Alert archive / Georgia / Dense Fog Advisories in 2017

Dense Fog Advisory 4, NWS Atlanta, GA

June 16, 201727 counties in Georgia

NWS Atlanta, GA issued this dense fog advisory at Jun 16, 2017, 2:20 AM EDT for 27 counties in Georgia. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jun 16, 2017, 2:20 AM EDT (06:20 UTC)
Expired: Jun 16, 2017, 9:00 AM EDT
In force: 7 hr
Issued by: NWS Atlanta, GA

All 27 counties

Banks County, GA, Barrow County, GA, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Clarke County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Hall County, GA, Haralson County, GA, Jackson County, GA, Lumpkin County, GA, Madison County, GA, Murray County, GA, Pickens County, GA, Polk County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 122 km from the middle of the area, began a volume at 06:24 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, 6.3 hours before the alert went out and 120 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1575 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -88 m²/s²
0-3 km storm-relative helicity: -22 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 Jun 16, 2:09 AM EDT, 11 minutes earlier.

Area forecast discussion, Jun 16, 2:09 AM EDT, 11 minutes before

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Hazardous weather outlook, Jun 15, 11:44 PM EDT, 2 hours 36 minutes before

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In the hours before

Local storm report, Jun 15, 10:50 PM EDT, 3 hours 30 minutes before

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Local storm report, Jun 15, 11:05 PM EDT, 3 hours 15 minutes before

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Special weather statement, Jun 15, 11:12 PM EDT, 3 hours 8 minutes before

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Local storm report, Jun 15, 11:15 PM EDT, 3 hours 5 minutes before

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Local storm report, Jun 15, 11:19 PM EDT, 3 hours 1 minute before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jun 15, 11:36 PM EDT, 2 hours 44 minutes before

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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 8:15 PM EDT	Special Weather Statement	FFC	Dooly	30 min
Jun 15, 8:16 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	29 min
Jun 15, 8:22 PM EDT	Special Weather Statement	FFC	Putnam	23 min
Jun 15, 8:38 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Houston, Macon	37 min
Jun 15, 8:41 PM EDT	Special Weather Statement	FFC	Sumter	64 min
Jun 15, 9:04 PM EDT	Severe Thunderstorm Warning	FFC	Houston	41 min
Jun 15, 9:05 PM EDT	Special Weather Statement	FFC	Peach	25 min
Jun 15, 9:08 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Washington	52 min
Jun 15, 9:36 PM EDT	Special Weather Statement	FFC	Twiggs	24 min
Jun 15, 9:37 PM EDT	Severe Thunderstorm Warning	FFC	Houston, Twiggs	33 min
Jun 15, 10:10 PM EDT	Special Weather Statement	FFC	Wilkinson	35 min
Jun 15, 10:37 PM EDT	Special Weather Statement	FFC	Washington	23 min
Jun 15, 11:12 PM EDT	Special Weather Statement	FFC	Jefferson	33 min

Nearby

Dense Fog Advisories in Georgia, 2017 Every dense fog advisory in 2017

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.