Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 481, NWS Atlanta, GA

August 21, 2011Meriwether County, Pike County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 21, 2011, 9:11 PM EDT for Meriwether County, Pike County, Georgia. It was in force for 49 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 21, 2011, 9:11 PM EDT (01:11 UTC)
Expired: Aug 21, 2011, 10:00 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Meriwether County, GA, Pike County, GA

The radar

The Atlanta radar (KFFC), 29 km from the middle of the area, began a volume at 01:11 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 21, 9:15 PM EDT	TSTM WND DMG	Rocky Mount, GA	MERIWETHER COUNTY EMERGENCY MANAGEMENT REPORTED AROUND A DOZEN DOWNED TREES IN THE ROCKY MOUNT AREA ALONG WITH SOME DOWNED POWERLINES AND DIME SIZED HAIL.

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 00:00Z, 1.2 hours before the alert went out and 29 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: 2527 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

694 
WUUS52 KFFC 220111
SVRFFC
GAC199-231-220200-
/O.NEW.KFFC.SV.W.0481.110822T0111Z-110822T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
911 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MERIWETHER COUNTY IN WEST CENTRAL GEORGIA
  PIKE COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 1000 PM EDT

* AT 906 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 GAY...
  MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MOLENA...CONCORD...MEANSVILLE AND ZEBULON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3323 8468 3322 8453 3321 8449 3319 8449
      3320 8447 3310 8424 3308 8424 3306 8425
      3299 8431 3299 8448 3297 8450 3297 8453
      3312 8476
TIME...MOT...LOC 0111Z 303DEG 14KT 3315 8461

$$

1 follow-up statement

926 
WWUS52 KFFC 220132
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
932 PM EDT SUN AUG 21 2011

GAC199-231-220200-
/O.CON.KFFC.SV.W.0481.000000T0000Z-110822T0200Z/
PIKE GA-MERIWETHER GA-
932 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR NORTHEASTERN MERIWETHER AND PIKE COUNTIES...

AT 928 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
ROCKY MOUNT...MOVING SOUTHEAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WOOSTER...ALVATON...CONCORD...HILLTOP...LIFSEY SPRINGS...
HOLLONVILLE...MEANSVILLE...MOLENA...ZEBULON...IMLAC AND GAY.

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 3323 8468 3322 8453 3321 8449 3319 8449
      3320 8447 3310 8424 3308 8424 3306 8425
      3299 8431 3299 8448 3297 8450 3297 8453
      3312 8476
TIME...MOT...LOC 0132Z 303DEG 7KT 3315 8465

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 8:08 PM EDT	Special Weather Statement	FFC	Walton	52 min
Aug 21, 8:28 PM EDT	Special Weather Statement	FFC	Gwinnett	32 min
Aug 21, 8:34 PM EDT	Special Weather Statement	FFC	Barrow	26 min
Aug 21, 8:54 PM EDT	Special Weather Statement	FFC	Meriwether	36 min
Aug 21, 9:29 PM EDT	Special Weather Statement	FFC	Madison	31 min
Aug 21, 10:04 PM EDT	Special Weather Statement	FFC	Madison	41 min
Aug 21, 10:45 PM EDT	Special Weather Statement	FFC	Wilkes	30 min
Aug 21, 10:58 PM EDT	Special Weather Statement	FFC	Morgan	32 min
Aug 21, 11:12 PM EDT	Special Weather Statement	FFC	Lamar, Pike	48 min
Aug 21, 11:14 PM EDT	Special Weather Statement	FFC	Wilkes	46 min
Aug 22, 12:00 AM EDT	Special Weather Statement	FFC	Wilkes	45 min
Aug 22, 12:05 AM EDT	Special Weather Statement	FFC	Greene	40 min
Aug 22, 12:37 AM EDT	Special Weather Statement	FFC	Glascock, Hancock, Warren	38 min
Aug 22, 1:01 AM EDT	Special Weather Statement	FFC	Hancock	29 min
Aug 22, 5:39 PM EDT	Special Weather Statement	FFC	Telfair	36 min
Aug 22, 5:55 PM EDT	Special Weather Statement	FFC	Crisp	35 min
Aug 22, 6:06 PM EDT	Special Weather Statement	FFC	Wheeler	39 min
Aug 22, 7:07 PM EDT	Special Weather Statement	FFC	Dodge, Telfair, Wheeler	38 min
Aug 22, 7:50 PM EDT	Special Weather Statement	FFC	Montgomery, Treutlen	40 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.