Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 24, NWS Atlanta, GA

January 21, 20176 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 21, 2017, 2:12 PM EST for 6 counties in Georgia. It was in force for 33 min. 2 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, 2:12 PM EST (19:12 UTC)
Expired: Jan 21, 2017, 2:45 PM EST
In force: 33 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Robins AFB radar (KJGX), 98 km from the middle of the area, began a volume at 19:12 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, 2:15 PM EST	TSTM WND DMG	4 Se Jordan, GA	TREE DOWN ON ST. PAUL CHURCH RD.
Jan 21, 2:29 PM EST	TSTM WND DMG	1 N Toombs Central, GA	A TREE WAS BLOWN DOWN ON HIGHWAY 1 NEAR TODDS FISH FARM.

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

Jacksonville, FL (KJAX), launched 12:00Z, 7.2 hours before the alert went out and 208 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: 322 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

942 
WUUS52 KFFC 211912
SVRFFC
GAC107-209-271-279-283-309-211945-
/O.NEW.KFFC.SV.W.0024.170121T1912Z-170121T1945Z/

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

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Toombs County in southeastern Georgia...
  Emanuel County in east central Georgia...
  Southeastern Telfair County in central Georgia...
  Eastern Treutlen County in east central Georgia...
  Central Wheeler County in central Georgia...
  Montgomery County in central Georgia...

* Until 245 PM EST

* At 211 PM EST, severe thunderstorms extended from Herndon to near 
  Garfield to near Oak Park to near Uvalda to near Horse Creek, 
  moving east at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Swainsboro, Lyons, Mount Vernon, Vidalia, Twin City, Lumber City,
  Glenwood, Uvalda, Stillmore, Oak Park, Ailey, Scotland, Higgston,
  Garfield, Santa Claus, Summertown, Alston, Nunez, Jacksonville and
  Tarrytown.

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,
southeastern and east central Georgia.

LAT...LON 3180 8307 3234 8257 3263 8241 3279 8226
      3282 8215 3281 8215 3266 8208 3260 8200
      3254 8203 3256 8208 3252 8215 3235 8225
      3217 8218 3191 8223 3197 8243 3196 8257
      3192 8263 3192 8268 3178 8286 3178 8300
TIME...MOT...LOC 1911Z 255DEG 49KT 3285 8213 3268 8212 3239 8228 3205
8258 3183 8279

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
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, 1:05 PM EST	Severe Thunderstorm Warning	FFC	Johnson, Laurens, Washington, Wilkinson	40 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, 2:14 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.