Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 2, NWS Atlanta, GA

January 11, 20208 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 11, 2020, 3:42 PM EST for 8 counties in Georgia. It was in force for 48 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 11, 2020, 3:42 PM EST (20:42 UTC)
Expired: Jan 11, 2020, 4:30 PM EST
In force: 48 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Floyd County, GA, Gordon County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 20:43 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.

What was reported inside it

Time	Report	Where	Remark
Jan 11, 4:22 PM EST	TSTM WND DMG	1 Nw Blackwood, GA	POST STORM SURVEY CAME BACK WITH AN ESTIMATE OF 40-50 TREES DOWN ACROSS THE COUNTY. SURVEY WAS COUNDUCTED BY COUNTY EM AND TIME IS INDICATED BY RADAR.
Jan 11, 4:30 PM EST	TSTM WND DMG	1 Se Shannon, GA	MULTIPLE TREES REPORTED DOWN ON A TREE FARM NEAR ROME GA. TIME INDICATED BY RADAR.
Jan 11, 4:30 PM EST	TSTM WND DMG	Taylorsville, GA	AMATUEUR RADIO REPORTS TOPS OF OINE TREES SNAPPED IN THE TAYLORSVILLE AREA.
Jan 11, 4:34 PM EST	TSTM WND DMG	1 Ne Adairsville, GA	TREES REPORTED DOWN ALONG I-75 NEAR MILE MARKER 309 NEAR ADAIRSVILLE GA. TIME IS INDICATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 11, 1:42 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.7 hours before the alert went out and 136 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: 13 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 417 m²/s²
0-3 km storm-relative helicity: 450 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

503 
WUUS52 KFFC 112042
SVRFFC
GAC015-047-055-115-129-213-295-313-112130-
/O.NEW.KFFC.SV.W.0002.200111T2042Z-200111T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
342 PM EST Sat Jan 11 2020

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Catoosa County in northwestern Georgia...
  Western Murray County in northwestern Georgia...
  Floyd County in northwestern Georgia...
  Whitfield County in northwestern Georgia...
  Eastern Walker County in northwestern Georgia...
  Western Gordon County in northwestern Georgia...
  Central Chattooga County in northwestern Georgia...
  Western Bartow County in northwestern Georgia...

* Until 430 PM EST.

* At 341 PM EST, severe thunderstorms were located along a line
  extending from Fairview to near Tidings to near Forney, moving
  northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Rome, Dalton, Calhoun, Lafayette, Summerville, Chatsworth,
  Ringgold, Fort Oglethorpe, Adairsville, Chickamauga, Trion,
  Varnell, Cave Spring, Tunnel Hill, Cohutta, Kingston, Resaca,
  Plainville, Taylorsville and Shannon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EST for northwestern
Georgia.

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across northwest Georgia. SEEK SHELTER NOW inside a 
sturdy structure and stay away from windows! If you see wind 
damage...hail or flooding...wait until the storm has passed...and 
then call the National Weather Service toll free at 1 8 6 6 7 6 3 4 
4 6 6 or tweet us your report at NWSATLANTA.

&&

LAT...LON 3499 8479 3459 8483 3408 8498 3410 8526
      3408 8526 3408 8542 3423 8545 3457 8531
      3499 8527
TIME...MOT...LOC 2041Z 242DEG 40KT 3493 8528 3441 8527 3406 8542 

HAIL...<.75IN
WIND...60MPH
 
$$

2 follow-up statements

173 
WWUS52 KFFC 112107
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
407 PM EST Sat Jan 11 2020

GAC015-047-055-115-129-213-295-313-112130-
/O.CON.KFFC.SV.W.0002.000000T0000Z-200111T2130Z/
Catoosa GA-Murray GA-Floyd GA-Whitfield GA-Walker GA-Gordon GA-
Chattooga GA-Bartow GA-
407 PM EST Sat Jan 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EST
FOR CATOOSA...WESTERN MURRAY...FLOYD...WHITFIELD...SOUTHEASTERN
WALKER...WESTERN GORDON...NORTHEASTERN CHATTOOGA AND WESTERN BARTOW
COUNTIES...

At 406 PM EST, severe thunderstorms were located along a line
extending from Collegedale to near Oostanaula to near Lindale, moving
northeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Rome, Dalton, Calhoun, Chatsworth, Ringgold, Adairsville, Varnell,
Cave Spring, Tunnel Hill, Cohutta, Kingston, Resaca, Plainville,
Taylorsville, Shannon, Pinson, Subligna, Lake Marvin, Beaverdale and
Coosa.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EST for northwestern
Georgia.

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage. SEEK SHELTER NOW inside a sturdy structure and stay 
away from windows.
 
&&

LAT...LON 3499 8479 3459 8483 3408 8498 3410 8526
      3408 8526 3408 8542 3421 8540 3456 8523
      3499 8514
TIME...MOT...LOC 2106Z 241DEG 40KT 3503 8505 3451 8504 3416 8524 

HAIL...<.75IN
WIND...60MPH
 
$$

691 
WWUS52 KFFC 112124
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
424 PM EST Sat Jan 11 2020

GAC015-047-055-115-129-213-295-313-112133-
/O.EXP.KFFC.SV.W.0002.000000T0000Z-200111T2130Z/
Catoosa GA-Murray GA-Floyd GA-Whitfield GA-Walker GA-Gordon GA-
Chattooga GA-Bartow GA-
424 PM EST Sat Jan 11 2020

...THE SEVERE THUNDERSTORM WARNING FOR CATOOSA...WESTERN MURRAY...
FLOYD...WHITFIELD...SOUTHEASTERN WALKER...WESTERN GORDON...
NORTHEASTERN CHATTOOGA AND WESTERN BARTOW COUNTIES WILL EXPIRE AT 430
PM EST...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However, a new 
warning has been issued just downstream 

A Tornado Watch remains in effect until 900 PM EST for northwestern
Georgia.

LAT...LON 3499 8479 3459 8483 3408 8498 3410 8526
      3408 8526 3408 8542 3421 8540 3456 8523
      3499 8514
TIME...MOT...LOC 2123Z 242DEG 40KT 3510 8489 3458 8488 3423 8508 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 11, 10:28 AM EST	High Wind Warning	FFC	Catoosa, Chattooga, Dade, Dawson, Fannin, Floyd and 10 more	11 hr
Jan 11, 3:00 PM EST	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Floyd, Walker, Whitfield	45 min
Jan 11, 3:53 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Polk	52 min
Jan 11, 4:16 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Heard	44 min
Jan 11, 4:19 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Fannin, Gilmer, Gordon, Murray and 3 more	41 min
Jan 11, 4:47 PM EST	Severe Thunderstorm Warning	FFC	Chattahoochee, Coweta, Harris, Heard, Meriwether, Muscogee and 2 more	43 min
Jan 11, 4:51 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Carroll, Cherokee, Clayton, Cobb, Douglas and 2 more	39 min
Jan 11, 4:53 PM EST	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Lumpkin, Pickens, Union	52 min
Jan 11, 5:02 PM EST	Tornado Warning	FFC	Harris, Muscogee	28 min
Jan 11, 5:24 PM EST	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Fayette, Forsyth, Fulton, Gwinnett and 1 more	51 min
Jan 11, 5:27 PM EST	Severe Thunderstorm Warning	FFC	Dawson, Hall, Lumpkin, Towns, Union, White	48 min
Jan 11, 5:29 PM EST	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Fayette, Harris, Henry, Lamar and 5 more	46 min
Jan 11, 5:34 PM EST	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion, Stewart, Talbot	41 min
Jan 11, 5:57 PM EST	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion, Stewart, Webster	48 min
Jan 11, 6:08 PM EST	Severe Thunderstorm Warning	FFC	Crawford, Lamar, Monroe, Taylor, Upson	52 min
Jan 11, 6:10 PM EST	Severe Thunderstorm Warning	FFC	Banks, Barrow, Gwinnett, Hall, Jackson, Walton	50 min
Jan 11, 6:12 PM EST	Severe Thunderstorm Warning	FFC	Butts, DeKalb, Henry, Jasper, Newton, Rockdale and 2 more	48 min
Jan 11, 6:17 PM EST	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion, Taylor	43 min
Jan 11, 6:41 PM EST	Severe Thunderstorm Warning	FFC	Macon, Marion, Schley, Sumter, Taylor, Webster	34 min
Jan 11, 6:45 PM EST	Special Weather Statement	FFC	Clarke, Greene, Madison, Morgan, Oconee, Oglethorpe	45 min
Jan 11, 6:49 PM EST	Special Weather Statement	FFC	Baldwin, Jasper, Jones, Putnam	41 min
Jan 11, 6:52 PM EST	Severe Thunderstorm Warning	FFC	Jasper, Morgan, Putnam	38 min
Jan 11, 6:58 PM EST	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Houston, Peach, Taylor, Twiggs	47 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2020 Every severe thunderstorm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.