Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 5, NWS Atlanta, GA

February 25, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 25, 2011, 2:36 AM EST for 4 counties in Georgia. It was in force for 54 min. 2 reports 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
Feb 25, 2011, 2:36 AM EST (07:36 UTC)
Expired
Feb 25, 2011, 3:30 AM EST
In force
54 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Carroll County, GA, Coweta County, GA, Heard County, GA, Troup County, GA

The radar

The Atlanta radar (KFFC), 32 km from the middle of the area, began a volume at 07:39 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
Feb 25, 3:02 AM ESTTSTM WND DMGCarrollton, GATWO TREES AND TWO POWER LINES DOWN.
Feb 25, 3:15 AM ESTTSTM WND DMGFranklin, GAHEARD COUNTY 911 RELAYED A REPORT OF A DOWNED TREE ON SOUTH RIVER ROAD IN FRANKLIN.

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

The watch it was issued in

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

IssuedProductOfficeLasted
Feb 24, 11:59 PM ESTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.6 hours before the alert went out and 38 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 00:00Z on 2011-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 00:00Z on 2011-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 square meters per square second.1939587897Sfc1 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
2 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1511 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
274 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.

557 
WUUS52 KFFC 250736
SVRFFC
GAC045-077-149-285-250830-
/O.NEW.KFFC.SV.W.0005.110225T0736Z-110225T0830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
236 AM EST FRI FEB 25 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CARROLL COUNTY IN NORTHWEST GEORGIA
  WESTERN COWETA COUNTY IN WEST CENTRAL GEORGIA
  HEARD COUNTY IN WEST CENTRAL GEORGIA
  TROUP COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 330 AM EST

* AT 231 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  15 MILES WEST OF BOWDON TO 33 MILES WEST OF EPHESUS TO 55 MILES
  WEST OF WEST POINT...MOVING EAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ROOPVILLE...CARROLLTON...CENTRALHATCHEE...WHITESBURG...FRANKLIN...
  CORINTH...HOGANSVILLE...LAGRANGE AND GRANTVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM EST FRIDAY
MORNING FOR NORTHERN GEORGIA.

&&

LAT...LON 3359 8490 3357 8489 3358 8482 3352 8482
      3352 8483 3351 8482 3322 8482 3321 8484
      3319 8484 3318 8486 3287 8485 3287 8519
      3357 8533
TIME...MOT...LOC 0736Z 271DEG 45KT 3350 8544 3324 8572
          3301 8604

$$
1 follow-up statement
749 
WWUS52 KFFC 250812
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
312 AM EST FRI FEB 25 2011

GAC045-077-149-285-250830-
/O.CON.KFFC.SV.W.0005.000000T0000Z-110225T0830Z/
TROUP GA-HEARD GA-COWETA GA-CARROLL GA-
312 AM EST FRI FEB 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EST
FOR SOUTHERN CARROLL...WESTERN COWETA...HEARD AND TROUP COUNTIES...

AT 310 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF 
PRODUCING DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED 
ALONG A LINE EXTENDING FROM NEAR CLEM TO WARESVILLE TO 20 MILES WEST 
OF STATE LINE PARK...AND MOVING EAST AT 45 MPH.

THE LINE OF STORMS WAS SHOWING A SLIGHT WEAKENING TREND AND IS 
SLOWING DOWN. THEREFORE... THE WARNING MAY BE EXTENDED IF THE STORMS 
REMAINS STRONG ENOUGH. IF THE WEAKENING TREND CONTINUES...A WEATHER 
ADVISORY WILL BE POSTED FOR THE AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM EST FRIDAY
MORNING FOR NORTHERN GEORGIA.

&&

LAT...LON 3359 8490 3357 8489 3358 8482 3352 8482
      3352 8483 3351 8482 3322 8482 3321 8484
      3319 8484 3318 8486 3287 8485 3287 8519
      3357 8533
TIME...MOT...LOC 0810Z 271DEG 45KT 3349 8493 3323 8521
          3300 8553

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 25, 1:12 AM ESTSevere Thunderstorm WarningFFCCatoosa, Chattooga, Dade, Floyd, Walker63 min
Feb 25, 1:48 AM ESTSevere Thunderstorm WarningFFCBartow, Floyd, Gordon, Murray, Whitfield57 min
Feb 25, 1:51 AM ESTSevere Thunderstorm WarningFFCCarroll, Douglas, Haralson, Paulding, Polk54 min
Feb 25, 2:25 AM ESTSevere Thunderstorm WarningFFCCherokee, Fannin, Gilmer, Pickens54 min
Feb 25, 2:43 AM ESTSevere Thunderstorm WarningFFCCarroll, Cobb, Douglas, Fulton, Hall62 min
Feb 25, 2:48 AM ESTSevere Thunderstorm WarningFFCCarroll, Haralson, Paulding27 min
Feb 25, 3:19 AM ESTWind AdvisoryFFCBaldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more13 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.