Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 172, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Sep 27, 2018, 8:34 PM EDT for Lee County, Sumter County, South Carolina. It was in force for 26 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
- Sep 27, 2018, 8:34 PM EDT (00:34 UTC)
- Expired
- Sep 27, 2018, 9:00 PM EDT
- In force
- 26 min
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Lee County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 74 km from the middle of the area, began a volume at 00:34 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.6 hours before the alert went out and 230 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
- 733 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 371 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.1
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 8:01 PM EDT | Special Weather Statement | CAE | Lee, Sumter | 59 min |
| Sep 27, 8:07 PM EDT | Severe Thunderstorm Warning | CAE | Aiken, Edgefield, Lexington, Saluda | 38 min |
| Sep 27, 8:59 PM EDT | Special Weather Statement | CAE | Barnwell, Lexington, Richland | 61 min |
| Sep 27, 9:10 PM EDT | Special Weather Statement | CAE | Kershaw, Lancaster | 65 min |
| Sep 27, 9:54 PM EDT | Special Weather Statement | CAE | Bamberg, Calhoun, Orangeburg, Richland | 66 min |
| Sep 27, 10:08 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lee, Richland, Sumter | 52 min |
| Sep 27, 10:55 PM EDT | Special Weather Statement | CAE | Chesterfield | 20 min |
| Sep 27, 11:16 PM EDT | Special Weather Statement | CAE | Clarendon, Lee | 29 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2018Every severe thunderstorm warning in 2018
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.