Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 75, NWS Atlanta, GA

March 26, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 26, 2011, 10:30 PM EDT for 4 counties in Georgia. It was in force for 60 min. 3 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: Mar 26, 2011, 10:30 PM EDT (02:30 UTC)
Expired: Mar 26, 2011, 11:30 PM EDT
In force: 60 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Cobb County, GA, DeKalb County, GA, Fulton County, GA, Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 75 km from the middle of the area, began a volume at 02:30 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
Mar 26, 10:51 PM EDT	HAIL 1	Marietta, GA
Mar 26, 11:25 PM EDT	HAIL 1	Lawrenceville, GA	PUBLIC REPORTS QUARTER SIZED HAIL IN LAWRENCEVILLE.
Mar 26, 11:32 PM EDT	HAIL 1	Lawrenceville, GA	PUBLIC REPORTS QUARTER SIZED HAIL IN LAWRENCEVILLE.

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
Mar 26, 8:47 PM EDT	Tornado Watch	SPC	7 hr
Mar 26, 9:19 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.5 hours before the alert went out and 72 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: 120 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 635 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 343 m²/s²
0-3 km storm-relative helicity: 404 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

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

641 
WUUS52 KFFC 270230
SVRFFC
GAC067-089-121-135-270330-
/O.NEW.KFFC.SV.W.0075.110327T0230Z-110327T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1030 PM EDT SAT MAR 26 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA
  DEKALB COUNTY IN NORTH CENTRAL GEORGIA
  NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA
  GWINNETT COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 1130 PM EDT

* AT 1028 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR
  MARIETTA...MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SMYRNA...MOUNTAIN PARK...ROSWELL...SANDY SPRINGS...ALPHARETTA...
  BUCKHEAD...DUNWOODY...MIDTOWN...CHAMBLEE...DRUID HILLS...
  DORAVILLE...DECATUR...JOHNS CREEK...NORCROSS...AVONDALE ESTATES...
  BERKELEY LAKE...CLARKSTON...TUCKER...DULUTH...PINE LAKE...
  LILBURN...STONE MOUNTAIN...SUWANEE...LITHONIA...LAWRENCEVILLE...
  SNELLVILLE...GRAYSON AND DACULA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING QUARTER SIZED HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

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 400 AM EDT SUNDAY MORNING FOR
GEORGIA.

&&

LAT...LON 3383 8466 3406 8445 3407 8442 3411 8441
      3413 8436 3410 8421 3406 8415 3405 8410
      3407 8412 3407 8410 3402 8386 3395 8381
      3383 8392 3373 8406 3367 8409
TIME...MOT...LOC 0230Z 287DEG 41KT 3400 8459

$$

2 follow-up statements

767 
WWUS52 KFFC 270304
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1104 PM EDT SAT MAR 26 2011

GAC067-089-121-135-270330-
/O.CON.KFFC.SV.W.0075.000000T0000Z-110327T0330Z/
COBB GA-DEKALB GA-GWINNETT GA-FULTON GA-
1104 PM EDT SAT MAR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR CENTRAL FULTON...GWINNETT...DEKALB AND SOUTHEASTERN COBB
COUNTIES...

AT 1101 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
BROOKHAVEN...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DECATUR...MECHANICSVILLE...SCOTTDALE...AVONDALE ESTATES...NORCROSS...
CLARKSTON...JOHNS CREEK...TUCKER...BERKELEY LAKE...PINE LAKE...
DULUTH...STONE MOUNTAIN...LILBURN...PLEASANT HILL...BELMONT...
MOUNTAIN PARK...SUWANEE...REDAN...LITHONIA...CENTERVILLE...
SNELLVILLE...LAWRENCEVILLE...GRAYSON...ROSEBUD...HARBIN AND DACULA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 400 AM EDT SUNDAY MORNING FOR
GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 500 AM EDT
SUNDAY MORNING FOR NORTHERN GEORGIA.

&&

LAT...LON 3400 8444 3403 8436 3406 8415 3405 8410
      3407 8412 3407 8410 3402 8386 3400 8387
      3395 8381 3383 8392 3373 8406 3367 8409
      3380 8453
TIME...MOT...LOC 0304Z 282DEG 41KT 3386 8429

$$

170 
WWUS52 KFFC 270320
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1120 PM EDT SAT MAR 26 2011

GAC067-121-270330-
/O.CAN.KFFC.SV.W.0075.000000T0000Z-110327T0330Z/
COBB GA-FULTON GA-
1120 PM EDT SAT MAR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON AND
SOUTHEASTERN COBB COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS EXITED THESE COUNTIES.

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 400 AM EDT SUNDAY MORNING FOR
GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 500 AM EDT
SUNDAY MORNING FOR NORTHERN GEORGIA.

LAT...LON 3402 8386 3400 8387 3395 8381 3383 8392
      3374 8406 3367 8409 3376 8433 3392 8426
      3406 8405
TIME...MOT...LOC 0320Z 282DEG 41KT 3382 8408

$$

GAC089-135-270330-
/O.CON.KFFC.SV.W.0075.000000T0000Z-110327T0330Z/
DEKALB GA-GWINNETT GA-
1120 PM EDT SAT MAR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR GWINNETT AND DEKALB COUNTIES...

AT 1117 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZED HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS
STORM WAS LOCATED NEAR MOUNTAIN PARK...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CENTERVILLE...SNELLVILLE...LAWRENCEVILLE...GRAYSON...ROSEBUD...DACULA
AND HARBIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 400 AM EDT SUNDAY MORNING FOR
GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 500 AM EDT
SUNDAY MORNING FOR NORTHERN GEORGIA.

&&

LAT...LON 3402 8386 3400 8387 3395 8381 3383 8392
      3374 8406 3367 8409 3376 8433 3392 8426
      3406 8405
TIME...MOT...LOC 0320Z 282DEG 41KT 3382 8408

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 8:00 PM EDT	Tornado Warning	FFC	Bibb, Crawford, Houston, Peach, Twiggs, Wilkinson	45 min
Mar 26, 8:14 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Schley, Stewart, Sumter, Webster	46 min
Mar 26, 8:23 PM EDT	Severe Thunderstorm Warning	FFC	Floyd, Polk	43 min
Mar 26, 8:25 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga, Dade, Walker	50 min
Mar 26, 8:25 PM EDT	Tornado Warning	FFC	Stewart, Sumter, Webster	50 min
Mar 26, 8:39 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Murray	51 min
Mar 26, 8:53 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Gordon	52 min
Mar 26, 9:14 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Lumpkin, Union	46 min
Mar 26, 9:20 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens, Wilkinson	40 min
Mar 26, 9:28 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Gilmer, Pickens	47 min
Mar 26, 9:37 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd	38 min
Mar 26, 9:44 PM EDT	Severe Thunderstorm Warning	FFC	Hall, White	46 min
Mar 26, 9:44 PM EDT	Tornado Warning	FFC	Emanuel, Johnson, Laurens	46 min
Mar 26, 10:08 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Paulding, Polk	52 min
Mar 26, 10:09 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Fulton, Henry	25 min
Mar 26, 10:22 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth, Hall, Jackson	38 min
Mar 26, 10:41 PM EDT	Severe Thunderstorm Warning	FFC	Haralson, Polk	49 min
Mar 26, 11:13 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, DeKalb, Henry, Newton, Oconee, Rockdale and 1 more	47 min
Mar 26, 11:56 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Douglas, Fulton	34 min
Mar 27, 1:38 AM EDT	Severe Thunderstorm Warning	FFC	Heard, Troup	52 min
Mar 27, 2:15 AM EDT	River Flood Warning	FFC	Forsyth, Fulton	29 hr
Mar 27, 3:00 AM EDT	Tornado Warning	FFC	Meriwether, Talbot, Troup, Upson	45 min
Mar 27, 3:55 AM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Lamar, Monroe, Peach, Upson	50 min
Mar 27, 6:08 AM EDT	Severe Thunderstorm Warning	FFC	Hall, Jackson	37 min
Mar 27, 6:22 AM EDT	Severe Thunderstorm Warning	FFC	Greene, Hancock, Taliaferro, Warren	38 min
Mar 27, 7:33 AM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Meriwether, Pike, Spalding	27 min
Mar 27, 7:38 AM EDT	River Flood Warning	FFC	Whitfield	46 hr
Mar 27, 10:30 AM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Talbot, Upson	30 min
Mar 27, 10:33 AM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Monroe	42 min
Mar 27, 10:57 AM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Monroe, Upson	48 min
Mar 27, 12:48 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Laurens	42 min
Mar 27, 1:14 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Treutlen	46 min
Mar 27, 1:38 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Stewart	37 min
Mar 27, 2:01 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Laurens, Montgomery, Toombs, Treutlen, Wheeler	44 min
Mar 27, 2:22 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Schley, Sumter, Webster	53 min
Mar 27, 2:32 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Pulaski	43 min
Mar 27, 2:52 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge	53 min
Mar 27, 3:01 PM EDT	Severe Thunderstorm Warning	FFC	Laurens, Montgomery, Treutlen, Wheeler	59 min
Mar 27, 3:11 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Dooly	49 min
Mar 27, 3:34 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Wilcox	56 min
Mar 27, 3:51 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Montgomery, Telfair, Toombs, Wheeler	54 min
Mar 27, 4:26 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Telfair, Wilcox	25 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.