Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 175, NWS Atlanta, GA

April 16, 20117 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 16, 2011, 2:38 AM EDT for 7 counties in Georgia. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 16, 2011, 2:38 AM EDT (06:38 UTC)
Expired: Apr 16, 2011, 3:30 AM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Clayton County, GA, DeKalb County, GA, Fayette County, GA, Fulton County, GA, Henry County, GA, Newton County, GA, Rockdale County, GA

The radar

The Atlanta radar (KFFC), 37 km from the middle of the area, began a volume at 06:39 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 15, 9:12 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.6 hours before the alert went out and 32 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: 406 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 373 m²/s²
0-3 km storm-relative helicity: 566 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 11.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

684 
WUUS52 KFFC 160638
SVRFFC
GAC063-089-113-121-151-217-247-160730-
/O.NEW.KFFC.SV.W.0175.110416T0638Z-110416T0730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
238 AM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLAYTON COUNTY IN NORTH CENTRAL GEORGIA
  DEKALB COUNTY IN NORTH CENTRAL GEORGIA
  FAYETTE COUNTY IN NORTH CENTRAL GEORGIA
  SOUTH CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA
  HENRY COUNTY IN NORTH CENTRAL GEORGIA
  EXTREME WEST CENTRAL NEWTON COUNTY IN NORTH CENTRAL GEORGIA
  ROCKDALE COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 330 AM EDT

* AT 234 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  FAIRBURN TO TYRONE TO 6 MILES WEST OF PEACHTREE CITY TO 9 MILES
  SOUTHWEST OF PEACHTREE CITY...MOVING EAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO UNION
  CITY...COLLEGE PARK...HARTSFIELD-JACKSON AIRPORT...EAST POINT...
  RIVERDALE...HAPEVILLE...FAYETTEVILLE...FOREST PARK...ATLANTA...
  WOOLSEY...MIDTOWN...GRANT PARK-ZOO ATLANTA...MORROW...LAKE CITY...
  JONESBORO...DRUID HILLS...DECATUR...AVONDALE ESTATES...LOVEJOY...
  HAMPTON...STOCKBRIDGE...CLARKSTON...PINE LAKE...STONE MOUNTAIN...
  LITHONIA...MCDONOUGH...LAKEVIEW ESTATES AND CONYERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

&&

LAT...LON 3383 8436 3384 8414 3376 8404 3378 8398
      3365 8397 3357 8400 3352 8406 3349 8403
      3349 8400 3344 8398 3332 8452 3336 8459
      3344 8463 3350 8461 3352 8466 3363 8465
TIME...MOT...LOC 0638Z 252DEG 34KT 3360 8458 3349 8457
          3341 8464 3336 8468

$$

2 follow-up statements

297 
WWUS52 KFFC 160700
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
300 AM EDT SAT APR 16 2011

GAC063-089-113-121-151-217-247-160730-
/O.CON.KFFC.SV.W.0175.000000T0000Z-110416T0730Z/
ROCKDALE GA-NEWTON GA-DEKALB GA-FAYETTE GA-HENRY GA-CLAYTON GA-
FULTON GA-
300 AM EDT SAT APR 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EDT
FOR CENTRAL FULTON...CLAYTON...HENRY...EASTERN FAYETTE...DEKALB...
EXTREME WEST CENTRAL NEWTON AND ROCKDALE COUNTIES...

AT 257 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM GRESHAM PARK TO JONESBORO TO FAYETTEVILLE...MOVING EAST AT 40
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EAST 
LAKE...DECATUR...PANTHERSVILLE...SCOTTDALE...HAMPTON...STOCKBRIDGE...
STONE MOUNTAIN...LITHONIA...MCDONOUGH...CONYERS...MILSTEAD AND OLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

&&

LAT...LON 3373 8451 3383 8436 3384 8414 3376 8404
      3378 8398 3365 8397 3357 8400 3352 8406
      3349 8403 3349 8400 3344 8398 3332 8452
      3352 8454
TIME...MOT...LOC 0659Z 252DEG 34KT 3370 8433 3355 8434
          3347 8441 3342 8445

$$

617 
WWUS52 KFFC 160713
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
313 AM EDT SAT APR 16 2011

GAC113-121-160723-
/O.CAN.KFFC.SV.W.0175.000000T0000Z-110416T0730Z/
FAYETTE GA-FULTON GA-
313 AM EDT SAT APR 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON AND EASTERN
FAYETTE COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED OUT OF 
THE COUNTIES...THUS THE WARNING HAS BEEN CANCELLED.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

LAT...LON 3383 8435 3383 8414 3376 8404 3378 8398
      3365 8397 3356 8400 3352 8406 3348 8400
      3344 8398 3338 8427 3356 8424 3365 8428
      3366 8431
TIME...MOT...LOC 0713Z 252DEG 34KT 3374 8418 3359 8419
          3351 8426 3346 8430

$$

GAC063-089-151-217-247-160730-
/O.CON.KFFC.SV.W.0175.000000T0000Z-110416T0730Z/
ROCKDALE GA-NEWTON GA-DEKALB GA-HENRY GA-CLAYTON GA-
313 AM EDT SAT APR 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EDT
FOR EXTREME NORTHEASTERN CLAYTON...HENRY...SOUTHERN DEKALB...EXTREME
WEST CENTRAL NEWTON AND ROCKDALE COUNTIES...

AT 311 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM BELMONT TO HIDDEN VALLEY PARK TO EAGLES LANDING TO 7 MILES
SOUTHWEST OF EAGLES LANDING...MOVING EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STONE
MOUNTAIN...REDAN...KLONDIKE...ARABIA MOUNTAIN...LITHONIA...RICHARDSON
PARK...FLIPPEN...BLACKSVILLE...MCDONOUGH...LAKEVIEW ESTATES...
CONYERS...MILSTEAD...MAGNET...OLA AND KELLEYTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

&&

LAT...LON 3383 8435 3383 8414 3376 8404 3378 8398
      3365 8397 3356 8400 3352 8406 3348 8400
      3344 8398 3338 8427 3356 8424 3365 8428
      3366 8431
TIME...MOT...LOC 0713Z 252DEG 34KT 3374 8418 3359 8419
          3351 8426 3346 8430

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 8:02 PM EDT	Tornado Warning	FFC	Cobb, DeKalb, Fulton	43 min
Apr 15, 8:12 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Meriwether, Pike, Talbot, Upson	48 min
Apr 15, 8:19 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett	41 min
Apr 15, 8:28 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth, Hall	47 min
Apr 15, 8:45 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Paulding	45 min
Apr 15, 8:56 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Lamar, Monroe, Pike, Upson	49 min
Apr 15, 9:18 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe	42 min
Apr 15, 9:19 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Forsyth, Fulton, Gwinnett	41 min
Apr 15, 10:44 PM EDT	River Flood Warning	FFC	Forsyth, Fulton	40 hr
Apr 15, 11:44 PM EDT	River Flood Warning	FFC	Cobb	6 hr
Apr 16, 12:17 AM EDT	River Flood Warning	FFC	Forsyth	14 hr
Apr 16, 12:47 AM EDT	River Flood Warning	FFC	Dade	34 hr
Apr 16, 1:25 AM EDT	Severe Thunderstorm Warning	FFC	Heard, Troup	50 min
Apr 16, 1:40 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Carroll, Haralson, Paulding	50 min
Apr 16, 1:54 AM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Fulton, Meriwether	51 min
Apr 16, 2:10 AM EDT	Tornado Warning	FFC	Carroll, Cobb, Douglas, Fulton, Paulding	50 min
Apr 16, 2:46 AM EDT	Severe Thunderstorm Warning	FFC	Harris	44 min
Apr 16, 3:15 AM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	45 min
Apr 16, 3:26 AM EDT	Severe Thunderstorm Warning	FFC	Meriwether	49 min
Apr 16, 3:35 AM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	16 hr
Apr 16, 3:39 AM EDT	Tornado Warning	FFC	Harris, Talbot	36 min
Apr 16, 3:51 AM EDT	Severe Thunderstorm Warning	FFC	Lamar, Meriwether, Pike, Spalding	39 min
Apr 16, 4:04 AM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Pike, Talbot, Upson	26 min
Apr 16, 4:40 AM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Macon, Marion, Muscogee, Talbot	50 min
Apr 16, 4:45 AM EDT	Tornado Warning	FFC	Chattahoochee, Marion, Muscogee	45 min
Apr 16, 5:12 AM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Crawford, Marion, Talbot, Taylor, Upson	48 min
Apr 16, 5:48 AM EDT	Tornado Warning	FFC	Bibb, Crawford, Monroe, Taylor	42 min
Apr 16, 6:14 AM EDT	Tornado Warning	FFC	Baldwin, Jones, Putnam	46 min
Apr 16, 6:26 AM EDT	River Flood Warning	FFC	Whitfield	64 hr
Apr 16, 8:42 AM EDT	River Flood Warning	FFC	Cobb	7 hr
Apr 16, 10:34 AM EDT	River Flood Warning	FFC	Gordon, Murray, Whitfield	28 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2011 Every severe thunderstorm warning in 2011

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.