Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 331, NWS Atlanta, GA

September 21, 2017Dodge County, Telfair County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 21, 2017, 5:56 PM EDT for Dodge County, Telfair County, Georgia. It was in force for 34 min. 1 report 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
Sep 21, 2017, 5:56 PM EDT (21:56 UTC)
Expired
Sep 21, 2017, 6:30 PM EDT
In force
34 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dodge County, GA, Telfair County, GA

The radar

The Robins AFB radar (KJGX), 73 km from the middle of the area, began a volume at 21:58 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
Sep 21, 6:29 PM EDTTSTM WND DMGMilan, GATREE DOWN OFF HWY 280 IN MILAN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 200 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 2017-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 375 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 2017-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
375 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1335 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

916 
WUUS52 KFFC 212156
SVRFFC
GAC091-271-212230-
/O.NEW.KFFC.SV.W.0331.170921T2156Z-170921T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
556 PM EDT THU SEP 21 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Dodge County in central Georgia...
  Northwestern Telfair County in central Georgia...

* Until 630 PM EDT

* At 556 PM EDT, a severe thunderstorm was located over Helena, or
  over McRae, moving south at 10 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Milan, Chauncey, Jay Bird Springs and Achord. 

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 3207 8318 3218 8301 3215 8299 3216 8296
      3215 8292 3213 8294 3212 8291 3203 8296
      3198 8288 3192 8307
TIME...MOT...LOC 2156Z 019DEG 8KT 3208 8295 

HAIL...1.00IN
WIND...60MPH
 
$$
1 follow-up statement
071 
WWUS52 KFFC 212223
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
623 PM EDT THU SEP 21 2017

GAC091-271-212231-
/O.EXP.KFFC.SV.W.0331.000000T0000Z-170921T2230Z/
Dodge GA-Telfair GA-
623 PM EDT THU SEP 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DODGE AND
NORTHWESTERN TELFAIR COUNTIES WILL EXPIRE AT 630 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However frequent 
lightning strikes are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Peachtree City.

LAT...LON 3207 8318 3218 8301 3215 8299 3216 8296
      3215 8292 3213 8294 3212 8291 3203 8296
      3198 8288 3192 8307
TIME...MOT...LOC 2221Z 019DEG 8KT 3204 8297 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 4:43 PM EDTSpecial Weather StatementFFCMontgomery32 min
Sep 21, 4:56 PM EDTSpecial Weather StatementFFCBanks34 min
Sep 21, 5:16 PM EDTSpecial Weather StatementFFCMontgomery, Wheeler29 min
Sep 21, 5:27 PM EDTSpecial Weather StatementFFCLaurens33 min
Sep 21, 5:41 PM EDTSevere Thunderstorm WarningFFCTelfair, Wheeler34 min
Sep 21, 5:53 PM EDTSpecial Weather StatementFFCJohnson37 min
Sep 21, 5:57 PM EDTSpecial Weather StatementFFCDodge33 min
Sep 21, 6:09 PM EDTSpecial Weather StatementFFCDawson36 min
Sep 21, 6:12 PM EDTSpecial Weather StatementFFCJohnson33 min
Sep 21, 6:27 PM EDTSpecial Weather StatementFFCJohnson33 min
Sep 21, 6:40 PM EDTSevere Thunderstorm WarningFFCEmanuel, Johnson50 min
Sep 21, 6:42 PM EDTSpecial Weather StatementFFCPulaski33 min
Sep 21, 6:59 PM EDTSevere Thunderstorm WarningFFCPulaski, Wilcox31 min
Sep 21, 7:30 PM EDTSpecial Weather StatementFFCPulaski30 min
Sep 21, 7:36 PM EDTSpecial Weather StatementFFCWilkinson24 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.