Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 9, NWS Atlanta, GA

January 3, 20176 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 3, 2017, 12:30 AM EST for 6 counties in Georgia. It was in force for 45 min. 4 reports 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: Jan 3, 2017, 12:30 AM EST (05:30 UTC)
Expired: Jan 3, 2017, 1:15 AM EST
In force: 45 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

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

The radar

The Robins AFB radar (KJGX), 103 km from the middle of the area, began a volume at 05:29 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
Jan 3, 12:36 AM EST	TSTM WND DMG	1 W Kibbee, GA	SEVERAL REPORTS OF TREES DOWN ON THE WEST SIDE AND NORTH SIDE OF THE COUNTY. DETAILS STILL COMING IN
Jan 3, 12:36 AM EST	TSTM WND DMG	4 Nne Ochwalkee, GA	TREE DOWN NEAR INTERSECTION OF HWY 199 AND HWY 221... TIME OF EVENT ESTIMATED FROM RADAR DATA.
Jan 3, 12:50 AM EST	TSTM WND DMG	3 E Kibbee, GA	4 TREES DOWN AROUND PARADICE CIRCLE... TIME OF EVENT ESTIMATED FROM RADAR
Jan 3, 12:55 AM EST	TSTM WND DMG	Zaidee, GA	4 TREES REPORTED DOWN ALONG OLD LOUISVILLE RD. NEAR MONTGOMERY COUNTY BORDER. TIME OF EVENT ESTIMATED FROM RADAR

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
Jan 2, 10:27 PM EST	Tornado Watch	SPC	3 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 5.5 hours before the alert went out and 218 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: 1191 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

591 
WUUS52 KFFC 030530
SVRFFC
GAC107-175-209-279-283-309-030615-
/O.NEW.KFFC.SV.W.0009.170103T0530Z-170103T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1230 AM EST TUE JAN 3 2017

The National Weather Service in Peachtree City has issued a

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

* Until 115 AM EST

* At 1229 AM EST, a severe thunderstorm was located near Landsburg,
  or near Mount Vernon, moving northeast at 45 mph.

  HAZARD...70 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Swainsboro, Lyons, Soperton, Mount Vernon, Vidalia, Twin City,
  Glenwood, Stillmore, Oak Park, Ailey, Higgston, Nunez, Tarrytown,
  Gillis Springs, Covena, Barnhill, Ponderosa, Normantown, Lothair
  and Zaidee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

This is a DANGEROUS SITUATION. This storm is producing wind damage
across Crisp...Wilcox...and Dodge Counties. SEEK SHELTER NOW inside
a sturdy structure and stay away from windows!

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 300 AM EST for southeastern,
central and east central Georgia.

LAT...LON 3251 8215 3248 8218 3242 8219 3235 8225
      3235 8224 3220 8220 3210 8273 3230 8288
      3266 8213
TIME...MOT...LOC 0529Z 246DEG 38KT 3226 8263 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 2, 7:15 PM EST	Special Weather Statement	FFC	Marion	30 min
Jan 2, 7:26 PM EST	Special Weather Statement	FFC	Chattahoochee, Muscogee	64 min
Jan 2, 7:29 PM EST	Severe Thunderstorm Warning	FFC	Marion, Talbot, Taylor	16 min
Jan 2, 7:45 PM EST	Flash Flood Warning	FFC	Chattahoochee, Muscogee	6 hr
Jan 2, 8:34 PM EST	Special Weather Statement	FFC	Crawford, Monroe, Taylor	26 min
Jan 2, 9:02 PM EST	Special Weather Statement	FFC	Crawford, Monroe	28 min
Jan 2, 10:51 PM EST	Severe Thunderstorm Warning	FFC	Crisp, Wilcox	39 min
Jan 2, 11:13 PM EST	Severe Thunderstorm Warning	FFC	Dodge, Pulaski, Telfair, Wilcox	47 min
Jan 2, 11:31 PM EST	Severe Thunderstorm Warning	FFC	Dodge, Laurens, Telfair, Wheeler	44 min
Jan 2, 11:57 PM EST	Wind Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more	3 hr
Jan 3, 12:15 AM EST	Severe Thunderstorm Warning	FFC	Emanuel, Johnson, Laurens, Montgomery, Treutlen, Wheeler	45 min
Jan 3, 12:36 AM EST	River Flood Warning	FFC	Gwinnett	24 hr
Jan 3, 12:36 AM EST	River Flood Warning	FFC	Forsyth, Fulton, Gwinnett	6 days
Jan 3, 4:06 AM EST	River Flood Warning	FFC	Bleckley, Pulaski	72 hr
Jan 3, 4:06 AM EST	River Flood Warning	FFC	Dodge, Telfair, Wilcox	30 hr
Jan 3, 6:40 AM EST	River Flood Warning	FFC	Bibb, Crawford, Houston, Peach	40 hr
Jan 3, 7:28 AM EST	River Flood Warning	FFC	Bibb, Houston, Jones, Monroe, Twiggs	48 hr
Jan 3, 2:50 PM EST	River Flood Warning	FFC	Coweta, Fayette, Spalding	24 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.