Alert archive / Georgia / Tornado Watches in 1998

Tornado Watch 306

May 7, 199826 counties in Alabama; 39 counties in Georgia; Tishomingo County, Mississippi

The Storm Prediction Center issued this tornado watch at May 7, 1998, 8:00 PM CDT for 26 counties in Alabama; 39 counties in Georgia; Tishomingo County, Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 7, 1998, 8:00 PM CDT (01:00 UTC)
Expired
May 8, 1998, 1:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 66 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Walker County, AL, Winston County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Butts County, GA, Carroll County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Heard County, GA, Henry County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Meriwether County, GA, Monroe County, GA, Morgan County, GA, Newton County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Spalding County, GA, Troup County, GA, Walton County, GA, Tishomingo County, MS

Warnings issued inside it

53 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 7, 8:00 PM CDTTornado WarningBMXCullman, Winston65 min
May 7, 8:06 PM CDTTornado WarningBMXMadison49 min
May 7, 8:08 PM CDTSevere Thunderstorm WarningBMXMorgan62 min
May 7, 8:11 PM CDTTornado WarningBMXDeKalb, Jackson64 min
May 7, 8:13 PM CDTSevere Thunderstorm WarningFFCDeKalb, Gwinnett37 min
May 7, 8:38 PM CDTTornado WarningBMXMarshall52 min
May 7, 8:40 PM CDTSevere Thunderstorm WarningBMXLawrence65 min
May 7, 8:43 PM CDTTornado WarningBMXBlount62 min
May 7, 8:43 PM CDTSevere Thunderstorm WarningFFCChattooga47 min
May 7, 8:45 PM CDTSevere Thunderstorm WarningBMXFranklin35 min
May 7, 8:48 PM CDTSevere Thunderstorm WarningBMXWinston62 min
May 7, 8:48 PM CDTSevere Thunderstorm WarningFFCGwinnett32 min
May 7, 8:50 PM CDTSevere Thunderstorm WarningBMXCherokee35 min
May 7, 9:14 PM CDTSevere Thunderstorm WarningBMXDeKalb51 min
May 7, 9:15 PM CDTSevere Thunderstorm WarningFFCFloyd, Gordon35 min
May 7, 9:19 PM CDTSevere Thunderstorm WarningBMXCullman66 min
May 7, 9:22 PM CDTSevere Thunderstorm WarningFFCWalton48 min
May 7, 9:25 PM CDTTornado WarningBMXEtowah, St. Clair65 min
May 7, 9:30 PM CDTSevere Thunderstorm WarningBMXFranklin65 min
May 7, 9:36 PM CDTSevere Thunderstorm WarningBMXCherokee49 min
May 7, 9:49 PM CDTSevere Thunderstorm WarningFFCBartow51 min
May 7, 9:51 PM CDTSevere Thunderstorm WarningBMXWinston64 min
May 7, 9:51 PM CDTSevere Thunderstorm WarningFFCChattooga34 min
May 7, 9:54 PM CDTSevere Thunderstorm WarningBMXCalhoun61 min
May 7, 10:03 PM CDTSevere Thunderstorm WarningFFCBanks, Hall32 min
May 7, 10:12 PM CDTSevere Thunderstorm WarningFFCCherokee48 min
May 7, 10:15 PM CDTSevere Thunderstorm WarningBMXMarion65 min
May 7, 10:28 PM CDTSevere Thunderstorm WarningBMXCleburne47 min
May 7, 10:32 PM CDTSevere Thunderstorm WarningFFCForsyth, Fulton48 min
May 7, 10:51 PM CDTSevere Thunderstorm WarningFFCCoweta, Heard49 min
May 7, 10:57 PM CDTSevere Thunderstorm WarningFFCGwinnett48 min
May 7, 10:58 PM CDTTornado WarningBMXCleburne32 min
May 7, 11:01 PM CDTSevere Thunderstorm WarningBMXCullman49 min
May 7, 11:03 PM CDTSevere Thunderstorm WarningBMXCalhoun62 min
May 7, 11:08 PM CDTTornado WarningFFCCarroll32 min
May 7, 11:24 PM CDTTornado WarningBMXCalhoun36 min
May 7, 11:27 PM CDTSevere Thunderstorm WarningFFCBarrow, Walton33 min
May 7, 11:30 PM CDTTornado WarningBMXCleburne50 min
May 7, 11:37 PM CDTSevere Thunderstorm WarningFFCBartow, Paulding48 min
May 7, 11:42 PM CDTSevere Thunderstorm WarningFFCCarroll, Coweta, Douglas, Fulton33 min
May 7, 11:45 PM CDTSevere Thunderstorm WarningBMXSt. Clair50 min
May 7, 11:45 PM CDTSevere Thunderstorm WarningFFCCherokee, Cobb, Fulton35 min
May 7, 11:52 PM CDTSevere Thunderstorm WarningFFCClarke, Oconee, Walton48 min
May 7, 11:59 PM CDTSevere Thunderstorm WarningFFCFayette51 min
May 8, 12:00 AM CDTTornado WarningBMXCalhoun50 min
May 8, 12:13 AM CDTSevere Thunderstorm WarningFFCMorgan47 min
May 8, 12:16 AM CDTSevere Thunderstorm WarningFFCCarroll34 min
May 8, 12:18 AM CDTTornado WarningBMXCleburne62 min
May 8, 12:31 AM CDTSevere Thunderstorm WarningFFCCoweta, Fulton34 min
May 8, 12:35 AM CDTSevere Thunderstorm WarningFFCHenry, Spalding50 min
May 8, 12:49 AM CDTSevere Thunderstorm WarningFFCFayette36 min
May 8, 12:52 AM CDTSevere Thunderstorm WarningFFCCarroll, Heard33 min
May 8, 12:58 AM CDTSevere Thunderstorm WarningFFCButts52 min

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.0 hours before the alert went out and 116 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, Birmingham, AL at 00:00Z on 1998-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2677 joules per kilogram.LCLEL10008507005003002001001 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, Birmingham, AL at 00:00Z on 1998-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939587897117136Sfc1 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
2677 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
985 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
3.5
Supercell composite
12.4

Open this sounding in Storm Lab

The text

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

820 
WWUS9 KMKC 080036
SEL6  
MKC WW 080036
ALZ000-GAZ000-080600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 306
STORM PREDICTION CENTER NORMAN OK
736 PM CDT THU MAY 7 1998

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   NORTHERN ALABAMA                            
   NORTHERN GEORGIA                            

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 800 PM UNTIL
100 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 50 MILES SOUTHWEST OF MUSCLE SHOALS ALABAMA TO
55 MILES EAST OF ATLANTA GEORGIA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 302.  WATCH NUMBER 302 WILL NOT BE IN EFFECT AFTER 800 PM
CDT.  CONTINUE...WW 303...WW 304...WW 305...

DISCUSSION...LARGE POTENTIALLY TORNADIC SUPERCELL THUNDERSTORMS
OVER NORTHERN GA WILL SPREAD ACROSS THE ATL AREA DURING THE NEXT
COUPLE OF HOURS...WHILE OTHER STORMS FORM OVER NORTHERN AL.  LOW
LEVEL WINDS ARE MORE WESETERLY ACROSS AL...BUT VERY STRONG DEEP
LAYER SHEAR AND CAPE VALUES OVER 4000 J/KG SUGGEST THREAT OF
SUPERCELLS/TORNADOES IN THAT AREA AS WELL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 29040.


...HART

350,0881 342,0832 324,0832 332,0881

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 8:30 PM CDTTornado WatchSPCBaldwin, Banks, Bleckley, Burke, Candler, Clarke and 30 more5 hr
May 8, 1:00 AM CDTTornado WatchSPCBaldwin, Bibb, Bleckley, Bulloch, Burke, Butts and 58 more6 hr
May 8, 12:15 PM CDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 41 more6 hr

Nearby

Tornado Watches in Georgia, 1998Tornado Watches in Alabama, 1998Tornado Watches in Mississippi, 1998Every tornado watch in 1998

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.