Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 334, NWS Atlanta, GA

November 6, 20184 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Nov 6, 2018, 7:04 AM EST for 4 counties in Georgia. It was in force for 15 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: Nov 6, 2018, 7:04 AM EST (12:04 UTC)
Expired: Nov 6, 2018, 7:19 AM EST
In force: 15 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Cherokee County, GA, Dawson County, GA, Forsyth County, GA, Hall County, GA

The radar

The Atlanta radar (KFFC), 111 km from the middle of the area, began a volume at 12:05 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 watch it was issued in

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

Issued	Product	Office	Lasted
Nov 6, 3:15 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.1 hours before the alert went out and 109 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: 701 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 487 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 330 m²/s²
0-3 km storm-relative helicity: 398 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

As transmitted.

571 
WUUS52 KFFC 061204
SVRFFC
GAC057-085-117-139-061230-
/O.NEW.KFFC.SV.W.0334.181106T1204Z-181106T1230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
704 AM EST TUE NOV 6 2018

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  East central Cherokee County in north central Georgia...
  Northern Forsyth County in north central Georgia...
  Southeastern Dawson County in north central Georgia...
  West central Hall County in north central Georgia...

* Until 730 AM EST.

* At 704 AM EST, a severe thunderstorm was located near Hightower, or
  9 miles northwest of Cumming, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Gainesville, Cumming, Free Home, Dougherty, Coal Mountain,
  Hightower, Matt, Aqualand Park, Silver City, Chestatee, Oscarville,
  Lathemtown, Ducktown 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 3424 8433 3436 8432 3441 8394 3431 8386
      3420 8393
TIME...MOT...LOC 1204Z 266DEG 36KT 3430 8427 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

1 follow-up statement

227 
WWUS52 KFFC 061219
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
719 AM EST TUE NOV 6 2018

GAC057-085-117-139-061229-
/O.CAN.KFFC.SV.W.0334.000000T0000Z-181106T1230Z/
Cherokee GA-Forsyth GA-Dawson GA-Hall GA-
719 AM EST TUE NOV 6 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHEROKEE...
NORTHERN FORSYTH...SOUTHEASTERN DAWSON AND WEST CENTRAL HALL COUNTIES
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 3424 8433 3436 8432 3441 8394 3431 8386
      3420 8393
TIME...MOT...LOC 1217Z 266DEG 36KT 3431 8409 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 6, 3:55 AM EST	Special Weather Statement	FFC	Catoosa, Dade, Fannin, Gilmer, Gordon, Murray and 2 more	110 min
Nov 6, 3:58 AM EST	Severe Thunderstorm Warning	FFC	Catoosa, Chattooga, Dade, Walker, Whitfield	62 min
Nov 6, 4:52 AM EST	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray, Walker, Whitfield	38 min
Nov 6, 5:21 AM EST	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Gordon, Murray, Pickens	38 min
Nov 6, 5:58 AM EST	Special Weather Statement	FFC	Fannin, Gilmer, Towns, Union	47 min
Nov 6, 6:27 AM EST	Special Weather Statement	FFC	Towns, White	33 min
Nov 6, 6:53 AM EST	Special Weather Statement	FFC	Dawson	37 min
Nov 6, 7:15 AM EST	Special Weather Statement	FFC	White	15 min
Nov 6, 7:39 AM EST	Special Weather Statement	FFC	Forsyth	36 min
Nov 6, 8:00 AM EST	Special Weather Statement	FFC	Gwinnett	30 min
Nov 6, 8:30 AM EST	Special Weather Statement	FFC	Barrow, Jackson	30 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 Every severe thunderstorm warning in 2018

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.