Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 196, NWS Atlanta, GA

May 27, 20175 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 27, 2017, 10:47 PM EDT for 5 counties in Georgia. It was in force for 58 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: May 27, 2017, 10:47 PM EDT (02:47 UTC)
Expired: May 27, 2017, 11:45 PM EDT
In force: 58 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Catoosa County, GA, Dade County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 107 km from the middle of the area, began a volume at 02:49 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
May 27, 11:16 PM EDT	TSTM WND DMG	1 Sse Boynton, GA	REPORT OF 1 TREE DOWN NEAR THE INTERSECTION OF THREE NOTCH RD AND BUSTER RIDGE LANE
May 27, 11:30 PM EDT	TSTM WND DMG	2 Wnw Cohutta Springs, GA	REPORT OF A TREE BLOWN DOWN ON MANTOOTH RD SOUTH OF HALLS CHAPEL RD

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
May 27, 10:07 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.8 hours before the alert went out and 154 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: 930 J/kg
Mixed-layer CIN: -238 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

756 
WUUS52 KFFC 280247
SVRFFC
GAC047-083-213-295-313-280345-
/O.NEW.KFFC.SV.W.0196.170528T0247Z-170528T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1047 PM EDT SAT MAY 27 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Catoosa County in northwestern Georgia...
  Murray County in northwestern Georgia...
  Whitfield County in northwestern Georgia...
  Walker County in northwestern Georgia...
  Dade County in northwestern Georgia...

* Until 1145 PM EDT

* At 1044 PM EDT, severe thunderstorms extended from northwest of 
  Chattanooga Tennessee to north of Huntsville Alabama, moving 
  southeast at 70 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Dalton, Lafayette, Chatsworth, Ringgold, Trenton, Fort Oglethorpe,
  Rossville, Chickamauga, Varnell, Lookout Mountain, Eton, Tunnel
  Hill, Cohutta, Center Post, Crandall, Fairview, Beaverdale,
  Villanow, Chattanooga  Valley and Cloudland Canyon State Park.

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 3499 8462 3486 8462 3482 8458 3478 8464
      3473 8466 3458 8465 3461 8473 3462 8472
      3461 8486 3462 8491 3463 8491 3462 8493
      3462 8505 3464 8505 3459 8506 3459 8553
      3464 8552 3465 8554 3498 8560
TIME...MOT...LOC 0244Z 301DEG 61KT 3519 8548 3514 8572 3512 8617 3510
8674

HAIL...0.88IN
WIND...60MPH
 
$$

1 follow-up statement

866 
WWUS52 KFFC 280314
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
1114 PM EDT SAT MAY 27 2017

GAC047-083-213-295-313-280345-
/O.CON.KFFC.SV.W.0196.000000T0000Z-170528T0345Z/
Catoosa GA-Murray GA-Whitfield GA-Walker GA-Dade GA-
1114 PM EDT SAT MAY 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR CATOOSA...MURRAY...WHITFIELD...WALKER AND DADE COUNTIES...

At 1113 PM EDT, severe thunderstorms were located along a line 
extending from around Cohutta to Fort Oglethorpe and Cole City, 
moving southeast at 65 mph.

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

SOURCE...Radar indicated. 

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

Locations impacted include...
Dalton, Lafayette, Chatsworth, Ringgold, Trenton, Fort Oglethorpe,
Rossville, Chickamauga, Varnell, Lookout Mountain, Eton, Tunnel Hill,
Cohutta, Center Post, Crandall, Fairview, Beaverdale, Villanow,
Chattanooga  Valley and Cloudland Canyon State Park.

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 3499 8462 3486 8462 3482 8458 3478 8464
      3473 8466 3458 8465 3461 8473 3462 8472
      3461 8486 3462 8491 3463 8491 3462 8493
      3462 8505 3464 8505 3459 8506 3459 8553
      3464 8552 3465 8554 3498 8560
TIME...MOT...LOC 0313Z 297DEG 55KT 3498 8499 3494 8523 3492 8568 3490
8625

HAIL...0.88IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 11:25 PM EDT	Special Weather Statement	FFC	Fannin, Towns, Union	50 min
May 27, 11:40 PM EDT	Special Weather Statement	FFC	Chattooga, Dawson, Floyd, Gilmer, Gordon, Lumpkin and 2 more	50 min
May 28, 12:26 AM EDT	Special Weather Statement	FFC	Banks, Bartow, Chattooga, Cherokee, Dawson, Floyd and 6 more	49 min
May 28, 12:48 AM EDT	Special Weather Statement	FFC	Cobb, DeKalb, Douglas, Fulton, Gwinnett, Haralson and 2 more	42 min
May 28, 12:59 AM EDT	Special Weather Statement	FFC	Barrow, Jackson, Madison	46 min
May 28, 2:17 AM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette, Henry, Spalding	28 min
May 28, 2:54 AM EDT	Special Weather Statement	FFC	Chattooga	36 min
May 28, 3:02 AM EDT	Severe Thunderstorm Warning	FFC	Chattooga, Floyd	43 min
May 28, 3:42 AM EDT	Special Weather Statement	FFC	Walker	33 min
May 28, 4:16 AM EDT	Special Weather Statement	FFC	Chattooga, Walker	29 min
May 28, 4:34 AM EDT	Special Weather Statement	FFC	Floyd	26 min
May 28, 4:58 AM EDT	Severe Thunderstorm Warning	FFC	Floyd, Haralson, Polk	37 min
May 28, 5:17 AM EDT	Special Weather Statement	FFC	Cherokee	28 min
May 28, 5:24 AM EDT	Severe Thunderstorm Warning	FFC	Carroll, Cobb, Douglas, Paulding	51 min
May 28, 5:56 AM EDT	Special Weather Statement	FFC	Clayton	34 min
May 28, 6:00 AM EDT	Special Weather Statement	FFC	DeKalb, Fulton, Gwinnett	30 min
May 28, 6:19 AM EDT	Special Weather Statement	FFC	Clayton, DeKalb, Henry, Newton, Rockdale, Walton	26 min
May 28, 6:51 AM EDT	Special Weather Statement	FFC	Clarke, Morgan, Newton, Oconee, Walton	24 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.