Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 157, NWS Atlanta, GA

April 15, 2011Towns County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2011, 6:35 PM EDT for Towns 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
Apr 15, 2011, 6:35 PM EDT (22:35 UTC)
Expired
Apr 15, 2011, 7:15 PM EDT
In force
40 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

County Towns County, GA

The radar

The Greer radar (KGSP), 136 km from the middle of the area, began a volume at 22:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 15, 5:46 PM EDTTornado WatchSPC3 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.6 hours before the alert went out and 185 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 2011-04-15Temperature 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 2011-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1094 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
198 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.

704 
WUUS52 KFFC 152235
SVRFFC
GAC281-152315-
/O.NEW.KFFC.SV.W.0157.110415T2235Z-110415T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
635 PM EDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TOWNS COUNTY IN NORTHEAST GEORGIA

* UNTIL 715 PM EDT

* AT 630 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 13 MILES
  SOUTHWEST OF YOUNG HARRIS...MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HIAWASSEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SATURDAY MORNING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3499 8354 3495 8354 3494 8359 3491 8360
      3488 8365 3483 8365 3479 8376 3480 8378
      3483 8380 3490 8380 3491 8382 3490 8385
      3495 8392 3500 8383
TIME...MOT...LOC 2235Z 241DEG 27KT 3481 8396

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 4:12 AM EDTWind AdvisoryFFCBartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 18 more16 hr
Apr 15, 4:54 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Gordon, Murray, Pickens51 min
Apr 15, 5:14 PM EDTTornado WarningFFCGilmer, Gordon, Pickens46 min
Apr 15, 5:52 PM EDTSevere Thunderstorm WarningFFCDawson, Fannin, Gilmer, Pickens23 min
Apr 15, 6:14 PM EDTSevere Thunderstorm WarningFFCDawson, Fannin, Lumpkin, Union46 min
Apr 15, 6:20 PM EDTSevere Thunderstorm WarningFFCGordon, Murray, Whitfield25 min
Apr 15, 6:29 PM EDTSevere Thunderstorm WarningFFCCarroll46 min
Apr 15, 6:38 PM EDTSevere Thunderstorm WarningFFCBartow, Floyd, Gordon52 min
Apr 15, 6:41 PM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Murray49 min
Apr 15, 6:44 PM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Cobb, Fulton, Paulding, Polk46 min
Apr 15, 6:52 PM EDTSevere Thunderstorm WarningFFCCarroll, Douglas, Paulding23 min
Apr 15, 7:07 PM EDTSevere Thunderstorm WarningFFCHarris, Troup38 min
Apr 15, 7:11 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas, Fulton34 min
Apr 15, 7:22 PM EDTTornado WarningFFCHarris, Muscogee38 min
Apr 15, 7:43 PM EDTSevere Thunderstorm WarningFFCCherokee, Cobb, Fulton47 min
Apr 15, 7:51 PM EDTTornado WarningFFCHarris, Meriwether, Talbot39 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011Every 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.