Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 1, NWS Atlanta, GA

January 2, 2017Johnson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jan 2, 2017, 2:52 PM EST for Johnson County, Georgia. It was in force for 23 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
Jan 2, 2017, 2:52 PM EST (19:52 UTC)
Expired
Jan 2, 2017, 3:15 PM EST
In force
23 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

County Johnson County, GA

The radar

The Robins AFB radar (KJGX), 64 km from the middle of the area, began a volume at 19:55 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.9 hours before the alert went out and 189 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 2017-01-02Temperature 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°0°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 2017-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.19395878Sfc1 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
845 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

926 
WUUS52 KFFC 021952
SVRFFC
GAC167-022015-
/O.NEW.KFFC.SV.W.0001.170102T1952Z-170102T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
252 PM EST MON JAN 2 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Central Johnson County in east central Georgia...

* Until 315 PM EST

* At 251 PM EST, a severe thunderstorm was located over Lovett, or 7
  miles south of Wrightsville, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and tornado possible. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Wrightsville and Spann. 

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 3259 8263 3259 8265 3261 8267 3262 8269
      3263 8270 3266 8279 3274 8272 3266 8255
TIME...MOT...LOC 1951Z 209DEG 18KT 3263 8273 

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

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 1, 10:21 PM ESTSpecial Weather StatementFFCMacon, Schley, Sumter39 min
Jan 1, 10:44 PM ESTSpecial Weather StatementFFCSumter46 min
Jan 1, 11:28 PM ESTSpecial Weather StatementFFCMacon32 min
Jan 1, 11:37 PM ESTSpecial Weather StatementFFCBibb23 min
Jan 2, 12:11 AM ESTSpecial Weather StatementFFCHouston, Peach34 min
Jan 2, 1:07 AM ESTSpecial Weather StatementFFCChattahoochee, Stewart23 min
Jan 2, 3:00 AM ESTSpecial Weather StatementFFCTwiggs30 min
Jan 2, 3:31 AM ESTSpecial Weather StatementFFCTwiggs29 min
Jan 2, 4:40 AM ESTFlood WatchFFCBaldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 38 more26 hr
Jan 2, 1:39 PM ESTSpecial Weather StatementFFCLaurens51 min
Jan 2, 1:51 PM ESTTornado WarningFFCLaurens39 min
Jan 2, 2:29 PM ESTTornado WarningFFCLaurens29 min
Jan 2, 3:17 PM ESTSpecial Weather StatementFFCEmanuel28 min
Jan 2, 3:45 PM ESTSpecial Weather StatementFFCEmanuel30 min
Jan 2, 5:31 PM ESTSpecial Weather StatementFFCStewart, Webster29 min
Jan 2, 5:37 PM ESTTornado Warning Tornado observedFFCStewart, Webster38 min
Jan 2, 6:06 PM ESTSevere Thunderstorm WarningFFCChattahoochee, Marion, Muscogee39 min
Jan 2, 6:14 PM ESTSevere Thunderstorm WarningFFCMarion, Schley, Sumter, Webster31 min
Jan 2, 6:44 PM ESTSpecial Weather StatementFFCSchley31 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.