Alert archive / Georgia / Dense Fog Advisories in 2021
Dense Fog Advisory 2, NWS Atlanta, GA
NWS Atlanta, GA issued this dense fog advisory at Jan 2, 2021, 12:44 AM EST for 26 counties in Georgia. It took effect at Jan 2, 2021, 1:00 AM EST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jan 2, 2021, 12:44 AM EST (05:44 UTC)
- In effect from
- Jan 2, 2021, 1:00 AM EST
- Expired
- Jan 2, 2021, 10:00 AM EST
- In force
- 9 hr
- Issued by
- NWS Atlanta, GA
All 26 counties
Banks County, GA, Barrow County, GA, Cherokee County, GA, Clarke County, GA, Dawson County, GA, DeKalb County, GA, Forsyth County, GA, Fulton County, GA, Greene County, GA, Gwinnett County, GA, Hall County, GA, Jackson County, GA, Jasper County, GA, Lumpkin County, GA, Madison County, GA, Morgan County, GA, Newton County, GA, Oconee County, GA, Oglethorpe County, GA, Pickens County, GA, Putnam County, GA, Rockdale County, GA, Taliaferro County, GA, Walton County, GA, White County, GA, Wilkes County, GA
The radar
The Atlanta radar (KFFC), 103 km from the middle of the area, began a volume at 05:48 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, 5.7 hours before the alert went out and 98 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.
- Mixed-layer CAPE
- 4 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
388 WWUS72 KFFC 020544 NPWFFC URGENT - WEATHER MESSAGE National Weather Service Peachtree City GA 1244 AM EST Sat Jan 2 2021 GAZ013>016-021>025-027-033>039-045>051-059-060-021345- /O.NEW.KFFC.FG.Y.0002.210102T0600Z-210102T1500Z/ Pickens-Dawson-Lumpkin-White-Cherokee-Forsyth-Hall-Banks-Jackson- Madison-North Fulton-Gwinnett-Barrow-Clarke-Oconee-Oglethorpe- Wilkes-DeKalb-Rockdale-Walton-Newton-Morgan-Greene-Taliaferro- Jasper-Putnam- Including the cities of Dahlonega, Cleveland, Gainesville, Atlanta, Lawrenceville, Athens, Decatur, Conyers, and Covington 1244 AM EST Sat Jan 2 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter to one half mile in dense fog. * WHERE...Portions of northeast Georgia. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 7:11 PM EST | Special Weather Statement | FFC | Montgomery, Toombs | 34 min |
| Jan 1, 7:18 PM EST | Special Weather Statement | FFC | Emanuel | 27 min |
| Jan 2, 11:17 AM EST | Flash Flood Watch | FFC | Baldwin, Bibb, Bleckley, Crisp, Dodge, Dooly and 26 more | 11 hr |
| Jan 2, 6:51 PM EST | Special Weather Statement | FFC | Telfair, Wheeler | 24 min |
Nearby
Dense Fog Advisories in Georgia, 2021Every dense fog advisory in 2021
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.