Alert archive / Georgia / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 166, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2011, 8:19 PM EDT for Barrow County, Gwinnett County, Georgia. It was in force for 41 min. 4 reports 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
- Apr 15, 2011, 8:19 PM EDT (00:19 UTC)
- Expired
- Apr 15, 2011, 9:00 PM EDT
- In force
- 41 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties Barrow County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 92 km from the middle of the area, began a volume at 00:22 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 |
|---|---|---|---|
| Apr 15, 8:46 PM EDT | HAIL 1 | Sugar Hill, GA | |
| Apr 15, 8:51 PM EDT | HAIL 0.5 | Buford, GA | |
| Apr 15, 9:05 PM EDT | HAIL 1.25 | Sugar Hill, GA | RICHMOND HILL SUBDIVISION. |
| Apr 15, 9:05 PM EDT | HAIL 2.75 | Lawrenceville, GA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 15, 5:46 PM EDT | Tornado Watch | SPC | 3 hr |
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.3 hours before the alert went out and 88 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
- 406 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1138 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 373 m²/s²
- 0-3 km storm-relative helicity
- 566 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 11.3
The text
As transmitted, in the capitals the NWS used until 2016.
982
WUUS52 KFFC 160019
SVRFFC
GAC013-135-160100-
/O.NEW.KFFC.SV.W.0166.110416T0019Z-110416T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
819 PM EDT FRI APR 15 2011
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN BARROW COUNTY IN NORTH CENTRAL GEORGIA
NORTHERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 900 PM EDT
* AT 817 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 BERKELEY
LAKE...MOVING EAST AT 50 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DULUTH...SUWANEE...LAWRENCEVILLE...SUGAR HILL...BUFORD...REST
HAVEN...DACULA...AUBURN AND CARL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SATURDAY MORNING
FOR NORTHERN GEORGIA.
&&
LAT...LON 3410 8387 3412 8382 3407 8377 3405 8371
3405 8364 3404 8364 3389 8423 3396 8428
3400 8425 3400 8421 3399 8420 3403 8417
3404 8410 3407 8412 3413 8409 3416 8403
TIME...MOT...LOC 0019Z 250DEG 43KT 3401 8417
$$1 follow-up statement
927
WWUS52 KFFC 160059
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
859 PM EDT FRI APR 15 2011
GAC013-160108-
/O.CAN.KFFC.SV.W.0166.000000T0000Z-110416T0100Z/
BARROW GA-
859 PM EDT FRI APR 15 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BARROW COUNTY IS
CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS EXITED BARROW
COUNTY...THUS...THE SEVERE THUNDERSTORM WARNING IS CANCELED FOR BARROW
COUNTY.
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SATURDAY MORNING
FOR NORTHERN GEORGIA.
LAT...LON 3410 8387 3412 8383 3407 8384 3406 8385
3404 8410 3407 8412 3413 8409 3416 8403
TIME...MOT...LOC 0058Z 240DEG 30KT 3417 8395
$$
GAC135-160100-
/O.CON.KFFC.SV.W.0166.000000T0000Z-110416T0100Z/
GWINNETT GA-
859 PM EDT FRI APR 15 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHEASTERN GWINNETT COUNTY...
AT 854 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
REST HAVEN...MOVING NORTHEAST AT 35 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SATURDAY MORNING
FOR NORTHERN GEORGIA.
&&
LAT...LON 3410 8387 3412 8383 3407 8384 3406 8385
3404 8410 3407 8412 3413 8409 3416 8403
TIME...MOT...LOC 0058Z 240DEG 30KT 3417 8395
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 8:02 PM EDT | Tornado Warning | FFC | Cobb, DeKalb, Fulton | 43 min |
| Apr 15, 8:12 PM EDT | Severe Thunderstorm Warning | FFC | Lamar, Meriwether, Pike, Talbot, Upson | 48 min |
| Apr 15, 8:28 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth, Hall | 47 min |
| Apr 15, 8:45 PM EDT | Severe Thunderstorm Warning | FFC | Cobb, Douglas, Paulding | 45 min |
| Apr 15, 8:56 PM EDT | Severe Thunderstorm Warning | FFC | Butts, Lamar, Monroe, Pike, Upson | 49 min |
| Apr 15, 9:18 PM EDT | Severe Thunderstorm Warning | FFC | Butts, Jasper, Jones, Monroe | 42 min |
| Apr 15, 9:19 PM EDT | Severe Thunderstorm Warning | FFC | DeKalb, Forsyth, Fulton, Gwinnett | 41 min |
| Apr 15, 10:44 PM EDT | River Flood Warning | FFC | Forsyth, Fulton | 40 hr |
| Apr 15, 11:44 PM EDT | River Flood Warning | FFC | Cobb | 6 hr |
| Apr 16, 12:17 AM EDT | River Flood Warning | FFC | Forsyth | 14 hr |
| Apr 16, 12:47 AM EDT | River Flood Warning | FFC | Dade | 34 hr |
| Apr 16, 1:25 AM EDT | Severe Thunderstorm Warning | FFC | Heard, Troup | 50 min |
| Apr 16, 1:40 AM EDT | Severe Thunderstorm Warning | FFC | Bartow, Carroll, Haralson, Paulding | 50 min |
| Apr 16, 1:54 AM EDT | Severe Thunderstorm Warning | FFC | Carroll, Coweta, Fulton, Meriwether | 51 min |
| Apr 16, 2:10 AM EDT | Tornado Warning | FFC | Carroll, Cobb, Douglas, Fulton, Paulding | 50 min |
| Apr 16, 2:38 AM EDT | Severe Thunderstorm Warning | FFC | Clayton, DeKalb, Fayette, Fulton, Henry, Newton and 1 more | 52 min |
| Apr 16, 2:46 AM EDT | Severe Thunderstorm Warning | FFC | Harris | 44 min |
| Apr 16, 3:15 AM EDT | Severe Thunderstorm Warning | FFC | Harris, Muscogee | 45 min |
| Apr 16, 3:26 AM EDT | Severe Thunderstorm Warning | FFC | Meriwether | 49 min |
| Apr 16, 3:35 AM EDT | Wind Advisory | FFC | Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more | 16 hr |
| Apr 16, 3:39 AM EDT | Tornado Warning | FFC | Harris, Talbot | 36 min |
| Apr 16, 3:51 AM EDT | Severe Thunderstorm Warning | FFC | Lamar, Meriwether, Pike, Spalding | 39 min |
| Apr 16, 4:04 AM EDT | Severe Thunderstorm Warning | FFC | Meriwether, Pike, Talbot, Upson | 26 min |
| Apr 16, 4:40 AM EDT | Severe Thunderstorm Warning | FFC | Chattahoochee, Macon, Marion, Muscogee, Talbot | 50 min |
| Apr 16, 4:45 AM EDT | Tornado Warning | FFC | Chattahoochee, Marion, Muscogee | 45 min |
| Apr 16, 5:12 AM EDT | Severe Thunderstorm Warning | FFC | Chattahoochee, Crawford, Marion, Talbot, Taylor, Upson | 48 min |
| Apr 16, 5:48 AM EDT | Tornado Warning | FFC | Bibb, Crawford, Monroe, Taylor | 42 min |
| Apr 16, 6:14 AM EDT | Tornado Warning | FFC | Baldwin, Jones, Putnam | 46 min |
| Apr 16, 6:26 AM EDT | River Flood Warning | FFC | Whitfield | 64 hr |
| Apr 16, 8:42 AM EDT | River Flood Warning | FFC | Cobb | 7 hr |
| Apr 16, 10:34 AM EDT | River Flood Warning | FFC | Gordon, Murray, Whitfield | 28 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.