Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 210, NWS Atlanta, GA

April 27, 2011Chattooga County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 27, 2011, 7:20 PM EDT for Chattooga County, Dade County, Walker County, Georgia. It was in force for 55 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: Apr 27, 2011, 7:20 PM EDT (23:20 UTC)
Expired: Apr 27, 2011, 8:15 PM EDT
In force: 55 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Chattooga County, GA, Dade County, GA, Walker County, GA

What was reported inside it

Time	Report	Where	Remark
Apr 27, 7:50 PM EDT	TORNADO 1	Rising Fawn, GA	NWS STORM SURVEY DETERMINED AN EF1 TORNADO TRACKED ACROSS DADE COUNTY FROM NEAR FOX MOUNTAIN TO RISING FAWN. PATH LENGTH WAS 3 MILES AND WIDTH WAS 100 YARDS.
Apr 27, 8:06 PM EDT	HAIL 1	2 S Trenton, GA	TRAINED SPOTTER REPORTED QUARTER-SIZED HAIL OUTSIDE OF TRENTON.

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.

Issued	Product	Office	Lasted
Apr 27, 2:42 PM EDT	Tornado Watch PDS	SPC	8 hr
Apr 27, 6:52 PM EDT	Tornado Watch PDS	SPC	9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.3 hours before the alert went out and 175 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: 748 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 460 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

694 
WUUS52 KFFC 272320
SVRFFC
GAC055-083-295-280015-
/O.NEW.KFFC.SV.W.0210.110427T2320Z-110428T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
720 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CHATTOOGA COUNTY IN NORTHWEST GEORGIA
  SOUTHERN DADE COUNTY IN NORTHWEST GEORGIA
  WESTERN WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 815 PM EDT

* AT 719 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DESTRUCTIVE WINDS UP TO 70 MPH.  THIS STORM WAS LOCATED 36 MILES
  WEST OF TRION...MOVING NORTHEAST AT 80 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LAFAYETTE AND CHICKAMAUGA.

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 200 AM EDT THURSDAY MORNING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3454 8527 3448 8551 3478 8558 3482 8558
      3499 8530 3499 8527 3499 8526
TIME...MOT...LOC 2320Z 235DEG 71KT 3448 8592

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 8:04 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd, Haralson, Polk	56 min
Apr 27, 8:16 AM EDT	Tornado Warning	FFC	Catoosa, Chattooga, Dade, Walker, Whitfield	44 min
Apr 27, 8:25 AM EDT	Tornado Warning	FFC	Dade, Walker	35 min
Apr 27, 8:28 AM EDT	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Heard	32 min
Apr 27, 8:35 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Gilmer, Gordon, Murray and 5 more	55 min
Apr 27, 8:42 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Murray, Whitfield	48 min
Apr 27, 8:51 AM EDT	Severe Thunderstorm Warning	FFC	Clayton, Coweta, Douglas, Fayette, Fulton	29 min
Apr 27, 8:54 AM EDT	Tornado Warning	FFC	Gilmer, Gordon, Murray, Whitfield	51 min
Apr 27, 9:02 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	16 min
Apr 27, 9:26 AM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray	39 min
Apr 27, 1:59 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	61 min
Apr 27, 2:25 PM EDT	Tornado Warning	FFC	Dade, Walker	34 min
Apr 27, 2:37 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Whitfield	25 min
Apr 27, 5:07 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	38 min
Apr 27, 5:14 PM EDT	Tornado Warning	FFC	Dade, Walker	46 min
Apr 27, 5:51 PM EDT	Tornado Warning	FFC	Catoosa	24 min
Apr 27, 5:53 PM EDT	River Flood Warning	FFC	Dade	11 hr
Apr 27, 6:03 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker	27 min
Apr 27, 6:15 PM EDT	Severe Thunderstorm Warning	FFC	Dade	30 min
Apr 27, 7:32 PM EDT	Tornado Warning	FFC	Chattooga, Dade, Walker	43 min
Apr 27, 7:59 PM EDT	Tornado Warning	FFC	Catoosa, Walker, Whitfield	46 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.