Alert archive / Georgia / Special Weather Statements in 2011

Special Weather Statement, NWS Atlanta, GA

September 22, 2011Whitfield County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 22, 2011, 3:21 PM EDT for Whitfield County, Georgia. It was in force for 39 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: Sep 22, 2011, 3:21 PM EDT (19:21 UTC)
Expired: Sep 22, 2011, 4:00 PM EDT
In force: 39 min
Issued by: NWS Atlanta, GA

County Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 103 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 176 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: 1248 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 682 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

257 
WWUS82 KFFC 221921
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
321 PM EDT THU SEP 22 2011

GAZ004-222000-
321 PM EDT THU SEP 22 2011

...SIGNIFICANT WEATHER ADVISORY FOR PEA SIZED HAIL AND 35 MPH WINDS
IN WHITFIELD COUNTY UNTIL 400 PM EDT...

AT 320 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER TUNNEL HILL...MOVING NORTHEAST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE PEA SIZED HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING AND WIND GUSTS TO 35 MPH AS IT MOVES ACROSS
WHITFIELD COUNTY THROUGH 400 PM EDT. SOME LOCATIONS IN THE PATH OF
THIS STORM INCLUDE TUNNEL HILL...VARNELL...BEAVERDALE AND COHUTTA.
HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER ON ROADWAYS.

SIGNIFICANT WEATHER ADVISORIES ARE ISSUED FOR WINDS UP TO 50 MPH...
HAIL LESS THAN THE SIZE OF QUARTERS...OR SIGNIFICANT CLOUD-TO-GROUND
LIGHTNING.

&&

LAT...LON 3497 8481 3493 8484 3487 8482 3481 8504
      3483 8506 3485 8506 3487 8505 3488 8501
      3491 8502 3491 8501 3499 8497 3499 8484
TIME...MOT...LOC 1921Z 228DEG 9KT 3485 8500

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 2:28 AM EDT	Special Weather Statement	FFC	Banks	62 min
Sep 22, 2:58 AM EDT	Special Weather Statement	FFC	Coweta	47 min
Sep 22, 6:42 AM EDT	Special Weather Statement	FFC	Cherokee	63 min
Sep 22, 7:15 AM EDT	Special Weather Statement	FFC	Gilmer	45 min
Sep 22, 1:33 PM EDT	Special Weather Statement	FFC	Laurens	42 min
Sep 22, 2:01 PM EDT	Special Weather Statement	FFC	Haralson	44 min
Sep 22, 2:10 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	35 min
Sep 22, 2:32 PM EDT	Special Weather Statement	FFC	Montgomery, Treutlen	43 min
Sep 22, 2:49 PM EDT	Special Weather Statement	FFC	Cherokee	26 min
Sep 22, 2:54 PM EDT	Special Weather Statement	FFC	Floyd	36 min
Sep 22, 3:01 PM EDT	Special Weather Statement	FFC	Fayette	29 min
Sep 22, 3:09 PM EDT	Special Weather Statement	FFC	Dawson	36 min
Sep 22, 3:11 PM EDT	Special Weather Statement	FFC	Toombs	49 min
Sep 22, 3:39 PM EDT	Special Weather Statement	FFC	Coweta, Fayette	66 min
Sep 22, 4:30 PM EDT	Flash Flood Warning	FFC	Coweta, Fayette	3 hr
Sep 22, 5:23 PM EDT	Special Weather Statement	FFC	Cherokee, Pickens	37 min
Sep 22, 5:38 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin	37 min
Sep 22, 6:07 PM EDT	Special Weather Statement	FFC	Troup	38 min
Sep 22, 6:18 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	42 min
Sep 22, 6:39 PM EDT	Flash Flood Warning	FFC	Cherokee, Dawson, Forsyth	4 hr
Sep 22, 6:46 PM EDT	Special Weather Statement	FFC	Troup	44 min
Sep 22, 7:06 PM EDT	Special Weather Statement	FFC	Henry	24 min
Sep 22, 7:17 PM EDT	Special Weather Statement	FFC	Lumpkin	43 min
Sep 22, 7:35 PM EDT	Special Weather Statement	FFC	Hall	25 min
Sep 22, 7:42 PM EDT	Special Weather Statement	FFC	Troup	63 min

Nearby

Special Weather Statements in Georgia, 2011 Every special weather statement 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.