Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Jacksonville, FL

April 15, 2018Atkinson County, Coffee County, Jeff Davis County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 15, 2018, 10:14 AM EDT for Atkinson County, Coffee County, Jeff Davis County, Georgia. It was in force for 61 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 15, 2018, 10:14 AM EDT (14:14 UTC)
Expired: Apr 15, 2018, 11:15 AM EDT
In force: 61 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Atkinson County, GA, Coffee County, GA, Jeff Davis County, GA

The radar

The Moody AFB radar (KVAX), 75 km from the middle of the area, began a volume at 14:14 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 15, 10:12 AM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 2.2 hours before the alert went out and 164 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: 651 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 809 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

063 
WUUS52 KJAX 151414
SVRJAX
GAC003-069-161-151515-
/O.NEW.KJAX.SV.W.0021.180415T1414Z-180415T1515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
1014 AM EDT SUN APR 15 2018

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Coffee County in southeastern Georgia...
  Atkinson County in southeastern Georgia...
  Southwestern Jeff Davis County in southeastern Georgia...

* Until 1115 AM EDT.

* At 1013 AM EDT, severe thunderstorms were located along a line
  extending from near Mystic to near Alapaha to near Moody Air Force
  Base, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Douglas, Pearson, Willacoochee, Broxton, Ambrose, Pridgen, West
  Green, Snipesville, Denton and Axson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A Tornado Watch remains in effect until 600 PM EDT for southeastern
Georgia.

LAT...LON 3175 8265 3128 8267 3127 8270 3118 8268
      3119 8305 3128 8303 3134 8307 3140 8314
      3146 8315 3151 8308 3161 8306 3166 8300
      3179 8299 3178 8287 3184 8278 3185 8279
      3186 8276 3188 8274
TIME...MOT...LOC 1413Z 227DEG 39KT 3164 8338 3133 8322 3098 8326 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

NELSON

2 follow-up statements

051 
WWUS52 KJAX 151436
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
1036 AM EDT SUN APR 15 2018

GAC003-069-161-151515-
/O.CON.KJAX.SV.W.0021.000000T0000Z-180415T1515Z/
Coffee GA-Atkinson GA-Jeff Davis GA-
1036 AM EDT SUN APR 15 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR COFFEE...ATKINSON AND SOUTHWESTERN JEFF DAVIS COUNTIES...

At 1035 AM EDT, severe thunderstorms were located along a line
extending from 8 miles east of Fitzgerald to 8 miles north of
Willacoochee to 6 miles south of Lakeland, moving northeast at 45
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Douglas, Pearson, Willacoochee, Broxton, Ambrose, Pridgen, West
Green, Snipesville, Denton and Axson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A Tornado Watch remains in effect until 600 PM EDT for southeastern
Georgia.

LAT...LON 3175 8265 3128 8267 3127 8270 3118 8268
      3119 8305 3128 8303 3134 8307 3140 8314
      3146 8315 3151 8308 3161 8306 3166 8300
      3179 8299 3178 8287 3184 8278 3185 8279
      3186 8276 3188 8274
TIME...MOT...LOC 1435Z 228DEG 38KT 3176 8312 3146 8303 3095 8304 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

NELSON

885 
WWUS52 KJAX 151456
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
1056 AM EDT SUN APR 15 2018

GAC003-069-161-151515-
/O.CON.KJAX.SV.W.0021.000000T0000Z-180415T1515Z/
Coffee GA-Atkinson GA-Jeff Davis GA-
1056 AM EDT SUN APR 15 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR COFFEE...ATKINSON AND SOUTHWESTERN JEFF DAVIS COUNTIES...

At 1056 AM EDT, a severe thunderstorm was located near Pearson,
moving northeast at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Douglas, Pearson, Broxton, Pridgen, West Green, Snipesville, Denton
and Axson.

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.

&&

A Tornado Watch remains in effect until 600 PM EDT for southeastern
Georgia.

LAT...LON 3119 8293 3147 8298 3165 8299 3178 8298
      3177 8286 3183 8277 3184 8278 3185 8275
      3187 8273 3175 8265 3128 8267 3127 8270
      3118 8268
TIME...MOT...LOC 1456Z 206DEG 44KT 3129 8293 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

NELSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 3:24 AM EDT	Wind Advisory	JAX	Appling, Atkinson, Bacon, Brantley, Camden, Clinch and 6 more	13 hr
Apr 15, 9:57 AM EDT	Special Weather Statement	JAX	Atkinson, Coffee, Echols	63 min
Apr 15, 10:09 AM EDT	Severe Thunderstorm Warning	JAX	Clinch, Echols	66 min
Apr 15, 11:05 AM EDT	Special Weather Statement	JAX	Appling, Bacon, Jeff Davis	55 min
Apr 15, 11:13 AM EDT	Severe Thunderstorm Warning	JAX	Atkinson, Bacon, Clinch, Echols, Ware	47 min
Apr 15, 11:15 AM EDT	Severe Thunderstorm Warning	JAX	Appling, Atkinson, Bacon, Coffee, Jeff Davis, Ware	45 min
Apr 15, 11:56 AM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Jeff Davis, Pierce, Wayne	49 min
Apr 15, 12:01 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Charlton, Clinch, Ware	44 min
Apr 15, 12:42 PM EDT	Special Weather Statement	JAX	Brantley, Charlton, Wayne	63 min
Apr 15, 1:38 PM EDT	Special Weather Statement	JAX	Brantley, Charlton	52 min
Apr 15, 2:14 PM EDT	Special Weather Statement	JAX	Camden	46 min
Apr 15, 2:15 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Glynn, Wayne	45 min
Apr 15, 2:23 PM EDT	Severe Thunderstorm Warning	JAX	Camden	52 min
Apr 15, 2:34 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	41 min
Apr 15, 2:54 PM EDT	Tornado Warning	JAX	Camden, Glynn	27 min
Apr 15, 3:14 PM EDT	Severe Thunderstorm Warning	JAX	Camden	46 min
Apr 15, 3:23 PM EDT	Severe Thunderstorm Warning	JAX	Camden, Glynn	52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.