Alert archive / Georgia / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 409, NWS Atlanta, GA

October 21, 2005Chattooga County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Oct 21, 2005, 4:18 PM EDT for Chattooga County, Georgia. It was in force for 36 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: Oct 21, 2005, 4:18 PM EDT (20:18 UTC)
Expired: Oct 21, 2005, 4:54 PM EDT
In force: 36 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Chattooga County, GA

The radar

The Northeast Alabama radar (KHTX), 89 km from the middle of the area, began a volume at 20:18 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
Oct 21, 4:30 PM EDT	HAIL 0.75	Lyerly, GA
Oct 21, 4:35 PM EDT	HAIL 0.88	4 Ne Lyerly, GA	JAMES H SLOOPY FLOYD STATE PARK

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 140 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: 2 J/kg
Mixed-layer CIN: -266 J/kg
Mixed-layer LCL: 1051 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 63 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.

000 
WUUS52 KFFC 212021
SVRFFC
GAC055-212100-
/O.NEW.KFFC.SV.W.0409.051021T2018Z-051021T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
418 PM EDT FRI OCT 21 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHATTOOGA COUNTY IN NORTHWEST GEORGIA

* UNTIL 500 PM EDT

* AT 414 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED HAIL.  THIS
  STORM WAS LOCATED 6 MILES SOUTHWEST OF CHATTOOGAVILLE...AND MOVING
  NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  JAMES H. FLOYD STATE PARK AND BERRYTON.

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 3442 8548 3427 8544 3444 8517 3455 8513

$$

2 follow-up statements

000 
WWUS52 KFFC 212038
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
438 PM EDT FRI OCT 21 2005

GAC055-212100-
/O.CON.KFFC.SV.W.0409.000000T0000Z-051021T2100Z/
CHATTOOGA GA-
438 PM EDT FRI OCT 21 2005

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHERN CHATTOOGA COUNTY...

AT 434 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED
HAIL.  THIS STORM WAS LOCATED NEAR JAMES H. FLOYD STATE PARK...OR
ABOUT NEAR SUMMERVILLE...MOVING NORTHEAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TIDINGS.

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 3442 8548 3427 8544 3444 8517 3455 8513

$$

000 
WWUS52 KFFC 212054
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
454 PM EDT FRI OCT 21 2005

GAC055-212104-
/O.CAN.KFFC.SV.W.0409.000000T0000Z-051021T2100Z/
CHATTOOGA GA-
454 PM EDT FRI OCT 21 2005

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHATTOOGA COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED OUT OF SOUTHERN CHATTOOGA  COUNTY
AND SEVERE WEATHER IS NO LONGER EXPECTED.

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 3442 8548 3427 8544 3444 8517 3455 8513

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 21, 4:48 PM EDT	Severe Thunderstorm Warning	FFC	Gordon	22 min
Oct 21, 4:49 PM EDT	Severe Thunderstorm Warning	FFC	Floyd	26 min
Oct 21, 4:54 PM EDT	Severe Thunderstorm Warning	FFC	Polk	36 min
Oct 21, 5:47 PM EDT	Severe Thunderstorm Warning	FFC	Paulding, Polk	38 min
Oct 21, 6:15 PM EDT	Severe Thunderstorm Warning	FFC	Cobb	30 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2005 Every severe thunderstorm warning in 2005

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.