Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 16, NWS Atlanta, GA

February 28, 2011Bartow County, Floyd County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 28, 2011, 4:17 PM EST for Bartow County, Floyd County, Georgia. It was in force for 13 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
Feb 28, 2011, 4:17 PM EST (21:17 UTC)
Expired
Feb 28, 2011, 4:30 PM EST
In force
13 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Bartow County, GA, Floyd County, GA

The radar

The Atlanta radar (KFFC), 99 km from the middle of the area, began a volume at 21:16 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.

IssuedProductOfficeLasted
Feb 28, 1:29 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.3 hours before the alert went out and 101 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.

942 
WUUS52 KFFC 282117
SVRFFC
GAC015-115-282130-
/O.NEW.KFFC.SV.W.0016.110228T2117Z-110228T2130Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BARTOW COUNTY IN NORTHWEST GEORGIA
  SOUTHEASTERN FLOYD COUNTY IN NORTHWEST GEORGIA

* UNTIL 430 PM EST

* AT 412 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 NORTHWEST OF 
  TAYLORSVILLE...MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LINDALE...EUHARLEE AND KINGSTON.

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 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 3423 8522 3424 8492 3409 8494 3408 8503
      3410 8505 3409 8512 3408 8512 3408 8515
      3410 8516 3410 8521
TIME...MOT...LOC 2117Z 265DEG 33KT 3417 8509

$$

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, 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, 4:32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.