Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 484, NWS Atlanta, GA

September 25, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 25, 2011, 12:28 PM EDT for 4 counties in Georgia. It was in force for 47 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: Sep 25, 2011, 12:28 PM EDT (16:28 UTC)
Expired: Sep 25, 2011, 1:15 PM EDT
In force: 47 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Greene County, GA, Oglethorpe County, GA, Taliaferro County, GA, Wilkes County, GA

The radar

The Robins AFB radar (KJGX), 130 km from the middle of the area, began a volume at 16:29 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, 4.5 hours before the alert went out and 152 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1541 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

475 
WUUS52 KFFC 251628
SVRFFC
GAC133-221-265-317-251715-
/O.NEW.KFFC.SV.W.0484.110925T1628Z-110925T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1228 PM EDT SUN SEP 25 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GREENE COUNTY IN EAST CENTRAL GEORGIA
  NORTHWESTERN TALIAFERRO COUNTY IN EAST CENTRAL GEORGIA
  NORTHWESTERN WILKES COUNTY IN EAST CENTRAL GEORGIA
  EASTERN OGLETHORPE COUNTY IN NORTHEAST GEORGIA

* UNTIL 115 PM EDT

* AT 1224 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
  WOODVILLE...MOVING NORTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAYLE
  AND TIGNALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS 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 3361 8303 3369 8318 3401 8290 3399 8284
      3386 8266
TIME...MOT...LOC 1628Z 221DEG 17KT 3370 8303

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 12:27 PM EDT	Special Weather Statement	FFC	Wilkes	33 min
Sep 25, 1:11 PM EDT	Severe Thunderstorm Warning	FFC	Wilkes	49 min
Sep 25, 1:17 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	28 min
Sep 25, 1:51 PM EDT	Special Weather Statement	FFC	Emanuel	39 min
Sep 25, 2:07 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	38 min
Sep 25, 2:08 PM EDT	Special Weather Statement	FFC	Emanuel	37 min
Sep 25, 2:24 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Jefferson, Johnson	35 min
Sep 25, 2:55 PM EDT	Special Weather Statement	FFC	Jefferson	50 min
Sep 25, 3:13 PM EDT	Special Weather Statement	FFC	Jefferson, Johnson, Telfair, Treutlen, Wheeler	32 min
Sep 25, 3:32 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Warren	21 min
Sep 25, 3:42 PM EDT	Special Weather Statement	FFC	Jefferson, Johnson	48 min
Sep 25, 4:16 PM EDT	Special Weather Statement	FFC	Johnson	29 min
Sep 25, 4:33 PM EDT	Special Weather Statement	FFC	Washington	27 min
Sep 25, 4:37 PM EDT	Special Weather Statement	FFC	Greene	23 min
Sep 25, 5:00 PM EDT	Special Weather Statement	FFC	Taliaferro	30 min
Sep 25, 5:18 PM EDT	Special Weather Statement	FFC	Greene	27 min
Sep 25, 5:35 PM EDT	Special Weather Statement	FFC	Toombs	25 min
Sep 25, 5:46 PM EDT	Special Weather Statement	FFC	Greene, Putnam	29 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.