Alert archive / Georgia / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 104, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jun 30, 2021, 8:37 PM EDT for Cobb County, Georgia. It was in force for 38 min. 1 report 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
- Jun 30, 2021, 8:37 PM EDT (00:37 UTC)
- Expired
- Jun 30, 2021, 9:15 PM EDT
- In force
- 38 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Cobb County, GA
The radar
The Atlanta radar (KFFC), 68 km from the middle of the area, began a volume at 00:40 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 |
|---|---|---|---|
| Jun 30, 8:50 PM EDT | TSTM WND DMG | 1 W Lost Mountain Park, GA | TREE DOWNED ONTO A POWER LINE NEAR THE INTERSECTION OF DALLAS HWY AND HOLLAND RD. |
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 00:00Z, 0.6 hours before the alert went out and 68 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
- 1062 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1394 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- -31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
991
WUUS52 KFFC 010037
SVRFFC
GAC067-010115-
/O.NEW.KFFC.SV.W.0104.210701T0037Z-210701T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
837 PM EDT Wed Jun 30 2021
The National Weather Service in Peachtree City has issued a
* Severe Thunderstorm Warning for...
Northern Cobb County in north central Georgia...
* Until 915 PM EDT.
* At 837 PM EDT, a severe thunderstorm was located over Jim R Miller
Park, or over Marietta, moving northwest at 5 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Marietta, Smyrna, Kennesaw, Acworth, Fair Oaks, White Water Park,
Due West, Lost Mountain Park, Kennesaw State University, Dobbins
Air Reserve Base and Jim R Miller Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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 3403 8472 3407 8460 3395 8446 3385 8454
3392 8473
TIME...MOT...LOC 0037Z 123DEG 5KT 3393 8459
HAIL...<.75IN
WIND...60MPH
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:04 PM EDT | Special Weather Statement | FFC | Forsyth | 26 min |
| Jun 30, 8:31 PM EDT | Special Weather Statement | FFC | Cobb | 29 min |
| Jun 30, 8:33 PM EDT | Special Weather Statement | FFC | Cobb | 27 min |
| Jul 1, 7:51 PM EDT | Special Weather Statement | FFC | Bibb | 24 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2021Every severe thunderstorm warning in 2021
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.