Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 33, NWS Atlanta, GA

April 15, 20184 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2018, 11:51 AM EDT for 4 counties in Georgia. It was in force for 39 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: Apr 15, 2018, 11:51 AM EDT (15:51 UTC)
Expired: Apr 15, 2018, 12:30 PM EDT
In force: 39 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Emanuel County, GA, Montgomery County, GA, Toombs County, GA, Treutlen County, GA

The radar

The Robins AFB radar (KJGX), 112 km from the middle of the area, began a volume at 15:51 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
Apr 15, 11:53 AM EDT	TSTM WND DMG	3 W Higgston, GA	TREE REPORTED DOWN ON RABBIT RUN RD. AT THE INTERSECTION WITH MORRIS RD. THE TREE ALSO BROUGHT DOWN POWER LINES.

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.

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, 3.9 hours before the alert went out and 196 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.

420 
WUUS52 KFFC 151551
SVRFFC
GAC107-209-279-283-151630-
/O.NEW.KFFC.SV.W.0033.180415T1551Z-180415T1630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1151 AM EDT SUN APR 15 2018

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Toombs County in southeastern Georgia...
  South central Emanuel County in east central Georgia...
  Southeastern Treutlen County in east central Georgia...
  Northeastern Montgomery County in central Georgia...

* Until 1230 PM EDT

* At 1151 AM EDT, severe thunderstorms were located along a line
  extending from near Kibbee to near Vidalia to South Thompson to
  near Plant Hatch to near New Lacy, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Lyons, Vidalia, Stillmore, Oak Park, Higgston, Santa Claus, Center,
  Toombs Central, Ohoopee, New Branch, Ponderosa, Kibbee, South
  Thompson, English Eddy, Rock Springs, Cedar Crossing, Lexsy,
  Johnson Corner, Normantown and Grays Landing.

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.

&&

A tornado watch remains in effect until 600 PM EDT for central,
southeastern and east central Georgia.

LAT...LON 3252 8215 3248 8218 3243 8219 3235 8225
      3216 8218 3214 8220 3191 8223 3195 8231
      3193 8232 3196 8239 3195 8240 3197 8243
      3203 8243 3211 8247 3224 8257 3244 8249
TIME...MOT...LOC 1551Z 207DEG 45KT 3225 8253 3219 8243 3211 8239 3188
8239 3157 8241

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

1 follow-up statement

245 
WWUS52 KFFC 151611
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
1211 PM EDT SUN APR 15 2018

GAC209-151621-
/O.CAN.KFFC.SV.W.0033.000000T0000Z-180415T1630Z/
Montgomery GA-
1211 PM EDT SUN APR 15 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONTGOMERY COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the area! 
Therefore, the warning has been cancelled.

A tornado watch remains in effect until 600 PM EDT for central,
southeastern and east central Georgia.

LAT...LON 3252 8215 3248 8218 3243 8219 3235 8225
      3216 8218 3214 8220 3191 8223 3195 8231
      3193 8232 3196 8238 3196 8241 3195 8240
      3197 8243 3215 8243 3235 8241 3245 8243
TIME...MOT...LOC 1611Z 207DEG 45KT 3246 8241 3240 8231 3232 8227 3209
8227 3178 8229

$$

GAC107-279-283-151630-
/O.CON.KFFC.SV.W.0033.000000T0000Z-180415T1630Z/
Toombs GA-Emanuel GA-Treutlen GA-
1211 PM EDT SUN APR 15 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR TOOMBS...SOUTH CENTRAL EMANUEL AND EAST CENTRAL TREUTLEN
COUNTIES...

At 1211 PM EDT, severe thunderstorms were located along a line
extending from near Covena to near Oak Park to 6 miles east of
Normantown to New Branch to near Baxley, moving northeast at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Lyons, Vidalia, Stillmore, Oak Park, Santa Claus, Center, Toombs
Central, Ohoopee, New Branch, Ponderosa, South Thompson, English
Eddy, Rock Springs, Cedar Crossing, Lexsy, Johnson Corner, Normantown
and Grays Landing.

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.

&&

A tornado watch remains in effect until 600 PM EDT for central,
southeastern and east central Georgia.

LAT...LON 3252 8215 3248 8218 3243 8219 3235 8225
      3216 8218 3214 8220 3191 8223 3195 8231
      3193 8232 3196 8238 3196 8241 3195 8240
      3197 8243 3215 8243 3235 8241 3245 8243
TIME...MOT...LOC 1611Z 207DEG 45KT 3246 8241 3240 8231 3232 8227 3209
8227 3178 8229

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 8:29 PM EDT	Special Weather Statement	FFC	Floyd, Polk	46 min
Apr 14, 9:02 PM EDT	Special Weather Statement	FFC	Haralson	13 min
Apr 14, 9:15 PM EDT	Special Weather Statement	FFC	Chattooga, Floyd, Polk	30 min
Apr 14, 9:45 PM EDT	Special Weather Statement	FFC	Catoosa, Whitfield	30 min
Apr 14, 9:49 PM EDT	Special Weather Statement	FFC	Gordon, Murray, Whitfield	26 min
Apr 15, 5:22 AM EDT	River Flood Warning	FFC	Dade	25 hr
Apr 15, 9:08 AM EDT	Special Weather Statement	FFC	Crisp, Dooly	37 min
Apr 15, 9:47 AM EDT	Special Weather Statement	FFC	Bleckley, Crisp, Dooly, Houston, Macon, Pulaski and 1 more	28 min
Apr 15, 9:51 AM EDT	Special Weather Statement	FFC	Schley, Sumter	24 min
Apr 15, 10:18 AM EDT	Special Weather Statement	FFC	Dooly, Houston, Pulaski	42 min
Apr 15, 10:26 AM EDT	Severe Thunderstorm Warning	FFC	Dooly, Houston, Macon, Peach	26 min
Apr 15, 10:34 AM EDT	Special Weather Statement	FFC	Telfair	26 min
Apr 15, 11:02 AM EDT	Special Weather Statement	FFC	Jones, Twiggs	43 min
Apr 15, 11:05 AM EDT	Special Weather Statement	FFC	Montgomery, Wheeler	25 min
Apr 15, 11:18 AM EDT	Severe Thunderstorm Warning	FFC	Montgomery, Telfair, Toombs, Wheeler	42 min
Apr 15, 12:10 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel	50 min
Apr 15, 2:34 PM EDT	Special Weather Statement	FFC	Newton	26 min
Apr 15, 3:40 PM EDT	Special Weather Statement	FFC	Banks, Jackson	35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.