Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 198, NWS Atlanta, GA

April 27, 20115 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 27, 2011, 8:04 AM EDT for 5 counties in Georgia. It was in force for 56 min. 5 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: Apr 27, 2011, 8:04 AM EDT (12:04 UTC)
Expired: Apr 27, 2011, 9:00 AM EDT
In force: 56 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bartow County, GA, Chattooga County, GA, Floyd County, GA, Haralson County, GA, Polk County, GA

The radar

The Atlanta radar (KFFC), 100 km from the middle of the area, began a volume at 12:03 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
Apr 27, 8:17 AM EDT	TSTM WND DMG	Cave Spring, GA	FLOYD COUNTY EMA RELAYED A REPORT OF WIDESPREAD TREE DAMAGE NEAR CAVE SPRING IN FLOYD COUNTY.
Apr 27, 8:27 AM EDT	TSTM WND DMG	1 W Rome, GA	FLOYD COUNTY EMA RELAYED A REPORT OF TREES DOWN ON THE WEST SIDE OF ROME.
Apr 27, 8:27 AM EDT	TSTM WND DMG	Buchanan, GA	HARALSON COUNTY 911 RELAYED A REPORT OF TREES DOWN COUNTYWIDE.
Apr 27, 8:27 AM EDT	TSTM WND DMG	Cedartown, GA	POLK COUNTY 911 RELAYED A REPORT OF WIDESPREAD TREE DAMAGE ACROSS THE COUNTY.
Apr 27, 8:30 AM EDT	TSTM WND DMG	Tallapoosa, GA	THE PUBLIC RELAYED A REPORT OF A TREE ON A HOUSE AND CAR IN TALLAPOOSA.

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
Apr 27, 7:48 AM EDT	Tornado Watch	SPC	2 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.1 hours before the alert went out and 103 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: 748 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 460 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

844 
WUUS52 KFFC 271204
SVRFFC
GAC015-055-115-143-233-271300-
/O.NEW.KFFC.SV.W.0198.110427T1204Z-110427T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
804 AM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BARTOW COUNTY IN NORTHWEST GEORGIA
  CHATTOOGA COUNTY IN NORTHWEST GEORGIA
  FLOYD COUNTY IN NORTHWEST GEORGIA
  HARALSON COUNTY IN NORTHWEST GEORGIA
  POLK COUNTY IN NORTHWEST GEORGIA

* UNTIL 900 AM EDT

* AT 759 AM EDT...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 25 MILES WEST OF CAVE SPRING TO 20 MILES 
  WEST OF TALLAPOOSA...MOVING EAST NORTHEAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CEDARTOWN...SUMMERVILLE...ROME...BUCHANAN...WACO...SHANNON...
  BREMEN...ARAGON...ROCKMART...TAYLORSVILLE AND KINGSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 NOON EDT WEDNESDAY FOR
NORTHERN GEORGIA.

&&

LAT...LON 3458 8515 3449 8509 3446 8511 3444 8509
      3440 8511 3440 8503 3430 8495 3422 8494
      3396 8500 3395 8505 3385 8503 3371 8507
      3369 8512 3370 8514 3365 8530 3365 8534
      3442 8550
TIME...MOT...LOC 1202Z 234DEG 52KT 3423 8572 3392 8554
          3333 8569

$$

1 follow-up statement

564 
WWUS52 KFFC 271212
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
812 AM EDT WED APR 27 2011

GAC015-055-115-143-233-271300-
/O.CON.KFFC.SV.W.0198.000000T0000Z-110427T1300Z/
POLK GA-BARTOW GA-CHATTOOGA GA-FLOYD GA-HARALSON GA-
812 AM EDT WED APR 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EDT
FOR HARALSON...FLOYD...CHATTOOGA...SOUTHWESTERN BARTOW AND POLK
COUNTIES...

AT 808 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DESTRUCTIVE WINDS UP TO 70 MPH AS WELL AS LARGE HAIL TO THE SIZE OF
QUARTERS. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 
10 MILES WEST OF CHATTOOGAVILLE TO 10 MILES WEST OF TALLAPOOSA...
MOVING NORTHEAST AT 60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ESOM
HILL...CAVE SPRING...COOSA...LYERLY...HOLLAND...CEDARTOWN...
BERRYTON...JAMES H. FLOYD STATE PARK...LINDALE...SUMMERVILLE...
FELTON...ROME...TIDINGS...ANTIOCH...SENEY...BUCHANAN...FISH CREEK...
ARMUCHEE...WACO...SHANNON...BREMEN...ARAGON...PINSON...EUBANK LAKE...
EVERETT SPRINGS...ROCKMART...VAN WERT...TAYLORSVILLE AND DRAKETOWN.

MOVE TO A SAFE PLACE NOW!

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.

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 NOON EDT WEDNESDAY FOR
NORTHERN GEORGIA.

&&

LAT...LON 3458 8515 3449 8509 3446 8511 3444 8509
      3440 8511 3440 8503 3430 8495 3422 8494
      3396 8500 3395 8505 3385 8503 3371 8507
      3369 8512 3370 8514 3365 8530 3365 8534
      3442 8550
TIME...MOT...LOC 1211Z 234DEG 52KT 3433 8557 3402 8540
          3343 8555

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 8:16 AM EDT	Tornado Warning	FFC	Catoosa, Chattooga, Dade, Walker, Whitfield	44 min
Apr 27, 8:25 AM EDT	Tornado Warning	FFC	Dade, Walker	35 min
Apr 27, 8:28 AM EDT	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Heard	32 min
Apr 27, 8:35 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Gilmer, Gordon, Murray and 5 more	55 min
Apr 27, 8:42 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Murray, Whitfield	48 min
Apr 27, 8:51 AM EDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Douglas, Fayette, Fulton	29 min
Apr 27, 8:54 AM EDT	Tornado Warning	FFC	Gilmer, Gordon, Murray, Whitfield	51 min
Apr 27, 9:02 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	16 min
Apr 27, 9:26 AM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray	39 min
Apr 27, 1:59 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	61 min
Apr 27, 2:25 PM EDT	Tornado Warning	FFC	Dade, Walker	34 min
Apr 27, 2:37 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Whitfield	25 min
Apr 27, 5:07 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	38 min
Apr 27, 5:14 PM EDT	Tornado Warning	FFC	Dade, Walker	46 min
Apr 27, 5:51 PM EDT	Tornado Warning	FFC	Catoosa	24 min
Apr 27, 5:53 PM EDT	River Flood Warning	FFC	Dade	11 hr
Apr 27, 6:03 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker	27 min
Apr 27, 6:15 PM EDT	Severe Thunderstorm Warning	FFC	Dade	30 min
Apr 27, 7:20 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga, Dade, Walker	55 min
Apr 27, 7:32 PM EDT	Tornado Warning	FFC	Chattooga, Dade, Walker	43 min
Apr 27, 7:59 PM EDT	Tornado Warning	FFC	Catoosa, Walker, Whitfield	46 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.