Alert archive / North Carolina / Wind Chill Advisories in 2015

Wind Chill Advisory 6, NWS Greenville-Spartanburg, SC

February 18, 201525 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia

NWS Greenville-Spartanburg, SC issued this wind chill advisory at Feb 18, 2015, 4:55 AM EST for 25 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia. It took effect at Feb 18, 2015, 7:00 PM EST. It was in force for 39 hr.

The area

The counties it named.

The facts

Issued: Feb 18, 2015, 4:55 AM EST (09:55 UTC)
In effect from: Feb 18, 2015, 7:00 PM EST
Expired: Feb 20, 2015, 10:00 AM EST
In force: 39 hr
Issued by: NWS Greenville-Spartanburg, SC

All 39 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Alexander County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania 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), 33 km from the middle of the area, began a volume at 09:57 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, 9.9 hours before the alert went out and 222 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 109 kt
0-1 km storm-relative helicity: -150 m²/s²
0-3 km storm-relative helicity: -74 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 wind chill 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 wind chill advisory went out at Feb 18, 3:35 AM EST, 1 hour 20 minutes earlier.

Area forecast discussion, Feb 18, 3:35 AM EST, 1 hour 20 minutes before

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Hazardous weather outlook, Feb 17, 4:52 PM EST, 12 hours 3 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
Feb 18, 4:55 AM EST	Wind Chill Warning	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 9 more	53 hr
Feb 18, 11:01 AM EST	Wind Advisory	GSP	Buncombe, Cabarrus, Cleveland, Gaston, Henderson, Jackson and 7 more	8 hr

Nearby

Wind Chill Advisories in North Carolina, 2015 Wind Chill Advisories in South Carolina, 2015 Wind Chill Advisories in Georgia, 2015 Every wind chill advisory in 2015

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.