Alert archive / North Carolina / Winter Storm Watches in 2021

Winter Storm Watch 6, NWS Greenville-Spartanburg, SC

February 16, 202127 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this winter storm watch at Feb 16, 2021, 2:48 PM EST for 27 counties in North Carolina; Rabun County, Georgia. It took effect at Feb 17, 2021, 7:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 16, 2021, 2:48 PM EST (19:48 UTC)
In effect from: Feb 17, 2021, 7:00 PM EST
Expired: Feb 17, 2021, 4:15 AM EST
In force
Issued by: NWS Greenville-Spartanburg, SC

All 28 counties

Rabun County, GA, Alexander County, NC, Avery 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, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 77 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 199 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: 571 m above ground
0-6 km bulk shear: 99 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 186 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 winter storm 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 winter storm watch went out at Feb 16, 2:47 PM EST, 1 minute earlier.

Area forecast discussion, Feb 16, 2:47 PM EST, 1 minute before

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Hazardous weather outlook, Feb 16, 5:54 AM EST, 8 hours 54 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 15, 10:10 PM EST	Special Weather Statement	GSP	Cleveland	110 min
Feb 15, 10:54 PM EST	Areal Flood Advisory	GSP	Mecklenburg	4 hr
Feb 15, 11:23 PM EST	Areal Flood Advisory	GSP	Rowan	4 hr
Feb 16, 12:12 AM EST	River Flood Advisory	GSP	Gaston	24 hr
Feb 16, 2:52 AM EST	Areal Flood Advisory	GSP	Cabarrus	12 hr
Feb 16, 5:08 AM EST	Areal Flood Advisory	GSP	Rowan	17 hr
Feb 15, 7:16 PM EST	Special Weather Statement	GSP	Abbeville, Greenwood	29 min
Feb 15, 8:06 PM EST	Special Weather Statement	GSP	Chester	24 min

Nearby

Winter Storm Watches in North Carolina, 2021 Winter Storm Watches in Georgia, 2021 Winter Storm Watches in South Carolina, 2021 Every winter storm watch in 2021

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.