Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 159, NWS Atlanta, GA

April 15, 2011Fannin County, Gilmer County, Murray County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2011, 6:41 PM EDT for Fannin County, Gilmer County, Murray County, Georgia. It was in force for 49 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: Apr 15, 2011, 6:41 PM EDT (22:41 UTC)
Expired: Apr 15, 2011, 7:30 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Fannin County, GA, Gilmer County, GA, Murray County, GA

The radar

The Northeast Alabama radar (KHTX), 156 km from the middle of the area, began a volume at 22:42 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

Time	Report	Where	Remark
Apr 15, 7:00 PM EDT	TSTM WND DMG	Chatsworth, GA	SEVERAL TREES DOWN.

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 15, 5:46 PM EDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.7 hours before the alert went out and 171 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: 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.

754 
WUUS52 KFFC 152241
SVRFFC
GAC111-123-213-152330-
/O.NEW.KFFC.SV.W.0159.110415T2241Z-110415T2330Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FANNIN COUNTY IN NORTH CENTRAL GEORGIA
  NORTHWESTERN GILMER COUNTY IN NORTH CENTRAL GEORGIA
  CENTRAL MURRAY COUNTY IN NORTHWEST GEORGIA

* UNTIL 730 PM EDT

* AT 640 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 NEAR
  CHATSWORTH...MOVING NORTHEAST AT 45 MPH.

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

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 3495 8418 3492 8414 3470 8474 3481 8479
      3500 8448 3499 8413
TIME...MOT...LOC 2242Z 240DEG 37KT 3478 8471

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:12 AM EDT	Wind Advisory	FFC	Bartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 18 more	16 hr
Apr 15, 4:54 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gordon, Murray, Pickens	51 min
Apr 15, 5:14 PM EDT	Tornado Warning	FFC	Gilmer, Gordon, Pickens	46 min
Apr 15, 5:52 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Pickens	23 min
Apr 15, 6:14 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Lumpkin, Union	46 min
Apr 15, 6:20 PM EDT	Severe Thunderstorm Warning	FFC	Gordon, Murray, Whitfield	25 min
Apr 15, 6:29 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	46 min
Apr 15, 6:35 PM EDT	Severe Thunderstorm Warning	FFC	Towns	40 min
Apr 15, 6:38 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Gordon	52 min
Apr 15, 6:44 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Fulton, Paulding, Polk	46 min
Apr 15, 6:52 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Paulding	23 min
Apr 15, 7:07 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Troup	38 min
Apr 15, 7:11 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Fulton	34 min
Apr 15, 7:22 PM EDT	Tornado Warning	FFC	Harris, Muscogee	38 min
Apr 15, 7:43 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Cobb, Fulton	47 min
Apr 15, 7:51 PM EDT	Tornado Warning	FFC	Harris, Meriwether, Talbot	39 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; radar from the NEXRAD Level II archive.