Alert archive / South Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 270, NWS Greenville-Spartanburg, SC

July 12, 2010Greenwood County, Laurens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 12, 2010, 1:30 PM EDT for Greenwood County, Laurens County, South Carolina. It was in force for 60 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 12, 2010, 1:30 PM EDT (17:30 UTC)
Expired: Jul 12, 2010, 2:30 PM EDT
In force: 60 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Greenwood County, SC, Laurens County, SC

The radar

The Greer radar (KGSP), 64 km from the middle of the area, began a volume at 17:33 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 12:00Z, 5.5 hours before the alert went out and 248 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: 2479 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 525 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 48 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 Jul 12, 10:35 AM EDT, 2 hours 55 minutes earlier.

Area forecast discussion, Jul 12, 10:35 AM EDT, 2 hours 55 minutes before

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Hazardous weather outlook, Jul 12, 5:22 AM EDT, 8 hours 8 minutes before

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In the hours before

Local storm report, Jul 12, 8:54 AM EDT, 4 hours 36 minutes before

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Special weather statement, Jul 12, 11:31 AM EDT, 1 hour 59 minutes before

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Special weather statement, Jul 12, 11:44 AM EDT, 1 hour 46 minutes before

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Local storm report, Jul 12, 11:57 AM EDT, 1 hour 33 minutes before

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Special weather statement, Jul 12, 12:11 PM EDT, 1 hour 19 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
Jul 12, 11:31 AM EDT	Special Weather Statement	GSP	Alexander	44 min
Jul 12, 11:44 AM EDT	Special Weather Statement	GSP	Cleveland	46 min
Jul 12, 12:11 PM EDT	Special Weather Statement	GSP	Lincoln	64 min
Jul 12, 12:59 PM EDT	Tornado Warning	GSP	Cabarrus, Iredell, Lincoln, Mecklenburg	46 min
Jul 12, 1:38 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg, Union	52 min
Jul 12, 1:46 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	59 min
Jul 12, 1:55 PM EDT	Areal Flood Advisory	GSP	Cabarrus, Gaston, Mecklenburg	110 min
Jul 12, 2:30 PM EDT	Flash Flood Warning	GSP	Cabarrus, Mecklenburg	3 hr
Jul 12, 4:49 PM EDT	Special Weather Statement	GSP	Union	41 min
Jul 12, 5:20 PM EDT	Areal Flood Warning	GSP	Mecklenburg, Union	115 min
Jul 12, 6:22 PM EDT	Special Weather Statement	GSP	Cleveland	38 min
Jul 11, 8:04 PM EDT	Areal Flood Advisory	GSP	Greenville, Spartanburg	56 min
Jul 11, 8:23 PM EDT	Special Weather Statement	GSP	Greenville	37 min
Jul 11, 8:51 PM EDT	Special Weather Statement	GSP	Spartanburg	24 min
Jul 11, 8:53 PM EDT	Special Weather Statement	GSP	Laurens	37 min
Jul 11, 9:35 PM EDT	Special Weather Statement	GSP	Union	55 min
Jul 11, 9:46 PM EDT	Areal Flood Advisory	GSP	Greenville	59 min
Jul 12, 2:33 PM EDT	Severe Thunderstorm Warning	GSP	Laurens, Union	57 min
Jul 12, 3:12 PM EDT	Special Weather Statement	GSP	Union	48 min
Jul 12, 3:49 PM EDT	Special Weather Statement	GSP	York	41 min
Jul 12, 3:54 PM EDT	Special Weather Statement	GSP	Chester	36 min
Jul 12, 7:40 PM EDT	Special Weather Statement	GSP	Laurens	35 min
Jul 12, 6:06 PM EDT	Special Weather Statement	GSP	Elbert	24 min
Jul 12, 7:02 PM EDT	Special Weather Statement	GSP	Hart	28 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2010 Every severe thunderstorm warning in 2010

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.