Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Atlanta, GA

February 28, 2011Murray County, Whitfield County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 28, 2011, 2:45 PM EST for Murray County, Whitfield County, Georgia. It was in force for 45 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
Feb 28, 2011, 2:45 PM EST (19:45 UTC)
Expired
Feb 28, 2011, 3:30 PM EST
In force
45 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Murray County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 112 km from the middle of the area, began a volume at 19:47 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, 3:00 PM ESTTSTM WND DMG2 Ne Cohutta, GAWHITFIELD COUNTY EMERGENCY MANAGEMENT REPORTS SEVERAL TREES DOWN ON HIGHWAY 71 JUST SOUTH OF THE GEORGIA-TENNESSEE BORDER.
Feb 28, 3:00 PM ESTTSTM WND DMGCohutta, GAWHITFIELD COUNTY 911 RELAYED REPORT OF 2 DOWNED TREES ON HOUSES IN COHUTTA.
Feb 28, 3:10 PM ESTTSTM WND DMGSsw Tennga, GAMURRAY COUNTY 911 RELAYED REPORTS OF 3 DOWNED TREES ON HIGHWAY 411 IN NORTHERN MURRAY COUNTY.

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, 7.8 hours before the alert went out and 170 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.

788 
WUUS52 KFFC 281945
SVRFFC
GAC213-313-282030-
/O.NEW.KFFC.SV.W.0009.110228T1945Z-110228T2030Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MURRAY COUNTY IN NORTHWEST GEORGIA
  NORTHERN WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 330 PM EST

* AT 242 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 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 14 MILES NORTHWEST OF TUNNEL HILL TO 12
  MILES WEST OF TUNNEL HILL TO 17 MILES WEST OF TUNNEL HILL...MOVING
  EAST AT 65 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  VARNELL...COHUTTA...DALTON AND ETON.

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 8462 3484 8462 3482 8459 3478 8461
      3477 8464 3475 8515 3481 8512 3481 8506
      3485 8506 3485 8502 3490 8501 3493 8498
      3500 8497
TIME...MOT...LOC 1944Z 264DEG 58KT 3498 8519 3489 8520
          3482 8530

$$
2 follow-up statements
653 
WWUS52 KFFC 282012
SVSFFC

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

GAC213-313-282030-
/O.CON.KFFC.SV.W.0009.000000T0000Z-110228T2030Z/
WHITFIELD GA-MURRAY GA-
312 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EST
FOR NORTHERN MURRAY AND EAST CENTRAL WHITFIELD COUNTIES...

AT 308 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 CISCO TO SUMAC...MOVING EAST AT
65 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CONASAUGA LAKE.

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.

&&

LAT...LON 3478 8462 3477 8464 3479 8495 3483 8494
      3490 8497 3498 8474 3500 8462 3484 8462
      3482 8459
TIME...MOT...LOC 2012Z 264DEG 58KT 3503 8464 3494 8465
          3487 8475

$$
688 
WWUS52 KFFC 282028
SVSFFC

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

GAC213-313-282036-
/O.EXP.KFFC.SV.W.0009.000000T0000Z-110228T2030Z/
WHITFIELD GA-MURRAY GA-
328 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MURRAY AND EAST
CENTRAL WHITFIELD COUNTIES EXPIRES AT 330 PM EST...

AT 323 PM EST...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
QUARTER SIZED HAIL AND DAMAGING WINDS UP TO 60 MPH HAD MOVED INTO 
FANNIN AND EXTREME EASTERN MURRAY COUNTY. THE STORMS WERE GENERALLY 
EAST OF A LINE FROM JONES MILL TO CONASAUGA LAKE...MOVING EAST AT 65 
MPH.

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 3478 8462 3477 8464 3479 8495 3483 8494
      3490 8497 3498 8474 3500 8462 3484 8462
      3482 8459
TIME...MOT...LOC 2026Z 264DEG 58KT 3505 8436 3496 8438
          3489 8448

$$



19

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, 2:25 PM ESTSevere Thunderstorm WarningFFCCatoosa, Dade, Walker50 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.