Alert archive / Georgia / Special Weather Statements in 2014

Special Weather Statement, NWS Atlanta, GA

August 31, 2014Johnson County, Georgia

NWS Atlanta, GA issued this special weather statement at Aug 31, 2014, 3:30 PM EDT for Johnson County, Georgia. It was in force for 30 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: Aug 31, 2014, 3:30 PM EDT (19:30 UTC)
Expired: Aug 31, 2014, 4:00 PM EDT
In force: 30 min
Issued by: NWS Atlanta, GA

County Johnson County, GA

The radar

The Robins AFB radar (KJGX), 59 km from the middle of the area, began a volume at 19:32 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, 7.5 hours before the alert went out and 181 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: 547 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Aug 31, 2:10 PM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, Aug 31, 2:10 PM EDT, 1 hour 20 minutes before

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Hazardous weather outlook, Aug 31, 5:23 AM EDT, 10 hours 7 minutes before

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In the hours before

Special weather statement, Aug 31, 3:30 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
330 PM EDT SUN AUG 31 2014

GAZ085-312000-
330 PM EDT SUN AUG 31 2014

...SIGNIFICANT WEATHER ADVISORY FOR EXCESSIVE LIGHTNING IN JOHNSON
COUNTY UNTIL 400 PM EDT...

AT 323 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER SPANN...MOVING EAST AT 5 MPH.

LIGHTNING DETECTION SYSTEMS INDICATE NUMEROUS CLOUD-TO-GROUND
LIGHTNING STRIKES ACROSS JOHNSON COUNTY...INCLUDING AREAS AROUND
SPANN...NEW HOME...MEEKS...DONOVAN AND WRIGHTSVILLE. RESIDENTS IN
THIS AREA SHOULD STAY INDOORS. ELECTRICAL APPLIANCES AND TELEPHONES
SHOULD NOT BE USED UNLESS IN AN EMERGENCY.

&&

LAT...LON 3260 8267 3262 8268 3266 8279 3269 8280
      3272 8287 3277 8289 3280 8278 3277 8276
      3279 8270 3278 8266 3281 8258 3261 8253
TIME...MOT...LOC 1930Z 259DEG 4KT 3269 8276

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 8:22 PM EDT	Special Weather Statement	FFC	Chattooga, Dade, Walker	23 min
Aug 30, 8:44 PM EDT	Special Weather Statement	FFC	Dade, Walker	31 min
Aug 30, 9:39 PM EDT	Special Weather Statement	FFC	Cobb, Douglas, Paulding	36 min
Aug 30, 10:16 PM EDT	Special Weather Statement	FFC	Cherokee	44 min
Aug 31, 3:27 AM EDT	Special Weather Statement	FFC	Oglethorpe	33 min
Aug 31, 7:12 AM EDT	Special Weather Statement	FFC	Crisp	48 min
Aug 31, 3:42 PM EDT	Special Weather Statement	FFC	Washington	33 min
Aug 31, 3:56 PM EDT	Special Weather Statement	FFC	Jefferson	34 min
Aug 31, 4:21 PM EDT	Special Weather Statement	FFC	Jefferson	24 min
Aug 31, 4:36 PM EDT	Special Weather Statement	FFC	Treutlen	24 min
Aug 31, 5:09 PM EDT	Special Weather Statement	FFC	Laurens	36 min
Aug 31, 5:32 PM EDT	Severe Thunderstorm Warning	FFC	Laurens, Treutlen	21 min
Aug 31, 5:52 PM EDT	Special Weather Statement	FFC	Wheeler	23 min
Aug 31, 6:08 PM EDT	Special Weather Statement	FFC	Dade	37 min
Aug 31, 6:44 PM EDT	Special Weather Statement	FFC	Dodge	31 min
Aug 31, 7:05 PM EDT	Special Weather Statement	FFC	Toombs	25 min

Nearby

Special Weather Statements in Georgia, 2014 Every special weather statement in 2014

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.