Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 134, NWS Columbia, SC
NWS Columbia, SC issued this severe thunderstorm warning at Jul 8, 2017, 8:55 PM EDT for Clarendon County, Sumter County, South Carolina. It was in force for 24 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
- Jul 8, 2017, 8:55 PM EDT (00:55 UTC)
- Expired
- Jul 8, 2017, 9:19 PM EDT
- In force
- 24 min
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Clarendon County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 78 km from the middle of the area, began a volume at 00:57 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 00:00Z, 0.9 hours before the alert went out and 103 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
- 2157 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1209 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.8
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.
In the hours before
Local storm report, Jul 8, 8:03 PM EDT, 52 minutes before
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</html>The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 8:52 PM EDT | Areal Flood Advisory | CAE | Bamberg, Barnwell, Calhoun, Clarendon, Orangeburg | 113 min |
| Jul 8, 9:16 PM EDT | Special Weather Statement | CAE | Dorchester | 29 min |
| Jul 8, 9:22 PM EDT | Special Weather Statement | CAE | Aiken | 23 min |
| Jul 9, 5:29 PM EDT | Severe Thunderstorm Warning | CAE | Bamberg | 46 min |
| Jul 9, 5:43 PM EDT | Special Weather Statement | CAE | Aiken | 32 min |
| Jul 9, 6:26 PM EDT | Special Weather Statement | CAE | Orangeburg | 34 min |
| Jul 9, 7:14 PM EDT | Special Weather Statement | CAE | Calhoun | 31 min |
| Jul 9, 3:51 PM EDT | Areal Flood Advisory | CAE | Burke, Richmond | 114 min |
| Jul 9, 4:42 PM EDT | Areal Flood Advisory | CAE | Richmond | 2 hr |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2017Every severe thunderstorm warning in 2017
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.