Alert archive / North Carolina / Lake Wind Advisories in 2011

Lake Wind Advisory 33, NWS Greenville-Spartanburg, SC

December 7, 201116 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia

NWS Greenville-Spartanburg, SC issued this lake wind advisory at Dec 7, 2011, 3:39 AM EST for 16 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia. It took effect at Dec 7, 2011, 12:00 PM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Dec 7, 2011, 3:39 AM EST (08:39 UTC)
In effect from: Dec 7, 2011, 12:00 PM EST
Expired: Dec 7, 2011, 10:00 PM EST
In force: 10 hr
Issued by: NWS Greenville-Spartanburg, SC

All 30 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Alexander County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Union County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 45 km from the middle of the area, began a volume at 08:40 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 00:00Z, 8.7 hours before the alert went out and 293 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: 15 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 96 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

What forecasters said that day

The local office's own words before this lake wind advisory 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 lake wind advisory went out at Dec 7, 1:16 AM EST, 2 hours 23 minutes earlier.

Area forecast discussion, Dec 7, 1:16 AM EST, 2 hours 23 minutes before

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Hazardous weather outlook, Dec 6, 9:50 PM EST, 5 hours 49 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 6, 9:47 PM EST	Winter Weather Advisory	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more	28 hr
Dec 7, 4:49 PM EST	Special Weather Statement	GSP	Burke	26 min
Dec 7, 5:02 PM EST	Special Weather Statement	GSP	Catawba	28 min
Dec 7, 5:24 PM EST	Special Weather Statement	GSP	Alexander	36 min
Dec 7, 6:23 PM EST	Special Weather Statement	GSP	Cabarrus, Davie, Iredell, Rowan	52 min

Nearby

Lake Wind Advisories in North Carolina, 2011 Lake Wind Advisories in South Carolina, 2011 Lake Wind Advisories in Georgia, 2011 Every lake wind advisory 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.