Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 85, NWS Jacksonville, FL

June 12, 2021Brantley County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 12, 2021, 5:20 PM EDT for Brantley County, Georgia. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 12, 2021, 5:20 PM EDT (21:20 UTC)
Expired: Jun 12, 2021, 5:45 PM EDT
In force: 25 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Brantley County, GA

The radar

The Jacksonville radar (KJAX), 90 km from the middle of the area, began a volume at 21:22 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.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.3 hours before the alert went out and 89 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 467 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1010 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

874 
WUUS52 KJAX 122120
SVRJAX
GAC025-122145-
/O.NEW.KJAX.SV.W.0085.210612T2120Z-210612T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
520 PM EDT Sat Jun 12 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Brantley County in southeastern Georgia...

* Until 545 PM EDT.

* At 520 PM EDT, a severe thunderstorm was located near Raybon, or 9
  miles northeast of Nahunta, moving southeast at 15 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Waynesville and Atkinson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

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.

&&

LAT...LON 3127 8175 3126 8176 3123 8176 3119 8189
      3134 8193 3135 8190 3135 8185 3136 8181
      3128 8175
TIME...MOT...LOC 2120Z 329DEG 12KT 3130 8187 

HAIL...1.25IN
WIND...60MPH
 
$$

HESS

1 follow-up statement

104 
WWUS52 KJAX 122135
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
535 PM EDT Sat Jun 12 2021

GAC025-122145-
/O.EXP.KJAX.SV.W.0085.000000T0000Z-210612T2145Z/
Brantley GA-
535 PM EDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BRANTLEY COUNTY
WILL EXPIRE AT 545 PM EDT...
                
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 small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 3127 8175 3126 8176 3123 8176 3119 8189
      3134 8193 3135 8190 3135 8185 3136 8181
      3128 8175
TIME...MOT...LOC 2135Z 329DEG 12KT 3127 8185 

$$

HESS

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 2:02 PM EDT	Special Weather Statement	JAX	Glynn	43 min
Jun 12, 2:46 PM EDT	Special Weather Statement	JAX	Echols	44 min
Jun 12, 3:22 PM EDT	Severe Thunderstorm Warning	JAX	Charlton, Clinch, Echols, Ware	53 min
Jun 12, 3:25 PM EDT	Special Weather Statement	JAX	Camden, Charlton	50 min
Jun 12, 3:46 PM EDT	Special Weather Statement	JAX	Wayne	44 min
Jun 12, 4:10 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Charlton, Clinch, Echols, Ware	25 min
Jun 12, 4:27 PM EDT	Special Weather Statement	JAX	Wayne	48 min
Jun 12, 4:37 PM EDT	Special Weather Statement	JAX	Camden	38 min
Jun 12, 5:00 PM EDT	Special Weather Statement	JAX	Brantley	30 min
Jun 12, 5:10 PM EDT	Special Weather Statement	JAX	Brantley, Pierce	50 min
Jun 12, 5:22 PM EDT	Special Weather Statement	JAX	Atkinson	53 min
Jun 12, 5:37 PM EDT	Special Weather Statement	JAX	Jeff Davis	38 min
Jun 12, 5:53 PM EDT	Special Weather Statement	JAX	Brantley, Pierce	52 min
Jun 12, 5:56 PM EDT	Special Weather Statement	JAX	Atkinson	49 min
Jun 12, 6:44 PM EDT	Special Weather Statement	JAX	Atkinson	46 min
Jun 12, 7:02 PM EDT	Special Weather Statement	JAX	Coffee	28 min
Jun 12, 7:12 PM EDT	Special Weather Statement	JAX	Wayne	33 min
Jun 12, 7:21 PM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Clinch, Coffee	39 min
Jun 12, 7:31 PM EDT	Special Weather Statement	JAX	Wayne	44 min
Jun 12, 7:42 PM EDT	Special Weather Statement	JAX	Appling, Jeff Davis	48 min
Jun 12, 7:45 PM EDT	Special Weather Statement	JAX	Bacon	30 min
Jun 12, 7:57 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis	33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.