Alert archive / Georgia / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 480, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Aug 21, 2011, 7:47 PM EDT for DeKalb County, Fulton County, Georgia. It was in force for 26 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
- Aug 21, 2011, 7:47 PM EDT (23:47 UTC)
- Expired
- Aug 21, 2011, 8:13 PM EDT
- In force
- 26 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties DeKalb County, GA, Fulton County, GA
The radar
The Atlanta radar (KFFC), 56 km from the middle of the area, began a volume at 23:50 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, 11.8 hours before the alert went out and 54 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
- 428 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1235 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
917
WUUS52 KFFC 212347
SVRFFC
GAC089-121-220030-
/O.NEW.KFFC.SV.W.0480.110821T2347Z-110822T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
747 PM EDT SUN AUG 21 2011
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
DEKALB COUNTY IN NORTH CENTRAL GEORGIA
CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 830 PM EDT
* AT 742 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
BUCKHEAD...MOVING SOUTHEAST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MIDTOWN...ATLANTA...CHAMBLEE...DORAVILLE...GRANT PARK-ZOO
ATLANTA...DRUID HILLS...DECATUR...TUCKER...PINE LAKE...AVONDALE
ESTATES...STONE MOUNTAIN AND CLARKSTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT 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.
&&
LAT...LON 3383 8445 3385 8446 3388 8444 3391 8445
3396 8439 3392 8426 3387 8420 3386 8416
3379 8408 3364 8417 3365 8421 3380 8450
TIME...MOT...LOC 2347Z 296DEG 11KT 3386 8440
$$1 follow-up statement
124
WWUS52 KFFC 220013
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
813 PM EDT SUN AUG 21 2011
GAC089-121-220022-
/O.CAN.KFFC.SV.W.0480.000000T0000Z-110822T0030Z/
DEKALB GA-FULTON GA-
813 PM EDT SUN AUG 21 2011
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON AND DEKALB
COUNTIES IS CANCELLED...
THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY
HEAVY RAIN...AND OCCASIONAL LIGHTNING ARE STILL POSSIBLE WITH THIS
STORM.
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
LAT...LON 3383 8445 3385 8446 3388 8444 3391 8445
3396 8439 3392 8426 3387 8420 3386 8416
3379 8408 3364 8417 3365 8421 3380 8450
TIME...MOT...LOC 0012Z 296DEG 11KT 3383 8432
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 5:41 PM EDT | Special Weather Statement | FFC | Gordon, Murray, Pickens, Whitfield | 49 min |
| Aug 21, 6:10 PM EDT | Special Weather Statement | FFC | Douglas | 35 min |
| Aug 21, 6:22 PM EDT | Severe Thunderstorm Warning | FFC | Douglas, Fulton | 38 min |
| Aug 21, 6:40 PM EDT | Special Weather Statement | FFC | Cherokee, Pickens | 50 min |
| Aug 21, 6:52 PM EDT | Special Weather Statement | FFC | Coweta | 23 min |
| Aug 21, 7:05 PM EDT | Special Weather Statement | FFC | Douglas | 25 min |
| Aug 21, 7:22 PM EDT | Special Weather Statement | FFC | DeKalb, Fulton | 38 min |
| Aug 21, 7:30 PM EDT | Special Weather Statement | FFC | Cherokee | 30 min |
| Aug 21, 7:36 PM EDT | Special Weather Statement | FFC | Douglas | 39 min |
| Aug 21, 7:43 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth, Fulton, Gwinnett | 33 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2011Every severe thunderstorm warning in 2011
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.