Alert archive / Georgia / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 177, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at May 12, 2017, 6:43 PM EDT for Barrow County, Gwinnett County, Georgia. It was in force for 47 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
- May 12, 2017, 6:43 PM EDT (22:43 UTC)
- Expired
- May 12, 2017, 7:30 PM EDT
- In force
- 47 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Barrow County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 91 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 87 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1299 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
396
WUUS52 KFFC 122243
SVRFFC
GAC013-135-122330-
/O.NEW.KFFC.SV.W.0177.170512T2243Z-170512T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
643 PM EDT FRI MAY 12 2017
The National Weather Service in Peachtree City has issued a
* Severe Thunderstorm Warning for...
Southwestern Barrow County in north central Georgia...
East central Gwinnett County in north central Georgia...
* Until 730 PM EDT
* At 643 PM EDT, a severe thunderstorm was located over Grayson, or
over Lawrenceville, moving northeast at 15 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...
Lawrenceville, Snellville, Auburn, Dacula, Grayson, Carl and
Harbin.
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 3402 8381 3394 8379 3389 8385 3385 8398
3393 8405 3404 8389
TIME...MOT...LOC 2243Z 231DEG 12KT 3392 8398
HAIL...1.00IN
WIND...60MPH
$$2 follow-up statements
126
WWUS52 KFFC 122253
SVSFFC
Severe Weather Statement
National Weather Service Peachtree City GA
653 PM EDT FRI MAY 12 2017
GAC013-135-122330-
/O.CON.KFFC.SV.W.0177.000000T0000Z-170512T2330Z/
Barrow GA-Gwinnett GA-
653 PM EDT FRI MAY 12 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN BARROW AND EAST CENTRAL GWINNETT COUNTIES...
At 653 PM EDT, a severe thunderstorm was located over Lawrenceville,
moving northeast at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Lawrenceville, Auburn, Dacula, Grayson, Carl and Harbin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If you see wind damage...hail or flooding...wait until the storm has
passed...and then call the National Weather Service toll free
at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at NWSATLANTA.
&&
LAT...LON 3402 8381 3394 8379 3389 8385 3386 8394
3395 8402 3404 8389
TIME...MOT...LOC 2253Z 231DEG 12KT 3394 8395
HAIL...0.75IN
WIND...60MPH
$$027
WWUS52 KFFC 122321
SVSFFC
Severe Weather Statement
National Weather Service Peachtree City GA
721 PM EDT FRI MAY 12 2017
GAC013-135-122331-
/O.EXP.KFFC.SV.W.0177.000000T0000Z-170512T2330Z/
Barrow GA-Gwinnett GA-
721 PM EDT FRI MAY 12 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BARROW AND EAST
CENTRAL GWINNETT COUNTIES WILL EXPIRE AT 730 PM EDT...
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 will be allowed to expire.
LAT...LON 3402 8381 3394 8379 3389 8385 3386 8394
3395 8402 3404 8389
TIME...MOT...LOC 2321Z 231DEG 12KT 3399 8387
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 2:17 PM EDT | Special Weather Statement | FFC | Catoosa, Walker | 28 min |
| May 12, 3:46 PM EDT | Special Weather Statement | FFC | Polk | 29 min |
| May 12, 4:13 PM EDT | Special Weather Statement | FFC | Haralson | 47 min |
| May 12, 4:21 PM EDT | Special Weather Statement | FFC | Bartow | 24 min |
| May 12, 4:46 PM EDT | Special Weather Statement | FFC | Cherokee | 44 min |
| May 12, 5:22 PM EDT | Special Weather Statement | FFC | Cobb, Paulding | 23 min |
| May 12, 5:45 PM EDT | Special Weather Statement | FFC | Forsyth | 30 min |
| May 12, 6:11 PM EDT | Special Weather Statement | FFC | Gwinnett | 34 min |
| May 12, 6:15 PM EDT | Severe Thunderstorm Warning | FFC | DeKalb, Gwinnett | 30 min |
| May 12, 6:25 PM EDT | Special Weather Statement | FFC | Hall | 50 min |
| May 12, 7:01 PM EDT | Special Weather Statement | FFC | Banks | 29 min |
| May 12, 7:47 PM EDT | Special Weather Statement | FFC | Chattooga | 43 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2017Every 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.