Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 20, NWS Atlanta, GA

February 28, 20115 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 28, 2011, 5:49 PM EST for 5 counties in Georgia. It was in force for 41 min. 1 report 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: Feb 28, 2011, 5:49 PM EST (22:49 UTC)
Expired: Feb 28, 2011, 6:30 PM EST
In force: 41 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Carroll County, GA, Cobb County, GA, Douglas County, GA, Fulton County, GA, Paulding County, GA

The radar

The Atlanta radar (KFFC), 41 km from the middle of the area, began a volume at 22:50 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
Feb 28, 5:52 PM EST	HAIL 1	4 Sse Smyrna, GA	PUBLIC REPORTED QUARTER SIZED HAIL.

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
Feb 28, 1:29 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.8 hours before the alert went out and 42 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 350 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

069 
WUUS52 KFFC 282249
SVRFFC
GAC045-067-097-121-223-282330-
/O.NEW.KFFC.SV.W.0020.110228T2249Z-110228T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
549 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN COBB COUNTY IN NORTH CENTRAL GEORGIA
  DOUGLAS COUNTY IN NORTH CENTRAL GEORGIA
  CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA
  NORTHEASTERN CARROLL COUNTY IN NORTHWEST GEORGIA
  SOUTHEASTERN PAULDING COUNTY IN NORTHWEST GEORGIA

* UNTIL 630 PM EST

* AT 545 PM EST...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 VILLA
  RICA...MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  DOUGLASVILLE...LITHIA SPRINGS...AUSTELL...COLLEGE PARK...EAST
  POINT...HAPEVILLE...ATLANTA...MIDTOWN...BUCKHEAD AND GRANT 
  PARK-ZOO ATLANTA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

&&

LAT...LON 3377 8502 3378 8490 3381 8481 3387 8435
      3365 8435 3365 8444 3365 8446 3361 8446
      3359 8501
TIME...MOT...LOC 2248Z 266DEG 46KT 3369 8489

$$

2 follow-up statements

148 
WWUS52 KFFC 282309
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
609 PM EST MON FEB 28 2011

GAC045-067-223-282316-
/O.CAN.KFFC.SV.W.0020.000000T0000Z-110228T2330Z/
CARROLL GA-PAULDING GA-COBB GA-
609 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN COBB...SOUTHEASTERN 
PAULDING AND NORTHEASTERN CARROLL COUNTIES HAS BEEN CANCELLED...

MODERATE RAIN AND OCCASIONAL CLOUD-TO-GROUND LIGHTNING WILL CONTINUE 
IN THESE AREAS FOR ANOTHER HOUR OR SO.

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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR NORTHERN GEORGIA.

LAT...LON 3376 8490 3374 8458 3387 8436 3365 8435
      3365 8446 3361 8446 3361 8451 3359 8483
      3360 8490 3374 8491
TIME...MOT...LOC 2306Z 266DEG 46KT 3370 8461

$$

GAC097-121-282330-
/O.CON.KFFC.SV.W.0020.000000T0000Z-110228T2330Z/
DOUGLAS GA-FULTON GA-
609 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EST
FOR CENTRAL FULTON AND DOUGLAS COUNTIES...

AT 604 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SEVERE THUNDERSTORMS FROM ATLANTA...TO CHAPEL 
HILL...TO CAMPBELLTON MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SANDTOWN...CASCADE HEIGHTS...COLLEGE PARK...BANKHEAD...EAST POINT...
HAPEVILLE...WEST END...LAKEWOOD PARK...ATLANTIC STATION...TURNER
FIELD...ATLANTA...MIDTOWN...SWEET AUBURN...BUCKHEAD...GRANT PARK-ZOO
ATLANTA AND PIEDMONT PARK.

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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR NORTHERN GEORGIA.

&&

LAT...LON 3376 8490 3374 8458 3387 8436 3365 8435
      3365 8446 3361 8446 3361 8451 3359 8483
      3360 8490 3374 8491
TIME...MOT...LOC 2306Z 266DEG 46KT 3370 8461

$$



19

030 
WWUS52 KFFC 282319
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
619 PM EST MON FEB 28 2011

GAC097-282327-
/O.CAN.KFFC.SV.W.0020.000000T0000Z-110228T2330Z/
DOUGLAS GA-
619 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR DOUGLAS COUNTY HAS BEEN 
CANCELLED...

THUNDERSTORMS THAT EARLIER PROMPTED SEVERE THUNDERSTORM AND TORNADO 
WARNINGS FOR DOUGLAS COUNTY HAVE MOVED EAST AND SOUTH OF THE AREA 
AND WEAKENED. NO WARNINGS ARE ANY LONGER IN EFFECT FOR DOUGLAS 
COUNTY AT THIS TIME.

LIGHT TO MODERATE RAIN AND OCCASIONAL CLOUD-TO-GROUND LIGHTNING CAN 
BE EXPECTED ACROSS SOUTHERN AND EASTERN DOUGLAS COUNTY FOR ANOTHER 
HOUR OR SO.

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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR NORTHERN GEORGIA.

LAT...LON 3363 8475 3365 8471 3366 8467 3369 8465
      3374 8458 3387 8436 3365 8435 3365 8446
      3361 8446 3359 8479
TIME...MOT...LOC 2317Z 266DEG 46KT 3371 8444

$$

GAC121-282330-
/O.CON.KFFC.SV.W.0020.000000T0000Z-110228T2330Z/
FULTON GA-
619 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EST
FOR CENTRAL FULTON COUNTY...

AT 613 PM EST...A SEVERE THUNDERSTORM WAS REPORTED. STRONG TO SEVERE 
THUNDERSTORMS CONTINUED FROM ATLANTA...TO COLLEGE PARK...TO 
CAMPBELLTON...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HAPEVILLE...WEST END...LAKEWOOD PARK...ATLANTIC STATION...TURNER
FIELD...ATLANTA...MIDTOWN...SWEET AUBURN...BUCKHEAD...GRANT PARK-ZOO
ATLANTA AND PIEDMONT PARK.

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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EST
MONDAY EVENING FOR NORTHERN GEORGIA.

&&

LAT...LON 3363 8475 3365 8471 3366 8467 3369 8465
      3374 8458 3387 8436 3365 8435 3365 8446
      3361 8446 3359 8479
TIME...MOT...LOC 2317Z 266DEG 46KT 3371 8444

$$



19

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 4:04 AM EST	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	15 hr
Feb 28, 2:25 PM EST	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	50 min
Feb 28, 2:45 PM EST	Severe Thunderstorm Warning	FFC	Murray, Whitfield	45 min
Feb 28, 3:08 PM EST	Severe Thunderstorm Warning	FFC	Chattooga, Dade, Floyd, Walker	37 min
Feb 28, 3:13 PM EST	Severe Thunderstorm Warning	FFC	Fannin, Gilmer	32 min
Feb 28, 3:29 PM EST	Severe Thunderstorm Warning	FFC	Towns, Union	31 min
Feb 28, 3:42 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd, Gordon	48 min
Feb 28, 3:50 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Polk	25 min
Feb 28, 4:09 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Pickens	51 min
Feb 28, 4:17 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd	13 min
Feb 28, 4:32 PM EST	Tornado Warning	FFC	Bartow, Cherokee, Cobb, Paulding	28 min
Feb 28, 4:40 PM EST	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Hall	50 min
Feb 28, 4:56 PM EST	Tornado Warning	FFC	Cherokee, Cobb, Forsyth, Fulton	35 min
Feb 28, 5:04 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Paulding, Polk	41 min
Feb 28, 5:16 PM EST	Severe Thunderstorm Warning	FFC	Banks, Barrow, Clarke, Gwinnett, Hall, Jackson and 3 more	44 min
Feb 28, 5:55 PM EST	Tornado Warning	FFC	Douglas, Fulton	35 min
Feb 28, 6:12 PM EST	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Henry, Newton, Rockdale	33 min
Feb 28, 6:36 PM EST	Severe Thunderstorm Warning	FFC	Meriwether, Troup	39 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.