Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 138, NWS Atlanta, GA

May 31, 2012Jefferson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 31, 2012, 5:06 PM EDT for Jefferson County, Georgia. It was in force for 39 min. 2 reports 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: May 31, 2012, 5:06 PM EDT (21:06 UTC)
Expired: May 31, 2012, 5:45 PM EDT
In force: 39 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Jefferson County, GA

The radar

The Robins AFB radar (KJGX), 104 km from the middle of the area, began a volume at 21:07 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
May 31, 5:08 PM EDT	TSTM WND DMG	1 Se Louisville, GA	911 CENTER REPORTED A TREE DOWN ON POWER LINES ALONG MOORE STREET.
May 31, 5:10 PM EDT	TSTM WND DMG	Louisville, GA	911 CENTER REPORTED A TREE DOWN BLOCKING U.S. HWY 1.

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, 9.1 hours before the alert went out and 206 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.

707 
WUUS52 KFFC 312106
SVRFFC
GAC163-312145-
/O.NEW.KFFC.SV.W.0138.120531T2106Z-120531T2145Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 545 PM EDT

* AT 503 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
  LOUISVILLE...MOVING NORTH AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 3311 8228 3308 8228 3293 8227 3286 8229
      3284 8231 3286 8245 3320 8247 3318 8226
TIME...MOT...LOC 2105Z 186DEG 9KT 3296 8236

$$

2 follow-up statements

461 
WWUS52 KFFC 312138
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
538 PM EDT THU MAY 31 2012

GAC163-312145-
/O.CON.KFFC.SV.W.0138.000000T0000Z-120531T2145Z/
JEFFERSON GA-
538 PM EDT THU MAY 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EASTERN JEFFERSON COUNTY...

AT 533 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 7
MILES NORTHEAST OF LOUISVILLE...MOVING NORTH AT 15 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

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 3311 8228 3290 8228 3293 8243 3320 8242
      3318 8226
TIME...MOT...LOC 2138Z 202DEG 14KT 3310 8232

$$

509 
WWUS52 KFFC 312146
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
546 PM EDT THU MAY 31 2012

GAC163-312154-
/O.EXP.KFFC.SV.W.0138.000000T0000Z-120531T2145Z/
JEFFERSON GA-
546 PM EDT THU MAY 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN JEFFERSON COUNTY
EXPIRES AT 545 PM EDT...

AT 542 PM EDT...DOPPLER RADAR INDICATED THAT THE STORM NEAR  
LOUISVILLE WAS WEAKENING AND THUS THE SEVERE THUNDERSTORM WARNING 
WILL BE ALLOWED TO EXPIRE. THIS STORM WAS LOCATED 11 MILES NORTHEAST 
OF LOUISVILLE...MOVING NORTH AT 15 MPH.

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 3311 8228 3290 8228 3293 8243 3320 8242
      3318 8226
TIME...MOT...LOC 2144Z 202DEG 14KT 3314 8230

$$

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, 5:16 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, 6:55 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Warren	50 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.