Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 41, NWS Atlanta, GA

April 24, 2021Cherokee County, Forsyth County, Fulton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 24, 2021, 6:50 PM EDT for Cherokee County, Forsyth County, Fulton County, Georgia. It was in force for 40 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
Apr 24, 2021, 6:50 PM EDT (22:50 UTC)
Expired
Apr 24, 2021, 7:30 PM EDT
In force
40 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Cherokee County, GA, Forsyth County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 104 km from the middle of the area, began a volume at 22:52 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

TimeReportWhereRemark
Apr 24, 7:00 PM EDTHAIL 12 Se Holbrook, GASPOTTER REPORTED QUARTER SIZE HAIL 2 MILES SE OF HOLBROOK.
Apr 24, 7:03 PM EDTHAIL 13 Ssw Drew, GATHE EMERGENCY MANAGER REPORTED QUARTER SIZE HAIL IN SOUTH FORSYTH COUNTY.
Apr 24, 7:03 PM EDTHAIL 13 Ssw Drew, GA
Apr 24, 7:18 PM EDTHAIL 11 Nne Coal Mountain, GAQUARTER-SIZED HAIL WAS REPORTED NEAR THE INTERSECTION OF HIGHWAY 9 AND HOPEWELL ROAD.
Apr 24, 7:18 PM EDTHAIL 1.251 Nne Coal Mountain, GAHAIL BETWEEN QUARTER AND HALF DOLLAR SIZE.
Apr 24, 7:23 PM EDTHAIL 12 Ese Silver City, 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.

IssuedProductOfficeLasted
Apr 24, 5:52 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.8 hours before the alert went out and 101 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2021-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 309 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
449 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
309 m²/s²
0-3 km storm-relative helicity
449 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

094 
WUUS52 KFFC 242250
SVRFFC
GAC057-117-121-242330-
/O.NEW.KFFC.SV.W.0041.210424T2250Z-210424T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
650 PM EDT Sat Apr 24 2021

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Cherokee County in north central Georgia...
  Forsyth County in north central Georgia...
  North central Fulton County in north central Georgia...

* Until 730 PM EDT.

* At 650 PM EDT, a severe thunderstorm was located near Alpharetta,
  or 12 miles southeast of Canton, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Cumming, Roswell, Alpharetta, Milton, Free Home, Drew, Coal
  Mountain, Hightower, Birmingham, Matt, Silver City, Chestatee,
  Oscarville, Holbrook, Lathemtown, Ducktown and War Hill Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. 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 or tweet us your report at NWSATLANTA.

&&

LAT...LON 3433 8395 3421 8397 3420 8398 3419 8401
      3420 8402 3419 8405 3417 8406 3414 8409
      3403 8438 3410 8445 3434 8423 3434 8398
TIME...MOT...LOC 2250Z 232DEG 33KT 3409 8435 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
254 
WWUS52 KFFC 242309
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
709 PM EDT Sat Apr 24 2021

GAC057-121-242317-
/O.CAN.KFFC.SV.W.0041.000000T0000Z-210424T2330Z/
Cherokee GA-Fulton GA-
709 PM EDT Sat Apr 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHEROKEE AND
NORTH CENTRAL FULTON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area.  Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
north central Georgia.

LAT...LON 3433 8395 3421 8397 3421 8398 3420 8399
      3419 8401 3420 8402 3419 8405 3414 8409
      3409 8421 3410 8422 3410 8423 3411 8426
      3431 8426 3434 8423 3434 8398
TIME...MOT...LOC 2307Z 229DEG 36KT 3421 8418 

$$

GAC117-242330-
/O.CON.KFFC.SV.W.0041.000000T0000Z-210424T2330Z/
Forsyth GA-
709 PM EDT Sat Apr 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR FORSYTH COUNTY...

At 707 PM EDT, a severe thunderstorm was located over Cumming, moving
northeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Public. At 703 PM quarter sized hail was reported over 
         southwestern portions of Forsyth County.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Cumming, Matt, Drew, Silver City, Chestatee, Oscarville, Ducktown,
Coal Mountain, Hightower and War Hill Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3433 8395 3421 8397 3421 8398 3420 8399
      3419 8401 3420 8402 3419 8405 3414 8409
      3409 8421 3410 8422 3410 8423 3411 8426
      3431 8426 3434 8423 3434 8398
TIME...MOT...LOC 2307Z 229DEG 36KT 3421 8418 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 8:57 AM EDTSpecial Weather StatementFFCStewart33 min
Apr 24, 10:19 AM EDTSpecial Weather StatementFFCWilcox26 min
Apr 24, 4:36 PM EDTSpecial Weather StatementFFCCoweta24 min
Apr 24, 4:50 PM EDTSpecial Weather StatementFFCCarroll25 min
Apr 24, 4:56 PM EDTSpecial Weather StatementFFCClayton, DeKalb34 min
Apr 24, 5:09 PM EDTSevere Thunderstorm WarningFFCClayton, DeKalb, Fulton, Gwinnett, Newton, Rockdale and 1 more51 min
Apr 24, 5:11 PM EDTSpecial Weather StatementFFCDouglas34 min
Apr 24, 5:22 PM EDTSpecial Weather StatementFFCHeard23 min
Apr 24, 5:32 PM EDTSevere Thunderstorm WarningFFCHarris, Meriwether, Troup43 min
Apr 24, 5:36 PM EDTSpecial Weather StatementFFCFulton24 min
Apr 24, 5:40 PM EDTSpecial Weather StatementFFCCarroll, Douglas35 min
Apr 24, 5:41 PM EDTSpecial Weather StatementFFCJasper, Putnam34 min
Apr 24, 5:42 PM EDTSpecial Weather StatementFFCHeard33 min
Apr 24, 5:53 PM EDTSpecial Weather StatementFFCBarrow, Gwinnett, Jackson52 min
Apr 24, 5:57 PM EDTSpecial Weather StatementFFCForsyth, Hall48 min
Apr 24, 6:09 PM EDTSevere Thunderstorm WarningFFCClayton, Coweta, Fayette, Meriwether, Spalding, Troup26 min
Apr 24, 6:42 PM EDTSpecial Weather StatementFFCClarke, Madison33 min
Apr 24, 6:44 PM EDTSpecial Weather StatementFFCForsyth31 min
Apr 24, 6:49 PM EDTSevere Thunderstorm WarningFFCChattooga, Floyd26 min
Apr 24, 7:02 PM EDTSpecial Weather StatementFFCTalbot28 min
Apr 24, 7:05 PM EDTSpecial Weather StatementFFCHaralson25 min
Apr 24, 7:06 PM EDTSpecial Weather StatementFFCChattooga24 min
Apr 24, 7:14 PM EDTSevere Thunderstorm WarningFFCHaralson, Polk46 min
Apr 24, 7:22 PM EDTSevere Thunderstorm WarningFFCDawson, Forsyth, Hall, Lumpkin, White38 min
Apr 24, 7:23 PM EDTSevere Thunderstorm WarningFFCCarroll, Haralson, Paulding52 min
Apr 24, 7:40 PM EDTSevere Thunderstorm WarningFFCBartow, Cobb, Haralson, Paulding, Polk50 min
Apr 24, 7:40 PM EDTSevere Thunderstorm WarningFFCCarroll, Coweta, Douglas, Fulton, Heard35 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.