Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 316, NWS Atlanta, GA

August 30, 20174 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 30, 2017, 3:01 PM EDT for 4 counties in Georgia. It was in force for 44 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
Aug 30, 2017, 3:01 PM EDT (19:01 UTC)
Expired
Aug 30, 2017, 3:45 PM EDT
In force
44 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Marion County, GA, Schley County, GA, Sumter County, GA, Webster County, GA

The radar

The Robins AFB radar (KJGX), 111 km from the middle of the area, began a volume at 19:05 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.0 hours before the alert went out and 144 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 2017-08-30Temperature 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°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 2017-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
898 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

708 
WUUS52 KFFC 301901
SVRFFC
GAC197-249-261-307-301945-
/O.NEW.KFFC.SV.W.0316.170830T1901Z-170830T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
301 PM EDT WED AUG 30 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Marion County in west central Georgia...
  Webster County in west central Georgia...
  Schley County in west central Georgia...
  Sumter County in west central Georgia...

* Until 345 PM EDT

* At 300 PM EDT, a severe thunderstorm was located over Dumas, or
  near Preston, moving northeast at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Americus, Ellaville, Preston, Plains, Andersonville, Smithville,
  Sumter, Croxton Crossroads, New Era, La Crosse, Pennington,
  Friendship, Maddox, Bumphead, Centerpoint, Dumas and Walls
  Crossing.

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.

&&

LAT...LON 3197 8444 3193 8445 3192 8452 3202 8466
      3233 8433 3225 8422 3223 8422 3223 8417
      3222 8413 3219 8413 3219 8409 3218 8404
      3191 8424 3192 8434 3189 8434
TIME...MOT...LOC 1900Z 226DEG 31KT 3203 8446 

HAIL...<.75IN
WIND...60MPH
 
$$
2 follow-up statements
167 
WWUS52 KFFC 301917
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
317 PM EDT WED AUG 30 2017

GAC197-307-301927-
/O.CAN.KFFC.SV.W.0316.000000T0000Z-170830T1945Z/
Marion GA-Webster GA-
317 PM EDT WED AUG 30 2017

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

LAT...LON 3189 8434 3197 8444 3217 8443 3225 8422
      3223 8422 3222 8414 3219 8413 3219 8409
      3218 8404 3191 8424 3192 8434
TIME...MOT...LOC 1917Z 232DEG 30KT 3207 8429 

$$

GAC249-261-301945-
/O.CON.KFFC.SV.W.0316.000000T0000Z-170830T1945Z/
Schley GA-Sumter GA-
317 PM EDT WED AUG 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR SOUTHERN SCHLEY AND SUMTER COUNTIES...

At 317 PM EDT, a severe thunderstorm was located near Americus,
moving northeast at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Americus, Plains, Andersonville, Smithville, Sumter, Friendship,
Maddox, Bumphead, Croxton Crossroads, New Era, La Crosse and
Pennington.

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.

&&

LAT...LON 3189 8434 3197 8444 3217 8443 3225 8422
      3223 8422 3222 8414 3219 8413 3219 8409
      3218 8404 3191 8424 3192 8434
TIME...MOT...LOC 1917Z 232DEG 30KT 3207 8429 

HAIL...<.75IN
WIND...60MPH
 
$$
800 
WWUS52 KFFC 301928
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
328 PM EDT WED AUG 30 2017

GAC249-301938-
/O.CAN.KFFC.SV.W.0316.000000T0000Z-170830T1945Z/
Schley GA-
328 PM EDT WED AUG 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SCHLEY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area.  Therefore, the warning has been cancelled.

LAT...LON 3189 8434 3197 8444 3216 8434 3215 8423
      3215 8419 3218 8415 3219 8413 3219 8409
      3218 8404 3191 8424 3192 8434
TIME...MOT...LOC 1928Z 232DEG 28KT 3205 8421 

$$

GAC261-301945-
/O.CON.KFFC.SV.W.0316.000000T0000Z-170830T1945Z/
Sumter GA-
328 PM EDT WED AUG 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR WESTERN SUMTER COUNTY...

At 328 PM EDT, a severe thunderstorm was located over Americus,
moving northeast at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Americus, Plains, Smithville, Sumter, Maddox, Croxton Crossroads, New
Era and Pennington.

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.

&&

LAT...LON 3189 8434 3197 8444 3216 8434 3215 8423
      3215 8419 3218 8415 3219 8413 3219 8409
      3218 8404 3191 8424 3192 8434
TIME...MOT...LOC 1928Z 232DEG 28KT 3205 8421 

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

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 2:04 PM EDTSpecial Weather StatementFFCStewart26 min
Aug 30, 2:31 PM EDTSpecial Weather StatementFFCMarion, Stewart, Sumter, Webster44 min
Aug 30, 3:22 PM EDTSpecial Weather StatementFFCSumter23 min
Aug 30, 3:44 PM EDTSevere Thunderstorm WarningFFCCrisp, Dooly, Sumter46 min
Aug 30, 4:27 PM EDTTornado WarningFFCDodge, Telfair, Wilcox48 min
Aug 30, 5:14 PM EDTSevere Thunderstorm WarningFFCTelfair46 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017Every severe thunderstorm warning in 2017

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.