Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 349, NWS Atlanta, GA

December 20, 2012Crisp County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Dec 20, 2012, 3:33 PM EST for Crisp County, Georgia. It was in force for 22 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: Dec 20, 2012, 3:33 PM EST (20:33 UTC)
Expired: Dec 20, 2012, 3:55 PM EST
In force: 22 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Crisp County, GA

The radar

The Robins AFB radar (KJGX), 95 km from the middle of the area, began a volume at 20:35 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.6 hours before the alert went out and 173 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2063 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 202 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.

092 
WUUS52 KFFC 202033
SVRFFC
GAC081-202115-
/O.NEW.KFFC.SV.W.0349.121220T2033Z-121220T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
333 PM EST THU DEC 20 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CRISP COUNTY IN CENTRAL GEORGIA

* UNTIL 415 PM EST

* AT 330 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR ARABI...MOVING EAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EAST
  CRISP AND HATLEY.

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 3193 8379 3198 8361 3185 8360 3181 8361
      3180 8361 3180 8364 3180 8379
TIME...MOT...LOC 2033Z 261DEG 28KT 3187 8370

$$

1 follow-up statement

481 
WWUS52 KFFC 202055
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
355 PM EST THU DEC 20 2012

GAC081-202101-
/O.CAN.KFFC.SV.W.0349.000000T0000Z-121220T2115Z/
CRISP GA-
355 PM EST THU DEC 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CRISP COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND MOVED EAST OF THE COUNTY. ALTHOUGH 
A STRONG SHOWER OR WEAK THUNDERSTORM COULD STILL PRODUCE OCCASIONAL 
WIND GUSTS TO NEAR 40 MPH... SEVERE STORMS ARE NO LONGER EXPECTED 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 3193 8379 3198 8361 3185 8360 3181 8361
      3180 8361 3180 8364 3180 8379
TIME...MOT...LOC 2051Z 261DEG 28KT 3189 8354

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 12:55 PM EST	Special Weather Statement	FFC	Heard, Troup	50 min
Dec 20, 1:07 PM EST	Special Weather Statement	FFC	Harris, Muscogee	38 min
Dec 20, 1:13 PM EST	Special Weather Statement	FFC	Coweta, Meriwether	77 min
Dec 20, 1:27 PM EST	Special Weather Statement	FFC	Chattahoochee, Stewart	63 min
Dec 20, 1:29 PM EST	Special Weather Statement	FFC	Chattahoochee, Stewart	61 min
Dec 20, 1:43 PM EST	Special Weather Statement	FFC	Muscogee	32 min
Dec 20, 1:45 PM EST	Special Weather Statement	FFC	Fayette	30 min
Dec 20, 2:00 PM EST	Special Weather Statement	FFC	Talbot	45 min
Dec 20, 2:01 PM EST	Special Weather Statement	FFC	Pike	29 min
Dec 20, 2:07 PM EST	Special Weather Statement	FFC	Marion	38 min
Dec 20, 2:17 PM EST	Special Weather Statement	FFC	Webster	43 min
Dec 20, 2:26 PM EST	Special Weather Statement	FFC	Lamar, Pike, Upson	34 min
Dec 20, 2:35 PM EST	Special Weather Statement	FFC	Macon, Schley, Sumter	55 min
Dec 20, 2:43 PM EST	Special Weather Statement	FFC	Crisp, Dooly	47 min
Dec 20, 2:47 PM EST	Special Weather Statement	FFC	Taylor	43 min
Dec 20, 3:29 PM EST	Special Weather Statement	FFC	Pulaski, Wilcox	31 min
Dec 20, 3:31 PM EST	Special Weather Statement	FFC	Crisp	29 min
Dec 20, 3:42 PM EST	Special Weather Statement	FFC	Jones	33 min
Dec 20, 4:04 PM EST	Special Weather Statement	FFC	Dodge	26 min
Dec 20, 4:10 PM EST	River Flood Warning	FFC	Forsyth	7 hr

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.