Alert archive / Georgia / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 21, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Feb 18, 2009, 5:36 PM EST for 4 counties in Georgia. It was in force for 54 min. 6 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
- Feb 18, 2009, 5:36 PM EST (22:36 UTC)
- Expired
- Feb 18, 2009, 6:30 PM EST
- In force
- 54 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties Cobb County, GA, DeKalb County, GA, Fulton County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 63 km from the middle of the area, began a volume at 22:40 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 |
|---|---|---|---|
| Feb 18, 5:48 PM EST | HAIL 1.75 | Tucker, GA | |
| Feb 18, 5:50 PM EST | HAIL 0.88 | Tucker, GA | |
| Feb 18, 5:50 PM EST | HAIL 1 | Lilburn, GA | QUARTER SIZED HAIL REPORTED. |
| Feb 18, 6:00 PM EST | HAIL 1.75 | Lilburn, GA | |
| Feb 18, 6:03 PM EST | HAIL 1 | Sw Snellville, GA | |
| Feb 18, 6:05 PM EST | HAIL 1.75 | Chamblee, 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 |
|---|---|---|---|
| Feb 18, 3:32 PM EST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.6 hours before the alert went out and 60 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
- 588 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 605 m²/s²
- 0-3 km storm-relative helicity
- 895 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS52 KFFC 182236
SVRFFC
GAC067-089-121-135-182330-
/O.NEW.KFFC.SV.W.0021.090218T2236Z-090218T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
536 PM EST WED FEB 18 2009
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN COBB COUNTY IN NORTH CENTRAL GEORGIA
NORTHERN DEKALB COUNTY IN NORTH CENTRAL GEORGIA
CENTRAL FULTON COUNTY IN NORTH CENTRAL GEORGIA
SOUTHWESTERN GWINNETT COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 630 PM EST
* AT 535 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED HAIL...AND
DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
BUCKHEAD...MOVING EAST AT 50 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANDY
SPRINGS...DUNWOODY...DRUID HILLS...CHAMBLEE...DECATUR...
DORAVILLE...AVONDALE ESTATES...CLARKSTON...TUCKER...NORCROSS...PINE
LAKE...STONE MOUNTAIN...LILBURN AND SNELLVILLE.
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EST WEDNESDAY EVENING
FOR GEORGIA.
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 3393 8394 3372 8406 3375 8427 3379 8452
3397 8451
TIME...MOT...LOC 2236Z 271DEG 37KT 3388 8440
$$1 follow-up statement
000
WWUS52 KFFC 182325
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
625 PM EST WED FEB 18 2009
GAC067-089-121-135-182335-
/O.EXP.KFFC.SV.W.0021.000000T0000Z-090218T2330Z/
DEKALB GA-COBB GA-GWINNETT GA-FULTON GA-
625 PM EST WED FEB 18 2009
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FULTON...SOUTHWESTERN
GWINNETT...SOUTHEASTERN COBB AND NORTHERN DEKALB COUNTIES EXPIRES AT
630 PM EST...
AT 620 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE STORMS THAT EARLIER PROMPTED THE WARNING FOR DEKALB AND
FULTON COUNTY HAVE WEAKENED AND ARE NO LONGER EXPECTED TO BE
PRODUCING SEVERE WEATHER.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EST WEDNESDAY EVENING
FOR GEORGIA.
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
LAT...LON 3393 8394 3372 8406 3375 8427 3379 8452
3397 8451
TIME...MOT...LOC 2325Z 271DEG 37KT 3387 8379
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 3:43 PM EST | Severe Thunderstorm Warning | FFC | Bartow, Chattooga, Floyd, Gordon | 52 min |
| Feb 18, 3:52 PM EST | Wind Advisory | FFC | Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more | 27 hr |
| Feb 18, 4:19 PM EST | Severe Thunderstorm Warning | FFC | Chattahoochee, Marion, Muscogee | 41 min |
| Feb 18, 4:22 PM EST | Tornado Warning | FFC | Bartow, Cherokee | 38 min |
| Feb 18, 4:52 PM EST | Tornado Warning | FFC | Harris, Talbot | 38 min |
| Feb 18, 4:53 PM EST | Tornado Warning | FFC | Cherokee, Forsyth, Fulton | 37 min |
| Feb 18, 5:02 PM EST | Tornado Warning | FFC | Carroll | 43 min |
| Feb 18, 5:06 PM EST | Tornado Warning | FFC | Marion, Schley, Taylor | 24 min |
| Feb 18, 5:31 PM EST | Tornado Warning | FFC | Carroll, Coweta, Douglas, Fulton | 44 min |
| Feb 18, 5:32 PM EST | Tornado Warning | FFC | Talbot, Taylor | 27 min |
| Feb 18, 5:33 PM EST | Tornado Warning | FFC | Macon, Taylor | 22 min |
| Feb 18, 5:43 PM EST | Tornado Warning | FFC | DeKalb, Fulton, Gwinnett | 34 min |
| Feb 18, 5:54 PM EST | Tornado Warning | FFC | Clayton, Coweta, Fayette, Fulton, Henry, Spalding | 51 min |
| Feb 18, 5:59 PM EST | Tornado Warning | FFC | Gwinnett, Walton | 46 min |
| Feb 18, 6:01 PM EST | Severe Thunderstorm Warning | FFC | Crawford, Houston, Peach | 44 min |
| Feb 18, 6:13 PM EST | Tornado Warning | FFC | Carroll | 47 min |
| Feb 18, 6:19 PM EST | Tornado Warning | FFC | Houston, Twiggs | 26 min |
| Feb 18, 6:21 PM EST | Tornado Warning | FFC | Clarke, Greene, Morgan, Oconee, Oglethorpe, Walton | 54 min |
| Feb 18, 6:22 PM EST | Severe Thunderstorm Warning | FFC | Carroll, Haralson | 38 min |
| Feb 18, 6:33 PM EST | Tornado Warning | FFC | Butts, Henry, Jasper, Newton | 42 min |
| Feb 18, 6:44 PM EST | Tornado Warning | FFC | Bleckley, Laurens, Twiggs | 25 min |
| Feb 18, 6:48 PM EST | Tornado Warning | FFC | Wilkinson | 22 min |
| Feb 18, 6:50 PM EST | Tornado Warning | FFC | Jasper, Putnam | 55 min |
| Feb 18, 6:54 PM EST | Severe Thunderstorm Warning | FFC | Carroll, Coweta, Douglas, Fulton | 18 min |
| Feb 18, 6:58 PM EST | Tornado Warning | FFC | Greene, Oglethorpe, Taliaferro, Warren, Wilkes | 77 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2009Every severe thunderstorm warning in 2009
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.