Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 109, NWS Greenville-Spartanburg, SC

April 28, 20114 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 28, 2011, 6:04 AM EDT for 4 counties in North Carolina. 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: Apr 28, 2011, 6:04 AM EDT (10:04 UTC)
Expired: Apr 28, 2011, 6:33 AM EDT
In force: 29 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Alexander County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC

The radar

The Greer radar (KGSP), 128 km from the middle of the area, began a volume at 10:04 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 00:00Z, 10.1 hours before the alert went out and 139 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: 2272 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 233 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 14.4

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 Apr 28, 5:09 AM EDT, 55 minutes earlier.

Area forecast discussion, Apr 28, 5:09 AM EDT, 55 minutes before

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Hazardous weather outlook, Apr 28, 5:56 AM EDT, 8 minutes before

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In the hours before

Local storm report, Apr 28, 4:09 AM EDT, 1 hour 55 minutes before

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Local storm report, Apr 28, 5:11 AM EDT, 53 minutes before

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Special weather statement, Apr 28, 5:26 AM EDT, 38 minutes before

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Special weather statement, Apr 28, 5:51 AM EDT, 13 minutes before

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Special weather statement, Apr 28, 5:55 AM EDT, 9 minutes before

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Local storm report, Apr 28, 6:04 AM EDT, 0 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
Apr 27, 10:43 PM EDT	Tornado Warning	GSP	Macon	47 min
Apr 27, 11:22 PM EDT	Tornado Warning	GSP	Haywood, Jackson, Macon, Transylvania	38 min
Apr 28, 12:04 AM EDT	Tornado Warning	GSP	Jackson, Macon	41 min
Apr 28, 12:41 AM EDT	Tornado Warning	GSP	Haywood, Jackson, Macon, Transylvania	34 min
Apr 28, 12:54 AM EDT	Tornado Warning	GSP	Jackson, Macon, Transylvania	51 min
Apr 28, 1:17 AM EDT	Special Weather Statement	GSP	Buncombe, Burke, McDowell	43 min
Apr 28, 1:31 AM EDT	Tornado Warning	GSP	Henderson, Transylvania	44 min
Apr 28, 2:03 AM EDT	Tornado Warning	GSP	Buncombe, Henderson, Polk, Rutherford	42 min
Apr 28, 2:26 AM EDT	Tornado Warning	GSP	Buncombe, Burke, Henderson, McDowell, Polk, Rutherford	49 min
Apr 28, 2:56 AM EDT	Tornado Warning	GSP	Alexander, Burke, Caldwell, Catawba, McDowell	64 min
Apr 28, 5:26 AM EDT	Special Weather Statement	GSP	Caldwell	34 min
Apr 28, 5:51 AM EDT	Special Weather Statement	GSP	Burke	24 min
Apr 28, 5:55 AM EDT	Special Weather Statement	GSP	Burke	35 min
Apr 28, 12:21 AM EDT	Tornado Warning	GSP	Oconee	39 min
Apr 28, 2:06 AM EDT	Special Weather Statement	GSP	Abbeville	39 min
Apr 28, 2:29 AM EDT	Severe Thunderstorm Warning	GSP	Abbeville, Greenwood	46 min
Apr 28, 3:09 AM EDT	Severe Thunderstorm Warning	GSP	Greenwood, Laurens	36 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011 Every severe thunderstorm warning in 2011

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.