Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 190, NWS Atlanta, GA

April 25, 2011Lumpkin County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 25, 2011, 3:19 PM EDT for Lumpkin County, Georgia. It was in force for 41 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 25, 2011, 3:19 PM EDT (19:19 UTC)
Expired: Apr 25, 2011, 4:00 PM EDT
In force: 41 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Lumpkin County, GA

The radar

The Atlanta radar (KFFC), 151 km from the middle of the area, began a volume at 19:21 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, 7.3 hours before the alert went out and 148 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: 1169 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 14 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.

725 
WUUS52 KFFC 251919
SVRFFC
GAC187-252000-
/O.NEW.KFFC.SV.W.0190.110425T1919Z-110425T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
319 PM EDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 400 PM EDT

* AT 316 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 CENTERED ON THE NORTH
  SIDE OF DAHLONEGA...MOVING NORTHEAST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PORTER SPRINGS AND TURNERS CORNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3467 8387 3463 8388 3461 8387 3455 8387
      3455 8385 3449 8396 3454 8405 3466 8399
      3468 8388
TIME...MOT...LOC 1919Z 213DEG 9KT 3456 8397

$$

2 follow-up statements

262 
WWUS52 KFFC 251944
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
344 PM EDT MON APR 25 2011

GAC187-252000-
/O.CON.KFFC.SV.W.0190.000000T0000Z-110425T2000Z/
LUMPKIN GA-
344 PM EDT MON APR 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR EASTERN LUMPKIN COUNTY...

AT 339 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATE THAT
THE STORM THAT PROMPTED THE WARNING HAD WEAKENED. HOWEVER ANOTHER 
STRONG THUNDERSTORM LOCATED 10 MILES SOUTH OF DAHLONEGA MAY BE 
CAPABLE OF PRODUCING HAIL UP TO QUARTER SIZE AS WELL AS VERY HEAVY 
RAIN AND DANGEROUS CLOUD TO GROUND LIGHTNING. THIS STORM WAS MOVING 
NORTH AT 10 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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 3467 8387 3463 8388 3461 8387 3455 8387
      3455 8385 3449 8396 3454 8405 3466 8399
      3468 8388
TIME...MOT...LOC 1942Z 191DEG 8KT 3445 8393

$$

082 
WWUS52 KFFC 251959
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
359 PM EDT MON APR 25 2011

GAC187-252007-
/O.EXP.KFFC.SV.W.0190.000000T0000Z-110425T2000Z/
LUMPKIN GA-
359 PM EDT MON APR 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN LUMPKIN COUNTY WILL
BE ALLOWED TO EXPIRE AT 400 PM EDT...

SEVERE THUNDERSTORMS ARE NO LONGER EXPECTED IN THE WARNING AREA. 
HOWEVER...ANOTHER ROUND OF HEAVY RAIN WITH OCCASIONAL CLOUD TO 
GROUND LIGHTNING CAN BE EXPECTED THROUGH 430 PM EDT IN THE AREA.

IF YOU SAW WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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 3467 8387 3463 8388 3461 8387 3455 8387
      3455 8385 3449 8396 3454 8405 3466 8399
      3468 8388
TIME...MOT...LOC 1957Z 191DEG 8KT 3448 8392

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 3:20 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Forsyth, Fulton	25 min
Apr 25, 4:57 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Gwinnett, Hall	33 min
Apr 25, 7:14 PM EDT	Severe Thunderstorm Warning	FFC	Harris	46 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.