Alert archive / North Carolina / Frost Advisories in 2008

Frost Advisory 3, NWS Greenville-Spartanburg, SC

April 16, 200814 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at Apr 16, 2008, 2:43 PM EDT for 14 counties in North Carolina; Rabun County, Georgia. It took effect at Apr 17, 2008, 2:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Apr 16, 2008, 2:43 PM EDT (18:43 UTC)
In effect from: Apr 17, 2008, 2:00 AM EDT
Expired: Apr 17, 2008, 9:00 AM EDT
In force: 7 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Rabun County, GA, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Davie County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Madison County, NC, McDowell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 77 km from the middle of the area, began a volume at 18:44 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

Roanoke, VA (KRNK), launched 12:00Z, 6.7 hours before the alert went out and 286 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: 2480 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 104 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, 7:08 PM EDT, 19 hours 35 minutes earlier.

Area forecast discussion, Apr 15, 7:08 PM EDT, 19 hours 35 minutes before

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Hazardous weather outlook, Apr 15, 3:31 PM EDT, 23 hours 12 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 16, 2:43 PM EDT	Freeze Warning	GSP	Avery, Graham, Haywood, Jackson, Macon, Mitchell and 2 more	18 hr
Apr 16, 5:27 AM EDT	Red Flag Warning	GSP	Elbert, Franklin, Habersham, Hart, Rabun, Stephens	15 hr

Nearby

Frost Advisories in North 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.