Alert archive / South Carolina / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 12, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Feb 13, 2020, 1:45 PM EST for Florence County, Marion County, Williamsburg County, South Carolina. It was in force for 30 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
- Feb 13, 2020, 1:45 PM EST (18:45 UTC)
- Expired
- Feb 13, 2020, 2:15 PM EST
- In force
- 30 min
- Issued by
- NWS Wilmington, NC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Florence County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 108 km from the middle of the area, began a volume at 18:45 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, 6.8 hours before the alert went out and 118 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
- 29 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 758 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 250 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 10:11 PM EST | Dense Fog Advisory | ILM | Brunswick, New Hanover, Pender | 13 hr |
| Feb 13, 12:30 PM EST | Special Weather Statement | ILM | Robeson | 60 min |
| Feb 13, 1:30 PM EST | Special Weather Statement | ILM | Bladen, Robeson | 60 min |
| Feb 13, 3:00 PM EST | Special Weather Statement | ILM | Brunswick, Columbus | 60 min |
| Feb 13, 9:59 AM EST | River Flood Warning | ILM | Horry | 21 days |
| Feb 13, 11:30 AM EST | Special Weather Statement | ILM | Darlington, Marlboro | 60 min |
| Feb 13, 12:57 PM EST | Severe Thunderstorm Warning | ILM | Darlington, Florence | 48 min |
| Feb 13, 2:15 PM EST | Special Weather Statement | ILM | Marion | 45 min |
| Feb 13, 2:20 PM EST | Special Weather Statement | ILM | Horry, Williamsburg | 40 min |
| Feb 13, 3:11 PM EST | Special Weather Statement | ILM | Georgetown | 64 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2020Every severe thunderstorm warning in 2020
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.