Alert archive / North Carolina / Winter Weather Advisories in 2021
Winter Weather Advisory 7, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this winter weather advisory at Jan 30, 2021, 4:21 AM EST for 15 counties in North Carolina; Rabun County, Georgia. It took effect at Jan 30, 2021, 8:00 PM EST. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Jan 30, 2021, 4:21 AM EST (09:21 UTC)
- In effect from
- Jan 30, 2021, 8:00 PM EST
- Expired
- Jan 31, 2021, 11:45 AM EST
- In force
- 16 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Rabun County, GA, Buncombe County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Haywood County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC
The radar
The Greer radar (KGSP), 66 km from the middle of the area, began a volume at 09:26 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 00:00Z, 9.4 hours before the alert went out and 214 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2267 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather 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 winter weather advisory went out at Jan 30, 3:41 AM EST, 40 minutes earlier.
Area forecast discussion, Jan 30, 3:41 AM EST, 40 minutes before
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</html>Hazardous weather outlook, Jan 29, 3:57 PM EST, 12 hours 24 minutes before
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</html>The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 30, 4:21 AM EST | Winter Storm Warning | GSP | Alexander, Avery, Burke, Caldwell, Henderson, McDowell and 4 more | 31 hr |
Nearby
Winter Weather Advisories in North Carolina, 2021Winter Weather Advisories in Georgia, 2021Every winter weather advisory 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.