Alert archive / South Carolina / Frost Advisories in 2016

Frost Advisory 14, NWS Greenville-Spartanburg, SC

November 12, 2016Union County, South Carolina

NWS Greenville-Spartanburg, SC issued this frost advisory at Nov 12, 2016, 3:25 PM EST for Union County, South Carolina. It took effect at Nov 13, 2016, 12:00 AM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Nov 12, 2016, 3:25 PM EST (20:25 UTC)
In effect from: Nov 13, 2016, 12:00 AM EST
Expired: Nov 13, 2016, 8:00 AM EST
In force: 8 hr
Issued by: NWS Greenville-Spartanburg, SC

County Union County, SC

The radar

The Greer radar (KGSP), 59 km from the middle of the area, began a volume at 20:23 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, 8.4 hours before the alert went out and 220 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1360 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -104 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Nov 11, 6:59 PM EST, 20 hours 26 minutes earlier.

Area forecast discussion, Nov 11, 6:59 PM EST, 20 hours 26 minutes before

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Hazardous weather outlook, Nov 11, 3:48 PM EST, 23 hours 37 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 12, 3:25 PM EST	Freeze Warning	GSP	Alexander, Buncombe, Burke, Cabarrus, Caldwell, Catawba and 12 more	17 hr

Nearby

Frost Advisories in South Carolina, 2016 Every 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.