Alert archive / North Carolina / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 312, NWS Greenville-Spartanburg, SC

October 11, 2014Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Oct 11, 2014, 5:44 PM EDT for Union County, North Carolina. It was in force for 46 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: Oct 11, 2014, 5:44 PM EDT (21:44 UTC)
Expired: Oct 11, 2014, 6:30 PM EDT
In force: 46 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

County Union County, NC

The radar

The Columbia radar (KCAE), 128 km from the middle of the area, began a volume at 21:47 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, 9.7 hours before the alert went out and 134 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: 247 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 235 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

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 Oct 11, 4:34 PM EDT, 1 hour 10 minutes earlier.

Area forecast discussion, Oct 11, 4:34 PM EDT, 1 hour 10 minutes before

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Hazardous weather outlook, Oct 11, 4:53 PM EDT, 51 minutes before

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In the hours before

Special weather statement, Oct 11, 3:50 PM EDT, 1 hour 54 minutes before

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Local storm report, Oct 11, 4:12 PM EDT, 1 hour 32 minutes before

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Local storm report, Oct 11, 4:13 PM EDT, 1 hour 31 minutes before

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Special weather statement, Oct 11, 4:32 PM EDT, 1 hour 12 minutes before

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Special weather statement, Oct 11, 5:34 PM EDT, 10 minutes before

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Local storm report, Oct 11, 5:40 PM EDT, 4 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
Oct 10, 9:14 PM EDT	Special Weather Statement	GSP	Rowan	31 min
Oct 11, 4:31 AM EDT	Dense Fog Advisory	GSP	Alexander, Burke, Caldwell, Catawba, Davie, Iredell and 1 more	4 hr
Oct 11, 1:59 PM EDT	Special Weather Statement	GSP	Henderson, Polk	31 min
Oct 11, 2:14 PM EDT	Special Weather Statement	GSP	Burke	46 min
Oct 11, 2:31 PM EDT	Special Weather Statement	GSP	Polk	44 min
Oct 11, 2:36 PM EDT	Special Weather Statement	GSP	Rowan	39 min
Oct 11, 3:01 PM EDT	Special Weather Statement	GSP	Iredell, Rowan	44 min
Oct 11, 3:05 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Iredell, Rowan	55 min
Oct 11, 3:50 PM EDT	Special Weather Statement	GSP	Cabarrus	25 min
Oct 11, 3:58 PM EDT	Severe Thunderstorm Warning	GSP	Rowan	15 min
Oct 11, 4:32 PM EDT	Special Weather Statement	GSP	Cabarrus, Gaston, Mecklenburg	88 min
Oct 11, 5:34 PM EDT	Special Weather Statement	GSP	Union	71 min
Oct 11, 3:12 PM EDT	Special Weather Statement	GSP	Greenwood	33 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2014 Every severe thunderstorm warning in 2014

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.