Alert archive / Georgia / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 1, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Mar 1, 2018, 11:17 AM EST for 5 counties in Georgia. It was in force for 28 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
- Mar 1, 2018, 11:17 AM EST (16:17 UTC)
- Expired
- Mar 1, 2018, 11:45 AM EST
- In force
- 28 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cobb County, GA, DeKalb County, GA, Forsyth County, GA, Fulton County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 67 km from the middle of the area, began a volume at 16:20 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 |
|---|---|---|---|
| Mar 1, 11:21 AM EST | TSTM WND DMG | 2 W Marietta, GA | 2 TREES DOWN NEAR INTERSECTION OF BURNT HICKORY RD AND POLK ST |
| Mar 1, 11:21 AM EST | TSTM WND DMG | 2 W Marietta, GA | |
| Mar 1, 11:32 AM EST | TSTM WND GST 59 | 1 Ssw Dobbins Air Reser, GA | KMGE GUSTED TO 51KTS |
| Mar 1, 11:53 AM EST | TSTM WND DMG | 2 Ssw Lilburn, GA | ONE TREE DOWN NEAR THE INTERSECTION OF HARMONY GROVE ROAD AND ROSSER COURT. |
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, 4.3 hours before the alert went out and 66 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
- 212 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 241 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.7
The text
As transmitted.
866 WUUS52 KFFC 011617 SVRFFC GAC067-089-117-121-135-011645- /O.NEW.KFFC.SV.W.0001.180301T1617Z-180301T1645Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Peachtree City GA 1117 AM EST THU MAR 1 2018 The National Weather Service in Peachtree City has issued a * Severe Thunderstorm Warning for... Northwestern DeKalb County in north central Georgia... Southwestern Forsyth County in north central Georgia... Northern Cobb County in north central Georgia... Northwestern Gwinnett County in north central Georgia... Northeastern Fulton County in north central Georgia... * Until 1145 AM EST * At 1116 AM EST, a severe thunderstorm was located over Due West, or near Marietta, moving east at 55 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Atlanta, Marietta, Sandy Springs, Roswell, Johns Creek, Alpharetta, Smyrna, Dunwoody, Kennesaw, Duluth, Acworth, Sugar Hill, Snellville, Suwanee, Lilburn, Chamblee, Norcross, Doraville, Berkeley Lake and Fair Oaks. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. This thunderstorm can produce a brief tornado and widespread significant wind damage. Although a tornado is not immediately likely, it is best to move to an interior room on the lowest floor of a building. This storm may cause serious injury and significant property damage. 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 3389 8468 3403 8468 3413 8406 3385 8403 TIME...MOT...LOC 1616Z 266DEG 47KT 3396 8462 TORNADO...POSSIBLE HAIL...<.75IN WIND...60MPH $$
1 follow-up statement
991
WWUS52 KFFC 011641
SVSFFC
Severe Weather Statement
National Weather Service Peachtree City GA
1141 AM EST THU MAR 1 2018
GAC067-089-117-121-135-011651-
/O.EXP.KFFC.SV.W.0001.000000T0000Z-180301T1645Z/
DeKalb GA-Forsyth GA-Cobb GA-Gwinnett GA-Fulton GA-
1141 AM EST THU MAR 1 2018
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DEKALB...
SOUTHWESTERN FORSYTH...NORTHERN COBB...NORTHWESTERN GWINNETT AND
NORTHEASTERN FULTON COUNTIES WILL EXPIRE AT 1145 AM EST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
are still possible with this thunderstorm.
LAT...LON 3389 8468 3403 8468 3413 8406 3385 8403
TIME...MOT...LOC 1641Z 266DEG 47KT 3398 8425
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 8:51 PM EST | Special Weather Statement | FFC | Walker | 39 min |
| Feb 28, 9:26 PM EST | Special Weather Statement | FFC | Chattooga | 49 min |
| Feb 28, 10:36 PM EST | River Flood Warning | FFC | Walker | 24 hr |
| Feb 28, 10:51 PM EST | Special Weather Statement | FFC | Chattooga, Walker | 39 min |
| Feb 28, 11:23 PM EST | River Flood Warning | FFC | Murray, Whitfield | 55 hr |
| Feb 28, 11:30 PM EST | Special Weather Statement | FFC | Chattooga | 30 min |
| Feb 28, 11:31 PM EST | River Flood Warning | FFC | Whitfield | 4 days |
| Feb 28, 11:35 PM EST | River Flood Warning | FFC | Catoosa | 56 hr |
| Feb 28, 11:54 PM EST | Special Weather Statement | FFC | Gordon, Pickens | 51 min |
| Mar 1, 3:43 AM EST | Wind Advisory | FFC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Clarke and 58 more | 14 hr |
| Mar 1, 4:50 AM EST | River Flood Warning | FFC | Catoosa | 25 hr |
| Mar 1, 10:17 AM EST | Special Weather Statement | FFC | Bartow, Haralson, Polk | 43 min |
| Mar 1, 10:49 AM EST | Special Weather Statement | FFC | Carroll, Cherokee, Cobb, Douglas, Forsyth, Fulton and 2 more | 41 min |
| Mar 1, 11:29 AM EST | Special Weather Statement | FFC | Carroll, DeKalb, Douglas, Forsyth, Fulton, Gwinnett and 2 more | 46 min |
| Mar 1, 12:03 PM EST | Special Weather Statement | FFC | Barrow, Clayton, Coweta, DeKalb, Fayette, Gwinnett and 6 more | 42 min |
| Mar 1, 1:11 PM EST | Special Weather Statement | FFC | Morgan, Newton | 34 min |
| Mar 1, 1:37 PM EST | Special Weather Statement | FFC | Butts, Jasper | 23 min |
| Mar 1, 2:14 PM EST | Special Weather Statement | FFC | Talbot, Upson | 31 min |
| Mar 1, 2:42 PM EST | Special Weather Statement | FFC | Bibb, Crawford, Jones, Monroe, Upson | 48 min |
| Mar 1, 2:49 PM EST | Special Weather Statement | FFC | Baldwin, Hancock | 26 min |
| Mar 1, 3:13 PM EST | Special Weather Statement | FFC | Glascock, Jefferson | 47 min |
| Mar 1, 3:17 PM EST | Special Weather Statement | FFC | Houston, Macon, Marion, Peach | 43 min |
| Mar 1, 3:19 PM EST | Special Weather Statement | FFC | Baldwin, Bibb, Twiggs, Washington, Wilkinson | 41 min |
| Mar 1, 3:23 PM EST | Severe Thunderstorm Warning | FFC | Bibb, Laurens, Twiggs, Wilkinson | 37 min |
| Mar 1, 3:55 PM EST | Special Weather Statement | FFC | Jefferson, Johnson, Washington, Wilkinson | 50 min |
| Mar 1, 4:35 PM EST | Special Weather Statement | FFC | Emanuel | 25 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2018Every severe thunderstorm warning in 2018
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.