Alert archive / Georgia / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 122, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at May 20, 2012, 7:00 PM EDT for Clayton County, DeKalb County, Fulton County, Georgia. It was in force for 31 min. 3 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
- May 20, 2012, 7:00 PM EDT (23:00 UTC)
- Expired
- May 20, 2012, 7:31 PM EDT
- In force
- 31 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties Clayton County, GA, DeKalb County, GA, Fulton County, GA
The radar
The Atlanta radar (KFFC), 45 km from the middle of the area, began a volume at 23:00 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 |
|---|---|---|---|
| May 20, 7:20 PM EDT | HAIL 1 | 4 S Atlanta, GA | MARBLE TO QUARTER SIZE HAIL WAS REPORTED BY THE MEDIA ON LANGFORD PARKWAY SOUTH OF DOWNTOWN ATLANTA |
| May 20, 7:25 PM EDT | HAIL 0.88 | 1 E Lakewood Park, GA | PUBLIC REPORTED DIME TO NICKEL SIZED HAIL IN LAKEWOOD HEIGHTS AROUND 1925 EDT. |
| May 20, 7:40 PM EDT | TSTM WND DMG | 3 Ene Decatur, GA | DEKALB COUNTY 911 RELAYED A REPORT OF A TREE DOWNED ON MONTREAL ROAD. RADAR ESTIMATED TIME BETWEEN 1940 EDT AND 1945 EDT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.0 hours before the alert went out and 41 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
- 1433 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
864
WUUS52 KFFC 202300
SVRFFC
GAC063-089-121-202345-
/O.NEW.KFFC.SV.W.0122.120520T2300Z-120520T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
700 PM EDT SUN MAY 20 2012
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CLAYTON COUNTY IN NORTH CENTRAL GEORGIA
WESTERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 745 PM EDT
* AT 655 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
DECATUR...MOVING SOUTHWEST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MIDTOWN...ATLANTA...GRANT PARK-ZOO ATLANTA...EAST POINT...
HAPEVILLE...FOREST PARK...COLLEGE PARK...HARTSFIELD-JACKSON AIRPORT
AND LAKE CITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.
&&
LAT...LON 3389 8431 3384 8420 3365 8424 3364 8428
3363 8426 3359 8425 3358 8425 3358 8426
3366 8452
TIME...MOT...LOC 2300Z 026DEG 14KT 3377 8430
$$1 follow-up statement
821
WWUS52 KFFC 202331
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
731 PM EDT SUN MAY 20 2012
GAC063-089-121-202341-
/O.CAN.KFFC.SV.W.0122.000000T0000Z-120520T2345Z/
DEKALB GA-CLAYTON GA-FULTON GA-
731 PM EDT SUN MAY 20 2012
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON...NORTHERN
CLAYTON AND WESTERN DEKALB COUNTIES IS CANCELLED...
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EAST
POINT...ELLENWOOD...HAPEVILLE...FORT GILLEM...REX...FOREST PARK...
COLLEGE PARK...HARTSFIELD-JACKSON AIRPORT AND LAKE CITY.
IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.
LAT...LON 3389 8431 3384 8420 3365 8424 3364 8428
3363 8426 3359 8425 3358 8425 3358 8426
3366 8452
TIME...MOT...LOC 2331Z 026DEG 14KT 3366 8436
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 8:28 PM EDT | Special Weather Statement | FFC | Towns, Union | 32 min |
| May 20, 3:55 PM EDT | Special Weather Statement | FFC | Walker | 35 min |
| May 20, 5:02 PM EDT | Special Weather Statement | FFC | Forsyth, Gwinnett | 28 min |
| May 20, 5:31 PM EDT | Special Weather Statement | FFC | Forsyth | 29 min |
| May 20, 6:08 PM EDT | Special Weather Statement | FFC | DeKalb, Fulton | 37 min |
| May 20, 6:09 PM EDT | Special Weather Statement | FFC | Lumpkin | 36 min |
| May 20, 6:27 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth | 22 min |
| May 20, 6:46 PM EDT | Special Weather Statement | FFC | DeKalb | 29 min |
| May 20, 7:28 PM EDT | Special Weather Statement | FFC | Union | 32 min |
| May 20, 7:36 PM EDT | Special Weather Statement | FFC | Clayton, Fayette | 24 min |
| May 20, 7:58 PM EDT | Special Weather Statement | FFC | Coweta, Fayette | 32 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2012Every severe thunderstorm warning in 2012
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.