Alert archive / North Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 441, NWS Greenville-Spartanburg, SC

October 25, 20109 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Oct 25, 2010, 8:47 AM EDT for 9 counties in North Carolina. It was in force for 58 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 25, 2010, 8:47 AM EDT (12:47 UTC)
Expired: Oct 25, 2010, 9:45 AM EDT
In force: 58 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Buncombe County, NC, Burke County, NC, Cleveland County, NC, Henderson County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 79 km from the middle of the area, began a volume at 12:50 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Oct 25, 5:35 AM EDT	Tornado Watch	SPC	7 hr
Oct 25, 8:23 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.8 hours before the alert went out and 331 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: 324 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 707 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

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 25, 7:27 AM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, Oct 25, 7:27 AM EDT, 1 hour 20 minutes before

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Hazardous weather outlook, Oct 25, 5:49 AM EDT, 2 hours 58 minutes before

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In the hours before

Local storm report, Oct 25, 8:07 AM EDT, 40 minutes before

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Local storm report, Oct 25, 8:21 AM EDT, 26 minutes before

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Local storm report, Oct 25, 8:26 AM EDT, 21 minutes before

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Local storm report, Oct 25, 8:35 AM EDT, 12 minutes before

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Local storm report, Oct 25, 8:40 AM EDT, 7 minutes before

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Local storm report, Oct 25, 8:45 AM EDT, 2 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 25, 6:56 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Haywood, Jackson, Macon, Swain	79 min
Oct 25, 7:54 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Henderson, Jackson, Madison, Transylvania	51 min
Oct 25, 8:14 AM EDT	Severe Thunderstorm Warning	GSP	Transylvania	76 min
Oct 25, 8:21 AM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon	18 min
Oct 25, 8:32 AM EDT	Severe Thunderstorm Warning	GSP	Avery, Burke, Mitchell, Yancey	58 min
Oct 25, 8:51 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Henderson, Polk, Transylvania	31 min
Oct 25, 9:48 AM EDT	Special Weather Statement	GSP	Catawba, Cleveland, Gaston, Lincoln	42 min
Oct 25, 10:07 AM EDT	Severe Thunderstorm Warning	GSP	Catawba, Cleveland, Gaston, Lincoln	53 min
Oct 25, 10:10 AM EDT	Severe Thunderstorm Warning	GSP	Alexander, Caldwell, Catawba, Iredell	54 min
Oct 25, 10:48 AM EDT	Special Weather Statement	GSP	Cabarrus	42 min
Oct 25, 11:28 AM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Rowan	30 min
Oct 25, 11:39 AM EDT	Special Weather Statement	GSP	Cabarrus, Union	66 min
Oct 25, 9:08 AM EDT	Special Weather Statement	GSP	Abbeville	52 min
Oct 25, 9:46 AM EDT	Special Weather Statement	GSP	Cherokee, Chester, Laurens, Spartanburg, Union	59 min
Oct 25, 10:43 AM EDT	Special Weather Statement	GSP	Chester, York	62 min

Nearby

Severe Thunderstorm Warnings in North 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.