Alert archive / Georgia / Dense Fog Advisories in 2021

Dense Fog Advisory 2, NWS Tallahassee, FL

February 10, 202116 counties in Florida; 26 counties in Georgia; 5 counties in Alabama

NWS Tallahassee, FL issued this dense fog advisory at Feb 10, 2021, 2:06 PM CST for 16 counties in Florida; 26 counties in Georgia; 5 counties in Alabama. It took effect at Feb 10, 2021, 6:00 PM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Feb 10, 2021, 2:06 PM CST (20:06 UTC)
In effect from: Feb 10, 2021, 6:00 PM CST
Expired: Feb 11, 2021, 9:00 AM CST
In force: 15 hr
Issued by: NWS Tallahassee, FL

All 47 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lee County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 66 km from the middle of the area, began a volume at 20:06 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.1 hours before the alert went out and 66 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: 84 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 473 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Tallahassee, FL wrote its last area forecast discussion before this dense fog advisory went out at Feb 10, 11:34 AM CST, 2 hours 32 minutes earlier.

Area forecast discussion, Feb 10, 11:34 AM CST, 2 hours 32 minutes before

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In the hours before

Special weather statement, Feb 10, 1:58 PM CST, 8 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
158 PM CST Wed Feb 10 2021

FLZ007>009-108-102100-
Central Walton FL-Holmes FL-South Walton FL-North Walton FL-
158 PM CST Wed Feb 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR WALTON AND SOUTHWESTERN HOLMES
COUNTIES UNTIL 300 PM CST...

At 156 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Crestview to 10 miles northwest of
Niceville to near Wright. Movement was east at 30 mph.

Pea size hail and winds up to 40 mph will be possible with these
storms.

Locations impacted include...
De Funiak Springs, Eglin Air Force Base, Union, Liberty, Freeport,
Ponce De Leon, Pond Creek, Oakwood Hills, Cluster Springs, Portland,
Alpine Heights, Villa Tasso, Arrant Settlement, De Funiak Spring
Airport, Rock Hill, Glendale, Pleasant Ridge, Center Ridge, Knox Hill
and New Harmony.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3094 8639 3093 8592 3060 8594 3041 8603
      3042 8614 3043 8612 3043 8615 3044 8616
      3046 8616 3047 8613 3046 8619 3048 8620
      3049 8619 3050 8620 3048 8622 3049 8626
      3047 8630 3048 8633 3046 8639
TIME...MOT...LOC 1956Z 274DEG 24KT 3082 8656 3064 8656 3049 8668

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 10, 1:58 PM CST	Special Weather Statement	TAE	Walton	62 min
Feb 10, 2:49 PM CST	Special Weather Statement	TAE	Washington	56 min

Nearby

Dense Fog Advisories in Georgia, 2021 Dense Fog Advisories in Florida, 2021 Dense Fog Advisories in Alabama, 2021 Every 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.