Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 19, NWS Atlanta, GA

January 21, 20174 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 21, 2017, 1:05 PM EST for 4 counties in Georgia. It was in force for 40 min. 3 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 21, 2017, 1:05 PM EST (18:05 UTC)
Expired: Jan 21, 2017, 1:45 PM EST
In force: 40 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Johnson County, GA, Laurens County, GA, Washington County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 32 km from the middle of the area, began a volume at 18:07 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 21, 1:08 PM EST	TSTM WND DMG	5 S Irwinton, GA	TREES WERE BLOWN DOWN ONTO HIGHWAY 96.
Jan 21, 1:19 PM EST	TSTM WND DMG	Toomsboro, GA	NUMEROUS TREES WERE BLOWN DOWN IN SOUTHERN WILKINSON COUNTY...PRIMARILY IN THE TOOMSBORO AREA.
Jan 21, 1:20 PM EST	TORNADO	4 Sw Tuckers Crossroad, GA	BRIEF WEAK TORNADO BEGAN JUST WEST OF BUCKEYE RD AND PROGRESSED EAST AND THEN NORTHEAST. UPROOTED TREES WITH SOME FALLING NEAR BUCKEYE RD AREA.

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 21, 9:04 AM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.1 hours before the alert went out and 155 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: 388 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 536 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

881 
WUUS52 KFFC 211805
SVRFFC
GAC167-175-303-319-211845-
/O.NEW.KFFC.SV.W.0019.170121T1805Z-170121T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
105 PM EST SAT JAN 21 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northwestern Laurens County in central Georgia...
  Eastern Wilkinson County in central Georgia...
  Southwestern Washington County in east central Georgia...
  Northwestern Johnson County in east central Georgia...

* Until 145 PM EST

* At 105 PM EST, a severe thunderstorm was located near Irwinton,
  moving east at 55 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...
  Irwinton, McIntyre, Toomsboro, Oconee, Chappells Mill, Tuckers
  Crossroad and Nicklesville.

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 300 PM EST for central and
east central Georgia.

LAT...LON 3256 8311 3284 8326 3296 8297 3284 8286
      3264 8281
TIME...MOT...LOC 1805Z 248DEG 49KT 3274 8318 

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 21, 7:52 AM EST	Special Weather Statement	FFC	Heard, Troup	38 min
Jan 21, 8:28 AM EST	Special Weather Statement	FFC	Troup	32 min
Jan 21, 8:33 AM EST	Tornado Warning	FFC	Troup	27 min
Jan 21, 8:55 AM EST	Severe Thunderstorm Warning	FFC	Meriwether, Troup	35 min
Jan 21, 9:23 AM EST	Special Weather Statement	FFC	Coweta	37 min
Jan 21, 10:04 AM EST	Special Weather Statement	FFC	Coweta, Fayette, Troup	56 min
Jan 21, 10:14 AM EST	Severe Thunderstorm Warning	FFC	Harris, Muscogee	46 min
Jan 21, 10:22 AM EST	Special Weather Statement	FFC	Chattahoochee, Stewart	38 min
Jan 21, 10:35 AM EST	Tornado Warning	FFC	Harris, Muscogee, Talbot	25 min
Jan 21, 11:00 AM EST	Severe Thunderstorm Warning	FFC	Talbot, Upson	30 min
Jan 21, 11:01 AM EST	Special Weather Statement	FFC	Coweta, Fayette, Heard, Troup	59 min
Jan 21, 11:10 AM EST	Tornado Warning	FFC	Meriwether, Talbot, Upson	32 min
Jan 21, 11:16 AM EST	Severe Thunderstorm Warning	FFC	Taylor	29 min
Jan 21, 11:26 AM EST	Tornado Warning Tornado observed	FFC	Crawford, Taylor, Upson	34 min
Jan 21, 11:36 AM EST	Special Weather Statement	FFC	Coweta, Fayette	39 min
Jan 21, 11:39 AM EST	Severe Thunderstorm Warning	FFC	Lamar, Pike, Upson	36 min
Jan 21, 11:46 AM EST	Special Weather Statement	FFC	Macon, Peach, Schley, Sumter	44 min
Jan 21, 11:50 AM EST	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Monroe	25 min
Jan 21, 11:56 AM EST	Tornado Warning	FFC	Lamar	14 min
Jan 21, 12:04 PM EST	Severe Thunderstorm Warning	FFC	Houston, Macon, Peach	26 min
Jan 21, 12:06 PM EST	Tornado Warning	FFC	Houston, Macon, Peach	24 min
Jan 21, 12:10 PM EST	Special Weather Statement	FFC	Clayton, Fayette, Henry, Spalding	50 min
Jan 21, 12:13 PM EST	Tornado Warning Tornado observed	FFC	Monroe	15 min
Jan 21, 12:21 PM EST	Tornado Warning	FFC	Houston, Peach, Twiggs	24 min
Jan 21, 12:28 PM EST	River Flood Warning	FFC	DeKalb	24 hr
Jan 21, 12:28 PM EST	River Flood Warning	FFC	Gwinnett	24 hr
Jan 21, 12:42 PM EST	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Laurens, Pulaski, Twiggs	33 min
Jan 21, 12:43 PM EST	Tornado Warning	FFC	Twiggs, Wilkinson	32 min
Jan 21, 12:53 PM EST	Severe Thunderstorm Warning	FFC	Bleckley, Crisp, Dodge, Dooly, Laurens, Pulaski and 1 more	52 min
Jan 21, 12:57 PM EST	Tornado Warning	FFC	Bleckley, Laurens	33 min
Jan 21, 1:11 PM EST	Severe Thunderstorm Warning	FFC	Baldwin, Hancock, Washington, Wilkinson	49 min
Jan 21, 1:24 PM EST	Severe Thunderstorm Warning	FFC	Emanuel, Johnson, Laurens, Treutlen	51 min
Jan 21, 1:24 PM EST	Tornado Warning	FFC	Johnson, Laurens	36 min
Jan 21, 1:27 PM EST	Tornado Warning	FFC	Baldwin, Hancock, Washington	34 min
Jan 21, 1:31 PM EST	Severe Thunderstorm Warning	FFC	Emanuel, Laurens, Montgomery, Telfair, Toombs, Treutlen and 1 more	44 min
Jan 21, 1:32 PM EST	Severe Thunderstorm Warning	FFC	Jefferson, Washington	43 min
Jan 21, 1:41 PM EST	Tornado Warning	FFC	Jefferson, Johnson	34 min
Jan 21, 2:12 PM EST	Severe Thunderstorm Warning	FFC	Emanuel, Montgomery, Telfair, Toombs, Treutlen, Wheeler	33 min
Jan 21, 2:14 PM EST	Severe Thunderstorm Warning	FFC	Jefferson	31 min
Jan 21, 2:26 PM EST	River Flood Warning	FFC	DeKalb	24 hr
Jan 21, 3:46 PM EST	River Flood Warning	FFC	Gwinnett	24 hr
Jan 21, 3:46 PM EST	River Flood Warning	FFC	Forsyth, Fulton	64 hr
Jan 21, 5:39 PM EST	River Flood Warning	FFC	Gwinnett, Walton	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.