Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 67, NWS Columbia, SC

May 23, 1999Richland County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 23, 1999, 5:54 PM EDT for Richland County, South Carolina. It was in force for 36 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: May 23, 1999, 5:54 PM EDT (21:54 UTC)
Expired: May 23, 1999, 6:30 PM EDT
In force: 36 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Richland County, SC

What was reported inside it

Time	Report	Where	Remark
May 23, 6:10 PM EDT	Thunderstorm Wind 50	Ft Jackson, SC	Officials reported some trees down on Ft Jackson.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 23, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 341 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: 299 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1083 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -42 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.

In the hours before

Local storm report, May 23, 5:29 PM EDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
529 PM EDT SUN MAY 23 1999

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

520 PM     APPLING                   GA   .75 INCH HAIL
05/23/99   COLUMBIA                       SPOTTER REPORT FROM
                                          CENTRAL COLUMBIA CO

530 PM     MARTINEZ                  GA   .88 INCH HAIL
05/23/99   COLUMBIA                       COLUMBIA COUNTY EMERGENCY
                                          MANAGER REPORT AT MARTINEZ

TTH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 6:01 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	44 min
May 23, 6:14 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Sumter	31 min
May 23, 5:36 PM EDT	Severe Thunderstorm Warning	CAE	Columbia	24 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.