Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Jacksonville, FL

April 25, 2021Camden County, Glynn County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 25, 2021, 12:33 AM EDT for Camden County, Glynn County, Georgia. It was in force for 27 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: Apr 25, 2021, 12:33 AM EDT (04:33 UTC)
Expired: Apr 25, 2021, 1:00 AM EDT
In force: 27 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Camden County, GA, Glynn County, GA

The radar

The Jacksonville radar (KJAX), 89 km from the middle of the area, began a volume at 04:34 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 24, 8:48 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 4.6 hours before the alert went out and 87 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: 64 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 358 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

326 
WUUS52 KJAX 250433
SVRJAX
GAC039-127-250500-
/O.NEW.KJAX.SV.W.0064.210425T0433Z-210425T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
1233 AM EDT Sun Apr 25 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Camden County in southeastern Georgia...
  Central Glynn County in southeastern Georgia...

* Until 100 AM EDT.

* At 1233 AM EDT, a severe thunderstorm was located over Brunswick,
  moving east at 45 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...
  Brunswick, St. Simons Island, Dock Junction, Country Club Estates,
  Sea Island, Jekyll Island and Dover Bluff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3118 8126 3110 8137 3098 8139 3100 8173
      3128 8159 3130 8141 3129 8141 3128 8138
      3129 8139 3129 8138 3130 8137 3130 8134
      3131 8134 3130 8133 3129 8134 3128 8132
      3128 8123
TIME...MOT...LOC 0433Z 266DEG 41KT 3115 8147 

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

NELSON

1 follow-up statement

690 
WWUS52 KJAX 250451
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
1251 AM EDT Sun Apr 25 2021

GAC039-127-250501-
/O.EXP.KJAX.SV.W.0064.000000T0000Z-210425T0500Z/
Camden GA-Glynn GA-
1251 AM EDT Sun Apr 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CAMDEN AND
CENTRAL GLYNN COUNTIES WILL EXPIRE AT 100 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

LAT...LON 3118 8126 3110 8137 3098 8139 3100 8173
      3128 8159 3130 8141 3129 8141 3128 8138
      3129 8139 3129 8138 3130 8137 3130 8134
      3131 8134 3130 8133 3129 8134 3128 8132
      3128 8123
TIME...MOT...LOC 0451Z 266DEG 41KT 3116 8130 

$$

NELSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 8:13 PM EDT	Special Weather Statement	JAX	Wayne	32 min
Apr 24, 8:18 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis	27 min
Apr 24, 8:41 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis	49 min
Apr 24, 8:45 PM EDT	Flash Flood Warning	JAX	Appling, Bacon, Coffee, Jeff Davis	3 hr
Apr 24, 8:48 PM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Coffee	42 min
Apr 24, 8:51 PM EDT	Tornado Warning	JAX	Atkinson, Coffee	39 min
Apr 24, 9:00 PM EDT	Special Weather Statement	JAX	Wayne	45 min
Apr 24, 9:08 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Pierce, Ware	52 min
Apr 24, 9:16 PM EDT	Tornado Warning Tornado observed	JAX	Appling, Bacon, Coffee, Pierce, Ware	29 min
Apr 24, 9:33 PM EDT	Special Weather Statement	JAX	Atkinson, Coffee	42 min
Apr 24, 9:41 PM EDT	Tornado Warning	JAX	Bacon, Pierce, Ware	34 min
Apr 24, 9:45 PM EDT	Special Weather Statement	JAX	Appling	45 min
Apr 24, 9:50 PM EDT	Special Weather Statement	JAX	Clinch	85 min
Apr 24, 9:58 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Brantley, Glynn, Pierce, Wayne	48 min
Apr 24, 10:11 PM EDT	Special Weather Statement	JAX	Bacon, Pierce	34 min
Apr 24, 10:17 PM EDT	Severe Thunderstorm Warning	JAX	Clinch	43 min
Apr 24, 10:23 PM EDT	Special Weather Statement	JAX	Atkinson	52 min
Apr 24, 10:48 PM EDT	Special Weather Statement	JAX	Bacon, Brantley, Glynn, Pierce, Wayne	42 min
Apr 24, 10:54 PM EDT	Special Weather Statement	JAX	Clinch	66 min
Apr 24, 10:57 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Charlton, Clinch, Pierce, Ware	48 min
Apr 24, 11:05 PM EDT	Severe Thunderstorm Warning	JAX	Charlton, Clinch, Echols, Ware	55 min
Apr 24, 11:16 PM EDT	Special Weather Statement	JAX	Atkinson	44 min
Apr 24, 11:27 PM EDT	Special Weather Statement	JAX	Brantley, Glynn	63 min
Apr 24, 11:34 PM EDT	Special Weather Statement	JAX	Bacon, Pierce, Wayne	56 min
Apr 24, 11:40 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Charlton, Clinch, Ware	50 min
Apr 24, 11:46 PM EDT	Special Weather Statement	JAX	Camden, Charlton	44 min
Apr 24, 11:57 PM EDT	Special Weather Statement	JAX	Brantley, Pierce	63 min
Apr 25, 12:01 AM EDT	Severe Thunderstorm Warning	JAX	Brantley, Camden, Charlton, Glynn	44 min
Apr 25, 12:07 AM EDT	Severe Thunderstorm Warning	JAX	Wayne	23 min
Apr 25, 12:09 AM EDT	Special Weather Statement	JAX	Echols	51 min
Apr 25, 12:36 AM EDT	Severe Thunderstorm Warning	JAX	Clinch, Echols	39 min
Apr 25, 12:52 AM EDT	Special Weather Statement	JAX	Camden, Glynn, Ware	38 min
Apr 25, 12:58 AM EDT	Special Weather Statement	JAX	Charlton	62 min
Apr 25, 1:15 AM EDT	Severe Thunderstorm Warning	JAX	Clinch, Ware	23 min
Apr 25, 1:24 AM EDT	Special Weather Statement	JAX	Camden, Glynn	66 min
Apr 25, 1:38 AM EDT	Special Weather Statement	JAX	Charlton	67 min
Apr 25, 2:12 AM EDT	Severe Thunderstorm Warning	JAX	Charlton	36 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.