, 2:53 AM EDT	Severe Thunderstorm Warning	CAE	Burke	52 min
Aug 20, 5:40 PM EDT	Severe Thunderstorm Warning	CAE	Burke	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.