Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 75, NWS Atlanta, GA

March 21, 20179 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 21, 2017, 7:48 PM EDT for 9 counties in Georgia. It was in force for 42 min. 5 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, 7:48 PM EDT (23:48 UTC)
Expired
Mar 21, 2017, 8:30 PM EDT
In force
42 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Bartow County, GA, Chattooga County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Murray County, GA, Pickens County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 23:48 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

TimeReportWhereRemark
Mar 21, 7:50 PM EDTTSTM WND DMGHunts Corner, GAROOF DAMAGE AND TREE SPLIT ALONG HUNTS GIN RD.
Mar 21, 8:00 PM EDTTSTM WND DMGJohn Graham Homes, GALARGE TREE DOWN ON GROUNDS OF NGHA THE HIGHRISE IN ROME
Mar 21, 8:04 PM EDTTSTM WND DMG1 Wsw Mount Berry, GATREE DOWN ON A HOUSE OFF ARMSTRONG AVE. TIME ESTIMATED FROM RADAR.
Mar 21, 8:04 PM EDTTSTM WND DMGCherokee Acres, GATREE DOWN ON A TRAILER. TIME ESTIMATED FROM RADAR.
Mar 21, 8:06 PM EDTTSTM WND GST 512 Nnw Adairsville, GATRAINED SPOTTERS REPORTED WIND GUSTS OF 51 MPH ON BOWDOIN LANE IN ADAIRSVILLE. ALSO REPORTED DAMAGE TO SHINGLES... SIDING... AND LIMBS

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.

IssuedProductOfficeLasted
Mar 21, 3:33 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.8 hours before the alert went out and 138 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2017-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2017-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1219 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

076 
WUUS52 KFFC 212348
SVRFFC
GAC015-055-111-115-123-129-213-227-313-220030-
/O.NEW.KFFC.SV.W.0075.170321T2348Z-170322T0030Z/

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

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Murray County in northwestern Georgia...
  Gilmer County in north central Georgia...
  Central Floyd County in northwestern Georgia...
  Eastern Whitfield County in northwestern Georgia...
  Gordon County in northwestern Georgia...
  Western Pickens County in north central Georgia...
  Chattooga County in northwestern Georgia...
  Northern Bartow County in northwestern Georgia...
  Northwestern Fannin County in north central Georgia...

* Until 830 PM EDT

* At 746 PM EDT, severe thunderstorms were located extending from
  near Gap Springs to near Chatsworth to Oostanaula to near
  Chattoogaville, moving east-southeast at 45 mph.

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

  SOURCE...Reports of trees and powerlines down have occurred in 
           Dade, Catoosa, and Whitfield counties. 

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

* Locations impacted include...
  Rome, Dalton, Calhoun, Summerville, Chatsworth, Jasper, Ellijay,
  Blue Ridge, Adairsville, Varnell, Eton, East Ellijay, Resaca,
  Plainville, Talking Rock, Shannon, Fairmount, Lyerly, Menlo and
  Ranger.

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 8432 3463 8433 3439 8454 3438 8458
      3441 8458 3441 8465 3436 8466 3422 8525
      3433 8547 3449 8550 3454 8517 3459 8513
      3459 8506 3468 8505 3478 8496 3499 8493
TIME...MOT...LOC 2346Z 285DEG 27KT 3504 8477 3474 8478 3450 8499 3437
8546

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
180 
WWUS52 KFFC 220024
SVSFFC

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

GAC015-055-111-115-123-129-213-227-313-220033-
/O.EXP.KFFC.SV.W.0075.000000T0000Z-170322T0030Z/
Murray GA-Gilmer GA-Floyd GA-Whitfield GA-Gordon GA-Pickens GA-
Chattooga GA-Bartow GA-Fannin GA-
824 PM EDT TUE MAR 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR MURRAY...GILMER...CENTRAL
FLOYD...EASTERN WHITFIELD...GORDON...WESTERN PICKENS...CHATTOOGA...
NORTHERN BARTOW AND NORTHWESTERN FANNIN COUNTIES WILL EXPIRE AT 830
PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.  However gusty winds
and heavy rain are still possible with these thunderstorms.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
north central and northwestern Georgia.

LAT...LON 3499 8432 3463 8433 3439 8454 3438 8458
      3441 8458 3441 8465 3436 8466 3422 8525
      3433 8547 3449 8550 3454 8517 3459 8513
      3459 8506 3468 8505 3478 8496 3499 8493
TIME...MOT...LOC 0023Z 285DEG 27KT 3497 8447 3467 8448 3443 8469 3430
8516

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 3:40 PM EDTSpecial Weather StatementFFCBanks50 min
Mar 21, 3:50 PM EDTSevere Thunderstorm WarningFFCBanks, Hall, White40 min
Mar 21, 4:08 PM EDTSpecial Weather StatementFFCLumpkin52 min
Mar 21, 4:23 PM EDTSpecial Weather StatementFFCChattooga37 min
Mar 21, 4:29 PM EDTSevere Thunderstorm WarningFFCHall, White46 min
Mar 21, 4:36 PM EDTSpecial Weather StatementFFCWhitfield39 min
Mar 21, 4:57 PM EDTSevere Thunderstorm WarningFFCMurray, Whitfield33 min
Mar 21, 4:58 PM EDTSpecial Weather StatementFFCUnion47 min
Mar 21, 5:04 PM EDTFlash Flood WarningFFCHall, White6 hr
Mar 21, 5:09 PM EDTSevere Thunderstorm WarningFFCFannin, Lumpkin, Union51 min
Mar 21, 5:13 PM EDTSevere Thunderstorm WarningFFCBanks, Hall, White47 min
Mar 21, 5:18 PM EDTSevere Thunderstorm WarningFFCDade, Walker18 min
Mar 21, 5:24 PM EDTSpecial Weather StatementFFCMurray36 min
Mar 21, 5:41 PM EDTSevere Thunderstorm WarningFFCLumpkin, White49 min
Mar 21, 5:44 PM EDTSpecial Weather StatementFFCDade31 min
Mar 21, 5:52 PM EDTSevere Thunderstorm WarningFFCFannin, Lumpkin, Union38 min
Mar 21, 5:59 PM EDTSevere Thunderstorm WarningFFCBanks46 min
Mar 21, 6:06 PM EDTFlash Flood WarningFFCDade, Walker6 hr
Mar 21, 6:06 PM EDTSevere Thunderstorm WarningFFCFannin24 min
Mar 21, 6:07 PM EDTSevere Thunderstorm WarningFFCDade, Walker23 min
Mar 21, 6:20 PM EDTFlash Flood WarningFFCLumpkin, Union, White6 hr
Mar 21, 6:27 PM EDTSpecial Weather StatementFFCJackson33 min
Mar 21, 6:28 PM EDTSpecial Weather StatementFFCWalker32 min
Mar 21, 6:28 PM EDTSevere Thunderstorm WarningFFCLumpkin, Union47 min
Mar 21, 6:31 PM EDTSpecial Weather StatementFFCWhite44 min
Mar 21, 6:33 PM EDTSevere Thunderstorm WarningFFCFannin42 min
Mar 21, 6:38 PM EDTSevere Thunderstorm WarningFFCCatoosa, Dade, Walker37 min
Mar 21, 6:53 PM EDTSevere Thunderstorm WarningFFCClarke, Jackson, Madison52 min
Mar 21, 6:56 PM EDTSpecial Weather StatementFFCBanks49 min
Mar 21, 7:08 PM EDTSevere Thunderstorm WarningFFCMadison37 min
Mar 21, 7:09 PM EDTSpecial Weather StatementFFCForsyth51 min
Mar 21, 7:11 PM EDTSevere Thunderstorm WarningFFCCatoosa, Chattooga, Dade, Floyd, Gordon, Walker and 1 more49 min
Mar 21, 7:13 PM EDTSpecial Weather StatementFFCJackson47 min
Mar 21, 7:16 PM EDTSevere Thunderstorm WarningFFCFannin, Union44 min
Mar 21, 7:17 PM EDTSpecial Weather StatementFFCWalton43 min
Mar 21, 7:21 PM EDTSevere Thunderstorm WarningFFCClarke, Madison, Oglethorpe24 min
Mar 21, 7:24 PM EDTSevere Thunderstorm WarningFFCBarrow, Jackson, Oconee36 min
Mar 21, 7:33 PM EDTSevere Thunderstorm WarningFFCBarrow, Gwinnett, Walton42 min
Mar 21, 7:35 PM EDTSpecial Weather StatementFFCBanks25 min
Mar 21, 7:37 PM EDTSpecial Weather StatementFFCGilmer, Murray23 min
Mar 21, 7:41 PM EDTSpecial Weather StatementFFCDawson34 min
Mar 21, 7:41 PM EDTSevere Thunderstorm WarningFFCGilmer, Murray34 min
Mar 21, 7:45 PM EDTSevere Thunderstorm WarningFFCClarke, Jackson, Madison, Oconee, Oglethorpe45 min
Mar 21, 7:48 PM EDTSpecial Weather StatementFFCLumpkin, White27 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017Every 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.