Alert archive / North Carolina / Frost Advisories in 2007

Frost Advisory 4, NWS Greenville-Spartanburg, SC

October 28, 20078 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at Oct 28, 2007, 3:22 PM EDT for 8 counties in North Carolina; Rabun County, Georgia. It took effect at Oct 29, 2007, 12:00 AM EDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Oct 28, 2007, 3:22 PM EDT (19:22 UTC)
In effect from
Oct 29, 2007, 12:00 AM EDT
Expired
Oct 29, 2007, 10:00 AM EDT
In force
10 hr
Issued by
NWS Greenville-Spartanburg, SC

Counties Rabun County, GA, Alexander County, NC, Burke County, NC, Caldwell County, NC, Davie County, NC, Iredell County, NC, McDowell County, NC, Polk County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 94 km from the middle of the area, began a volume at 19:22 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, 7.4 hours before the alert went out and 264 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, Roanoke, VA at 12:00Z on 2007-10-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Roanoke, VA at 12:00Z on 2007-10-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -72 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
970 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-72 m²/s²
0-3 km storm-relative helicity
-4 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
Oct 28, 3:07 AM EDTFreeze WatchGSPAlexander, Avery, Buncombe, Burke, Caldwell, Catawba and 17 more24 hr
Oct 28, 3:07 AM EDTFreeze WarningGSPAvery, Buncombe, Burke, Caldwell, Graham, Haywood and 9 more31 hr

Nearby

Frost Advisories in North Carolina, 2007Frost Advisories in Georgia, 2007Every frost advisory in 2007

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.