Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 185, NWS Atlanta, GA

April 21, 2011Carroll County, Haralson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 21, 2011, 1:54 AM EDT for Carroll County, Haralson County, Georgia. It was in force for 51 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 21, 2011, 1:54 AM EDT (05:54 UTC)
Expired: Apr 21, 2011, 2:45 AM EDT
In force: 51 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Carroll County, GA, Haralson County, GA

The radar

The Atlanta radar (KFFC), 65 km from the middle of the area, began a volume at 05:56 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 nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.9 hours before the alert went out and 69 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: 316 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1406 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 108 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.

759 
WUUS52 KFFC 210554
SVRFFC
GAC045-143-210645-
/O.NEW.KFFC.SV.W.0185.110421T0554Z-110421T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
154 AM EDT THU APR 21 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CARROLL COUNTY IN NORTHWEST GEORGIA
  HARALSON COUNTY IN NORTHWEST GEORGIA

* UNTIL 245 AM EDT

* AT 151 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED 13 MILES SOUTHWEST OF TALLAPOOSA...
  MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
  ZION...WACO...BUCHANAN...BREMEN...TEMPLE AND VILLA RICA.

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.

&&

LAT...LON 3388 8504 3381 8503 3378 8490 3363 8490
      3356 8532 3378 8537
TIME...MOT...LOC 0553Z 255DEG 41KT 3363 8543

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 2:06 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Polk	39 min
Apr 21, 2:27 AM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Douglas, Fulton, Heard	48 min
Apr 21, 2:46 AM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Fulton, Paulding	44 min
Apr 21, 3:08 AM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, DeKalb, Forsyth, Fulton, Gwinnett	52 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.