Alert archive / Georgia / Freeze Warnings in 2009

Freeze Warning 1, NWS Charleston, SC

April 7, 20098 counties in Georgia; 5 counties in South Carolina

NWS Charleston, SC issued this freeze warning at Apr 7, 2009, 4:20 AM EDT for 8 counties in Georgia; 5 counties in South Carolina. It took effect at Apr 8, 2009, 2:00 AM EDT. It was in force for 6 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, 2009, 4:20 AM EDT (08:20 UTC)
In effect from: Apr 8, 2009, 2:00 AM EDT
Expired: Apr 8, 2009, 8:25 AM EDT
In force: 6 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Jenkins County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 33 km from the middle of the area, began a volume at 08:21 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.3 hours before the alert went out and 304 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: 1189 m above ground
0-6 km bulk shear: 117 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: -46 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 Charleston, SC wrote its last area forecast discussion before this freeze warning went out at Apr 6, 7:50 PM EDT, 8 hours 30 minutes earlier.

Area forecast discussion, Apr 6, 7:50 PM EDT, 8 hours 30 minutes before

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Hazardous weather outlook, Apr 6, 6:03 PM EDT, 10 hours 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 1:43 AM EDT	Lake Wind Advisory	CHS	Berkeley	28 hr

Nearby

Freeze Warnings in Georgia, 2009 Freeze Warnings in South Carolina, 2009 Every freeze warning in 2009

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.