Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 23, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Apr 18, 2012, 4:47 PM EDT for Florence County, Williamsburg County, South Carolina. It was in force for 43 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
- Apr 18, 2012, 4:47 PM EDT (20:47 UTC)
- Expired
- Apr 18, 2012, 5:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Wilmington, NC
- Area
- Storm-based polygon
Counties Florence County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 120 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 106 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
- 119 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 777 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Wilmington, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 17, 7:50 PM EDT, 20 hours 57 minutes earlier.
Area forecast discussion, Apr 17, 7:50 PM EDT, 20 hours 57 minutes before
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</html>The office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 2:51 PM EDT | Special Weather Statement | ILM | Darlington | 54 min |
| Apr 18, 3:46 PM EDT | Special Weather Statement | ILM | Darlington, Marlboro | 59 min |
| Apr 18, 4:03 PM EDT | Special Weather Statement | ILM | Florence | 57 min |
| Apr 18, 4:24 PM EDT | Special Weather Statement | ILM | Florence, Williamsburg | 66 min |
| Apr 18, 5:24 PM EDT | Special Weather Statement | ILM | Williamsburg | 66 min |
| Apr 18, 5:30 PM EDT | Special Weather Statement | ILM | Marion | 60 min |
| Apr 18, 6:42 PM EDT | Special Weather Statement | ILM | Georgetown | 63 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2012Every severe thunderstorm warning in 2012
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.