Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Atlanta, GA

September 22, 2017Jefferson County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 22, 2017, 3:08 PM EDT for Jefferson County, Georgia. It was in force for 37 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
Sep 22, 2017, 3:08 PM EDT (19:08 UTC)
Expired
Sep 22, 2017, 3:45 PM EDT
In force
37 min
Issued by
NWS Atlanta, GA
Wind
40

County Jefferson County, GA

The radar

The Robins AFB radar (KJGX), 100 km from the middle of the area, began a volume at 19:08 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, 7.1 hours before the alert went out and 204 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 2017-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 697 joules per kilogram.LCLLFCEL10008507005003002001001 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 2017-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
697 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1144 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

871 
WWUS82 KFFC 221908
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
308 PM EDT FRI SEP 22 2017
 
GAZ076-221945-
Jefferson GA-
308 PM EDT FRI SEP 22 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN JEFFERSON COUNTY UNTIL
345 PM EDT...

At 308 PM EDT...a strong thunderstorm was near Vidette, or 7 miles
northeast of Louisville...moving southwest at 10 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning 
           and heavy rain. 

  IMPACT...Expect minor damage to tree limbs and blowing around of 
           light...unsecured objects. Heavy rain may cause temporary 
           street flooding especially in poor drainage areas. 

Some locations in the path of this storm include
Louisville and Moxley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3288 8232 3295 8245 3303 8254 3314 8234
      3311 8228 3305 8229 3299 8228
TIME...MOT...LOC 1908Z 038DEG 7KT 3309 8233 

WIND...40MPH

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 8:11 PM EDTSpecial Weather StatementFFCCrisp, Dooly, Pulaski34 min
Sep 21, 9:12 PM EDTSpecial Weather StatementFFCDeKalb33 min
Sep 22, 2:34 PM EDTSpecial Weather StatementFFCLaurens26 min
Sep 22, 2:42 PM EDTSpecial Weather StatementFFCJohnson33 min
Sep 22, 3:16 PM EDTSpecial Weather StatementFFCBleckley29 min
Sep 22, 3:17 PM EDTSpecial Weather StatementFFCJohnson43 min
Sep 22, 3:28 PM EDTSpecial Weather StatementFFCEmanuel47 min
Sep 22, 3:48 PM EDTSpecial Weather StatementFFCBleckley42 min
Sep 22, 4:50 PM EDTSpecial Weather StatementFFCPulaski25 min
Sep 22, 4:51 PM EDTSpecial Weather StatementFFCPulaski24 min
Sep 22, 4:55 PM EDTSpecial Weather StatementFFCEmanuel, Treutlen35 min
Sep 22, 4:59 PM EDTSpecial Weather StatementFFCJones, Monroe31 min
Sep 22, 5:29 PM EDTSpecial Weather StatementFFCLamar, Monroe31 min
Sep 22, 5:43 PM EDTSevere Thunderstorm WarningFFCMeriwether, Pike, Upson47 min
Sep 22, 5:48 PM EDTSpecial Weather StatementFFCBibb27 min
Sep 22, 5:49 PM EDTSpecial Weather StatementFFCWilcox26 min
Sep 22, 6:01 PM EDTSevere Thunderstorm WarningFFCBibb, Twiggs29 min
Sep 22, 6:14 PM EDTSevere Thunderstorm WarningFFCTalbot, Upson31 min
Sep 22, 6:20 PM EDTSpecial Weather StatementFFCTelfair25 min
Sep 22, 6:28 PM EDTSevere Thunderstorm WarningFFCBibb, Crawford, Houston, Peach, Twiggs32 min
Sep 22, 6:32 PM EDTSpecial Weather StatementFFCMeriwether, Troup28 min
Sep 22, 6:39 PM EDTSpecial Weather StatementFFCTalbot36 min
Sep 22, 6:57 PM EDTSevere Thunderstorm WarningFFCCrawford, Macon, Peach, Taylor33 min
Sep 22, 7:34 PM EDTSevere Thunderstorm WarningFFCMacon, Taylor26 min

Nearby

Special Weather Statements in Georgia, 2017Every special weather statement 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.