Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 174, NWS Atlanta, GA

April 16, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 16, 2011, 1:54 AM EDT for 4 counties in Georgia. It was in force for 51 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
Apr 16, 2011, 1:54 AM EDT (05:54 UTC)
Expired
Apr 16, 2011, 2:45 AM EDT
In force
51 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Carroll County, GA, Coweta County, GA, Fulton County, GA, Meriwether County, GA

The radar

The Atlanta radar (KFFC), 20 km from the middle of the area, began a volume at 05:57 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
Apr 16, 2:30 AM EDTTSTM WND DMGPalmetto, GASEVERAL TREES DOWN.

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
Apr 15, 9:12 PM EDTTornado WatchSPC9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.9 hours before the alert went out and 26 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 00:00Z on 2011-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 406 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2011-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 373 square meters per square second.19395878Sfc1 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
406 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
1138 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
373 m²/s²
0-3 km storm-relative helicity
566 m²/s²
Significant tornado parameter
1.3
Supercell composite
11.3

Open this sounding in Storm Lab

The text

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

955 
WUUS52 KFFC 160554
SVRFFC
GAC045-077-121-199-160645-
/O.NEW.KFFC.SV.W.0174.110416T0554Z-110416T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
154 AM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN FULTON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN CARROLL COUNTY IN NORTHWEST GEORGIA
  COWETA COUNTY IN WEST CENTRAL GEORGIA
  NORTHERN MERIWETHER COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 245 AM EDT

* AT 150 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  10 MILES WEST OF WHITESBURG TO 10 MILES WEST OF GRANTVILLE TO 14
  MILES WEST OF GRANTVILLE...MOVING NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LONE
  OAK...NEWNAN...LUTHERSVILLE...MORELAND...CHATTAHOOCHEE HILL
  COUNTRY...PALMETTO...SHARPSBURG...TURIN...HARALSON AND SENOIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS...WITH SEVERAL 
REPORTS OF DAMAGE IN EASTERN ALABAMA. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

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 3361 8490 3357 8491 3357 8481 3363 8475
      3366 8466 3351 8460 3348 8463 3343 8463
      3336 8459 3332 8452 3320 8449 3310 8486
      3322 8486 3324 8495 3328 8495 3354 8506
TIME...MOT...LOC 0553Z 244DEG 42KT 3346 8504 3329 8497
          3317 8503

$$
2 follow-up statements
946 
WWUS52 KFFC 160616
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
216 AM EDT SAT APR 16 2011

GAC199-160626-
/O.CAN.KFFC.SV.W.0174.000000T0000Z-110416T0645Z/
MERIWETHER GA-
216 AM EDT SAT APR 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MERIWETHER COUNTY IS
CANCELLED...

THE PORTION OF THE THUNDERSTORM MOVING THROUGH MERIWETHER COUNTY HAS 
DECREASED IN INTENSITY...THUS THE WARNING HAS BEEN CANCELLED.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

LAT...LON 3361 8490 3357 8491 3357 8481 3363 8475
      3366 8466 3351 8460 3348 8463 3343 8463
      3336 8459 3332 8452 3324 8495 3353 8501
TIME...MOT...LOC 0616Z 223DEG 54KT 3371 8476 3354 8469
          3342 8476

$$

GAC045-077-121-160645-
/O.CON.KFFC.SV.W.0174.000000T0000Z-110416T0645Z/
CARROLL GA-COWETA GA-FULTON GA-
216 AM EDT SAT APR 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR SOUTHWESTERN FULTON...COWETA AND SOUTHEASTERN CARROLL COUNTIES...

AT 211 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 8 MILES NORTHWEST OF CHATTAHOOCHEE HILL COUNTRY TO MADRAS TO
NEWNAN...MOVING NORTHEAST AT 60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THOMAS
CROSSROADS...CAMPBELLTON...PALMETTO AND CANNONGATE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

&&

LAT...LON 3361 8490 3357 8491 3357 8481 3363 8475
      3366 8466 3351 8460 3348 8463 3343 8463
      3336 8459 3332 8452 3324 8495 3353 8501
TIME...MOT...LOC 0616Z 223DEG 54KT 3371 8476 3354 8469
          3342 8476

$$
799 
WWUS52 KFFC 160631
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
231 AM EDT SAT APR 16 2011

GAC045-160641-
/O.CAN.KFFC.SV.W.0174.000000T0000Z-110416T0645Z/
CARROLL GA-
231 AM EDT SAT APR 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED OUT OF 
CARROLL COUNTY...THUS THE WARNING HAS BEEN CANCELLED.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

LAT...LON 3328 8474 3352 8481 3355 8483 3357 8481
      3363 8475 3363 8474 3364 8473 3366 8466
      3351 8460 3348 8463 3343 8463 3336 8459
      3332 8452
TIME...MOT...LOC 0631Z 226DEG 42KT 3380 8463 3363 8456
          3351 8463

$$

GAC077-121-160645-
/O.CON.KFFC.SV.W.0174.000000T0000Z-110416T0645Z/
COWETA GA-FULTON GA-
231 AM EDT SAT APR 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR SOUTHWESTERN FULTON AND EASTERN COWETA COUNTIES...

AT 229 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 10 MILES NORTH OF CAMPBELLTON TO CAMPBELLTON TO CANNONGATE... 
MOVING NORTHEAST AT 50 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. 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 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 TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT SATURDAY MORNING
FOR GEORGIA.

&&

LAT...LON 3328 8474 3352 8481 3355 8483 3357 8481
      3363 8475 3363 8474 3364 8473 3366 8466
      3351 8460 3348 8463 3343 8463 3336 8459
      3332 8452
TIME...MOT...LOC 0631Z 226DEG 42KT 3380 8463 3363 8456
          3351 8463

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 8:02 PM EDTTornado WarningFFCCobb, DeKalb, Fulton43 min
Apr 15, 8:12 PM EDTSevere Thunderstorm WarningFFCLamar, Meriwether, Pike, Talbot, Upson48 min
Apr 15, 8:19 PM EDTSevere Thunderstorm WarningFFCBarrow, Gwinnett41 min
Apr 15, 8:28 PM EDTSevere Thunderstorm WarningFFCForsyth, Hall47 min
Apr 15, 8:45 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas, Paulding45 min
Apr 15, 8:56 PM EDTSevere Thunderstorm WarningFFCButts, Lamar, Monroe, Pike, Upson49 min
Apr 15, 9:18 PM EDTSevere Thunderstorm WarningFFCButts, Jasper, Jones, Monroe42 min
Apr 15, 9:19 PM EDTSevere Thunderstorm WarningFFCDeKalb, Forsyth, Fulton, Gwinnett41 min
Apr 15, 10:44 PM EDTRiver Flood WarningFFCForsyth, Fulton40 hr
Apr 15, 11:44 PM EDTRiver Flood WarningFFCCobb6 hr
Apr 16, 12:17 AM EDTRiver Flood WarningFFCForsyth14 hr
Apr 16, 12:47 AM EDTRiver Flood WarningFFCDade34 hr
Apr 16, 1:25 AM EDTSevere Thunderstorm WarningFFCHeard, Troup50 min
Apr 16, 1:40 AM EDTSevere Thunderstorm WarningFFCBartow, Carroll, Haralson, Paulding50 min
Apr 16, 2:10 AM EDTTornado WarningFFCCarroll, Cobb, Douglas, Fulton, Paulding50 min
Apr 16, 2:38 AM EDTSevere Thunderstorm WarningFFCClayton, DeKalb, Fayette, Fulton, Henry, Newton and 1 more52 min
Apr 16, 2:46 AM EDTSevere Thunderstorm WarningFFCHarris44 min
Apr 16, 3:15 AM EDTSevere Thunderstorm WarningFFCHarris, Muscogee45 min
Apr 16, 3:26 AM EDTSevere Thunderstorm WarningFFCMeriwether49 min
Apr 16, 3:35 AM EDTWind AdvisoryFFCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more16 hr
Apr 16, 3:39 AM EDTTornado WarningFFCHarris, Talbot36 min
Apr 16, 3:51 AM EDTSevere Thunderstorm WarningFFCLamar, Meriwether, Pike, Spalding39 min
Apr 16, 4:04 AM EDTSevere Thunderstorm WarningFFCMeriwether, Pike, Talbot, Upson26 min
Apr 16, 4:40 AM EDTSevere Thunderstorm WarningFFCChattahoochee, Macon, Marion, Muscogee, Talbot50 min
Apr 16, 4:45 AM EDTTornado WarningFFCChattahoochee, Marion, Muscogee45 min
Apr 16, 5:12 AM EDTSevere Thunderstorm WarningFFCChattahoochee, Crawford, Marion, Talbot, Taylor, Upson48 min
Apr 16, 5:48 AM EDTTornado WarningFFCBibb, Crawford, Monroe, Taylor42 min
Apr 16, 6:14 AM EDTTornado WarningFFCBaldwin, Jones, Putnam46 min
Apr 16, 6:26 AM EDTRiver Flood WarningFFCWhitfield64 hr
Apr 16, 8:42 AM EDTRiver Flood WarningFFCCobb7 hr
Apr 16, 10:34 AM EDTRiver Flood WarningFFCGordon, Murray, Whitfield28 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2011Every 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.