Alert archive / North Carolina / Wind Chill Advisories in 2018

Wind Chill Advisory 3, NWS Greenville-Spartanburg, SC

January 4, 201819 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this wind chill advisory at Jan 4, 2018, 3:29 AM EST for 19 counties in North Carolina; Rabun County, Georgia. It took effect at Jan 4, 2018, 5:00 PM EST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Jan 4, 2018, 3:29 AM EST (08:29 UTC)
In effect from: Jan 4, 2018, 5:00 PM EST
Expired: Jan 5, 2018, 12:00 PM EST
In force: 19 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Rabun County, GA, Alexander County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Davie County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 73 km from the middle of the area, began a volume at 08:33 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, 8.5 hours before the alert went out and 218 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: 2050 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: 3 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 Jan 3, 6:27 PM EST, 9 hours 2 minutes earlier.

Area forecast discussion, Jan 3, 6:27 PM EST, 9 hours 2 minutes before

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Hazardous weather outlook, Jan 3, 5:41 PM EST, 9 hours 48 minutes before

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Nearby

Wind Chill Advisories in North Carolina, 2018 Wind Chill Advisories in Georgia, 2018 Every wind chill advisory in 2018

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.