Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 8, NWS Atlanta, GA

March 31, 2015Clayton County, Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 31, 2015, 6:30 PM EDT for Clayton County, Coweta County, Fayette County, Georgia. It was in force for 30 min. 2 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: Mar 31, 2015, 6:30 PM EDT (22:30 UTC)
Expired: Mar 31, 2015, 7:00 PM EDT
In force: 30 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Clayton County, GA, Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 11 km from the middle of the area, began a volume at 22:33 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
Mar 31, 6:37 PM EDT	HAIL 1	Stoney Brook Plantation, GA	PEA TO QUARTER SIZE HAIL IN NORTH PEACHTREE CITY BETWEEN 634 AND 637PM.
Mar 31, 6:37 PM EDT	HAIL 1	Tyrone, GA	QUARTER SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 31, 2:22 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.5 hours before the alert went out and 6 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1726 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 180 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.

946 
WUUS52 KFFC 312230
SVRFFC
GAC063-077-113-312300-
/O.NEW.KFFC.SV.W.0008.150331T2230Z-150331T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
630 PM EDT TUE MAR 31 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 700 PM EDT

* AT 630 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN 
  EXCESS OF 60 MPH. THIS STORM WAS LOCATED JUST WEST OF PEACHTREE 
  CITY...OR 10 MILES WEST OF FAYETTEVILLE...AND MOVING EAST AT 35 
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FAYETTEVILLE...PEACHTREE CITY...TYRONE...LOVEJOY...WOOLSEY...JW
  SMITH RESERVOIR...IRONDALE...INMAN AND BONANZA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

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 3347 8470 3348 8431 3343 8432 3343 8435
      3335 8435 3335 8438 3334 8438 3333 8439
      3343 8471
TIME...MOT...LOC 2230Z 276DEG 31KT 3343 8463 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 2:47 PM EDT	Special Weather Statement	FFC	Harris, Talbot	28 min
Mar 31, 2:50 PM EDT	Special Weather Statement	FFC	Schley	25 min
Mar 31, 3:39 PM EDT	Special Weather Statement	FFC	Troup	21 min
Mar 31, 3:42 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Dooly	48 min
Mar 31, 3:45 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Troup	45 min
Mar 31, 4:23 PM EDT	Special Weather Statement	FFC	Crisp	37 min
Mar 31, 4:30 PM EDT	Special Weather Statement	FFC	Talbot	30 min
Mar 31, 4:32 PM EDT	Special Weather Statement	FFC	Talbot	28 min
Mar 31, 4:52 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Talbot, Taylor, Upson	33 min
Mar 31, 5:14 PM EDT	Special Weather Statement	FFC	Carroll, Coweta	31 min
Mar 31, 5:15 PM EDT	Special Weather Statement	FFC	Carroll, Coweta	30 min
Mar 31, 5:33 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Heard	42 min
Mar 31, 5:43 PM EDT	Special Weather Statement	FFC	Butts, Jasper	32 min
Mar 31, 6:09 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Fayette, Spalding	51 min
Mar 31, 6:24 PM EDT	Special Weather Statement	FFC	Emanuel, Treutlen	36 min
Mar 31, 6:36 PM EDT	Special Weather Statement	FFC	Jones	24 min
Mar 31, 6:43 PM EDT	Severe Thunderstorm Warning	FFC	Heard, Troup	47 min
Mar 31, 6:48 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Lamar, Meriwether, Pike, Spalding	42 min
Mar 31, 6:57 PM EDT	Special Weather Statement	FFC	Upson	33 min
Mar 31, 7:20 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Pike, Upson	40 min
Mar 31, 7:35 PM EDT	Special Weather Statement	FFC	Crawford, Monroe	25 min
Mar 31, 7:51 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Monroe, Pike, Upson	39 min
Mar 31, 7:56 PM EDT	Special Weather Statement	FFC	Fannin, Union	34 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.