Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 313, NWS Atlanta, GA

August 17, 2018Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 17, 2018, 8:05 PM EDT for Dade County, Walker County, Georgia. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 17, 2018, 8:05 PM EDT (00:05 UTC)
Expired
Aug 17, 2018, 8:45 PM EDT
In force
40 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 63 km from the middle of the area, began a volume at 00:07 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.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.1 hours before the alert went out and 176 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, Nashville Metro, TN at 00:00Z on 2018-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 152 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2018-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.193958Sfc1 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
152 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1268 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

839 
WUUS52 KFFC 180005
SVRFFC
GAC083-295-180045-
/O.NEW.KFFC.SV.W.0313.180818T0005Z-180818T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
805 PM EDT FRI AUG 17 2018

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northwestern Walker County in northwestern Georgia...
  Dade County in northwestern Georgia...

* Until 845 PM EDT.

* At 804 PM EDT, a severe thunderstorm was located southwest of 
  Cole City, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Trenton, Chickamauga, Lookout Mountain, Cole City, Wildwood, 
  Fairview, Stephensville, Chattanooga Valley, New England, 
  Morganville, Cloudland Canyon State Park, Hooker and Lakeview.

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 3487 8527 3477 8556 3498 8560 3498 8526
TIME...MOT...LOC 0004Z 248DEG 24KT 3491 8563 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 8:24 PM EDTSpecial Weather StatementFFCChattooga, Walker51 min
Aug 17, 8:39 PM EDTSpecial Weather StatementFFCCatoosa, Dade36 min
Aug 17, 8:47 PM EDTSpecial Weather StatementFFCButts, Jasper, Monroe43 min
Aug 17, 9:12 PM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Floyd, Walker, Whitfield48 min
Aug 17, 9:21 PM EDTSevere Thunderstorm WarningFFCCatoosa, Walker, Whitfield39 min
Aug 17, 9:26 PM EDTSpecial Weather StatementFFCGreene, Jasper, Morgan, Putnam49 min
Aug 17, 9:48 PM EDTSpecial Weather StatementFFCFloyd, Gordon, Murray, Whitfield42 min
Aug 18, 2:37 PM EDTSpecial Weather StatementFFCStewart, Webster38 min
Aug 18, 3:25 PM EDTSpecial Weather StatementFFCBibb, Houston, Jones, Monroe, Peach50 min
Aug 18, 3:29 PM EDTSpecial Weather StatementFFCCrisp, Dooly, Sumter, Webster46 min
Aug 18, 3:54 PM EDTSpecial Weather StatementFFCDeKalb, Fulton, Gwinnett51 min
Aug 18, 4:08 PM EDTSpecial Weather StatementFFCCrisp, Dodge, Dooly, Montgomery, Pulaski, Telfair and 2 more37 min
Aug 18, 4:25 PM EDTSpecial Weather StatementFFCBarrow, Clayton, DeKalb, Gwinnett, Jackson, Rockdale and 1 more50 min
Aug 18, 4:40 PM EDTSpecial Weather StatementFFCBaldwin, Putnam50 min
Aug 18, 4:51 PM EDTSpecial Weather StatementFFCTreutlen39 min
Aug 18, 4:53 PM EDTSpecial Weather StatementFFCCoweta, Heard, Troup52 min
Aug 18, 5:11 PM EDTSpecial Weather StatementFFCBarrow, Walton49 min
Aug 18, 5:17 PM EDTSpecial Weather StatementFFCClayton, Fayette, Henry, Newton, Rockdale43 min
Aug 18, 5:26 PM EDTSpecial Weather StatementFFCEmanuel49 min
Aug 18, 5:52 PM EDTSpecial Weather StatementFFCMorgan, Newton, Oconee38 min
Aug 18, 6:05 PM EDTSevere Thunderstorm WarningFFCJasper, Morgan, Newton, Walton40 min
Aug 18, 7:41 PM EDTSpecial Weather StatementFFCBanks, Hall49 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.