Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 307, NWS Atlanta, GA

July 30, 2015Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 30, 2015, 5:46 PM EDT for Coweta County, Fayette County, Georgia. It was in force for 44 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: Jul 30, 2015, 5:46 PM EDT (21:46 UTC)
Expired: Jul 30, 2015, 6:30 PM EDT
In force: 44 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 15 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 19 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: 805 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 71 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.

295 
WUUS52 KFFC 302146
SVRFFC
GAC077-113-302230-
/O.NEW.KFFC.SV.W.0307.150730T2146Z-150730T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
546 PM EDT THU JUL 30 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN COWETA COUNTY IN WEST CENTRAL GEORGIA...
  NORTHWESTERN FAYETTE COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 630 PM EDT

* AT 546 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER PALMETTO...
  OR 11 MILES WEST OF FAYETTEVILLE...MOVING SOUTH AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  NEWNAN...PEACHTREE CITY...TYRONE...PALMETTO...SENOIA...
  SHARPSBURG...TURIN...EAST NEWNAN...MADRAS...THOMAS CROSSROADS AND
  CANNONGATE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3351 8474 3351 8462 3350 8462 3350 8461
      3351 8461 3352 8460 3352 8459 3332 8456
      3337 8484
TIME...MOT...LOC 2146Z 013DEG 13KT 3350 8465 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:35 PM EDT	Special Weather Statement	FFC	White	40 min
Jul 29, 9:16 PM EDT	Special Weather Statement	FFC	White	44 min
Jul 30, 2:26 PM EDT	Special Weather Statement	FFC	Lamar	34 min
Jul 30, 2:30 PM EDT	Special Weather Statement	FFC	Butts	30 min
Jul 30, 3:20 PM EDT	Special Weather Statement	FFC	Bibb	25 min
Jul 30, 3:29 PM EDT	Special Weather Statement	FFC	Talbot	31 min
Jul 30, 3:43 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Taylor	28 min
Jul 30, 4:01 PM EDT	Special Weather Statement	FFC	Crawford	29 min
Jul 30, 4:06 PM EDT	Special Weather Statement	FFC	Muscogee	24 min
Jul 30, 4:48 PM EDT	Special Weather Statement	FFC	Crawford, Marion, Schley, Webster	27 min
Jul 30, 4:53 PM EDT	Special Weather Statement	FFC	Harris	37 min
Jul 30, 5:10 PM EDT	Special Weather Statement	FFC	Macon	35 min
Jul 30, 5:22 PM EDT	Special Weather Statement	FFC	Coweta	23 min
Jul 30, 5:31 PM EDT	Special Weather Statement	FFC	Sumter	29 min
Jul 30, 5:50 PM EDT	Special Weather Statement	FFC	Clayton	25 min
Jul 30, 5:55 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	35 min
Jul 30, 6:27 PM EDT	Severe Thunderstorm Warning	FFC	Fayette, Fulton	30 min
Jul 30, 7:59 PM EDT	Special Weather Statement	FFC	Baldwin	31 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning 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.