Alert archive / South Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

December 20, 2017Lexington County, Richland County, Saluda County, South Carolina

NWS Columbia, SC issued this special weather statement at Dec 20, 2017, 1:28 PM EST for Lexington County, Richland County, Saluda County, South Carolina. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 20, 2017, 1:28 PM EST (18:28 UTC)
Expired: Dec 20, 2017, 2:30 PM EST
In force: 62 min
Issued by: NWS Columbia, SC

Counties Lexington County, SC, Richland County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 13 km from the middle of the area, began a volume at 18:30 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.5 hours before the alert went out and 331 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 11 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 242 m²/s²
0-3 km storm-relative helicity: 276 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 20, 12:58 PM EST	Special Weather Statement	CAE	Edgefield, McCormick, Saluda	62 min
Dec 20, 1:56 PM EST	Special Weather Statement	CAE	Aiken	64 min
Dec 20, 2:28 PM EST	Special Weather Statement	CAE	Calhoun, Orangeburg	62 min

Nearby

Special Weather Statements in South Carolina, 2017 Every special weather statement 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.