Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 83, NWS Atlanta, GA

March 21, 201711 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 21, 2017, 9:22 PM EDT for 11 counties in Georgia. It was in force for 38 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 21, 2017, 9:22 PM EDT (01:22 UTC)
Expired: Mar 21, 2017, 10:00 PM EDT
In force: 38 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Barrow County, GA, Clarke County, GA, Greene County, GA, Jackson County, GA, Madison County, GA, Morgan County, GA, Oconee County, GA, Oglethorpe County, GA, Taliaferro County, GA, Walton County, GA, Wilkes County, GA

The radar

The Greer radar (KGSP), 126 km from the middle of the area, began a volume at 01:22 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 21, 9:40 PM EDT	TSTM WND DMG	Crawford, GA	MULTIPLLE TREES WERE REPORTED DOWN ALL ALONG LEXINGTON-CARLTON ROAD.
Mar 21, 9:54 PM EDT	TSTM WND DMG	1 Ssw Washington, GA	EMA REPORTED 8 TREES DOWN IN THE NORTHWEST PORTION OF THE COUNTY... NEAR RAYLE.

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 21, 3:33 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.4 hours before the alert went out and 153 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: 377 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2348 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

644 
WUUS52 KFFC 220122
SVRFFC
GAC013-059-133-157-195-211-219-221-265-297-317-220200-
/O.NEW.KFFC.SV.W.0083.170322T0122Z-170322T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
922 PM EDT TUE MAR 21 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Oconee County in northeastern Georgia...
  Southern Barrow County in north central Georgia...
  Northeastern Morgan County in north central Georgia...
  Clarke County in northeastern Georgia...
  Northeastern Walton County in north central Georgia...
  Northern Greene County in east central Georgia...
  Central Taliaferro County in east central Georgia...
  Southeastern Jackson County in northeastern Georgia...
  Wilkes County in east central Georgia...
  Oglethorpe County in northeastern Georgia...
  Madison County in northeastern Georgia...

* Until 1000 PM EDT

* At 921 PM EDT, severe thunderstorms were located extending from
  near Bowman to Arnoldsville to Good Hope, moving southeast at 60
  mph.

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

  SOURCE...Radar indicated, plus numerous reports of downed trees 
           and powerlines across north Georgia.

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

* Locations impacted include...
  Winder, Washington, Greensboro, Watkinsville, Danielsville,
  Lexington, Athens, Statham, Union Point, Comer, Winterville,
  Bogart, Crawford, North High Shoals, Bethlehem, Colbert, Tignall,
  Bostwick, Arnoldsville and Ila.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across much of north Georgia. 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.

&&

LAT...LON 3358 8271 3355 8325 3395 8381 3396 8379
      3404 8345 3425 8327 3424 8318 3427 8312
      3423 8308 3417 8310 3405 8299 3403 8293
      3401 8294 3397 8278 3398 8265 3386 8261
      3387 8257 3383 8260 3375 8255
TIME...MOT...LOC 0121Z 305DEG 51KT 3417 8308 3389 8324 3381 8360 

HAIL...0.75IN
WIND...60MPH
 
$$

1 follow-up statement

401 
WWUS52 KFFC 220142
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
942 PM EDT TUE MAR 21 2017

GAC013-059-157-211-297-220151-
/O.CAN.KFFC.SV.W.0083.000000T0000Z-170322T0200Z/
Barrow GA-Morgan GA-Clarke GA-Walton GA-Jackson GA-
942 PM EDT TUE MAR 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BARROW...NORTHEASTERN
MORGAN...CLARKE...NORTHEASTERN WALTON AND SOUTHEASTERN JACKSON
COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 PM EDT for 
east central Georgia.  A severe thunderstorm watch also remains in 
effect until 200 AM EDT for east central Georgia.

LAT...LON 3358 8271 3355 8325 3364 8337 3369 8340
      3374 8345 3382 8324 3414 8307 3405 8299
      3403 8293 3401 8294 3397 8278 3398 8265
      3386 8261 3387 8257 3383 8260 3375 8255
TIME...MOT...LOC 0141Z 328DEG 47KT 3397 8296 3365 8311 3352 8333 

$$

GAC133-195-219-221-265-317-220200-
/O.CON.KFFC.SV.W.0083.000000T0000Z-170322T0200Z/
Oconee GA-Greene GA-Taliaferro GA-Wilkes GA-Oglethorpe GA-Madison GA-
942 PM EDT TUE MAR 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR SOUTHEASTERN OCONEE...NORTHERN GREENE...CENTRAL TALIAFERRO...
WILKES...OGLETHORPE AND SOUTHEASTERN MADISON COUNTIES...

At 941 PM EDT, severe thunderstorms were located extending from Vesta
to Woodville to near Swords, moving southeast at 55 mph.

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

SOURCE...Radar indicated. 

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

Locations impacted include...
Washington, Greensboro, Lexington, Union Point, Comer, Crawford,
Tignall, Woodville, Carlton, Maxeys, Rayle, Stephens, Delhi,
Wrayswood, Hutchings, Greshamville, Newtown, Danburg, Penfield and
Lyneville.

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.

&&

LAT...LON 3358 8271 3355 8325 3364 8337 3369 8340
      3374 8345 3382 8324 3414 8307 3405 8299
      3403 8293 3401 8294 3397 8278 3398 8265
      3386 8261 3387 8257 3383 8260 3375 8255
TIME...MOT...LOC 0141Z 328DEG 47KT 3397 8296 3365 8311 3352 8333 

HAIL...0.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 8:00 PM EDT	Special Weather Statement	FFC	Walton	30 min
Mar 21, 8:02 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Jackson, Madison	31 min
Mar 21, 8:07 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Hall, Lumpkin, Pickens and 3 more	38 min
Mar 21, 8:08 PM EDT	Severe Thunderstorm Warning	FFC	Morgan, Oconee, Walton	52 min
Mar 21, 8:14 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Dawson, Floyd, Forsyth and 3 more	46 min
Mar 21, 8:19 PM EDT	Flash Flood Warning	FFC	Clarke, Greene, Oconee, Oglethorpe, Taliaferro, Wilkes	6 hr
Mar 21, 8:30 PM EDT	Special Weather Statement	FFC	Oglethorpe	45 min
Mar 21, 8:40 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Clayton, Cobb, DeKalb, Douglas, Forsyth and 5 more	50 min
Mar 21, 8:44 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Barrow, Forsyth, Gwinnett, Hall, Jackson and 2 more	46 min
Mar 21, 8:49 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Oconee, Oglethorpe	41 min
Mar 21, 9:20 PM EDT	Special Weather Statement	FFC	Butts, Clayton, Coweta, Fayette, Heard, Henry and 8 more	40 min
Mar 21, 9:45 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Greene, Hancock, Morgan, Oglethorpe, Putnam and 4 more	45 min
Mar 21, 9:53 PM EDT	Special Weather Statement	FFC	Baldwin, Butts, Harris, Jasper, Jones, Lamar and 7 more	52 min
Mar 21, 10:24 PM EDT	Special Weather Statement	FFC	Baldwin, Glascock, Hancock, Jefferson, Jones, Washington	36 min
Mar 21, 10:55 PM EDT	Special Weather Statement	FFC	Emanuel, Johnson, Wilkinson	50 min
Mar 21, 11:51 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	39 min

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.