Alert archive / Georgia / Dense Fog Advisories in 2011

Dense Fog Advisory 4, NWS Atlanta, GA

December 22, 201153 counties in Georgia

NWS Atlanta, GA issued this dense fog advisory at Dec 22, 2011, 8:04 AM EST for 53 counties in Georgia. It was in force for 116 min.

The area

The counties it named.

The facts

Issued: Dec 22, 2011, 8:04 AM EST (13:04 UTC)
Expired: Dec 22, 2011, 10:00 AM EST
In force: 116 min
Issued by: NWS Atlanta, GA

All 53 counties

Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Lamar County, GA, Lumpkin County, GA, Madison County, GA, Meriwether County, GA, Morgan County, GA, Murray County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Spalding County, GA, Towns County, GA, Troup County, GA, Union County, GA, Walker County, GA, Walton County, GA, White County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 74 km from the middle of the area, began a volume at 13:07 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, 1.1 hours before the alert went out and 72 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: 26 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 123 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 dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this dense fog advisory went out at Dec 22, 6:41 AM EST, 1 hour 23 minutes earlier.

Area forecast discussion, Dec 22, 6:41 AM EST, 1 hour 23 minutes before

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Hazardous weather outlook, Dec 22, 4:32 AM EST, 3 hours 32 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 21, 9:11 PM EST	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more	11 hr
Dec 22, 3:51 PM EST	Special Weather Statement	FFC	Chattooga, Floyd, Haralson, Polk	39 min
Dec 22, 4:14 PM EST	Special Weather Statement	FFC	Carroll	61 min
Dec 22, 4:26 PM EST	Severe Thunderstorm Warning	FFC	Haralson, Polk	32 min
Dec 22, 4:34 PM EST	Special Weather Statement	FFC	Towns, Union	26 min
Dec 22, 4:37 PM EST	Special Weather Statement	FFC	Bartow, Catoosa, Chattooga, Floyd, Gordon, Murray and 2 more	53 min
Dec 22, 4:39 PM EST	Special Weather Statement	FFC	Heard, Troup	66 min
Dec 22, 4:52 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Gordon	23 min
Dec 22, 4:56 PM EST	Special Weather Statement	FFC	Paulding	34 min
Dec 22, 5:13 PM EST	Severe Thunderstorm Warning	FFC	Gordon	32 min
Dec 22, 5:15 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Douglas, Fulton, Heard	45 min
Dec 22, 5:23 PM EST	Severe Thunderstorm Warning	FFC	Gilmer, Murray, Pickens	25 min
Dec 22, 5:29 PM EST	Special Weather Statement	FFC	Cherokee, Dawson, Forsyth, Pickens	31 min
Dec 22, 5:32 PM EST	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Meriwether, Troup	43 min
Dec 22, 5:36 PM EST	Special Weather Statement	FFC	Cobb	24 min
Dec 22, 5:40 PM EST	Special Weather Statement	FFC	Meriwether	35 min
Dec 22, 5:44 PM EST	Tornado Warning	FFC	Coweta, Fayette, Meriwether	46 min
Dec 22, 6:02 PM EST	Severe Thunderstorm Warning	FFC	Harris, Meriwether, Pike, Talbot, Upson	43 min
Dec 22, 6:08 PM EST	Special Weather Statement	FFC	DeKalb, Forsyth, Fulton, Gwinnett, Hall	37 min
Dec 22, 6:11 PM EST	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Henry, Pike, Spalding	49 min
Dec 22, 6:35 PM EST	Special Weather Statement	FFC	Marion, Schley, Taylor	25 min
Dec 22, 6:35 PM EST	Severe Thunderstorm Warning	FFC	Hall	27 min
Dec 22, 6:43 PM EST	Special Weather Statement	FFC	Lamar, Monroe, Upson	47 min
Dec 22, 6:58 PM EST	Special Weather Statement	FFC	Banks, Barrow, Clarke, Gwinnett, Jackson, Madison and 1 more	47 min

Nearby

Dense Fog Advisories in Georgia, 2011 Every dense fog advisory in 2011

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.