Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

December 11, 20214 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Dec 11, 2021, 11:33 AM EST for 4 counties in North Carolina. It was in force for 72 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: Dec 11, 2021, 11:33 AM EST (16:33 UTC)
Expired: Dec 11, 2021, 12:45 PM EST
In force: 72 min
Issued by: NWS Greenville-Spartanburg, SC
Hail: 0.00 in
Wind: 50

Counties Graham County, NC, Haywood County, NC, Madison County, NC, Swain County, NC

The radar

The Knoxville radar (KMRX), 62 km from the middle of the area, began a volume at 16:36 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 12:00Z, 4.6 hours before the alert went out and 273 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: 182 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 625 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

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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 Dec 11, 9:47 AM EST, 1 hour 46 minutes earlier.

Area forecast discussion, Dec 11, 9:47 AM EST, 1 hour 46 minutes before

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Hazardous weather outlook, Dec 11, 9:53 AM EST, 1 hour 40 minutes before

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In the hours before

Special weather statement, Dec 11, 11:33 AM EST, 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
Dec 10, 8:32 PM EST	Dense Fog Advisory	GSP	Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more	15 hr
Dec 11, 3:35 AM EST	Wind Advisory	GSP	Avery, Graham, Haywood, Jackson, Macon, Madison and 4 more	24 hr
Dec 11, 12:45 PM EST	Special Weather Statement	GSP	Buncombe, Haywood, Jackson, Macon, Madison	75 min
Dec 11, 12:51 PM EST	Special Weather Statement	GSP	Avery, Mitchell, Yancey	54 min
Dec 11, 3:08 PM EST	Special Weather Statement	GSP	Alexander, Burke, Caldwell, Catawba, Cleveland, Iredell and 3 more	67 min
Dec 11, 3:43 PM EST	Special Weather Statement	GSP	Alexander, Catawba, Cleveland, Gaston, Iredell, Lincoln	47 min
Dec 11, 4:16 PM EST	Special Weather Statement	GSP	Cabarrus, Davie, Gaston, Iredell, Lincoln, Mecklenburg and 1 more	59 min
Dec 11, 5:08 PM EST	Special Weather Statement	GSP	Cabarrus, Mecklenburg, Union	67 min
Dec 11, 1:48 PM EST	Special Weather Statement	GSP	Oconee	57 min
Dec 11, 2:29 PM EST	Special Weather Statement	GSP	Pickens	31 min
Dec 11, 2:52 PM EST	Special Weather Statement	GSP	Anderson	53 min
Dec 11, 3:02 PM EST	Special Weather Statement	GSP	Greenville, Spartanburg	43 min
Dec 11, 3:36 PM EST	Special Weather Statement	GSP	Abbeville, Greenwood, Laurens, Union	39 min
Dec 11, 4:13 PM EST	Special Weather Statement	GSP	Chester, Greenwood, Union	62 min
Dec 11, 5:10 PM EST	Special Weather Statement	GSP	Chester	35 min
Dec 11, 1:21 PM EST	Special Weather Statement	GSP	Habersham, Rabun, Stephens	39 min

Nearby

Special Weather Statements in North Carolina, 2021 Every special weather statement in 2021

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.