Alert archive / Georgia / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 2, NWS Atlanta, GA

February 21, 2005Catoosa County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 21, 2005, 11:47 AM EST for Catoosa County, Walker County, Georgia. It was in force for 43 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
Feb 21, 2005, 11:47 AM EST (16:47 UTC)
Expired
Feb 21, 2005, 12:30 PM EST
In force
43 min
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

Counties Catoosa County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 74 km from the middle of the area, began a volume at 16:47 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.

IssuedProductOfficeLasted
Feb 21, 9:40 AM ESTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.8 hours before the alert went out and 178 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2005-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 88 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2005-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
88 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
553 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
177 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 211648
SVRFFC
GAC047-295-211730-
/O.NEW.KFFC.SV.W.0002.050221T1647Z-050221T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1147 AM EST MON FEB 21 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CATOOSA COUNTY IN NORTHWEST GEORGIA
  WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 1230 PM EST

* AT 1143 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DAMAGING WINDS UP TO 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM LOOKOUT MOUNTAIN TO 18 MILES
  WEST OF HIGH POINT...AND MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ROSSVILLE...RINGGOLD...LA FAYETTE...INDIAN SPRINGS...GRAYSVILLE...
  FORT OGLETHORPE...CHICKAMAUGA AND BOYNTON.

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 3499 8536 3460 8552 3459 8519 3499 8496

$$
1 follow-up statement
000 
WWUS52 KFFC 211726
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1225 PM EST MON FEB 21 2005

GAC047-295-211730-
/O.CON.KFFC.SV.W.0002.000000T0000Z-050221T1730Z/
WALKER-CATOOSA-
1225 PM EST MON FEB 21 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 1230 PM EST FOR
CATOOSA AND WALKER COUNTIES...

AT 1220 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM LOCATED NEAR NAOMI AND LA 
FAYETTE...MOVING SOUTHEAST AT 35 MPH.  THIS STORM HAS WEAKENED 
CONSIDERABLY IN THE PAST 30 MINUTES.  THE WARNING WILL BE ALLOWED OT 
EXPIRE AT 1230 PM.

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 3499 8536 3460 8552 3459 8519 3499 8496

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 12:01 PM ESTSevere Thunderstorm WarningFFCCobb, Paulding44 min
Feb 21, 12:32 PM ESTSevere Thunderstorm WarningFFCFannin, Gilmer28 min
Feb 21, 12:52 PM ESTSevere Thunderstorm WarningFFCCobb, Paulding23 min
Feb 21, 1:07 PM ESTSevere Thunderstorm WarningFFCGwinnett23 min
Feb 21, 1:15 PM ESTSevere Thunderstorm WarningFFCDeKalb, Fulton30 min
Feb 21, 1:28 PM ESTSevere Thunderstorm WarningFFCBarrow, Gwinnett, Walton47 min
Feb 21, 1:45 PM ESTSevere Thunderstorm WarningFFCClarke, Oconee30 min
Feb 21, 2:29 PM ESTSevere Thunderstorm WarningFFCOglethorpe, Wilkes46 min
Feb 21, 4:08 PM ESTSevere Thunderstorm WarningFFCMurray37 min
Feb 21, 4:19 PM ESTSevere Thunderstorm WarningFFCFannin, Gilmer41 min
Feb 21, 4:26 PM ESTSevere Thunderstorm WarningFFCChattooga, Walker49 min
Feb 21, 4:51 PM ESTSevere Thunderstorm WarningFFCUnion39 min
Feb 21, 4:58 PM ESTSevere Thunderstorm WarningFFCFloyd, Gordon47 min
Feb 21, 5:03 PM ESTSevere Thunderstorm WarningFFCLumpkin, Towns, White27 min
Feb 21, 5:11 PM ESTSevere Thunderstorm WarningFFCDawson, Pickens34 min
Feb 21, 5:15 PM ESTSevere Thunderstorm WarningFFCChattooga30 min
Feb 21, 5:20 PM ESTSevere Thunderstorm WarningFFCBartow40 min
Feb 21, 5:34 PM ESTSevere Thunderstorm WarningFFCFloyd41 min
Feb 21, 5:42 PM ESTSevere Thunderstorm WarningFFCCherokee48 min
Feb 21, 6:08 PM ESTSevere Thunderstorm WarningFFCForsyth, Fulton52 min
Feb 21, 6:14 PM ESTSevere Thunderstorm WarningFFCBartow, Paulding46 min
Feb 21, 6:28 PM ESTSevere Thunderstorm WarningFFCGwinnett, Hall32 min
Feb 21, 6:30 PM ESTSevere Thunderstorm WarningFFCCobb30 min
Feb 21, 6:34 PM ESTSevere Thunderstorm WarningFFCHancock41 min
Feb 21, 6:39 PM ESTSevere Thunderstorm WarningFFCBaldwin, Washington51 min
Feb 21, 6:42 PM ESTSevere Thunderstorm WarningFFCBarrow48 min
Feb 21, 6:53 PM ESTSevere Thunderstorm WarningFFCDeKalb, Gwinnett52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2005Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.