Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 335, NWS Greenville-Spartanburg, SC

September 10, 2018Anderson County, Oconee County, South Carolina; Hart County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 10, 2018, 3:14 PM EDT for Anderson County, Oconee County, South Carolina; Hart County, Georgia. It was in force for 29 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 10, 2018, 3:14 PM EDT (19:14 UTC)
Expired: Sep 10, 2018, 3:43 PM EDT
In force: 29 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hart County, GA, Anderson County, SC, Oconee County, SC

The radar

The Greer radar (KGSP), 72 km from the middle of the area, began a volume at 19:15 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 12:00Z, 7.2 hours before the alert went out and 321 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: 35 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 475 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 9, 7:53 PM EDT, 19 hours 21 minutes earlier.

Area forecast discussion, Sep 9, 7:53 PM EDT, 19 hours 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 8:03 PM EDT	Special Weather Statement	GSP	Graham	42 min
Sep 9, 8:41 PM EDT	Special Weather Statement	GSP	Graham, Swain	49 min
Sep 9, 9:36 PM EDT	Special Weather Statement	GSP	Burke, McDowell, Rutherford	39 min
Sep 9, 11:12 PM EDT	Special Weather Statement	GSP	Graham, Swain	63 min
Sep 9, 11:54 PM EDT	Special Weather Statement	GSP	Polk, Rutherford	36 min
Sep 9, 11:56 PM EDT	Special Weather Statement	GSP	Lincoln	49 min
Sep 10, 12:48 AM EDT	Special Weather Statement	GSP	Burke, McDowell	42 min
Sep 10, 3:20 PM EDT	Special Weather Statement	GSP	Transylvania	40 min
Sep 10, 3:24 PM EDT	Special Weather Statement	GSP	Union	51 min
Sep 10, 4:22 PM EDT	Special Weather Statement	GSP	Mecklenburg	38 min
Sep 10, 5:29 PM EDT	Special Weather Statement	GSP	Polk, Rutherford	46 min
Sep 10, 6:11 PM EDT	Special Weather Statement	GSP	Cleveland, Rutherford	34 min
Sep 10, 6:36 PM EDT	Special Weather Statement	GSP	Cleveland	24 min
Sep 10, 7:13 PM EDT	Special Weather Statement	GSP	Catawba, Lincoln	47 min
Sep 10, 7:48 PM EDT	Special Weather Statement	GSP	Catawba, Gaston, Lincoln	27 min
Sep 10, 7:55 PM EDT	Special Weather Statement	GSP	Gaston	35 min
Sep 9, 9:38 PM EDT	Special Weather Statement	GSP	Anderson	52 min
Sep 10, 2:41 PM EDT	Special Weather Statement	GSP	Chester	34 min
Sep 10, 2:54 PM EDT	Special Weather Statement	GSP	Oconee	36 min
Sep 10, 3:38 PM EDT	Special Weather Statement	GSP	Anderson	37 min
Sep 10, 3:47 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Oconee, Pickens	21 min
Sep 10, 4:16 PM EDT	Special Weather Statement	GSP	Greenville, Pickens	44 min
Sep 10, 4:48 PM EDT	Special Weather Statement	GSP	Greenville	42 min
Sep 10, 5:11 PM EDT	Special Weather Statement	GSP	Greenville	34 min
Sep 10, 5:34 PM EDT	Special Weather Statement	GSP	Cherokee, Laurens, Spartanburg	41 min
Sep 10, 6:14 PM EDT	Special Weather Statement	GSP	Greenwood, Laurens	31 min
Sep 10, 6:41 PM EDT	Special Weather Statement	GSP	Greenwood, Laurens	34 min
Sep 10, 7:05 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, York	28 min
Sep 10, 7:33 PM EDT	Special Weather Statement	GSP	York	27 min
Sep 10, 2:59 PM EDT	Special Weather Statement	GSP	Hart	31 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2018 Severe Thunderstorm Warnings in Georgia, 2018 Every 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.