Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 414, NWS Atlanta, GA

July 2, 2011Lamar County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 2, 2011, 7:16 PM EDT for Lamar County, Georgia. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 2, 2011, 7:16 PM EDT (23:16 UTC)
Expired: Jul 2, 2011, 7:45 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Lamar County, GA

The radar

The Atlanta radar (KFFC), 53 km from the middle of the area, began a volume at 23:19 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.3 hours before the alert went out and 50 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: 1128 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1177 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

247 
WUUS52 KFFC 022316
SVRFFC
GAC171-022345-
/O.NEW.KFFC.SV.W.0414.110702T2316Z-110702T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
716 PM EDT SAT JUL 2 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS REISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAMAR COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 745 PM EDT

* AT 710 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED 
  HAIL...AND DAMAGING WINDS UP TO 60 MPH CONTINUED IN CENTRAL LAMAR
  COUNTY NEAR BARNESVILLE...MOVING SOUTHWEST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MILNER AND ALDORA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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...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 3303 8426 3306 8425 3315 8418 3310 8404
      3295 8404 3293 8406 3294 8412 3299 8413
      3299 8427 3303 8427
TIME...MOT...LOC 2315Z 026DEG 4KT 3309 8411

$$



19

2 follow-up statements

615 
WWUS52 KFFC 022335
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
735 PM EDT SAT JUL 2 2011

GAC171-022345-
/O.CON.KFFC.SV.W.0414.000000T0000Z-110702T2345Z/
LAMAR GA-
735 PM EDT SAT JUL 2 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR LAMAR COUNTY...

AT 732 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A CLUSTER OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF 
PRODUCING QUARTER SIZED HAIL AND WIND GUSTS TO 60 MPH. THESE STORMS 
EXTENDED FROM REDBONE...TO BARNESVILLE...TO MILNER...MOVING 
SOUTHWEST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALDORA 
AND PIEDMONT.

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.

&&

LAT...LON 3303 8426 3306 8425 3315 8418 3310 8404
      3295 8404 3293 8406 3294 8412 3299 8413
      3299 8427 3303 8427
TIME...MOT...LOC 2333Z 026DEG 4KT 3307 8412

$$



19

475 
WWUS52 KFFC 022342
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
742 PM EDT SAT JUL 2 2011

GAC171-022351-
/O.EXP.KFFC.SV.W.0414.000000T0000Z-110702T2345Z/
LAMAR GA-
742 PM EDT SAT JUL 2 2011

...THE SEVERE THUNDERSTORM WARNING FOR LAMAR COUNTY WILL BE ALLOWED 
TO EXPIRE AT 745 PM EDT...

AT 740 PM EDT...THUNDERSTORMS ACROSS LAMAR COUNTY CONTINUE TO WEAKEN 
AND ARE NO LONGER SEVERE. HOWEVER...MODERATE RAIN AND OCCASIONAL 
CLOUD-TO-GROUND LIGHTNING WILL CONTINUE ACROSS THE SOUTHERN HALF OF 
LAMAR COUNTY FOR ANOTHER 30 MINUTES OR SO BEFORE ENDING. THE STORMS 
WERE LOCATED BETWEEN REDBONE AND MILNER...MOVING SOUTHWEST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
REDBONE...ALDORA AND PIEDMONT.

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.

LAT...LON 3303 8426 3306 8425 3315 8418 3310 8404
      3295 8404 3293 8406 3294 8412 3299 8413
      3299 8427 3303 8427
TIME...MOT...LOC 2341Z 026DEG 4KT 3306 8412

$$



19

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 8:09 PM EDT	Special Weather Statement	FFC	White	36 min
Jul 1, 8:15 PM EDT	Severe Thunderstorm Warning	FFC	White	30 min
Jul 2, 3:08 PM EDT	Special Weather Statement	FFC	Washington	37 min
Jul 2, 3:24 PM EDT	Severe Thunderstorm Warning	FFC	Washington	36 min
Jul 2, 4:09 PM EDT	Special Weather Statement	FFC	Washington	36 min
Jul 2, 4:59 PM EDT	Special Weather Statement	FFC	Hancock	31 min
Jul 2, 6:14 PM EDT	Special Weather Statement	FFC	Butts	31 min
Jul 2, 6:16 PM EDT	Special Weather Statement	FFC	Butts	29 min
Jul 2, 6:36 PM EDT	Special Weather Statement	FFC	Muscogee	24 min
Jul 2, 6:45 PM EDT	Special Weather Statement	FFC	Lamar	30 min
Jul 2, 6:53 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Spalding	22 min
Jul 2, 7:02 PM EDT	Special Weather Statement	FFC	Newton	28 min
Jul 2, 7:09 PM EDT	Special Weather Statement	FFC	Upson	36 min
Jul 2, 7:12 PM EDT	Special Weather Statement	FFC	Muscogee	33 min
Jul 2, 7:29 PM EDT	Special Weather Statement	FFC	Pike	31 min
Jul 2, 7:32 PM EDT	Special Weather Statement	FFC	Clayton, Fayette	28 min
Jul 2, 7:38 PM EDT	Severe Thunderstorm Warning	FFC	Pike	23 min
Jul 2, 7:50 PM EDT	Special Weather Statement	FFC	Oglethorpe	25 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.