Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Atlanta, GA

June 20, 2015Clayton County, DeKalb County, Georgia

NWS Atlanta, GA issued this special weather statement at Jun 20, 2015, 1:49 PM EDT for Clayton County, DeKalb County, Georgia. It was in force for 26 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: Jun 20, 2015, 1:49 PM EDT (17:49 UTC)
Expired: Jun 20, 2015, 2:15 PM EDT
In force: 26 min
Issued by: NWS Atlanta, GA

Counties Clayton County, GA, DeKalb County, GA

The radar

The Atlanta radar (KFFC), 45 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 42 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: 987 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

111 
WWUS82 KFFC 201749
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
149 PM EDT SAT JUN 20 2015
 
GAZ033-044-045-055-057-201815-
DE KALB GA-HENRY GA-CLAYTON GA-SOUTH FULTON GA-NORTH FULTON GA-
149 PM EDT SAT JUN 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR 35 MPH WINDS IN DE KALB...
HENRY...CLAYTON...SOUTH FULTON AND NORTH FULTON COUNTIES UNTIL 215 PM
EDT...

AT 148 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR CANDLER-MCAFEE...OR NEAR DECATUR...MOVING
EAST AT 40 MPH.

WIND GUSTS OF 35 MPH ARE LIKELY WITH THIS STORM AS THIS STORM MOVES
ACROSS DE KALB...HENRY...CLAYTON...SOUTH FULTON AND NORTH FULTON
COUNTIES THROUGH 215 PM EDT.

SOME LOCATIONS IN THE PATH OF THE STORM INCLUDE
ATLANTA...DECATUR...JONESBORO...EAST POINT...STOCKBRIDGE...FOREST
PARK...RIVERDALE...CLARKSTON...MORROW...HAPEVILLE...STONE MOUNTAIN...
AVONDALE ESTATES...LAKE CITY...PINE LAKE...DRUID HILLS...NORTH
DECATUR...CANDLER-MCAFEE...BELVEDERE PARK...GRANT PARK-ZOO ATLANTA
AND TUCKER.

LAT...LON 3375 8441 3387 8419 3387 8418 3345 8419
      3355 8445
TIME...MOT...LOC 1748Z 262DEG 35KT 3368 8431 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 5:33 AM EDT	Special Weather Statement	FFC	Dade	27 min
Jun 20, 1:57 PM EDT	Special Weather Statement	FFC	Fayette	33 min
Jun 20, 2:19 PM EDT	Special Weather Statement	FFC	Newton, Rockdale	26 min
Jun 20, 2:31 PM EDT	Special Weather Statement	FFC	Cobb, Paulding	29 min
Jun 20, 2:42 PM EDT	Special Weather Statement	FFC	Fayette, Henry, Spalding	33 min
Jun 20, 2:48 PM EDT	Special Weather Statement	FFC	Twiggs	27 min
Jun 20, 2:54 PM EDT	Severe Thunderstorm Warning	FFC	Cobb	38 min
Jun 20, 3:01 PM EDT	Special Weather Statement	FFC	Clarke, Oconee, Walton	29 min
Jun 20, 3:11 PM EDT	Special Weather Statement	FFC	Gwinnett	34 min
Jun 20, 3:13 PM EDT	Special Weather Statement	FFC	Newton	32 min
Jun 20, 3:37 PM EDT	Special Weather Statement	FFC	Clarke, Oglethorpe, Wilkes	23 min
Jun 20, 3:46 PM EDT	Special Weather Statement	FFC	Gwinnett	29 min
Jun 20, 3:59 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett, Rockdale, Walton	29 min
Jun 20, 4:01 PM EDT	Special Weather Statement	FFC	Oglethorpe, Wilkes	29 min
Jun 20, 4:24 PM EDT	Special Weather Statement	FFC	Clayton	36 min
Jun 20, 4:57 PM EDT	Special Weather Statement	FFC	Clayton, Fayette	33 min
Jun 20, 4:58 PM EDT	Special Weather Statement	FFC	Rockdale	32 min
Jun 20, 5:42 PM EDT	Special Weather Statement	FFC	Coweta, Fayette	33 min
Jun 20, 6:28 PM EDT	Special Weather Statement	FFC	Meriwether, Troup	32 min

Nearby

Special Weather Statements in Georgia, 2015 Every special weather statement in 2015

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.