Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS Atlanta, GA

February 28, 2011Catoosa County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 28, 2011, 2:25 PM EST for Catoosa County, Dade County, Walker County, Georgia. It was in force for 50 min. 8 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
Feb 28, 2011, 2:25 PM EST (19:25 UTC)
Expired
Feb 28, 2011, 3:15 PM EST
In force
50 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Catoosa County, GA, Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 82 km from the middle of the area, began a volume at 19:25 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

TimeReportWhereRemark
Feb 28, 2:30 PM ESTTSTM WND DMGRossville, GAWALKER COUNTY 911 RELAYED REPORTS OF DOWNED POWER LINES CAUSING A POWER OUTAGE IN ROSSVILLE.
Feb 28, 2:30 PM ESTTSTM WND DMGTrenton, GADADE COUNTY 911 RELAYED REPORTS OF WIDESPREAD DOWNED TREES IN AND AROUND TRENTON.
Feb 28, 2:30 PM ESTTSTM WND DMGWildwood, GADADE COUNTY EMERGENCY MANAGEMENT REPORTS WIDESPREAD TREE DAMAGE IN NORTH DADE COUNTY. INCLUDES DAMAGE TO 2 HOUSES ALONG HIGHWAY 299 AND IN THE PINECREST SUBDIVISION FROM DOWNED TREES. OVER 5 DOWNED POWERLINES HAVE BEEN REPORTED IN THE AREA AS WELL.
Feb 28, 2:30 PM ESTHAIL 1Rossville, GAWALKER COUNTY 911 RELAYED REPORTS OF QUARTER SIZED HAIL AROUND ROSSVILLE.
Feb 28, 2:32 PM ESTHAIL 0.881 E Trenton, GATRAINED SPOTTER REPORTED NICKEL SIZE HAIL 1 MILE EAST OF TRENTON.
Feb 28, 2:42 PM ESTTSTM WND DMG1 E Ringgold, GACATOOSA COUNTY 911 RELAYED REPORTS OF 3-4 TREES DOWN.
Feb 28, 3:10 PM ESTTSTM WND DMG3 Se Chickamauga, GAWALKER COUNTY EMERGENCY MANAGEMENT RELAYED REPORTS OF OVER A DOZEN TREES DOWNED BETWEEN CHICKAMAUGA AND ROCK SPRING IN WALKER COUNTY.
Feb 28, 3:10 PM ESTHAIL 13 Se Chickamauga, GAEMERGENCY MANAGEMENT IN WALKER COUNTY REPORTED QUARTER-SIZED HAIL BETWEEN CHICKAMAGUA AND ROCK SPRING.

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.

IssuedProductOfficeLasted
Feb 28, 1:29 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.4 hours before the alert went out and 180 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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.

755 
WUUS52 KFFC 281925
SVRFFC
GAC047-083-295-282015-
/O.NEW.KFFC.SV.W.0008.110228T1925Z-110228T2015Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CATOOSA COUNTY IN NORTHWEST GEORGIA
  DADE COUNTY IN NORTHWEST GEORGIA
  NORTHERN WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 315 PM EST

* AT 221 PM EST...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 TRENTON TO 10 MILES WEST OF TRENTON TO 18 MILES
  SOUTHWEST OF TRENTON...MOVING EAST AT 65 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LOOKOUT MOUNTAIN...ROSSVILLE...FORT OGLETHORPE...CHICKAMAUGA AND
  RINGGOLD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. 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 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 3500 8497 3497 8497 3490 8501 3485 8502
      3485 8506 3481 8508 3481 8512 3477 8514
      3475 8518 3473 8556 3497 8561 3499 8561
      3500 8531
TIME...MOT...LOC 1926Z 264DEG 58KT 3493 8549 3485 8559
          3477 8571

$$
2 follow-up statements
897 
WWUS52 KFFC 281946
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
744 PM GMT MON FEB 28 2011

GAC047-083-295-282015-
/O.CON.KFFC.SV.W.0008.000000T0000Z-110228T2015Z/
WALKER GA-CATOOSA GA-DADE GA-
246 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EST
FOR DADE...CATOOSA AND NORTHERN WALKER COUNTIES...

AT 242 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZED HAIL...AND DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM AROUND INDIAN SPRINGS TO NEAR 
BLUE SPRING...COOPER HEIGHTS AND CLOUDLAND CANYON STATE PARK... 
MOVING EAST AT 65 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GRAYSVILLE...RINGGOLD...BEAUMONT...ROCK SPRING...SALEM...NOBLE AND
WOOD STATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WEAK...SHORT LIVED TORNADOES CAN SOMETIMES DEVELOP ALONG THE LEADING
EDGE OF SEVERE THUNDERSTORM LINES LIKE THIS ONE. HOWEVER...THE MAIN
THREAT IS DAMAGING WINDS. SEEK SHELTER INSIDE A STURDY BUILDING AND
STAY AWAY FROM OUTSIDE WALLS AND WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE AND 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 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.

&&

LAT...LON 3500 8497 3497 8497 3490 8501 3485 8502
      3485 8506 3481 8508 3481 8512 3477 8514
      3475 8518 3473 8556 3497 8561 3499 8561
      3500 8531
TIME...MOT...LOC 1944Z 264DEG 58KT 3501 8516 3491 8519
          3483 8530 3479 8542

$$
482 
WWUS52 KFFC 281954
SVSFFC

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

GAC083-282003-
/O.CAN.KFFC.SV.W.0008.000000T0000Z-110228T2015Z/
DADE GA-
254 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR DADE COUNTY IS CANCELLED...

THE LINE OF SEVERE THUNDERSTORMS HAVE MOVED OUT OF DADE COUNTY.

IF YOU EXPERIENCED WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING 
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 3487 8503 3486 8506 3482 8508 3482 8510
      3481 8512 3482 8513 3477 8515 3475 8518
      3474 8546 3483 8545 3499 8536 3499 8498
TIME...MOT...LOC 1953Z 264DEG 57KT 3499 8501 3491 8502
          3483 8513 3475 8537

$$

GAC047-295-282015-
/O.CON.KFFC.SV.W.0008.000000T0000Z-110228T2015Z/
WALKER GA-CATOOSA GA-
254 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EST
FOR CATOOSA AND NORTHERN WALKER COUNTIES...

AT 251 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZED HAIL...AND DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM AROUND SALEM TO NEAR RINGGOLD... 
BEAUMONT AND COOPER HEIGHTS...MOVING EAST AT 65 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOOD
STATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WEAK...SHORT LIVED TORNADOES CAN SOMETIMES DEVELOP ALONG THE LEADING
EDGE OF SEVERE THUNDERSTORM LINES LIKE THIS ONE. HOWEVER...THE MAIN
THREAT IS DAMAGING WINDS. SEEK SHELTER INSIDE A STURDY BUILDING AND
STAY AWAY FROM OUTSIDE WALLS AND WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE AND 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 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.

&&

LAT...LON 3487 8503 3486 8506 3482 8508 3482 8510
      3481 8512 3482 8513 3477 8515 3475 8518
      3474 8546 3483 8545 3499 8536 3499 8498
TIME...MOT...LOC 1953Z 264DEG 57KT 3499 8501 3491 8502
          3483 8513 3475 8537

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 28, 4:04 AM ESTWind AdvisoryFFCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more15 hr
Feb 28, 2:45 PM ESTSevere Thunderstorm WarningFFCMurray, Whitfield45 min
Feb 28, 3:08 PM ESTSevere Thunderstorm WarningFFCChattooga, Dade, Floyd, Walker37 min
Feb 28, 3:13 PM ESTSevere Thunderstorm WarningFFCFannin, Gilmer32 min
Feb 28, 3:29 PM ESTSevere Thunderstorm WarningFFCTowns, Union31 min
Feb 28, 3:42 PM ESTSevere Thunderstorm WarningFFCBartow, Chattooga, Floyd, Gordon48 min
Feb 28, 3:50 PM ESTSevere Thunderstorm WarningFFCBartow, Floyd, Polk25 min
Feb 28, 4:09 PM ESTSevere Thunderstorm WarningFFCBartow, Cherokee, Pickens51 min
Feb 28, 4:17 PM ESTSevere Thunderstorm WarningFFCBartow, Floyd13 min
Feb 28, 4:32 PM ESTTornado WarningFFCBartow, Cherokee, Cobb, Paulding28 min
Feb 28, 4:40 PM ESTSevere Thunderstorm WarningFFCDawson, Forsyth, Hall50 min
Feb 28, 4:56 PM ESTTornado WarningFFCCherokee, Cobb, Forsyth, Fulton35 min
Feb 28, 5:04 PM ESTSevere Thunderstorm WarningFFCCarroll, Haralson, Paulding, Polk41 min
Feb 28, 5:16 PM ESTSevere Thunderstorm WarningFFCBanks, Barrow, Clarke, Gwinnett, Hall, Jackson and 3 more44 min
Feb 28, 5:49 PM ESTSevere Thunderstorm WarningFFCCarroll, Cobb, Douglas, Fulton, Paulding41 min
Feb 28, 5:55 PM ESTTornado WarningFFCDouglas, Fulton35 min
Feb 28, 6:12 PM ESTSevere Thunderstorm WarningFFCClayton, DeKalb, Henry, Newton, Rockdale33 min
Feb 28, 6:36 PM ESTSevere Thunderstorm WarningFFCMeriwether, Troup39 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011Every 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.