Alert archive / South Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 159, NWS Greenville-Spartanburg, SC

June 25, 2020Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 25, 2020, 4:59 PM EDT for Spartanburg County, South Carolina. It was in force for 31 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: Jun 25, 2020, 4:59 PM EDT (20:59 UTC)
Expired: Jun 25, 2020, 5:30 PM EDT
In force: 31 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Spartanburg County, SC

The radar

The Greer radar (KGSP), 22 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 289 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: 3 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 25, 1:27 PM EDT	Special Weather Statement	GSP	Burke	48 min
Jun 25, 2:03 PM EDT	Special Weather Statement	GSP	Lincoln	42 min
Jun 25, 3:13 PM EDT	Severe Thunderstorm Warning	GSP	Gaston, Mecklenburg	32 min
Jun 25, 2:46 PM EDT	Special Weather Statement	GSP	Union	44 min
Jun 25, 3:28 PM EDT	Special Weather Statement	GSP	Chester	47 min
Jun 25, 3:58 PM EDT	Special Weather Statement	GSP	York	32 min
Jun 25, 4:16 PM EDT	Special Weather Statement	GSP	Spartanburg	29 min
Jun 25, 4:48 PM EDT	Special Weather Statement	GSP	Spartanburg	27 min
Jun 25, 5:26 PM EDT	Special Weather Statement	GSP	Union	34 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2020 Every 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.