Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 304, NWS Atlanta, GA

June 15, 2011Cobb County, Douglas County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 15, 2011, 6:45 PM EDT for Cobb County, Douglas County, Georgia. It was in force for 45 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: Jun 15, 2011, 6:45 PM EDT (22:45 UTC)
Expired: Jun 15, 2011, 7:30 PM EDT
In force: 45 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Cobb County, GA, Douglas County, GA

The radar

The Atlanta radar (KFFC), 56 km from the middle of the area, began a volume at 22:47 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

Time	Report	Where
Jun 15, 6:50 PM EDT	HAIL 1.25	4 W Douglasville, GA
Jun 15, 6:55 PM EDT	HAIL 1	3 E Hiram, GA
Jun 15, 6:55 PM EDT	HAIL 1.75	4 W Douglasville, GA
Jun 15, 6:55 PM EDT	HAIL 2.5	Douglasville, GA
Jun 15, 7:00 PM EDT	HAIL 1.5	3 E Douglasville, GA

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
Jun 15, 12:52 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.8 hours before the alert went out and 57 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: 227 J/kg
Mixed-layer CIN: -377 J/kg
Mixed-layer LCL: 1521 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

830 
WUUS52 KFFC 152245
SVRFFC
GAC067-097-152330-
/O.NEW.KFFC.SV.W.0304.110615T2245Z-110615T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
645 PM EDT WED JUN 15 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COBB COUNTY IN NORTH CENTRAL GEORGIA
  NORTHERN DOUGLAS COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 730 PM EDT

* AT 638 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZED.  THIS STORM WAS LOCATED 6 MILES NORTHWEST OF
  POWDER SPRINGS...MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  DOUGLASVILLE...KENNESAW...LITHIA SPRINGS...AUSTELL...MARIETTA AND
  SMYRNA.

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR NORTHERN GEORGIA.

&&

LAT...LON 3378 8489 3379 8473 3394 8472 3395 8474
      3401 8474 3406 8443 3393 8442 3391 8445
      3388 8444 3385 8446 3383 8446 3372 8461
      3369 8490
TIME...MOT...LOC 2245Z 281DEG 24KT 3389 8473

$$

1 follow-up statement

208 
WWUS52 KFFC 152323
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
723 PM EDT WED JUN 15 2011

GAC067-097-152333-
/O.EXP.KFFC.SV.W.0304.000000T0000Z-110615T2330Z/
COBB GA-DOUGLAS GA-
723 PM EDT WED JUN 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DOUGLAS AND COBB
COUNTIES EXPIRES AT 730 PM EDT...

AT 715 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR 
VININGS...MOVING EAST AT 30 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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR NORTHERN GEORGIA.

LAT...LON 3378 8489 3379 8473 3394 8472 3395 8474
      3401 8474 3406 8443 3393 8442 3391 8445
      3388 8444 3385 8446 3383 8446 3372 8461
      3369 8490
TIME...MOT...LOC 2323Z 281DEG 24KT 3384 8443

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 1:26 PM EDT	Special Weather Statement	FFC	Catoosa	49 min
Jun 15, 1:34 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker	41 min
Jun 15, 1:59 PM EDT	Special Weather Statement	FFC	Murray	31 min
Jun 15, 2:30 PM EDT	Special Weather Statement	FFC	Fannin	45 min
Jun 15, 3:42 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	48 min
Jun 15, 4:08 PM EDT	Special Weather Statement	FFC	Chattooga	52 min
Jun 15, 4:27 PM EDT	Special Weather Statement	FFC	Floyd	48 min
Jun 15, 4:33 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker, Whitfield	42 min
Jun 15, 5:08 PM EDT	Special Weather Statement	FFC	Floyd, Polk	37 min
Jun 15, 5:16 PM EDT	Special Weather Statement	FFC	Gilmer, Murray	44 min
Jun 15, 5:17 PM EDT	Special Weather Statement	FFC	Cherokee	43 min
Jun 15, 5:32 PM EDT	Special Weather Statement	FFC	Cobb, Paulding	43 min
Jun 15, 5:33 PM EDT	Special Weather Statement	FFC	Pickens	27 min
Jun 15, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Floyd, Polk	37 min
Jun 15, 5:52 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding	38 min
Jun 15, 6:00 PM EDT	Special Weather Statement	FFC	Forsyth	45 min
Jun 15, 6:07 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth, Hall	38 min
Jun 15, 6:15 PM EDT	Special Weather Statement	FFC	Towns	30 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Haralson, Paulding, Polk	41 min
Jun 15, 6:20 PM EDT	Special Weather Statement	FFC	White	10 min
Jun 15, 6:29 PM EDT	Special Weather Statement	FFC	Cobb	46 min
Jun 15, 6:37 PM EDT	Special Weather Statement	FFC	Polk	53 min
Jun 15, 6:48 PM EDT	Special Weather Statement	FFC	Forsyth, Hall	42 min
Jun 15, 6:55 PM EDT	Special Weather Statement	FFC	Barrow, Gwinnett	50 min
Jun 15, 7:10 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Douglas, Fayette, Fulton	65 min
Jun 15, 7:29 PM EDT	Special Weather Statement	FFC	Clarke	31 min
Jun 15, 7:35 PM EDT	Special Weather Statement	FFC	Madison	25 min
Jun 15, 7:36 PM EDT	Special Weather Statement	FFC	Catoosa	39 min
Jun 15, 7:37 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett, Walton	53 min
Jun 15, 7:41 PM EDT	Special Weather Statement	FFC	Oconee	19 min
Jun 15, 7:51 PM EDT	Special Weather Statement	FFC	Polk	39 min
Jun 15, 7:53 PM EDT	Severe Thunderstorm Warning	FFC	Henry, Newton, Rockdale	67 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.