Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 195, NWS Atlanta, GA

April 25, 2011Cherokee County, Dawson County, Pickens County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 25, 2011, 8:08 PM EDT for Cherokee County, Dawson County, Pickens County, Georgia. It was in force for 52 min. 4 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: Apr 25, 2011, 8:08 PM EDT (00:08 UTC)
Expired: Apr 25, 2011, 9:00 PM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Cherokee County, GA, Dawson County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 103 km from the middle of the area, began a volume at 00:09 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
Apr 25, 8:10 PM EDT	HAIL 1	Canton, GA	PUBLIC REPORTED QUARTER-SIZED HAIL IN CHEROKEE COUNTY.
Apr 25, 8:15 PM EDT	HAIL 1	4 Se Buffington, GA	PUBLIC REPORTS HAIL OF AT LEAST THE SIZE OF A QUARTER COVERING DECK AND LAWN.
Apr 25, 8:20 PM EDT	HAIL 1	3 Se Buffington, GA	PUBLIC REPORTED QUARTER-SIZED HAIL NEAR CANTON.
Apr 25, 8:20 PM EDT	HAIL 1	4 E Canton, GA	CHEROKEE COUNTY EMERGENCY MANAGEMENT RELAYED REPORTS OF QUARTER-SIZED HAIL 4.5 MILES EAST OF CANTON.

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 00:00Z, 0.1 hours before the alert went out and 101 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: 1305 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1272 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

650 
WUUS52 KFFC 260008
SVRFFC
GAC057-085-227-260100-
/O.NEW.KFFC.SV.W.0195.110426T0008Z-110426T0100Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHWESTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  PICKENS COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 900 PM EDT

* AT 805 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
  BUFFINGTON...MOVING NORTH AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FREE
  HOME...BALL GROUND...NELSON...JASPER AND TALKING ROCK.

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 3449 8414 3433 8420 3433 8426 3418 8426
      3419 8433 3417 8436 3413 8436 3412 8438
      3411 8441 3413 8450 3453 8459
TIME...MOT...LOC 0008Z 197DEG 20KT 3420 8436

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:01 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	29 min
Apr 25, 8:26 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Pickens	28 min
Apr 25, 9:33 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Fulton	27 min
Apr 26, 2:41 PM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	30 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.