Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 166, NWS Atlanta, GA

June 13, 2012Lumpkin County, Union County, White County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 13, 2012, 6:22 PM EDT for Lumpkin County, Union County, White County, Georgia. It was in force for 38 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
Jun 13, 2012, 6:22 PM EDT (22:22 UTC)
Expired
Jun 13, 2012, 7:00 PM EDT
In force
38 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Lumpkin County, GA, Union County, GA, White County, GA

The radar

The Greer radar (KGSP), 150 km from the middle of the area, began a volume at 22:23 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

TimeReportWhereRemark
Jun 13, 6:42 PM EDTHAIL 12 Nw Low Gap Shelter, GAPUBLIC REPORTED UP TO QUARTER SIZED HAIL COVERING THE GROUND NEAR PINE TOP ROAD.

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, 10.4 hours before the alert went out and 168 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2012-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 150 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2012-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
150 J/kg
Mixed-layer CIN
-226 J/kg
Mixed-layer LCL
878 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
13 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.

379 
WUUS52 KFFC 132222
SVRFFC
GAC187-291-311-132300-
/O.NEW.KFFC.SV.W.0166.120613T2222Z-120613T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
622 PM EDT WED JUN 13 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHEASTERN LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA
  CENTRAL UNION COUNTY IN NORTH CENTRAL GEORGIA
  NORTHWESTERN WHITE COUNTY IN NORTHEAST GEORGIA

* UNTIL 700 PM EDT

* AT 619 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 LOW GAP
  SHELTER...MOVING SOUTHWEST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WHITLEY GAP SHELTER...OWLTOWN...VOGEL STATE PARK...BLOOD MOUNTAIN
  SHELTER AND WOODS HOLE SHELTER.

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...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 3481 8378 3479 8378 3469 8382 3475 8405
      3485 8392
TIME...MOT...LOC 2222Z 056DEG 6KT 3480 8387

$$
1 follow-up statement
532 
WWUS52 KFFC 132253
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
653 PM EDT WED JUN 13 2012

GAC187-291-311-132301-
/O.EXP.KFFC.SV.W.0166.000000T0000Z-120613T2300Z/
WHITE GA-UNION GA-LUMPKIN GA-
653 PM EDT WED JUN 13 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN
LUMPKIN...EAST CENTRAL UNION AND NORTHWESTERN WHITE COUNTIES EXPIRES
AT 700 PM EDT...

AT 647 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL AND WIND 
GUSTS TO NEAR 50 MPH. THIS STORM WAS LOCATED NEAR VOGEL STATE 
PARK...MOVING SOUTH AT 5 MPH. THIS STORM WAS WEAKENING...AND AN 
ADDITIONAL WARNING FOR THIS STORM IS NOT ANTICIPATED AT THIS TIME.

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 3481 8378 3479 8378 3469 8382 3475 8405
      3485 8392
TIME...MOT...LOC 2251Z 037DEG 5KT 3476 8388

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 8:49 PM EDTSpecial Weather StatementFFCTaliaferro, Warren41 min
Jun 13, 5:59 PM EDTSpecial Weather StatementFFCWhite46 min
Jun 13, 7:26 PM EDTSpecial Weather StatementFFCFulton34 min
Jun 13, 7:50 PM EDTSpecial Weather StatementFFCClayton, Fulton25 min
Jun 13, 7:59 PM EDTSpecial Weather StatementFFCCrawford46 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012Every 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.