Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 85, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Aug 14, 1999, 4:27 PM EDT for Darlington County, Florence County, South Carolina. It was in force for 48 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
- Aug 14, 1999, 4:27 PM EDT (20:27 UTC)
- Expired
- Aug 14, 1999, 5:15 PM EDT
- In force
- 48 min
- Issued by
- NWS Wilmington, NC
- Area
- Whole counties
Counties Darlington County, SC, Florence County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 14, 4:35 PM EDT | Thunderstorm Wind 60 | Hartsville, SC | A 50 foot tree was downed at the Sonoco plant. |
| Aug 14, 4:40 PM EDT | Thunderstorm Wind 75 | Florence, SC | Thunderstorm wind and lightning were the cause of downed trees causing a power outage to 2500 customers. |
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
Newport, NC (KMHX), launched 12:00Z, 8.5 hours before the alert went out and 279 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
- 708 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 34 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 14, 4:39 PM EDT | Severe Thunderstorm Warning | ILM | Robeson | 66 min |
| Aug 14, 5:02 PM EDT | Severe Thunderstorm Warning | ILM | Dillon | 43 min |
| Aug 14, 5:12 PM EDT | Severe Thunderstorm Warning | ILM | Florence | 33 min |
| Aug 14, 5:25 PM EDT | Severe Thunderstorm Warning | ILM | Marion | 50 min |
| Aug 14, 6:00 PM EDT | Severe Thunderstorm Warning | ILM | Horry | 45 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.