Alert archive / South Carolina / Freeze Watches in 2007

Freeze Watch 2, NWS Columbia, SC

April 5, 200716 counties in South Carolina; 5 counties in Georgia

NWS Columbia, SC issued this freeze watch at Apr 5, 2007, 2:12 PM EDT for 16 counties in South Carolina; 5 counties in Georgia. It took effect at Apr 8, 2007, 12:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 5, 2007, 2:12 PM EDT (18:12 UTC)
In effect from: Apr 8, 2007, 12:00 AM EDT
Expired: Apr 7, 2007, 4:27 AM EDT
In force
Issued by: NWS Columbia, SC

All 21 counties

Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 28 km from the middle of the area, began a volume at 18:10 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, 6.2 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: 1339 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -91 m²/s²
0-3 km storm-relative helicity: -92 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this freeze watch went out at Apr 5, 1:52 PM EDT, 20 minutes earlier.

Area forecast discussion, Apr 5, 1:52 PM EDT, 20 minutes before

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Hazardous weather outlook, Apr 5, 8:00 AM EDT, 6 hours 12 minutes before

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The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 4, 8:37 PM EDT	Lake Wind Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	7 hr
Apr 5, 4:25 AM EDT	Frost Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Clarendon, Edgefield and 6 more	25 hr
Apr 5, 4:25 AM EDT	Freeze Warning	CAE	Chesterfield, Fairfield, Kershaw, Newberry	25 hr
Apr 5, 2:12 PM EDT	Freeze Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	15 hr
Apr 5, 2:56 PM EDT	Fire Weather Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	24 hr

Nearby

Freeze Watches in South Carolina, 2007 Freeze Watches in Georgia, 2007 Every freeze watch 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.