Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 22, NWS Atlanta, GA

March 20, 20184 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 20, 2018, 12:27 AM EDT for 4 counties in Georgia. It was in force for 48 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: Mar 20, 2018, 12:27 AM EDT (04:27 UTC)
Expired: Mar 20, 2018, 1:15 AM EDT
In force: 48 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Greene County, GA, Jasper County, GA, Morgan County, GA, Putnam County, GA

The radar

The Robins AFB radar (KJGX), 68 km from the middle of the area, began a volume at 04:27 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
Mar 20, 12:36 AM EDT	TSTM WND DMG	5 Nne Willard, GA	TWO TREES WERE BLOWN DOWN NEAR THE INTERSECTION OF GODFREY RD AND GLADES RD.
Mar 20, 1:10 AM EDT	TSTM WND DMG	3 E Flat Rock, GA	A TREE WAS BLOWN DOWN NEAR THE INTERSECTION OF FOREST HILL DRIVE AND TWISTING HILL ROAD.

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
Mar 19, 9:08 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 4.5 hours before the alert went out and 114 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: 184 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 630 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

916 
WUUS52 KFFC 200427
SVRFFC
GAC133-159-211-237-200515-
/O.NEW.KFFC.SV.W.0022.180320T0427Z-180320T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1227 AM EDT TUE MAR 20 2018

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Morgan County in north central Georgia...
  Putnam County in central Georgia...
  Southern Greene County in east central Georgia...
  Southeastern Jasper County in central Georgia...

* Until 115 AM EDT

* At 1227 AM EDT, a severe thunderstorm was located over Shady Dale,
  or 9 miles northeast of Monticello, moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Eatonton, Madison, Greensboro, White Plains, Siloam, Shady Dale,
  Buckhead, Phoenix, Reynolds Plantation, Liberty, Veazey, Resseaus
  Crossroads, Central Georgia Experiment Stn, Plant Harlee Branch,
  Parks Mill, Swords, Harmony, Godfrey, Oconee Springs Park and
  Warfield.

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 400 AM EDT for central, north
central and east central Georgia.

LAT...LON 3336 8316 3334 8314 3331 8315 3328 8321
      3328 8323 3326 8323 3326 8325 3321 8326
      3319 8329 3318 8332 3317 8332 3318 8335
      3317 8338 3318 8339 3318 8353 3320 8371
      3359 8347 3355 8300 3349 8299
TIME...MOT...LOC 0427Z 271DEG 40KT 3343 8361 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 19, 9:22 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	38 min
Mar 19, 9:36 PM EDT	Severe Thunderstorm Warning	FFC	Floyd, Haralson, Polk	39 min
Mar 19, 9:43 PM EDT	Tornado Warning	FFC	Floyd, Polk	47 min
Mar 19, 9:59 PM EDT	Tornado Warning Tornado observedConsiderable damage threat	FFC	Haralson	46 min
Mar 19, 10:14 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Paulding, Polk	46 min
Mar 19, 10:32 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Haralson, Paulding	43 min
Mar 19, 10:51 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Fulton	24 min
Mar 19, 10:53 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Clayton, Douglas, Fayette, Fulton	52 min
Mar 19, 10:59 PM EDT	Flash Flood Warning	FFC	Carroll, Haralson, Paulding	6 hr
Mar 19, 10:59 PM EDT	Tornado Warning	FFC	Douglas, Fulton	31 min
Mar 19, 11:15 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, DeKalb, Fulton, Henry	30 min
Mar 19, 11:15 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Douglas, Fayette, Haralson, Heard	30 min
Mar 19, 11:31 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Clayton, DeKalb, Fayette, Henry, Newton and 3 more	29 min
Mar 19, 11:44 PM EDT	Special Weather Statement	FFC	Gwinnett, Walton	31 min
Mar 19, 11:47 PM EDT	Special Weather Statement	FFC	Coweta	28 min
Mar 19, 11:49 PM EDT	Special Weather Statement	FFC	Carroll	26 min
Mar 19, 11:58 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Fayette, Henry, Jasper, Morgan, Newton and 2 more	47 min
Mar 20, 12:00 AM EDT	Special Weather Statement	FFC	Morgan, Rockdale	30 min
Mar 20, 12:15 AM EDT	Special Weather Statement	FFC	Barrow, Clarke, Oconee, Walton	30 min
Mar 20, 12:20 AM EDT	Special Weather Statement	FFC	Coweta	40 min
Mar 20, 12:45 AM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe	30 min
Mar 20, 1:02 AM EDT	Special Weather Statement	FFC	Butts, Coweta, Heard, Jasper, Lamar, Meriwether and 5 more	43 min
Mar 20, 1:13 AM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Hancock, Jones, Putnam, Warren, Washington	47 min
Mar 20, 1:14 AM EDT	Severe Thunderstorm Warning	FFC	Hancock, Taliaferro, Warren	46 min
Mar 20, 1:24 AM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Lamar, Monroe, Pike and 1 more	51 min
Mar 20, 1:53 AM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Glascock, Hancock, Jefferson, Johnson, Washington	52 min
Mar 20, 1:58 AM EDT	Special Weather Statement	FFC	Meriwether, Pike, Troup	32 min
Mar 20, 2:35 AM EDT	Special Weather Statement	FFC	Harris, Jones, Lamar, Meriwether, Monroe, Pike and 2 more	25 min
Mar 20, 2:46 AM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Jefferson, Washington	44 min
Mar 20, 3:13 AM EDT	Special Weather Statement	FFC	Bibb, Upson	32 min
Mar 20, 3:27 AM EDT	Special Weather Statement	FFC	Jefferson	33 min
Mar 20, 3:57 AM EDT	Special Weather Statement	FFC	Twiggs, Wilkinson	33 min
Mar 20, 3:59 AM EDT	Special Weather Statement	FFC	Johnson	31 min
Mar 20, 4:27 AM EDT	Special Weather Statement	FFC	Emanuel	33 min
Mar 20, 5:55 AM EDT	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 37 more	4 hr
Mar 20, 3:32 PM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	28 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2018 Every severe thunderstorm warning in 2018

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.