Alert archive / North Carolina / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 12, NWS Greenville-Spartanburg, SC

February 21, 2014Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Feb 21, 2014, 9:14 AM EST for Union County, North Carolina. It was in force for 61 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: Feb 21, 2014, 9:14 AM EST (14:14 UTC)
Expired: Feb 21, 2014, 10:15 AM EST
In force: 61 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 14:18 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, 2.2 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: 24 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 272 m²/s²
0-3 km storm-relative helicity: 272 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 Feb 21, 8:34 AM EST, 40 minutes earlier.

Area forecast discussion, Feb 21, 8:34 AM EST, 40 minutes before

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Hazardous weather outlook, Feb 21, 8:28 AM EST, 46 minutes before

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In the hours before

Local storm report, Feb 21, 7:49 AM EST, 1 hour 25 minutes before

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Local storm report, Feb 21, 8:07 AM EST, 1 hour 7 minutes before

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Special weather statement, Feb 21, 8:16 AM EST, 58 minutes before

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Local storm report, Feb 21, 8:19 AM EST, 55 minutes before

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Special weather statement, Feb 21, 8:29 AM EST, 45 minutes before

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Local storm report, Feb 21, 8:48 AM EST, 26 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
Feb 21, 3:26 AM EST	Special Weather Statement	GSP	Graham, Swain	64 min
Feb 21, 3:58 AM EST	Severe Thunderstorm Warning	GSP	Graham, Swain	47 min
Feb 21, 4:30 AM EST	Severe Thunderstorm Warning	GSP	Haywood, Jackson, Macon, Swain	45 min
Feb 21, 6:12 AM EST	Severe Thunderstorm Warning	GSP	Rutherford	48 min
Feb 21, 6:56 AM EST	Special Weather Statement	GSP	Catawba, Cleveland, Gaston, Lincoln	49 min
Feb 21, 7:40 AM EST	Special Weather Statement	GSP	Catawba, Davie, Gaston, Iredell, Lincoln, Mecklenburg and 1 more	50 min
Feb 21, 8:16 AM EST	Special Weather Statement	GSP	Cabarrus, Davie, Iredell, Mecklenburg, Rowan	44 min
Feb 21, 8:29 AM EST	Special Weather Statement	GSP	Union	46 min
Feb 21, 9:11 AM EST	Areal Flood Advisory	GSP	Cabarrus, Mecklenburg, Union	79 min
Feb 21, 4:39 AM EST	Special Weather Statement	GSP	Anderson, Oconee, Pickens	66 min
Feb 21, 5:51 AM EST	Special Weather Statement	GSP	Anderson, Greenville	54 min
Feb 21, 5:59 AM EST	Tornado Warning	GSP	Oconee, Pickens	31 min
Feb 21, 6:39 AM EST	Areal Flood Advisory	GSP	Abbeville, Anderson, Greenville	81 min
Feb 21, 7:44 AM EST	Special Weather Statement	GSP	Chester, Laurens, Union, York	46 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.