Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Greenville-Spartanburg, SC

July 20, 20124 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Jul 20, 2012, 11:42 PM EDT for 4 counties in North Carolina. It was in force for 93 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2012, 11:42 PM EDT (03:42 UTC)
Expired: Jul 21, 2012, 1:15 AM EDT
In force: 93 min
Issued by: NWS Greenville-Spartanburg, SC

Counties Avery County, NC, Madison County, NC, Mitchell County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 97 km from the middle of the area, began a volume at 03:44 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.7 hours before the alert went out and 351 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: 1017 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 20, 10:42 PM EDT, 1 hour earlier.

Area forecast discussion, Jul 20, 10:42 PM EDT, 1 hour before

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Hazardous weather outlook, Jul 20, 10:47 PM EDT, 55 minutes before

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In the hours before

Special weather statement, Jul 20, 7:38 PM EDT, 4 hours 4 minutes before

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Local storm report, Jul 20, 7:42 PM EDT, 4 hours before

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Special weather statement, Jul 20, 7:46 PM EDT, 3 hours 56 minutes before

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Special weather statement, Jul 20, 8:30 PM EDT, 3 hours 12 minutes before

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Special weather statement, Jul 20, 9:29 PM EDT, 2 hours 13 minutes before

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Special weather statement, Jul 20, 11:42 PM 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
Jul 21, 2:46 PM EDT	Special Weather Statement	GSP	McDowell	29 min
Jul 21, 3:12 PM EDT	Special Weather Statement	GSP	Swain	33 min
Jul 21, 3:38 PM EDT	Special Weather Statement	GSP	Davie	37 min
Jul 21, 4:12 PM EDT	Special Weather Statement	GSP	Haywood	33 min
Jul 21, 4:43 PM EDT	Special Weather Statement	GSP	Buncombe	32 min
Jul 21, 5:09 PM EDT	Special Weather Statement	GSP	Rutherford	36 min
Jul 21, 5:41 PM EDT	Special Weather Statement	GSP	Catawba	34 min
Jul 21, 5:43 PM EDT	Special Weather Statement	GSP	Union	47 min
Jul 21, 5:50 PM EDT	Severe Thunderstorm Warning	GSP	Union	21 min
Jul 21, 5:58 PM EDT	Special Weather Statement	GSP	Burke	32 min
Jul 21, 6:08 PM EDT	Special Weather Statement	GSP	Iredell	37 min
Jul 21, 6:14 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Catawba, Iredell	61 min
Jul 21, 6:19 PM EDT	Special Weather Statement	GSP	Catawba	26 min
Jul 21, 6:26 PM EDT	Areal Flood Advisory	GSP	Alexander, Burke, Caldwell, Catawba, Iredell	2 hr
Jul 21, 6:29 PM EDT	Special Weather Statement	GSP	Iredell	31 min
Jul 21, 6:36 PM EDT	Flash Flood Warning	GSP	Alexander, Burke, Caldwell, Catawba	105 min
Jul 21, 6:50 PM EDT	Special Weather Statement	GSP	Caldwell	25 min
Jul 21, 6:57 PM EDT	Areal Flood Advisory	GSP	Iredell	73 min
Jul 21, 7:11 PM EDT	Flash Flood Warning	GSP	Iredell	60 min
Jul 21, 7:16 PM EDT	Special Weather Statement	GSP	Davie	29 min
Jul 21, 7:19 PM EDT	Special Weather Statement	GSP	Davie	26 min
Jul 20, 8:30 PM EDT	Special Weather Statement	GSP	Pickens	30 min
Jul 20, 9:29 PM EDT	Special Weather Statement	GSP	Greenville	31 min
Jul 21, 3:49 PM EDT	Special Weather Statement	GSP	Anderson	26 min
Jul 21, 10:25 AM EDT	Areal Flood Advisory	GSP	Elbert	2 hr
Jul 21, 5:40 PM EDT	Special Weather Statement	GSP	Elbert	35 min

Nearby

Special Weather Statements in North Carolina, 2012 Every special weather statement in 2012

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.