Alert archive / Georgia / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 7, NWS Atlanta, GA

January 11, 20208 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 11, 2020, 4:51 PM EST for 8 counties in Georgia. It was in force for 39 min. 11 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, 4:51 PM EST (21:51 UTC)
Expired: Jan 11, 2020, 5:30 PM EST
In force: 39 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bartow County, GA, Carroll County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Douglas County, GA, Fulton County, GA, Paulding County, GA

The radar

The Atlanta radar (KFFC), 60 km from the middle of the area, began a volume at 21:50 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, 4:52 PM EST	TORNADO	2 N Hiram, GA	AN EF-0 TORNADO BEGAN NEAR MACLAND RD WEST OF HIRAM-ACWORTH HIGHWAY AND TRAVLED ENE FOR NEARLY 4 MILES INTO WESTERN COBB COUNTY. ONE HOME SUFFERED DAMAGE WHEN A LARGE TREE FELL ON IT. NUMEROUS TREES WERE UPROOTED OR SNAPPED ALONG THE PATH.
Jan 11, 4:52 PM EST	TORNADO	2 N Hiram, GA	AN EF-0 TORNADO BEGAN NEAR MACLAND RD WEST OF HIRAM-ACWORTH HIGHWAY IN PAULDING COUNTY AND TRAVELED ENE FOR NEARLY 4 MILES INTO WESTERN COBB COUNTY. DOZENS OF TREES WERE DOWNED ALONG THE PATH, ONE OF WHICH FELL ONTO A HOME.
Jan 11, 4:57 PM EST	TSTM WND DMG	1 Se Brownsville, GA	TREE DOWN BLOCKING ROADWAY IN THE 200 BLOCK OF HUNTER ROAD.
Jan 11, 4:59 PM EST	TSTM WND DMG	1 N Chapel Hill, GA	A TREE WAS REPORTED DOWN NEAR THE INTERSECTION OF CHAPEN HILL AND WINDING TRAIL DR. TIME INDICATED BY RADAR.
Jan 11, 5:00 PM EST	TSTM WND DMG	1 Nw Douglasville, GA	TREES WERE REPORTED DOWN NEAR THE INTERSECTION OF CAVE SPRINGS RD AND WOODCREEK. TIME IS INDICATED BY RADAR.
Jan 11, 5:10 PM EST	TSTM WND DMG	Flagview Mobile Home Pa, GA	A POWER LINE WAS REPORTED DOWN ON THE 3900TH BLOCK OF ST DOUGLAS COURT. TIME INDICATED BY RADAR.
Jan 11, 5:15 PM EST	TSTM WND DMG	2 N Kennesaw State Univ, GA	TREES DOWN NEAR THE INTERSECTION OF NORTH FORK AND WADE GREEN NEAR KSU. TIME INDICATED BY RADAR.
Jan 11, 5:21 PM EST	TSTM WND DMG	2 Nnw Hiram, GA	TREES WERE REPORTED DOWN NEAR THE INTERSECTION OF HIGHLAND FALLS AND HIGHWAY 278 NEAR HIRAM GA. TIME INDICATED BY RADAR.
Jan 11, 5:27 PM EST	TSTM WND DMG	Cascade Heights, GA	TREE DOWN ON A POWERLINE ON VENETIAN DRIVE NEAR CASCADE ELEMENTARY. REPORT RELAYED BY 11 ALIVE TV.
Jan 11, 5:32 PM EST	TSTM WND DMG	2 Sse Hobgood Park, GA	A TREE WAS REPORTED DOWN ON A STRUCTURE NEAR THE INTERSECTION OF ATHERTON LN AND EAGLE DR. TIME INDICATED BY RADAR.
Jan 11, 5:32 PM EST	TSTM WND DMG	3 Nne Chapel Hill, GA	A POWER LINE WAS REPORTED DOWN ACROSS THE ROAD NEAR THE INTERSECTION OF BOMAR RD AND CREEKSIDE. TIME 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, 9.9 hours before the alert went out and 59 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.

911 
WUUS52 KFFC 112151
SVRFFC
GAC015-045-057-063-067-097-121-223-112230-
/O.NEW.KFFC.SV.W.0007.200111T2151Z-200111T2230Z/

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

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Paulding County in northwestern Georgia...
  Cherokee County in north central Georgia...
  Cobb County in north central Georgia...
  East central Carroll County in northwestern Georgia...
  Douglas County in north central Georgia...
  Fulton County in north central Georgia...
  Northwestern Clayton County in north central Georgia...
  Southeastern Bartow County in northwestern Georgia...

* Until 530 PM EST.

* At 450 PM EST, severe thunderstorms were located along a line
  extending from Salacoa Valley to Whitesburg, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Atlanta, Marietta, Douglasville, Canton, Sandy Springs, Roswell,
  Alpharetta, Smyrna, East Point, Milton, Kennesaw, Woodstock,
  Acworth, Union City, Forest Park, Riverdale, College Park, Powder
  Springs, Fairburn and Holly Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 900 PM EST for north central,
northwestern and west central Georgia.

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

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 3412 8471 3438 8457 3438 8426 3412 8426
      3397 8435 3366 8435 3356 8437 3355 8447
      3351 8462 3351 8492
TIME...MOT...LOC 2150Z 273DEG 39KT 3438 8459 3351 8492 

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

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, 3:42 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Catoosa, Chattooga, Floyd, Gordon, Murray and 2 more	48 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, 4:53 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.