Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 328, NWS Atlanta, GA

September 5, 20175 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 5, 2017, 6:40 PM EDT for 5 counties in Georgia. It was in force for 35 min. 1 report 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: Sep 5, 2017, 6:40 PM EDT (22:40 UTC)
Expired: Sep 5, 2017, 7:15 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dawson County, GA, Forsyth County, GA, Hall County, GA, Lumpkin County, GA, White County, GA

The radar

The Atlanta radar (KFFC), 126 km from the middle of the area, began a volume at 22:42 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
Sep 5, 6:45 PM EDT	TSTM WND DMG	Lumpkin, GA	AT US 19 AND HWY 53... REPORTS OF WIND DAMAGE INCLUDED SIGNS BEING BLOWN OFF OF THE OVERPASS AND STRIKING A VEHICLE AS WELL AS MULTIPLE REPORTS OF TREES AND POWER LINES DOWN.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.7 hours before the alert went out and 123 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: 483 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 936 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

141 
WUUS52 KFFC 052240
SVRFFC
GAC085-117-139-187-311-052315-
/O.NEW.KFFC.SV.W.0328.170905T2240Z-170905T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
640 PM EDT TUE SEP 5 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Forsyth County in north central Georgia...
  Southeastern Lumpkin County in north central Georgia...
  Southwestern White County in northeastern Georgia...
  Southeastern Dawson County in north central Georgia...
  Northern Hall County in north central Georgia...

* Until 715 PM EDT

* At 640 PM EDT, a severe thunderstorm was located over Dougherty, or
  near Dawsonville, moving northeast at 20 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...
  Gainesville, Lula, Clermont, Dougherty, Silver City, Murrayville,
  Garland and War Hill 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 3428 8408 3437 8415 3457 8381 3438 8366
TIME...MOT...LOC 2240Z 244DEG 16KT 3435 8406 

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
Sep 4, 8:26 PM EDT	Special Weather Statement	FFC	Toombs	34 min
Sep 4, 10:40 PM EDT	Special Weather Statement	FFC	Treutlen	35 min
Sep 5, 3:15 PM EDT	Special Weather Statement	FFC	Chattooga	30 min
Sep 5, 3:21 PM EDT	Special Weather Statement	FFC	Gilmer, Murray	24 min
Sep 5, 3:49 PM EDT	Special Weather Statement	FFC	Chattooga, Floyd	26 min
Sep 5, 4:04 PM EDT	Special Weather Statement	FFC	Murray	26 min
Sep 5, 4:23 PM EDT	Special Weather Statement	FFC	Catoosa	37 min
Sep 5, 4:38 PM EDT	Special Weather Statement	FFC	Dade	37 min
Sep 5, 4:50 PM EDT	Special Weather Statement	FFC	Fannin	25 min
Sep 5, 5:01 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer	29 min
Sep 5, 5:07 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	23 min
Sep 5, 5:08 PM EDT	Special Weather Statement	FFC	Murray	37 min
Sep 5, 5:18 PM EDT	Special Weather Statement	FFC	Catoosa	27 min
Sep 5, 5:32 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker, Whitfield	13 min
Sep 5, 5:34 PM EDT	Special Weather Statement	FFC	Cherokee	26 min
Sep 5, 5:47 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Pickens	28 min
Sep 5, 5:51 PM EDT	Special Weather Statement	FFC	Polk	24 min
Sep 5, 5:57 PM EDT	Special Weather Statement	FFC	Gordon	33 min
Sep 5, 6:08 PM EDT	Special Weather Statement	FFC	Douglas	37 min
Sep 5, 6:17 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin, White	43 min
Sep 5, 6:20 PM EDT	Special Weather Statement	FFC	Cherokee	40 min
Sep 5, 6:51 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Douglas, Fayette, Fulton	24 min
Sep 5, 6:57 PM EDT	Special Weather Statement	FFC	Haralson, Paulding	33 min
Sep 5, 7:02 PM EDT	Special Weather Statement	FFC	Cobb, Forsyth	28 min
Sep 5, 7:12 PM EDT	Special Weather Statement	FFC	Banks, Hall	33 min
Sep 5, 7:17 PM EDT	Special Weather Statement	FFC	Clayton	28 min
Sep 5, 7:20 PM EDT	Special Weather Statement	FFC	Coweta	25 min
Sep 5, 7:33 PM EDT	Special Weather Statement	FFC	Cobb, Forsyth, Gwinnett	27 min
Sep 5, 7:38 PM EDT	Special Weather Statement	FFC	Fulton	37 min
Sep 5, 7:47 PM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette	43 min
Sep 5, 7:48 PM EDT	Special Weather Statement	FFC	Banks, Hall, Jackson	27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.