Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 486, NWS Atlanta, GA

September 25, 2011Emanuel County, Jefferson County, Johnson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 25, 2011, 2:24 PM EDT for Emanuel County, Jefferson County, Johnson County, Georgia. It was in force for 35 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 25, 2011, 2:24 PM EDT (18:24 UTC)
Expired: Sep 25, 2011, 2:59 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Emanuel County, GA, Jefferson County, GA, Johnson County, GA

The radar

The Robins AFB radar (KJGX), 100 km from the middle of the area, began a volume at 18:24 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, 6.4 hours before the alert went out and 214 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1541 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

714 
WUUS52 KFFC 251824
SVRFFC
GAC107-163-167-251915-
/O.NEW.KFFC.SV.W.0486.110925T1824Z-110925T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
224 PM EDT SUN SEP 25 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL EMANUEL COUNTY IN EAST CENTRAL GEORGIA
  SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL GEORGIA
  NORTHEASTERN JOHNSON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 315 PM EDT

* AT 220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED 12 MILES
  SOUTHWEST OF WADLEY...MOVING NORTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BLUNDALE...THREE POINTS...COLEMANS LAKE AND MOXLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT 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.

&&

LAT...LON 3281 8215 3267 8252 3275 8258 3301 8236
      3292 8227 3284 8231 3283 8226 3281 8222
      3282 8216
TIME...MOT...LOC 1824Z 227DEG 12KT 3273 8250

$$

1 follow-up statement

291 
WWUS52 KFFC 251859
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
259 PM EDT SUN SEP 25 2011

GAC107-163-167-251910-
/O.CAN.KFFC.SV.W.0486.000000T0000Z-110925T1915Z/
JOHNSON GA-EMANUEL GA-JEFFERSON GA-
259 PM EDT SUN SEP 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JEFFERSON...NORTH
CENTRAL EMANUEL AND NORTHEASTERN JOHNSON COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE 
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY 
HEAVY RAIN...AND SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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.

LAT...LON 3281 8215 3267 8252 3275 8258 3301 8236
      3292 8227 3284 8231 3283 8226 3281 8222
      3282 8216
TIME...MOT...LOC 1900Z 227DEG 12KT 3281 8240

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 25, 12:27 PM EDT	Special Weather Statement	FFC	Wilkes	33 min
Sep 25, 12:28 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Oglethorpe, Taliaferro, Wilkes	47 min
Sep 25, 1:11 PM EDT	Severe Thunderstorm Warning	FFC	Wilkes	49 min
Sep 25, 1:17 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	28 min
Sep 25, 1:51 PM EDT	Special Weather Statement	FFC	Emanuel	39 min
Sep 25, 2:07 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	38 min
Sep 25, 2:08 PM EDT	Special Weather Statement	FFC	Emanuel	37 min
Sep 25, 2:55 PM EDT	Special Weather Statement	FFC	Jefferson	50 min
Sep 25, 3:13 PM EDT	Special Weather Statement	FFC	Jefferson, Johnson, Telfair, Treutlen, Wheeler	32 min
Sep 25, 3:32 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Warren	21 min
Sep 25, 3:42 PM EDT	Special Weather Statement	FFC	Jefferson, Johnson	48 min
Sep 25, 4:16 PM EDT	Special Weather Statement	FFC	Johnson	29 min
Sep 25, 4:33 PM EDT	Special Weather Statement	FFC	Washington	27 min
Sep 25, 4:37 PM EDT	Special Weather Statement	FFC	Greene	23 min
Sep 25, 5:00 PM EDT	Special Weather Statement	FFC	Taliaferro	30 min
Sep 25, 5:18 PM EDT	Special Weather Statement	FFC	Greene	27 min
Sep 25, 5:35 PM EDT	Special Weather Statement	FFC	Toombs	25 min
Sep 25, 5:46 PM EDT	Special Weather Statement	FFC	Greene, Putnam	29 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011 Every severe thunderstorm warning in 2011

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.