Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 340, NWS Atlanta, GA

September 23, 2017Bartow County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 23, 2017, 4:12 PM EDT for Bartow County, Georgia. It was in force for 23 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: Sep 23, 2017, 4:12 PM EDT (20:12 UTC)
Expired: Sep 23, 2017, 4:35 PM EDT
In force: 23 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Bartow County, GA

The radar

The Atlanta radar (KFFC), 103 km from the middle of the area, began a volume at 20:15 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, 8.2 hours before the alert went out and 104 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: 378 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1203 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

555 
WUUS52 KFFC 232012
SVRFFC
GAC015-232100-
/O.NEW.KFFC.SV.W.0340.170923T2012Z-170923T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
412 PM EDT SAT SEP 23 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Central Bartow County in northwestern Georgia...

* Until 500 PM EDT

* At 412 PM EDT, a severe thunderstorm was located over Cartersville,
  moving southwest at 5 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. 

* Locations impacted include...
  Cartersville, Euharlee, Emerson, White, Kingston, Taylorsville,
  Cassville, Stilesboro and Red Top Mountain State Park.

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 3434 8502 3431 8477 3415 8469 3408 8501
      3408 8502 3425 8502 3425 8501 3426 8502
TIME...MOT...LOC 2012Z 066DEG 6KT 3419 8481 

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

1 follow-up statement

203 
WWUS52 KFFC 232035
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
435 PM EDT SAT SEP 23 2017

GAC015-232045-
/O.CAN.KFFC.SV.W.0340.000000T0000Z-170923T2100Z/
Bartow GA-
435 PM EDT SAT SEP 23 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BARTOW COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3434 8502 3431 8477 3415 8469 3408 8501
      3408 8502 3425 8502 3425 8501 3426 8502
TIME...MOT...LOC 2034Z 066DEG 6KT 3417 8485 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 23, 3:31 PM EDT	Special Weather Statement	FFC	Pickens	44 min
Sep 23, 4:05 PM EDT	Special Weather Statement	FFC	Gordon	40 min
Sep 23, 4:18 PM EDT	Special Weather Statement	FFC	Pickens	42 min
Sep 23, 4:27 PM EDT	Special Weather Statement	FFC	Fannin	48 min
Sep 23, 4:35 PM EDT	Special Weather Statement	FFC	Walker	40 min
Sep 23, 4:37 PM EDT	Special Weather Statement	FFC	Gilmer	23 min
Sep 23, 4:47 PM EDT	Severe Thunderstorm Warning	FFC	Fannin	43 min
Sep 23, 5:16 PM EDT	Special Weather Statement	FFC	Chattooga	29 min
Sep 23, 5:30 PM EDT	Special Weather Statement	FFC	Polk	30 min
Sep 23, 5:54 PM EDT	Special Weather Statement	FFC	Chattooga	36 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 Every severe thunderstorm warning in 2017

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.