Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 162, NWS Atlanta, GA

April 15, 2011Harris County, Troup County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2011, 7:07 PM EDT for Harris County, Troup County, Georgia. It was in force for 38 min. 6 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 15, 2011, 7:07 PM EDT (23:07 UTC)
Expired: Apr 15, 2011, 7:45 PM EDT
In force: 38 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Harris County, GA, Troup County, GA

The radar

The Atlanta radar (KFFC), 73 km from the middle of the area, began a volume at 23:07 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, 7:30 PM EDT	TSTM WND DMG	Hamilton, GA	HARRIS COUNTY 911 RELAYED A REPORT OF NUMEROUS TREES DOWN IN EASTERN HARRIS COUNTY. TREE DAMAGE STARTED NEAR HIGHWAY 185 EXIT 19 AND CONTINUED EAST.
Apr 15, 7:35 PM EDT	HAIL 1.75	Jones Crossroads, GA	HAIL BROKE WINDSHIELD OF CAR.
Apr 15, 7:42 PM EDT	TSTM WND DMG	Hamilton, GA	HARRIS COUNTY RELAYED A REPORT OF TREES DOWN ACROSS THE COUNTY.
Apr 15, 7:44 PM EDT	HAIL 2.75	Hamilton, GA
Apr 15, 7:50 PM EDT	TORNADO 0	5 Sse Hamilton, GA	A NWS STORM SURVEY TEAM DETERMINED THAT A BRIEF TORNADO TOUCHED DOWN 5 MILES SSE OF HAMILTON IN HARRIS COUNTY. THERE WERE ABOUT 10 TREES WITH CLIPPED CANOPIES ALONG WITH A DESTROYED GAZEBO AND STORAGE SHED. THE TORNADO HAD ESTIMATED WIND SPEEDS OF 75 MPH. THE
Apr 15, 7:55 PM EDT	HAIL 1.75	Hamilton, GA	TREES CRASHING 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, 11.1 hours before the alert went out and 78 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.

184 
WUUS52 KFFC 152307
SVRFFC
GAC145-285-152345-
/O.NEW.KFFC.SV.W.0162.110415T2307Z-110415T2345Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARRIS COUNTY IN WEST CENTRAL GEORGIA
  SOUTHERN TROUP COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 745 PM EDT

* AT 703 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED 18 MILES
  SOUTHWEST OF WEST POINT...MOVING NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HAMILTON AND PINE MOUNTAIN-CALLAWAY GARDENS.

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 3310 8494 3299 8486 3287 8486 3286 8478
      3272 8468 3261 8509 3267 8510 3269 8513
      3273 8512 3275 8515 3278 8514 3282 8518
      3285 8516 3286 8519 3290 8520
TIME...MOT...LOC 2307Z 238DEG 43KT 3268 8528

$$

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, 6:41 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray	49 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, 7:11 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.