Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 64, NWS Atlanta, GA

April 4, 2007Union County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 4, 2007, 1:31 AM EDT for Union County, Georgia. It was in force for 22 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 4, 2007, 1:31 AM EDT (05:31 UTC)
Expired: Apr 4, 2007, 1:53 AM EDT
In force: 22 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Union County, GA

The radar

The Knoxville radar (KMRX), 156 km from the middle of the area, began a volume at 05:34 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.

Issued	Product	Office	Lasted
Apr 3, 9:03 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.5 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: 1307 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KFFC 040531
SVRFFC
GAC291-040615-
/O.NEW.KFFC.SV.W.0064.070404T0531Z-070404T0615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
131 AM EDT WED APR 4 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL UNION COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 215 AM EDT

* AT 129 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR OWLTON...MOVING
  EAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BLAIRSVILLE AND DESOTO FALLS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM EDT
WEDNESDAY MORNING FOR NORTHERN GEORGIA.

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.

LAT...LON 3492 8412 3474 8413 3473 8379 3493 8379

$$

1 follow-up statement

000 
WWUS52 KFFC 040553
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
152 AM EDT WED APR 4 2007

GAC291-040602-
/O.CAN.KFFC.SV.W.0064.000000T0000Z-070404T0615Z/
UNION GA-
152 AM EDT WED APR 4 2007

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL UNION COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED AND MOVED OUT OF UNION COUNTY... 
THEREFORE IT IS NO LONGER EXPECTED TO PRODUCE SEVERE WEATHER. 
HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY HEAVY RAIN...AND 
SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM EDT
WEDNESDAY MORNING FOR NORTHERN GEORGIA.

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.

LAT...LON 3492 8412 3474 8413 3473 8379 3493 8379

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 12:08 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker, Whitfield	52 min
Apr 4, 12:16 AM EDT	Severe Thunderstorm Warning	FFC	Fannin	29 min
Apr 4, 12:35 AM EDT	Severe Thunderstorm Warning	FFC	Union	40 min
Apr 4, 12:54 AM EDT	Severe Thunderstorm Warning	FFC	Chattooga	36 min
Apr 4, 12:58 AM EDT	Severe Thunderstorm Warning	FFC	Walker	32 min
Apr 4, 1:02 AM EDT	Severe Thunderstorm Warning	FFC	Fannin	43 min
Apr 4, 1:29 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd	46 min
Apr 4, 1:57 AM EDT	Severe Thunderstorm Warning	FFC	Polk	33 min
Apr 4, 2:10 AM EDT	Fire Weather Watch	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	13 hr
Apr 4, 3:31 PM EDT	Red Flag Warning	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	26 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2007 Every severe thunderstorm warning in 2007

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.