Alert archive / North Carolina / Frost Advisories in 2016

Frost Advisory 6, NWS Greenville-Spartanburg, SC

April 12, 20164 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this frost advisory at Apr 12, 2016, 2:49 PM EDT for 4 counties in North Carolina. It took effect at Apr 13, 2016, 2:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Apr 12, 2016, 2:49 PM EDT (18:49 UTC)
In effect from
Apr 13, 2016, 2:00 AM EDT
Expired
Apr 13, 2016, 9:00 AM EDT
In force
7 hr
Issued by
NWS Greenville-Spartanburg, SC

Counties Avery County, NC, Madison County, NC, Mitchell County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 104 km from the middle of the area, began a volume at 18:51 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, 6.8 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.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2016-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2016-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
221 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 3:50 PM EDTSpecial Weather StatementGSPPickens40 min
Apr 12, 3:54 PM EDTSevere Thunderstorm WarningGSPAnderson, Pickens51 min
Apr 12, 4:43 PM EDTSevere Thunderstorm WarningGSPAnderson, Pickens47 min
Apr 12, 5:31 PM EDTSevere Thunderstorm WarningGSPAnderson44 min
Apr 12, 6:29 PM EDTSpecial Weather StatementGSPUnion31 min
Apr 12, 7:14 PM EDTSpecial Weather StatementGSPLaurens31 min
Apr 12, 6:11 PM EDTSpecial Weather StatementGSPStephens34 min

Nearby

Frost Advisories in North Carolina, 2016Every frost advisory in 2016

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.