Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 8, NWS Atlanta, GA

January 3, 20176 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 3, 2017, 12:15 AM EST for 6 counties in Georgia. It was in force for 45 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: Jan 3, 2017, 12:15 AM EST (05:15 UTC)
Expired: Jan 3, 2017, 1:00 AM EST
In force: 45 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Robins AFB radar (KJGX), 77 km from the middle of the area, began a volume at 05:16 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, 12:55 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, 5.3 hours before the alert went out and 221 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.

856 
WUUS52 KFFC 030515
SVRFFC
GAC107-167-175-209-283-309-030600-
/O.NEW.KFFC.SV.W.0008.170103T0515Z-170103T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1215 AM EST TUE JAN 3 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northern Montgomery County in central Georgia...
  Southeastern Johnson County in east central Georgia...
  Treutlen County in east central Georgia...
  Northwestern Wheeler County in central Georgia...
  Southeastern Laurens County in central Georgia...
  Southwestern Emanuel County in east central Georgia...

* Until 100 AM EST

* At 1215 AM EST, a severe thunderstorm was located near Lowery, or
  10 miles north of Alamo, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Soperton, Adrian, Tarrytown, Gillis Springs, Rockledge, Barnhill,
  Lothair, Orland, Orianna, Zaidee, Minter, Cedar Grove, Blackville,
  Scott, Norristown and Lowery.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

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

This is an EXTREMELY DANGEROUS SITUATION. This storm is producing
wind damage across Crisp and Wilcox 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,
east central and central Georgia.

LAT...LON 3237 8235 3235 8240 3235 8241 3233 8245
      3217 8289 3219 8287 3220 8289 3218 8292
      3232 8300 3263 8257
TIME...MOT...LOC 0515Z 237DEG 42KT 3230 8281 

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

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, 12:30 AM EST	Severe Thunderstorm Warning	FFC	Emanuel, Laurens, Montgomery, Toombs, 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.