Alert archive / North Carolina / Freeze Warnings in 2007

Freeze Warning 3, NWS Greenville-Spartanburg, SC

April 7, 200716 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this freeze warning at Apr 7, 2007, 4:37 AM EDT for 16 counties in North Carolina; 8 counties in South Carolina; 4 counties in Georgia. It took effect at Apr 7, 2007, 8:00 PM EDT. It was in force for 13 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 7, 2007, 4:37 AM EDT (08:37 UTC)
In effect from: Apr 7, 2007, 8:00 PM EDT
Expired: Apr 8, 2007, 9:20 AM EDT
In force: 13 hr
Issued by: NWS Greenville-Spartanburg, SC

All 28 counties

Elbert County, GA, Franklin 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), 56 km from the middle of the area, began a volume at 08:40 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, 8.6 hours before the alert went out and 289 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: 1552 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -36 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

What forecasters said that day

The local office's own words before this freeze warning 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 freeze warning went out at Apr 7, 3:51 AM EDT, 46 minutes earlier.

Area forecast discussion, Apr 7, 3:51 AM EDT, 46 minutes before

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Hazardous weather outlook, Apr 6, 11:14 PM EDT, 5 hours 23 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 6, 10:51 PM EDT	Snow Advisory	GSP	Avery, Graham, Haywood, Madison, Mitchell, Swain and 1 more	16 hr
Apr 7, 4:37 AM EDT	Lake Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	18 hr
Apr 7, 3:29 PM EDT	Freeze Watch	GSP	Alexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more	12 hr

Nearby

Freeze Warnings in North Carolina, 2007 Freeze Warnings in South Carolina, 2007 Freeze Warnings in Georgia, 2007 Every freeze warning 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.