Alert archive / North Carolina / Wind Chill Watches in 2015

Wind Chill Watch 2, NWS Greenville-Spartanburg, SC

February 17, 201515 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this wind chill watch at Feb 17, 2015, 4:24 PM EST for 15 counties in North Carolina. It took effect at Feb 18, 2015, 7:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 17, 2015, 4:24 PM EST (21:24 UTC)
In effect from: Feb 18, 2015, 7:00 PM EST
Expired: Feb 18, 2015, 4:55 AM EST
In force
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, Swain County, NC, Transylvania County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 88 km from the middle of the area, began a volume at 21:26 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 12:00Z, 9.4 hours before the alert went out and 249 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: 610 m above ground
0-6 km bulk shear: 113 kt
0-1 km storm-relative helicity: -248 m²/s²
0-3 km storm-relative helicity: 122 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 watch 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 watch went out at Feb 17, 3:16 PM EST, 1 hour 8 minutes earlier.

Area forecast discussion, Feb 17, 3:16 PM EST, 1 hour 8 minutes before

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Hazardous weather outlook, Feb 17, 5:24 AM EST, 11 hours before

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In the hours before

Local storm report, Feb 17, 1:34 PM EST, 2 hours 50 minutes before

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Local storm report, Feb 17, 2:35 PM EST, 1 hour 49 minutes before

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Local storm report, Feb 17, 2:45 PM EST, 1 hour 39 minutes before

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Local storm report, Feb 17, 2:50 PM EST, 1 hour 34 minutes before

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Local storm report, Feb 17, 2:57 PM EST, 1 hour 27 minutes before

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Local storm report, Feb 17, 3:34 PM EST, 50 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 17, 4:24 PM EST	Winter Weather Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	39 hr

Nearby

Wind Chill Watches in North Carolina, 2015 Every wind chill watch 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.