Alert archive / North Carolina / Wind Chill Advisories in 2007

Wind Chill Advisory 4, NWS Greenville-Spartanburg, SC

February 4, 200717 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this wind chill advisory at Feb 4, 2007, 2:30 PM EST for 17 counties in North Carolina. It took effect at Feb 5, 2007, 12:00 AM EST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Feb 4, 2007, 2:30 PM EST (19:30 UTC)
In effect from: Feb 5, 2007, 12:00 AM EST
Expired: Feb 5, 2007, 9:00 AM EST
In force: 9 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 83 km from the middle of the area, began a volume at 19:31 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

Roanoke, VA (KRNK), launched 12:00Z, 7.5 hours before the alert went out and 326 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: 1241 m above ground
0-6 km bulk shear: 146 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -52 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 4, 10:04 AM EST, 4 hours 26 minutes earlier.

Area forecast discussion, Feb 4, 10:04 AM EST, 4 hours 26 minutes before

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Hazardous weather outlook, Feb 4, 12:22 PM EST, 2 hours 8 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 4, 3:24 AM EST	Lake Wind Advisory	GSP	Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more	7 hr
Feb 4, 3:24 AM EST	Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	23 hr

Nearby

Wind Chill Advisories in North Carolina, 2007 Every wind chill advisory in 2007

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.