Alert archive / Georgia / Tornado Warnings in 2013

Tornado Warning 21, NWS Atlanta, GA

June 13, 2013Cherokee County, Cobb County, Fulton County, Georgia

NWS Atlanta, GA issued this tornado warning at Jun 13, 2013, 7:27 PM EDT for Cherokee County, Cobb County, Fulton County, Georgia. It was in force for 33 min. 6 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 13, 2013, 7:27 PM EDT (23:27 UTC)
Expired
Jun 13, 2013, 8:00 PM EDT
In force
33 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Cherokee County, GA, Cobb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 81 km from the middle of the area, began a volume at 23:27 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

TimeReportWhereRemark
Jun 13, 7:30 PM EDTTORNADO2 Sse Woodstock, GATHE TORNADO THAT TOUCHED DOWN JUST INSIDE THE CHEROKEE COUNTY LINE MOVED INTO COBB COUNTY AND STRENGTHENED TO AN EF-1. THE TORNADO TRACKED SOUTHEAST THROUGH COBB COUNTY WITH THE MOST SIGNIFICANT DAMAGE OCCURRING NEAR WENDWOOD DRIVE NE AND NEAR BISHOP LAKE WHER
Jun 13, 7:30 PM EDTTORNADO2 S Woodstock, GAAN NWS SURVEY TEAM DETERMINED THAT A SECOND TORNADO TOUCHED DOWN WITHIN A TENTH OF A MILE OF THE CHEROKEE-COBB COUNTY LINE JUST INSIDE THE CHEROKEE COUNTY LINE ALONG WOODHAVE DRIVE. TREES AND LARGE LIMBS WERE REPORTED DOWN AT THIS LOCATION BEFORE THE TORNADO M
Jun 13, 7:41 PM EDTTORNADO 13 N Sandy Springs, GATHE TORNADO THAT MOVED THROUGH CHEROKEE AND COBB COUNTIES TRACKED INTO FULTON COUNTY AT THE CHATTAHOOCHEE RIVER NEAR MORGAN FALLS. THE TORNADO RETAINED ITS STRENGTH AT EF1 AS IT SNAPPED AND UPROOTED TREES ALONG THE RIVER AND DAMAGED ROOFS AT THE LAUREL OVERLOO
Jun 13, 7:41 PM EDTTORNADO2 Nw Sandy Springs, GATHE TORNADO THAT MOVED THROUGH CHEROKEE AND COBB COUNTIES TRACKED INTO FULTON COUNTY AT THE CHATTAHOOCHEE RIVER NEAR JOHNSON FERRY ROAD AND RIVERSIDE DRIVE. THE TORNADO WEAKENED TO AN EF0 THROUGH FULTON COUNTY...DOWNING TREES...LARGE LIMBS...AND SPLITTING TREE
Jun 13, 7:50 PM EDTTSTM WND DMGSandy Springs, GASEVERAL TREES ARE DOWN ACROSS SANDY SPRINGS.
Jun 13, 7:51 PM EDTTSTM WND DMGSandy Springs, GASEVERAL LARGE TREES ARE DOWN NEAR NORTH RIDGE AND ROSWELL ROADS.

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.

IssuedProductOfficeLasted
Jun 13, 1:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 6:28 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.5 hours before the alert went out and 79 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2013-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1940 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2013-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -131 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1940 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1112 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-131 m²/s²
0-3 km storm-relative helicity
-109 m²/s²
Significant tornado parameter
0.0
Supercell composite
-2.8

Open this sounding in Storm Lab

The text

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

194 
WFUS52 KFFC 132327
TORFFC
GAC057-067-121-140000-
/O.NEW.KFFC.TO.W.0021.130613T2327Z-130614T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
727 PM EDT THU JUN 13 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA
  NORTHEASTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 800 PM EDT

* AT 722 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HOLLY
  SPRINGS...MOVING SOUTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MOUNTAIN PARK...MILTON...ALPHARETTA...ROSWELL...SANDY SPRINGS AND
  JOHNS CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO A
BASEMENT OR INTERIOR ROOM ON THE GROUND FLOOR. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT FRIDAY
MORNING FOR NORTHERN GEORGIA. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR NORTHERN
GEORGIA.

&&

LAT...LON 3418 8425 3411 8426 3410 8422 3404 8412
      3403 8417 3400 8421 3400 8425 3396 8430
      3397 8434 3394 8435 3386 8451 3419 8459
      3429 8436
TIME...MOT...LOC 2327Z 319DEG 25KT 3416 8442

$$
1 follow-up statement
408 
WWUS52 KFFC 132340
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
740 PM EDT THU JUN 13 2013

GAC057-067-121-140000-
/O.CON.KFFC.TO.W.0021.000000T0000Z-130614T0000Z/
CHEROKEE GA-COBB GA-FULTON GA-
740 PM EDT THU JUN 13 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
NORTHEASTERN FULTON...EASTERN COBB AND SOUTHERN CHEROKEE COUNTIES...

AT 736 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED NEAR SWEAT 
MOUNTAIN...MOVING SOUTHEAST AT 40 MPH. IN ADDITION...STRAIGHT LINE
WINDS OF 70 TO 80 MPH MAY BE POSSIBLE IN SANDY PLAINS...EAST PARTS OF
MARIETTA AND ROSWELL. IF YOU ARE IN THESE AREAS...EXPECT DAMAGING 
WINDS. MOVE TO A SAFE PLACE NOW! 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ALPHARETTA...ROSWELL...DOBBINS AIR RESERVE BASE...MOUNT BETHEL...
SMYRNA...SANDY SPRINGS AND JOHNS CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT FRIDAY
MORNING FOR NORTHERN GEORGIA.

&&

LAT...LON 3418 8438 3410 8425 3410 8422 3404 8412
      3403 8417 3400 8421 3400 8425 3396 8430
      3397 8434 3394 8435 3386 8451 3419 8459
TIME...MOT...LOC 2339Z 321DEG 34KT 3401 8442

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 4:31 PM EDTSpecial Weather StatementFFCDawson, Lumpkin29 min
Jun 13, 4:39 PM EDTSpecial Weather StatementFFCCatoosa, Whitfield51 min
Jun 13, 5:11 PM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Towns, Union49 min
Jun 13, 5:23 PM EDTSpecial Weather StatementFFCMurray, Whitfield37 min
Jun 13, 5:43 PM EDTSevere Thunderstorm WarningFFCGilmer, Gordon, Murray, Whitfield47 min
Jun 13, 5:51 PM EDTSevere Thunderstorm WarningFFCLumpkin, White39 min
Jun 13, 6:00 PM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Towns, Union15 min
Jun 13, 6:13 PM EDTSpecial Weather StatementFFCDawson, Gilmer, Pickens47 min
Jun 13, 6:21 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Gordon, Pickens39 min
Jun 13, 6:29 PM EDTSpecial Weather StatementFFCChattooga, Gordon31 min
Jun 13, 6:31 PM EDTSevere Thunderstorm WarningFFCBanks, Dawson, Hall, Lumpkin, White59 min
Jun 13, 6:47 PM EDTSevere Thunderstorm WarningFFCCherokee, Forsyth, Fulton, Pickens43 min
Jun 13, 6:59 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Floyd, Gordon31 min
Jun 13, 7:03 PM EDTSevere Thunderstorm WarningFFCBanks, Jackson, Madison57 min
Jun 13, 7:23 PM EDTSevere Thunderstorm WarningFFCBarrow, Gwinnett, Walton37 min
Jun 13, 7:29 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Cobb, Floyd, Paulding, Polk31 min
Jun 13, 7:40 PM EDTSevere Thunderstorm WarningFFCWalton50 min
Jun 13, 7:44 PM EDTSevere Thunderstorm WarningFFCClarke, Oconee46 min
Jun 13, 7:48 PM EDTSevere Thunderstorm WarningFFCCobb, DeKalb, Fulton, Gwinnett42 min
Jun 13, 7:54 PM EDTSevere Thunderstorm WarningFFCCarroll, Cobb, Douglas, Haralson, Paulding, Polk36 min

Nearby

Tornado Warnings in Georgia, 2013Every tornado warning in 2013Tornadoes in 2013

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.