Alert archive / North Carolina / Frost Advisories in 2008

Frost Advisory 2, NWS Greenville-Spartanburg, SC

April 15, 200816 counties in North Carolina; 8 counties in South Carolina; 5 counties in Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at Apr 15, 2008, 3:50 AM EDT for 16 counties in North Carolina; 8 counties in South Carolina; 5 counties in Georgia. It took effect at Apr 16, 2008, 2:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Apr 15, 2008, 3:50 AM EDT (07:50 UTC)
In effect from: Apr 16, 2008, 2:00 AM EDT
Expired: Apr 16, 2008, 9:00 AM EDT
In force: 7 hr
Issued by: NWS Greenville-Spartanburg, SC

All 29 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Stephens County, GA, Alexander County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Polk County, NC, Rowan County, NC, Rutherford 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), 50 km from the middle of the area, began a volume at 07:51 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

Charleston AFB, SC (KCHS), launched 00:00Z, 7.8 hours before the alert went out and 291 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: 1427 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 37 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 Apr 15, 3:18 AM EDT, 32 minutes earlier.

Area forecast discussion, Apr 15, 3:18 AM EDT, 32 minutes before

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Hazardous weather outlook, Apr 14, 9:09 PM EDT, 6 hours 41 minutes before

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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
Apr 15, 3:50 AM EDT	Freeze Warning	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	29 hr

Nearby

Frost Advisories in North Carolina, 2008 Frost Advisories in South Carolina, 2008 Frost Advisories in Georgia, 2008 Every frost advisory in 2008

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.