Alert archive / Georgia / Dense Fog Advisories in 2014

Dense Fog Advisory 21, NWS Charleston, SC

December 23, 20145 counties in South Carolina; 8 counties in Georgia

NWS Charleston, SC issued this dense fog advisory at Dec 23, 2014, 3:48 PM EST for 5 counties in South Carolina; 8 counties in Georgia. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Dec 23, 2014, 3:48 PM EST (20:48 UTC)
Expired: Dec 24, 2014, 12:25 AM EST
In force: 9 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 20:47 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, 8.8 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: 430 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 323 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at Dec 23, 2:12 PM EST, 1 hour 36 minutes earlier.

Area forecast discussion, Dec 23, 2:12 PM EST, 1 hour 36 minutes before

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Hazardous weather outlook, Dec 23, 1:42 PM EST, 2 hours 6 minutes before

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In the hours before

Local storm report, Dec 23, 9:55 AM EST, 5 hours 53 minutes before

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Local storm report, Dec 23, 9:57 AM EST, 5 hours 51 minutes before

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Local storm report, Dec 23, 3:47 PM EST, 1 minute 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 22, 8:00 PM EST	Dense Fog Advisory	CHS	Allendale, Berkeley, Colleton, Dorchester, Hampton	17 hr
Dec 22, 8:02 PM EST	Marine Dense Fog Advisory	CHS		43 hr
Dec 22, 8:26 PM EST	Special Marine Warning	CHS		49 min
Dec 23, 3:40 AM EST	Small Craft Advisory	CHS		54 hr
Dec 23, 4:29 AM EST	Coastal Flood Advisory	CHS		7 hr
Dec 23, 3:53 PM EST	Gale Watch	CHS		11 hr
Dec 23, 5:44 PM EST	Small Craft Advisory	CHS		40 hr

Nearby

Dense Fog Advisories in Georgia, 2014 Dense Fog Advisories in South Carolina, 2014 Every dense fog advisory in 2014

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.