Alert archive / Georgia / Freeze Warnings in 2009

Freeze Warning 4, NWS Charleston, SC

December 10, 20095 counties in Georgia

NWS Charleston, SC issued this freeze warning at Dec 10, 2009, 4:35 PM EST for 5 counties in Georgia. It took effect at Dec 11, 2009, 5:00 AM EST. It was in force for 4 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: Dec 10, 2009, 4:35 PM EST (21:35 UTC)
In effect from: Dec 11, 2009, 5:00 AM EST
Expired: Dec 11, 2009, 9:00 AM EST
In force: 4 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Tattnall County, GA

The radar

The Charleston,SC radar (KCLX), 84 km from the middle of the area, began a volume at 21:39 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 12:00Z, 9.6 hours before the alert went out and 278 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: 1914 m above ground
0-6 km bulk shear: 95 kt
0-1 km storm-relative helicity: -255 m²/s²
0-3 km storm-relative helicity: -54 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 Dec 9, 6:36 PM EST, 21 hours 59 minutes earlier.

Area forecast discussion, Dec 9, 6:36 PM EST, 21 hours 59 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
Dec 10, 4:28 AM EST	Freeze Watch	CHS	Bulloch, Candler, Effingham, Evans, Long, Tattnall	12 hr
Dec 10, 10:30 AM EST	River Flood Warning	CHS	Screven	6 days

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.