Alert archive / Georgia / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 368, NWS Atlanta, GA

July 21, 2003Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 21, 2003, 6:19 PM EDT for Dade County, Walker County, Georgia. It was in force for 26 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
Jul 21, 2003, 6:19 PM EDT (22:19 UTC)
Expired
Jul 21, 2003, 6:45 PM EDT
In force
26 min
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

Counties Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 64 km from the middle of the area, began a volume at 22:18 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 21, 2:45 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 179 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 2003-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1499 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2003-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
1499 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
919 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
25 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.

969 
WUUS52 KFFC 212219
SVRATL
GAC083-295-212245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
615 PM EDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DADE COUNTY IN NORTHWEST GEORGIA
  WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 645 PM EDT

* AT 613 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF SEVERE THUNDERSTORMS PRODUCING WINDS UP TO
  60 MPH LOCATED FROM LOOKOUT MOUNTAIN...TO CEDAR GROVE...TO
  LOOKOUT...MOVING EAST AT 20 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...CHATTANOOGA
  VALLEY...CHICKAMAUGA...LINWOOD...LA FAYETTE...LOOKOUT 
MOUNTAIN...CEDAR
  GROVE...AND LOOKOUT.

THIS LINE OF THUNDERSTORMS HAS HAD A HISTORY OF PRODUCING WIND GUSTS 
TO 60 MPH WELL AHEAD OF THE MAIN RAIN AREA WITHIN THE THUNDERSTORMS 
AS IT MOVED ACROSS NORTHEAST ALABAMA. THESE WINDS COULD BLOW DOWN 
TREES AND POWER LINES. MOVE TO A SAFE PLACE NOW

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 3508 8537 3467 8555 3458 8551 3461 8517

$$

RAB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 5:52 PM EDTSevere Thunderstorm WarningFFCDade23 min
Jul 21, 5:57 PM EDTSevere Thunderstorm WarningFFCDade18 min
Jul 21, 5:57 PM EDTSevere Thunderstorm WarningFFCBanks, Hall48 min
Jul 21, 6:40 PM EDTSevere Thunderstorm WarningFFCJackson35 min
Jul 21, 7:09 PM EDTSevere Thunderstorm WarningFFCBanks21 min
Jul 21, 7:24 PM EDTSevere Thunderstorm WarningFFCWilkes36 min
Jul 21, 7:43 PM EDTSevere Thunderstorm WarningFFCEmanuel32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2003Every severe thunderstorm warning in 2003

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.