Alert archive / Georgia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 344, NWS Charleston, SC

December 11, 20084 counties in South Carolina; 6 counties in Georgia

NWS Charleston, SC issued this severe thunderstorm warning at Dec 11, 2008, 11:28 AM EST for 4 counties in South Carolina; 6 counties in Georgia. It was in force for 62 min. 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 11, 2008, 11:28 AM EST (16:28 UTC)
Expired: Dec 11, 2008, 12:30 PM EST
In force: 62 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

Counties Bryan County, GA, Bulloch County, GA, Chatham County, GA, Effingham County, GA, Liberty County, GA, Screven County, GA, Allendale County, SC, Beaufort County, SC, Hampton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 38 km from the middle of the area, began a volume at 16:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 11, 11:00 AM EST	Tornado Watch	SPC	8 hr
Dec 11, 5:48 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 4.5 hours before the alert went out and 134 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: 823 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 176 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Dec 11, 10:59 AM EST, 29 minutes earlier.

Area forecast discussion, Dec 11, 10:59 AM EST, 29 minutes before

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Hazardous weather outlook, Dec 11, 11:28 AM EST, 0 minutes before

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In the hours before

Local storm report, Dec 11, 11:18 AM EST, 10 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 11, 10:22 AM EST	High Surf Advisory	CHS		17 hr
Dec 11, 11:24 AM EST	Special Marine Warning	CHS		66 min
Dec 11, 11:59 AM EST	Special Marine Warning	CHS		61 min
Dec 11, 12:29 PM EST	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton, Dorchester, Hampton, Jasper	61 min
Dec 11, 1:02 PM EST	Special Marine Warning	CHS		58 min
Dec 11, 1:28 PM EST	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	92 min
Dec 11, 1:52 PM EST	Special Marine Warning	CHS		113 min
Dec 10, 7:13 PM EST	Areal Flood Advisory	CHS	Jenkins	3 hr
Dec 10, 11:51 PM EST	Areal Flood Advisory	CHS	Jenkins	3 hr
Dec 11, 10:32 AM EST	Severe Thunderstorm Warning	CHS	Candler, Evans, Liberty, Long, McIntosh, Tattnall	43 min
Dec 11, 10:57 AM EST	Severe Thunderstorm Warning	CHS	Bryan, Bulloch, Candler, Evans, Jenkins, Liberty and 1 more	48 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2008 Severe Thunderstorm Warnings in South Carolina, 2008 Every severe thunderstorm warning in 2008

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.