Alert archive / Georgia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 218, NWS Atlanta, GA

August 23, 20144 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 23, 2014, 4:47 PM EDT for 4 counties in Georgia. It was in force for 43 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: Aug 23, 2014, 4:47 PM EDT (20:47 UTC)
Expired: Aug 23, 2014, 5:30 PM EDT
In force: 43 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bartow County, GA, Cherokee County, GA, Cobb County, GA, Paulding County, GA

The radar

The Atlanta radar (KFFC), 66 km from the middle of the area, began a volume at 20:47 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	Remark
Aug 23, 4:55 PM EDT	TSTM WND DMG	1 Ese Mountain Ridge Es, GA	A TREE BLEW DOWN ONTO HIGHWAY 41 NEAR THE COBB COUNTY LINE. TWO OTHER TREES FELL ONTO HOUSES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.8 hours before the alert went out and 66 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: 304 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1414 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -34 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.

496 
WUUS52 KFFC 232047
SVRFFC
GAC015-057-067-223-232130-
/O.NEW.KFFC.SV.W.0218.140823T2047Z-140823T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
447 PM EDT SAT AUG 23 2014

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  COBB COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN BARTOW COUNTY IN NORTHWEST GEORGIA
  NORTHEASTERN PAULDING COUNTY IN NORTHWEST GEORGIA

* UNTIL 530 PM EDT

* AT 443 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR
  ACWORTH...MOVING SOUTHEAST AT 15 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...HAIL OR 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 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3420 8464 3390 8443 3384 8446 3378 8461
      3380 8463 3381 8470 3412 8483
TIME...MOT...LOC 2047Z 336DEG 14KT 3408 8469

$$

1 follow-up statement

564 
WWUS52 KFFC 232123
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
523 PM EDT SAT AUG 23 2014

GAC015-057-067-223-232133-
/O.EXP.KFFC.SV.W.0218.000000T0000Z-140823T2130Z/
PAULDING GA-BARTOW GA-CHEROKEE GA-COBB GA-
523 PM EDT SAT AUG 23 2014

...THE SEVERE THUNDERSTORM WARNING FOR COBB...SOUTHWESTERN
CHEROKEE...SOUTHEASTERN BARTOW AND NORTHEASTERN PAULDING COUNTIES
WILL EXPIRE AT 530 PM EDT...

IF YOU SEE WIND DAMAGE...HAIL OR 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 OR TWEET US YOUR REPORT AT NWSATLANTA.

LAT...LON 3420 8464 3390 8443 3384 8446 3378 8461
      3380 8463 3381 8470 3412 8483
TIME...MOT...LOC 2123Z 329DEG 13KT 3392 8459

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 3:27 PM EDT	Special Weather Statement	FFC	Murray, Whitfield	33 min
Aug 23, 4:08 PM EDT	Special Weather Statement	FFC	Bartow	37 min
Aug 23, 4:38 PM EDT	Special Weather Statement	FFC	Bartow	37 min
Aug 23, 4:58 PM EDT	Special Weather Statement	FFC	Polk	32 min
Aug 23, 5:42 PM EDT	Special Weather Statement	FFC	White	33 min
Aug 23, 5:49 PM EDT	Special Weather Statement	FFC	Clayton	26 min
Aug 23, 6:12 PM EDT	Special Weather Statement	FFC	Henry	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2014 Every severe thunderstorm warning in 2014

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.