Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 39, NWS Atlanta, GA

April 20, 2015Cherokee County, Pickens County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 20, 2015, 6:26 AM EDT for Cherokee County, Pickens County, Georgia. It was in force for 20 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: Apr 20, 2015, 6:26 AM EDT (10:26 UTC)
Expired: Apr 20, 2015, 6:46 AM EDT
In force: 20 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cherokee County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 112 km from the middle of the area, began a volume at 10:29 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 00:00Z, 10.4 hours before the alert went out and 110 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: 54 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

255 
WUUS52 KFFC 201026
SVRFFC
GAC057-227-201100-
/O.NEW.KFFC.SV.W.0039.150420T1026Z-150420T1100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
626 AM EDT MON APR 20 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN PICKENS COUNTY IN NORTH CENTRAL GEORGIA...
  CENTRAL CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 700 AM EDT

* AT 626 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER CANTON...
  MOVING NORTHEAST AT 50 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
  CANTON...HOLLY SPRINGS...BALL GROUND...NELSON...WALESKA...FREE
  HOME...BUFFINGTON...MARBLEHILL...LATHEMTOWN...TATE AND REAVIS
  MOUNTAIN.

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 3447 8426 3425 8426 3415 8450 3431 8460
      3447 8431
TIME...MOT...LOC 1026Z 240DEG 49KT 3428 8447 

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

1 follow-up statement

000 
WWUS52 KFFC 201046
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
646 AM EDT MON APR 20 2015

GAC057-227-201055-
/O.CAN.KFFC.SV.W.0039.000000T0000Z-150420T1100Z/
PICKENS GA-CHEROKEE GA-
646 AM EDT MON APR 20 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PICKENS AND
CENTRAL CHEROKEE COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3447 8426 3425 8426 3415 8450 3431 8460
      3447 8431
TIME...MOT...LOC 1044Z 240DEG 49KT 3441 8419 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:41 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Pickens	34 min
Apr 19, 9:30 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin, White	30 min
Apr 20, 3:57 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Floyd, Walker	48 min
Apr 20, 4:44 AM EDT	Special Weather Statement	FFC	Catoosa, Chattooga, Floyd, Walker, Whitfield	31 min
Apr 20, 5:10 AM EDT	Special Weather Statement	FFC	Bartow, Gordon, Murray	35 min
Apr 20, 5:30 AM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Gordon, Murray	30 min
Apr 20, 5:42 AM EDT	Special Weather Statement	FFC	Bartow, Haralson, Paulding	33 min
Apr 20, 6:03 AM EDT	Special Weather Statement	FFC	Pickens	27 min
Apr 20, 6:07 AM EDT	Special Weather Statement	FFC	Fannin, Towns, Union	23 min
Apr 20, 6:23 AM EDT	Special Weather Statement	FFC	Cherokee	37 min
Apr 20, 6:30 AM EDT	Special Weather Statement	FFC	Lumpkin, Towns	30 min
Apr 20, 6:40 AM EDT	Special Weather Statement	FFC	Dawson	35 min
Apr 20, 6:57 AM EDT	Severe Thunderstorm Warning	FFC	White	19 min
Apr 20, 7:00 AM EDT	Special Weather Statement	FFC	Banks, Hall	30 min
Apr 20, 9:55 AM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	4 days
Apr 20, 12:38 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Forsyth, Hall, Lumpkin, White	37 min
Apr 20, 12:58 PM EDT	Special Weather Statement	FFC	Stewart, Webster	32 min
Apr 20, 1:00 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Hall, Lumpkin, White	45 min
Apr 20, 1:08 PM EDT	Special Weather Statement	FFC	Cobb, Paulding	37 min
Apr 20, 1:16 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding	44 min
Apr 20, 1:27 PM EDT	Special Weather Statement	FFC	Cherokee, Forsyth	33 min
Apr 20, 1:32 PM EDT	Special Weather Statement	FFC	Houston, Macon, Peach	28 min
Apr 20, 1:33 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, Forsyth	42 min
Apr 20, 1:40 PM EDT	Special Weather Statement	FFC	Towns	35 min
Apr 20, 1:58 PM EDT	Special Weather Statement	FFC	Crawford	32 min
Apr 20, 1:58 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Cobb, Fulton	47 min
Apr 20, 2:01 PM EDT	Special Weather Statement	FFC	Paulding	29 min
Apr 20, 2:07 PM EDT	Tornado Warning	FFC	Cobb, DeKalb, Forsyth, Fulton, Gwinnett	38 min
Apr 20, 2:14 PM EDT	Special Weather Statement	FFC	Hall	31 min
Apr 20, 2:30 PM EDT	Special Weather Statement	FFC	Paulding	15 min
Apr 20, 2:35 PM EDT	Special Weather Statement	FFC	Banks	25 min
Apr 20, 2:44 PM EDT	Tornado Warning	FFC	Barrow, Forsyth, Fulton, Gwinnett, Hall, Jackson	46 min
Apr 20, 2:45 PM EDT	Severe Thunderstorm Warning	FFC	Banks	45 min
Apr 20, 3:09 PM EDT	Special Weather Statement	FFC	Cobb	36 min
Apr 20, 3:18 PM EDT	Tornado Warning	FFC	Banks, Jackson, Madison	42 min
Apr 20, 3:23 PM EDT	Special Weather Statement	FFC	Jasper, Putnam	22 min
Apr 20, 3:28 PM EDT	Special Weather Statement	FFC	Gwinnett	47 min
Apr 20, 4:00 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Madison	15 min
Apr 20, 4:05 PM EDT	Special Weather Statement	FFC	Barrow, Jackson	40 min
Apr 20, 4:13 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Clarke, Jackson, Madison	47 min
Apr 20, 4:25 PM EDT	Special Weather Statement	FFC	Oglethorpe	20 min
Apr 20, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Madison	35 min
Apr 20, 5:42 PM EDT	Special Weather Statement	FFC	Clarke	33 min
Apr 20, 5:46 PM EDT	Severe Thunderstorm Warning	FFC	Madison	14 min
Apr 20, 5:58 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Madison, Oconee, Oglethorpe	47 min
Apr 20, 6:45 PM EDT	Special Weather Statement	FFC	Clarke, Oglethorpe	30 min
Apr 20, 7:10 PM EDT	Severe Thunderstorm Warning	FFC	Oglethorpe, Wilkes	50 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.