Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 139, NWS Atlanta, GA

May 31, 2012Glascock County, Warren County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 31, 2012, 6:55 PM EDT for Glascock County, Warren County, Georgia. It was in force for 50 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: May 31, 2012, 6:55 PM EDT (22:55 UTC)
Expired: May 31, 2012, 7:45 PM EDT
In force: 50 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Glascock County, GA, Warren County, GA

The radar

The Robins AFB radar (KJGX), 100 km from the middle of the area, began a volume at 22:59 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, 10.9 hours before the alert went out and 172 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: 87 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 2029 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 27 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.

955 
WUUS52 KFFC 312255
SVRFFC
GAC125-301-312345-
/O.NEW.KFFC.SV.W.0139.120531T2255Z-120531T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
655 PM EDT THU MAY 31 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN GLASCOCK COUNTY IN EAST CENTRAL GEORGIA
  CENTRAL WARREN COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 745 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 6 MILES
  NORTHWEST OF GIBSON...MOVING NORTH AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WARRENTON...NORWOOD AND CAMAK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3319 8261 3324 8275 3325 8275 3327 8278
      3331 8279 3361 8265 3360 8264 3346 8258
      3341 8254 3336 8254 3334 8252
TIME...MOT...LOC 2254Z 202DEG 11KT 3331 8267

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 9:55 PM EDT	Special Weather Statement	FFC	Toombs	50 min
May 30, 10:02 PM EDT	Special Weather Statement	FFC	Houston	28 min
May 31, 12:53 PM EDT	Special Weather Statement	FFC	Bleckley	37 min
May 31, 4:34 PM EDT	Special Weather Statement	FFC	Emanuel	26 min
May 31, 4:58 PM EDT	Special Weather Statement	FFC	Jefferson	32 min
May 31, 5:06 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson	39 min
May 31, 5:16 PM EDT	Special Weather Statement	FFC	Gilmer	29 min
May 31, 5:24 PM EDT	Special Weather Statement	FFC	Emanuel	36 min
May 31, 5:44 PM EDT	Special Weather Statement	FFC	Gilmer	61 min
May 31, 6:39 PM EDT	Special Weather Statement	FFC	Glascock, Warren	36 min
May 31, 6:44 PM EDT	Special Weather Statement	FFC	Taylor	31 min
May 31, 7:16 PM EDT	Special Weather Statement	FFC	Upson	29 min
May 31, 7:48 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Pike, Upson	42 min
May 31, 7:59 PM EDT	Special Weather Statement	FFC	Wheeler	31 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012 Every severe thunderstorm warning in 2012

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.