Alert archive / South Carolina / Frost Advisories in 2018
Frost Advisory 7, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this frost advisory at Oct 21, 2018, 4:14 AM EDT for 4 counties in North Carolina; 8 counties in South Carolina; 5 counties in Georgia. It took effect at Oct 22, 2018, 12:00 AM EDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Oct 21, 2018, 4:14 AM EDT (08:14 UTC)
- In effect from
- Oct 22, 2018, 12:00 AM EDT
- Expired
- Oct 22, 2018, 10:00 AM EDT
- In force
- 10 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Stephens County, GA, Cabarrus County, NC, Gaston County, NC, Mecklenburg County, NC, Union County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 08:19 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, 8.2 hours before the alert went out and 244 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
- 1756 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost 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 frost advisory went out at Oct 20, 2:45 PM EDT, 13 hours 29 minutes earlier.
Area forecast discussion, Oct 20, 2:45 PM EDT, 13 hours 29 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 |
|---|---|---|---|---|
| Oct 21, 4:14 AM EDT | Freeze Warning | GSP | Alexander, Avery, Buncombe, Burke, Caldwell, Catawba and 18 more | 30 hr |
Nearby
Frost Advisories in South Carolina, 2018Frost Advisories in Georgia, 2018Frost Advisories in North Carolina, 2018Every frost 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.