Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 324, NWS Atlanta, GA

September 5, 2017Fannin County, Gilmer County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 5, 2017, 5:01 PM EDT for Fannin County, Gilmer County, Georgia. It was in force for 29 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 5, 2017, 5:01 PM EDT (21:01 UTC)
Expired: Sep 5, 2017, 5:30 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Fannin County, GA, Gilmer County, GA

The radar

The Atlanta radar (KFFC), 161 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 159 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.

896 
WUUS52 KFFC 052101
SVRFFC
GAC111-123-052130-
/O.NEW.KFFC.SV.W.0324.170905T2101Z-170905T2130Z/

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

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Gilmer County in north central Georgia...
  Southeastern Fannin County in north central Georgia...

* Until 530 PM EDT

* At 501 PM EDT, a severe thunderstorm was located over Pisgah, or 9
  miles south of Blue Ridge, moving east at 25 mph.

  HAZARD...60 mph wind gusts and nickel size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Dial, Margret, Pisgah, Cherry Log, Stover Creek Shelter, Hurst and
  Roy.

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 3485 8414 3484 8415 3481 8414 3480 8413
      3480 8409 3473 8409 3473 8411 3465 8416
      3464 8440 3478 8447 3487 8411
TIME...MOT...LOC 2101Z 263DEG 20KT 3473 8431 

HAIL...0.88IN
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, 5:07 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, 6:40 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Hall, Lumpkin, White	35 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.