Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 93, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Aug 19, 1999, 2:58 PM EDT for Horry County, South Carolina. It was in force for 47 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, 2:58 PM EDT (18:58 UTC)
- Expired
- Aug 19, 1999, 3:45 PM EDT
- In force
- 47 min
- Issued by
- NWS Wilmington, NC
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Horry County, SC
The radar
The Wilmington radar (KLTX), 51 km from the middle of the area, began a volume at 18:58 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 12:00Z, 7.0 hours before the alert went out and 147 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.
- Mixed-layer CAPE
- 2996 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 2:54 PM EDT | Severe Thunderstorm Warning | ILM | Brunswick, Columbus | 51 min |
| Aug 19, 3:44 PM EDT | Severe Thunderstorm Warning | ILM | New Hanover, Pender | 46 min |
| Aug 19, 3:45 PM EDT | Severe Thunderstorm Warning | ILM | Columbus | 30 min |
| Aug 19, 4:15 PM EDT | Severe Thunderstorm Warning | ILM | Columbus | 30 min |
| Aug 19, 2:35 PM EDT | Severe Thunderstorm Warning | ILM | Florence | 40 min |
| Aug 19, 3:32 PM EDT | Severe Thunderstorm Warning | ILM | Florence | 28 min |
| Aug 19, 3:47 PM EDT | Severe Thunderstorm Warning | ILM | Georgetown, Horry | 28 min |
| Aug 19, 4:44 PM EDT | Severe Thunderstorm Warning | ILM | Horry | 61 min |
| Aug 19, 6:04 PM EDT | Severe Thunderstorm Warning | ILM | Williamsburg | 46 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 1999Every 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.