Alert archive / Georgia / Freeze Warnings in 2021

Freeze Warning 4, NWS Atlanta, GA

November 6, 2021Fannin County, Towns County, Union County, Georgia

NWS Atlanta, GA issued this freeze warning at Nov 6, 2021, 2:46 PM EDT for Fannin County, Towns County, Union County, Georgia. It took effect at Nov 7, 2021, 4:00 AM EST. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 6, 2021, 2:46 PM EDT (18:46 UTC)
In effect from
Nov 7, 2021, 4:00 AM EST
Expired
Nov 7, 2021, 9:00 AM EST
In force
5 hr
Issued by
NWS Atlanta, GA

Counties Fannin County, GA, Towns County, GA, Union County, GA

The radar

The Knoxville radar (KMRX), 155 km from the middle of the area, began a volume at 18:48 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 12:00Z, 6.8 hours before the alert went out and 173 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2021-11-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2021-11-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1459 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

363 
WWUS72 KFFC 061846
NPWFFC

URGENT - WEATHER MESSAGE
National Weather Service Peachtree City GA
246 PM EDT Sat Nov 6 2021

GAZ006-008-009-070400-
/O.UPG.KFFC.FZ.A.0005.211107T0900Z-211107T1300Z/
/O.NEW.KFFC.FZ.W.0004.211107T0900Z-211107T1400Z/
Fannin-Union-Towns-
246 PM EDT Sat Nov 6 2021

...FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EST SUNDAY...

* WHAT...Subfreezing temperatures as low as 30 degrees are 
  expected.

* WHERE...Fannin, Union and Towns County in north Georgia.

* WHEN...late tonight and early Sunday morning, between 4 AM and 9
  AM.

* IMPACTS...Temperatures at or below freezing for several hours
  could kill crops, other sensitive vegetation, and possibly 
  damage unprotected outdoor plumbing. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ001>005-007-011>016-019>021-030>032-041>043-052-053-066-067-
070400-
/O.NEW.KFFC.FR.Y.0007.211107T0800Z-211107T1400Z/
Dade-Walker-Catoosa-Whitfield-Murray-Gilmer-Chattooga-Gordon-
Pickens-Dawson-Lumpkin-White-Floyd-Bartow-Cherokee-Polk-Paulding-
Cobb-Haralson-Carroll-Douglas-Heard-Coweta-Troup-Meriwether-
Including the cities of Calhoun, Dahlonega, Cleveland, Rome, 
Cartersville, Marietta, Carrollton, Douglasville, and Newnan
246 PM EDT Sat Nov 6 2021

...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM EST SUNDAY...

* WHAT...Temperatures dropping to the mid 30s will result in areas
  of frost.

* WHERE...Much of west-central and northwest Georgia.

* WHEN...Late tonight into early Sunday morning.

* IMPACTS...Frost could kill or damage sensitive outdoor
  vegetation if left unprotected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
1 follow-up statement
601 
WWUS72 KFFC 070838
NPWFFC

URGENT - WEATHER MESSAGE
National Weather Service Peachtree City GA
338 AM EST Sun Nov 7 2021

GAZ006-008-009-071400-
/O.CON.KFFC.FZ.W.0004.211107T0900Z-211107T1400Z/
Fannin-Union-Towns-
338 AM EST Sun Nov 7 2021

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EST THIS MORNING...

* WHAT...Subfreezing temperatures in the upper 20s to low 30s are
  expected.

* WHERE...Fannin, Union and Towns County in north Georgia.

* WHEN...Until 9 AM this morning.

* IMPACTS...Temperatures at or below freezing for several hours 
  could kill crops, other sensitive vegetation, and possibly 
  damage unprotected outdoor plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

GAZ001>005-007-011>016-019>021-030>032-041>043-052-053-066-067-
071400-
/O.CON.KFFC.FR.Y.0007.000000T0000Z-211107T1400Z/
Dade-Walker-Catoosa-Whitfield-Murray-Gilmer-Chattooga-Gordon-
Pickens-Dawson-Lumpkin-White-Floyd-Bartow-Cherokee-Polk-Paulding-
Cobb-Haralson-Carroll-Douglas-Heard-Coweta-Troup-Meriwether-
Including the cities of Calhoun, Dahlonega, Cleveland, Rome, 
Cartersville, Marietta, Carrollton, Douglasville, and Newnan
338 AM EST Sun Nov 7 2021

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EST THIS MORNING...

* WHAT...Temperatures dropping to the mid 30s will result in 
  areas of frost.

* WHERE...Much of west-central and northwest Georgia.

* WHEN...Until 9 AM this morning.

* IMPACTS...Frost could kill or damage sensitive outdoor 
  vegetation if left unprotected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 6, 4:14 AM EDTFreeze WatchFFCFannin, Towns, Union11 hr
Nov 6, 6:21 AM EDTDense Fog AdvisoryFFCBartow, Catoosa, Chattooga, Dade, Fannin, Floyd and 5 more4 hr
Nov 6, 2:46 PM EDTFrost AdvisoryFFCBartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 19 more19 hr

Nearby

Freeze Warnings in Georgia, 2021Every freeze warning 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.