Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 413, NWS Atlanta, GA

July 2, 2011Lamar County, Spalding County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 2, 2011, 6:53 PM EDT for Lamar County, Spalding County, Georgia. It was in force for 22 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: Jul 2, 2011, 6:53 PM EDT (22:53 UTC)
Expired: Jul 2, 2011, 7:15 PM EDT
In force: 22 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Lamar County, GA, Spalding County, GA

The radar

The Atlanta radar (KFFC), 47 km from the middle of the area, began a volume at 22:53 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
Jul 2, 7:15 PM EDT	TSTM WND DMG	Chappel Mill, GA	SEVERAL TREES DOWN ACROSS THE FAR NORTH CENTRAL AND NORTHEAST PART OF THE COUNTY...ESPECIALLY NEAR CHAPPEL MILL. SOME ROADS WERE BLOCKED FOR A BRIEF PERIOD...INCLUDING ONE LANE OF INTERSTATE-75 IN THE FAR NORTHEAST CORNER OF THE COUNTY. SCATTERED POWER OUTAGES

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, 10.9 hours before the alert went out and 43 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.

662 
WUUS52 KFFC 022253
SVRFFC
GAC171-255-022315-
/O.NEW.KFFC.SV.W.0413.110702T2253Z-110702T2315Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 715 PM EDT

* AT 649 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 CHAPPEL MILL...
  ALONG THE SPALDING...LAMAR COUNTY LINES...MOVING SOUTHWEST AT 15 
MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ALTHOUGH THE PARENT THUNDERSTORM IS IN NORTHEAST LAMAR 
COUNTY...DOPPLER
RADAR INDICATES THAT STRONG WINDS ARE BLOWING OUT OF THE THUNDERSTORM
INTO FAR SOUTHEAST SPALDING COUNTY AND MAY CAUSE DAMAGE.

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 3304 8425 3317 8425 3324 8419 3323 8412
      3320 8412 3320 8405 3309 8404 3296 8412
      3299 8413 3299 8427 3303 8427
TIME...MOT...LOC 2251Z 030DEG 12KT 3317 8413

$$

1 follow-up statement

108 
WWUS52 KFFC 022305
SVSFFC

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

GAC255-022315-
/O.CAN.KFFC.SV.W.0413.000000T0000Z-110702T2315Z/
SPALDING GA-
705 PM EDT SAT JUL 2 2011

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

STRONG WINDS ASSOCIATED WITH THE THUNDERSTORM IN LAMAR COUNTY HAVE 
SUBSIDED. SEVERE WEATHER IS NO LONGER INDICATED IN SPALDING COUNTY 
AT THIS TIME.

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 8427 3304 8425 3317 8425 3319 8423
      3318 8422 3318 8413 3320 8412 3320 8405
      3309 8404 3296 8412 3299 8413 3299 8427
TIME...MOT...LOC 2305Z 030DEG 12KT 3313 8416

$$

GAC171-022315-
/O.CON.KFFC.SV.W.0413.000000T0000Z-110702T2315Z/
LAMAR GA-
705 PM EDT SAT JUL 2 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR LAMAR COUNTY...

AT 702 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
LIBERTY HILL...MOVING SOUTHWEST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GOGGINS...MILNER...ALDORA...BARNESVILLE 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 8427 3304 8425 3317 8425 3319 8423
      3318 8422 3318 8413 3320 8412 3320 8405
      3309 8404 3296 8412 3299 8413 3299 8427
TIME...MOT...LOC 2305Z 030DEG 12KT 3313 8416

$$



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, 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, 7:16 PM EDT	Severe Thunderstorm Warning	FFC	Lamar	29 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.