Alert archive / North Carolina / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 191, NWS Greenville-Spartanburg, SC

July 21, 20154 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 21, 2015, 4:07 PM EDT for 4 counties in North Carolina. It was in force for 53 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 21, 2015, 4:07 PM EDT (20:07 UTC)
Expired: Jul 21, 2015, 5:00 PM EDT
In force: 53 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Cabarrus County, NC, Catawba County, NC, Iredell County, NC, Rowan County, NC

The radar

The Greer radar (KGSP), 154 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 312 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: 992 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 1106 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 80 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 21, 3:04 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jul 21, 3:04 PM EDT, 1 hour 3 minutes before

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Hazardous weather outlook, Jul 21, 5:29 AM EDT, 10 hours 38 minutes before

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In the hours before

Special weather statement, Jul 21, 2:14 PM EDT, 1 hour 53 minutes before

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Special weather statement, Jul 21, 2:21 PM EDT, 1 hour 46 minutes before

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Special weather statement, Jul 21, 2:58 PM EDT, 1 hour 9 minutes before

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Special weather statement, Jul 21, 3:05 PM EDT, 1 hour 2 minutes before

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Special weather statement, Jul 21, 3:46 PM EDT, 21 minutes before

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Special weather statement, Jul 21, 4:02 PM EDT, 5 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 20, 8:04 PM EDT	Special Weather Statement	GSP	Cabarrus	41 min
Jul 20, 8:16 PM EDT	Special Weather Statement	GSP	Burke	44 min
Jul 20, 8:22 PM EDT	Special Weather Statement	GSP	Henderson, Polk	23 min
Jul 20, 8:36 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk, Rutherford, Transylvania	54 min
Jul 20, 8:50 PM EDT	Special Weather Statement	GSP	Cleveland, Rutherford	40 min
Jul 20, 9:11 PM EDT	Severe Thunderstorm Warning	GSP	Burke, Cleveland, Gaston, Lincoln, Rutherford	64 min
Jul 20, 9:13 PM EDT	Special Weather Statement	GSP	Cabarrus	32 min
Jul 21, 2:14 PM EDT	Special Weather Statement	GSP	Henderson	46 min
Jul 21, 2:58 PM EDT	Special Weather Statement	GSP	Polk, Rutherford	47 min
Jul 21, 3:13 PM EDT	Severe Thunderstorm Warning	GSP	Polk, Rutherford	47 min
Jul 21, 3:22 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Polk, Rutherford	53 min
Jul 21, 3:46 PM EDT	Special Weather Statement	GSP	Iredell	44 min
Jul 21, 4:02 PM EDT	Special Weather Statement	GSP	Polk	43 min
Jul 21, 4:22 PM EDT	Severe Thunderstorm Warning	GSP	Polk	53 min
Jul 21, 4:28 PM EDT	Special Weather Statement	GSP	Catawba	47 min
Jul 21, 4:46 PM EDT	Special Weather Statement	GSP	Burke	29 min
Jul 21, 4:50 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Catawba, Iredell	40 min
Jul 21, 5:24 PM EDT	Severe Thunderstorm Warning	GSP	Catawba, Gaston, Lincoln	29 min
Jul 21, 5:29 PM EDT	Special Weather Statement	GSP	Cabarrus	16 min
Jul 21, 5:55 PM EDT	Special Weather Statement	GSP	Cabarrus	35 min
Jul 20, 9:33 PM EDT	Special Weather Statement	GSP	Spartanburg	42 min
Jul 21, 2:21 PM EDT	Special Weather Statement	GSP	Oconee	39 min
Jul 21, 3:05 PM EDT	Special Weather Statement	GSP	Anderson	40 min
Jul 21, 4:17 PM EDT	Special Weather Statement	GSP	Cherokee, York	43 min
Jul 21, 5:14 PM EDT	Special Weather Statement	GSP	Spartanburg	46 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2015 Every severe thunderstorm warning in 2015

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.