Alert archive / North Carolina / Frost Advisories in 2018
Frost Advisory 5, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this frost advisory at Apr 28, 2018, 4:11 AM EDT for 4 counties in North Carolina. It took effect at Apr 29, 2018, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 28, 2018, 4:11 AM EDT (08:11 UTC)
- In effect from
- Apr 29, 2018, 2:00 AM EDT
- Expired
- Apr 29, 2018, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Graham County, NC, Jackson County, NC, Macon County, NC, Swain County, NC
The radar
The Knoxville radar (KMRX), 95 km from the middle of the area, began a volume at 08:10 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
Nashville Metro, TN (KBNA), launched 00:00Z, 8.2 hours before the alert went out and 296 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
- 2 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 2362 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 82 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 Apr 27, 7:51 PM EDT, 8 hours 20 minutes earlier.
Area forecast discussion, Apr 27, 7:51 PM EDT, 8 hours 20 minutes before
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</html>Hazardous weather outlook, Apr 27, 4:21 PM EDT, 11 hours 50 minutes before
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</html>Nearby
Frost 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.