Alert archive / North Carolina / Freeze Warnings in 2013
Freeze Warning 9, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this freeze warning at Apr 20, 2013, 3:28 AM EDT for Avery County, Mitchell County, Yancey County, North Carolina. It took effect at Apr 21, 2013, 12:00 AM EDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2013, 3:28 AM EDT (07:28 UTC)
- In effect from
- Apr 21, 2013, 12:00 AM EDT
- Expired
- Apr 21, 2013, 9:00 AM EDT
- In force
- 9 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Avery County, NC, Mitchell County, NC, Yancey County, NC
The radar
The Knoxville radar (KMRX), 116 km from the middle of the area, began a volume at 07:33 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, 7.5 hours before the alert went out and 201 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
- 111 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 565 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 3:28 AM EDT | Frost Advisory | GSP | Alexander, Buncombe, Burke, Caldwell, Graham, Haywood and 7 more | 30 hr |
Nearby
Freeze Warnings in North Carolina, 2013Every freeze warning in 2013
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.