Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 500, NWS Atlanta, GA

November 16, 2011Cobb County, DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Nov 16, 2011, 1:25 PM EST for Cobb County, DeKalb County, Fulton County, Georgia. It was in force for 35 min. 1 report 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: Nov 16, 2011, 1:25 PM EST (18:25 UTC)
Expired: Nov 16, 2011, 2:00 PM EST
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Cobb County, GA, DeKalb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 61 km from the middle of the area, began a volume at 18:27 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
Nov 16, 1:32 PM EST	TSTM WND DMG	5 Ese Marietta, GA	COBB COUNTY 911 RELAYED REPORTS OF SEVERAL DOWNED TREES IN THE MARIETTA AND SMYRNA AREAS. POWER OUTAGES WERE REPORTED IN THE POWDER SPRINGS AREA.

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
Nov 16, 10:46 AM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.4 hours before the alert went out and 59 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: 627 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

211 
WUUS52 KFFC 161825
SVRFFC
GAC067-089-121-161900-
/O.NEW.KFFC.SV.W.0500.111116T1825Z-111116T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
125 PM EST WED NOV 16 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA
  NORTHWESTERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
  CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 200 PM EST

* AT 123 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR AUSTELL...MOVING NORTHEAST AT 50
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SMYRNA...BUCKHEAD...SANDY SPRINGS...CHAMBLEE...DUNWOODY AND
  DORAVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. 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 700 PM EST WEDNESDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3402 8433 3397 8426 3396 8428 3392 8426
      3390 8423 3388 8422 3374 8457 3380 8463
      3381 8469 3382 8469
TIME...MOT...LOC 1825Z 235DEG 43KT 3384 8454

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 16, 11:23 AM EST	Special Weather Statement	FFC	Dade	67 min
Nov 16, 12:04 PM EST	Special Weather Statement	FFC	Floyd, Polk	41 min
Nov 16, 12:22 PM EST	Special Weather Statement	FFC	Carroll, Douglas	38 min
Nov 16, 12:46 PM EST	Tornado Warning	FFC	Cobb, Paulding	29 min
Nov 16, 1:06 PM EST	Tornado Warning	FFC	Cherokee, Cobb, Fulton	39 min
Nov 16, 1:11 PM EST	Tornado Warning	FFC	Harris, Troup	49 min
Nov 16, 1:28 PM EST	Severe Thunderstorm Warning	FFC	Cherokee, Forsyth	47 min
Nov 16, 1:42 PM EST	Special Weather Statement	FFC	Fannin, Murray	48 min
Nov 16, 1:44 PM EST	Tornado Warning	FFC	DeKalb, Fulton, Gwinnett	26 min
Nov 16, 1:52 PM EST	Tornado Warning	FFC	Harris, Meriwether, Talbot, Upson	38 min
Nov 16, 1:59 PM EST	Severe Thunderstorm Warning	FFC	Fannin, Union	31 min
Nov 16, 2:04 PM EST	Special Weather Statement	FFC	Hall	26 min
Nov 16, 2:13 PM EST	Special Weather Statement	FFC	Chattahoochee, Marion, Muscogee	47 min
Nov 16, 2:24 PM EST	Tornado Warning	FFC	Lamar, Meriwether, Pike, Talbot, Upson	36 min
Nov 16, 2:37 PM EST	Special Weather Statement	FFC	Murray	53 min
Nov 16, 2:41 PM EST	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion	24 min
Nov 16, 2:56 PM EST	Special Weather Statement	FFC	Jasper, Lamar, Monroe	34 min
Nov 16, 3:00 PM EST	Special Weather Statement	FFC	Stewart, Webster	45 min
Nov 16, 3:08 PM EST	Tornado Warning	FFC	Jasper, Jones, Monroe, Putnam	39 min
Nov 16, 3:20 PM EST	Severe Thunderstorm Warning	FFC	Bibb, Twiggs, Wilkinson	40 min
Nov 16, 3:32 PM EST	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Washington	58 min
Nov 16, 3:38 PM EST	Special Weather Statement	FFC	Macon, Marion, Schley, Sumter, Webster	37 min
Nov 16, 3:44 PM EST	Special Weather Statement	FFC	Hancock, Putnam	46 min
Nov 16, 3:44 PM EST	Tornado Warning	FFC	Glascock, Jefferson, Washington	46 min
Nov 16, 3:54 PM EST	Severe Thunderstorm Warning	FFC	Bleckley, Houston, Twiggs	36 min
Nov 16, 4:03 PM EST	Severe Thunderstorm Warning	FFC	Baldwin, Washington, Wilkinson	42 min
Nov 16, 4:13 PM EST	Special Weather Statement	FFC	Macon, Schley, Sumter, Taylor	32 min
Nov 16, 4:17 PM EST	Severe Thunderstorm Warning	FFC	Laurens, Wilkinson	43 min
Nov 16, 4:21 PM EST	Special Weather Statement	FFC	Dooly	39 min
Nov 16, 4:23 PM EST	Tornado Warning	FFC	Jefferson, Washington	37 min
Nov 16, 4:50 PM EST	Tornado Warning	FFC	Johnson, Laurens	40 min
Nov 16, 5:00 PM EST	Special Weather Statement	FFC	Crisp	30 min
Nov 16, 5:00 PM EST	Tornado Warning	FFC	Jefferson	45 min
Nov 16, 5:06 PM EST	Tornado Warning	FFC	Jefferson	39 min
Nov 16, 5:21 PM EST	Special Weather Statement	FFC	Crisp, Pulaski, Wilcox	24 min
Nov 16, 5:27 PM EST	Tornado Warning	FFC	Emanuel	48 min
Nov 16, 5:41 PM EST	Special Weather Statement	FFC	Dodge, Pulaski, Wilcox	49 min
Nov 16, 5:54 PM EST	Severe Thunderstorm Warning	FFC	Dodge, Telfair, Wilcox	51 min
Nov 16, 6:40 PM EST	Severe Thunderstorm Warning	FFC	Telfair, Wheeler	37 min
Nov 16, 6:51 PM EST	Tornado Warning	FFC	Montgomery, Telfair, Wheeler	39 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.