Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 199, NWS Atlanta, GA

April 27, 2011Carroll County, Haralson County, Heard County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 27, 2011, 8:28 AM EDT for Carroll County, Haralson County, Heard County, Georgia. It was in force for 32 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: Apr 27, 2011, 8:28 AM EDT (12:28 UTC)
Expired: Apr 27, 2011, 9:00 AM EDT
In force: 32 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Carroll County, GA, Haralson County, GA, Heard County, GA

The radar

The Atlanta radar (KFFC), 46 km from the middle of the area, began a volume at 12:31 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.

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, 0.5 hours before the alert went out and 52 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.

283 
WUUS52 KFFC 271228
SVRFFC
GAC045-143-149-271300-
/O.NEW.KFFC.SV.W.0199.110427T1228Z-110427T1300Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARROLL COUNTY IN NORTHWEST GEORGIA
  SOUTHERN HARALSON COUNTY IN NORTHWEST GEORGIA
  HEARD COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 900 AM EDT

* AT 827 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
  QUARTER SIZED HAIL...AND DESTRUCTIVE WINDS UP TO 70 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MOUNT ZION TO 25
  MILES SOUTHWEST OF EPHESUS...MOVING EAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BOWDON...WACO...BREMEN...TEMPLE...CARROLLTON...ROOPVILLE...VILLA
  RICA...CENTRALHATCHEE AND FRANKLIN.

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 NOON EDT WEDNESDAY FOR
NORTHERN GEORGIA.

&&

LAT...LON 3381 8502 3379 8492 3378 8490 3357 8490
      3344 8493 3345 8499 3343 8502 3330 8497
      3323 8498 3315 8524 3371 8535
TIME...MOT...LOC 1228Z 252DEG 51KT 3365 8521 3312 8555

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 8:04 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd, Haralson, Polk	56 min
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, 8:35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.