Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Atlanta, GA

April 26, 2012Fannin County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 26, 2012, 7:29 PM EDT for Fannin County, Georgia. It was in force for 21 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
Apr 26, 2012, 7:29 PM EDT (23:29 UTC)
Expired
Apr 26, 2012, 7:50 PM EDT
In force
21 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

County Fannin County, GA

The radar

The Northeast Alabama radar (KHTX), 162 km from the middle of the area, began a volume at 23:32 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

Nashville Metro, TN (KBNA), launched 12:00Z, 11.5 hours before the alert went out and 250 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, Nashville Metro, TN at 12:00Z on 2012-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 824 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, Nashville Metro, TN at 12:00Z on 2012-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 317 square meters per square second.19395878Sfc1 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
824 J/kg
Mixed-layer CIN
-212 J/kg
Mixed-layer LCL
986 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
317 m²/s²
0-3 km storm-relative helicity
344 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.1

Open this sounding in Storm Lab

The text

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

894 
WUUS52 KFFC 262329
SVRFFC
GAC111-270015-
/O.NEW.KFFC.SV.W.0083.120426T2329Z-120427T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
729 PM EDT THU APR 26 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FANNIN COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 815 PM EDT

* AT 726 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 10 MILES WEST 
  OF MCCAYSVILLE-COPPERHILL...AND MOVING SOUTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BLUE
  RIDGE AND MORGANTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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 3499 8415 3495 8418 3489 8411 3485 8414
      3481 8414 3481 8433 3484 8438 3484 8439
      3485 8442 3485 8462 3499 8462
TIME...MOT...LOC 2329Z 306DEG 32KT 3499 8455

$$
1 follow-up statement
716 
WWUS52 KFFC 262350
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
750 PM EDT THU APR 26 2012

GAC111-262358-
/O.CAN.KFFC.SV.W.0083.000000T0000Z-120427T0015Z/
FANNIN GA-
750 PM EDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR FANNIN COUNTY IS CANCELLED...

AT 750 PM EDT... THE ONCE SEVERE STORM HAD WEAKENED BELOW SEVERE 
LEVELS AND WAS LOCATED NEAR EPWORTH AND COPPERHILL...MOVING 
SOUTHEAST AT 35 MPH. ALTHOUGH THIS STORM IS NO LONGER EXPECTED TO 
PRODUCE SEVERE WEATHER... STRONG GUSTY WINDS UP TO 40 MPH...VERY 
HEAVY RAIN...AND SMALL HAIL ARE STILL POSSIBLE.

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 3499 8415 3495 8418 3489 8411 3485 8414
      3481 8414 3481 8433 3484 8438 3484 8439
      3485 8442 3485 8462 3499 8462
TIME...MOT...LOC 2348Z 301DEG 32KT 3493 8436

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 9:16 AM EDTSpecial Weather StatementFFCFannin, Towns, Union59 min
Apr 26, 9:34 AM EDTSevere Thunderstorm WarningFFCFannin, Lumpkin, Towns, Union, White41 min
Apr 26, 10:14 AM EDTSpecial Weather StatementFFCTowns31 min
Apr 26, 6:28 PM EDTSpecial Weather StatementFFCTowns, Union47 min
Apr 26, 6:44 PM EDTSevere Thunderstorm WarningFFCTowns, Union46 min
Apr 26, 7:12 PM EDTSpecial Weather StatementFFCFannin, Murray33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.