Alert archive / Georgia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 286, NWS Atlanta, GA

December 29, 2016Houston County, Macon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Dec 29, 2016, 9:32 AM EST for Houston County, Macon County, Georgia. It was in force for 28 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: Dec 29, 2016, 9:32 AM EST (14:32 UTC)
Expired: Dec 29, 2016, 10:00 AM EST
In force: 28 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Houston County, GA, Macon County, GA

The radar

The Robins AFB radar (KJGX), 52 km from the middle of the area, began a volume at 14:31 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
Dec 29, 9:38 AM EST	TSTM WND DMG	2 Ese Marshallville, GA	1 TREE REPORTED DOWN NEAR THE INTERSECTION OF HWY 127E AND ORCHARD RD... 2.3 MILES ESE OF MARSHALLVILLE... GA. TREE WAS DOWN OVER BOTH SIDES OF THE ROAD... BLOCKING TRAFFIC... AND BROUGHT DOWN POWER LINES AS WELL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.5 hours before the alert went out and 124 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: 405 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 631 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

710 
WUUS52 KFFC 291432
SVRFFC
GAC153-193-291500-
/O.NEW.KFFC.SV.W.0286.161229T1432Z-161229T1500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service PEACHTREE CITY GA
932 AM EST THU DEC 29 2016

The National Weather Service in PEACHTREE CITY has issued a

* Severe Thunderstorm Warning for...
  Southwestern Houston County in central Georgia...
  East central Macon County in west central Georgia...

* Until 1000 AM EST

* At 932 AM EST, a severe thunderstorm was located over Winchester,
  or 10 miles south of Fort Valley, moving east at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Perry, Marshallville, Grove Park, Clinchfield, Moss Oak, Grovania,
  Meadowdale, Winchester, Elko, Hayneville, Henderson and Klondike.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm is capable of producing all types of severe weather
including destructive straight line winds and tornadoes. Move quickly 
to a safe shelter such as an interior room, a bathroom, closet or 
basement.

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 3239 8399 3245 8398 3245 8383 3244 8383
      3244 8382 3245 8382 3245 8364 3235 8357
      3229 8367
TIME...MOT...LOC 1432Z 278DEG 38KT 3241 8393 

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

1 follow-up statement

840 
WWUS52 KFFC 291453
SVSFFC

Severe Weather Statement
National Weather Service PEACHTREE CITY GA
953 AM EST THU DEC 29 2016

GAC193-291501-
/O.CAN.KFFC.SV.W.0286.000000T0000Z-161229T1500Z/
Macon GA-
953 AM EST THU DEC 29 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MACON 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 3236 8384 3242 8382 3245 8379 3245 8364
      3235 8357 3230 8365
TIME...MOT...LOC 1451Z 278DEG 28KT 3239 8376 

$$

GAC153-291500-
/O.CON.KFFC.SV.W.0286.000000T0000Z-161229T1500Z/
Houston GA-
953 AM EST THU DEC 29 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM EST
FOR SOUTHWESTERN HOUSTON COUNTY...

At 951 AM EST, a severe thunderstorm was located over Grove Park, or
near Perry, moving east at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Trained weather spotters reported trees down with this
         storm. 

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

Locations impacted include...
Perry, Grove Park, Clinchfield, Moss Oak, Grovania, Meadowdale, Elko,
Hayneville and Klondike.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This thunderstorm is capable of producing all types of severe weather
including destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

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 3236 8384 3242 8382 3245 8379 3245 8364
      3235 8357 3230 8365
TIME...MOT...LOC 1451Z 278DEG 28KT 3239 8376 

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
Dec 29, 12:14 AM EST	Special Weather Statement	FFC	Catoosa, Dade, Walker	46 min
Dec 29, 12:44 AM EST	Special Weather Statement	FFC	Murray, Whitfield	31 min
Dec 29, 3:06 AM EST	Special Weather Statement	FFC	Forsyth	24 min
Dec 29, 3:18 AM EST	Special Weather Statement	FFC	Gwinnett	27 min
Dec 29, 3:31 AM EST	Special Weather Statement	FFC	Jackson	29 min
Dec 29, 3:38 AM EST	Severe Thunderstorm Warning	FFC	Banks, Barrow, Clarke, Hall, Jackson	37 min
Dec 29, 4:12 AM EST	Special Weather Statement	FFC	Clarke, Oglethorpe	33 min
Dec 29, 4:26 AM EST	Special Weather Statement	FFC	Madison	34 min
Dec 29, 4:35 AM EST	Special Weather Statement	FFC	Coweta	25 min
Dec 29, 5:13 AM EST	Special Weather Statement	FFC	Newton	32 min
Dec 29, 5:30 AM EST	Special Weather Statement	FFC	Oglethorpe	30 min
Dec 29, 5:52 AM EST	Special Weather Statement	FFC	Putnam	23 min
Dec 29, 7:20 AM EST	Special Weather Statement	FFC	Hancock	25 min
Dec 29, 7:28 AM EST	Special Weather Statement	FFC	Crawford	32 min
Dec 29, 8:01 AM EST	Special Weather Statement	FFC	Glascock, Jefferson	29 min
Dec 29, 8:07 AM EST	Special Weather Statement	FFC	Hancock	23 min
Dec 29, 8:14 AM EST	Special Weather Statement	FFC	Talbot	31 min
Dec 29, 8:27 AM EST	Tornado Warning	FFC	Marion, Talbot	19 min
Dec 29, 9:06 AM EST	Tornado Warning	FFC	Macon, Taylor	24 min
Dec 29, 10:05 AM EST	Special Weather Statement	FFC	Pulaski	25 min
Dec 29, 10:34 AM EST	Special Weather Statement	FFC	Laurens	26 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2016 Every severe thunderstorm warning in 2016

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.