Alert archive / Georgia / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 113

March 19, 19984 states

The Storm Prediction Center issued this severe thunderstorm watch at Mar 19, 1998, 11:45 PM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Mar 19, 1998, 11:45 PM CST (05:45 UTC)
Expired
Mar 20, 1998, 5:00 AM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 100 counties

Autauga County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Lee County, AL, Macon County, AL, Randolph County, AL, Russell County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Lumpkin County, GA, Meriwether County, GA, Murray County, GA, Muscogee County, GA, Paulding County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rabun County, GA, Rockdale County, GA, Spalding County, GA, Talbot County, GA, Towns County, GA, Troup County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Jackson County, NC, Macon County, NC, Swain County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Cocke County, TN, Cumberland County, TN, Fentress County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Union County, TN, Washington County, TN

The radar

The Atlanta radar (KFFC), 90 km from the middle of the area, began a volume at 05:49 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 19, 11:45 PM CSTSevere Thunderstorm WarningOHXSequatchie45 min
Mar 19, 11:52 PM CSTSevere Thunderstorm WarningMRXHamilton53 min
Mar 19, 11:55 PM CSTSevere Thunderstorm WarningBMXCalhoun, Cherokee60 min
Mar 19, 11:55 PM CSTSevere Thunderstorm WarningBMXTalladega60 min
Mar 20, 12:00 AM CSTSevere Thunderstorm WarningOHXBledsoe60 min
Mar 20, 12:08 AM CSTSevere Thunderstorm WarningBMXEtowah, St. Clair32 min
Mar 20, 12:13 AM CSTSevere Thunderstorm WarningMRXMeigs, Rhea47 min
Mar 20, 12:16 AM CSTSevere Thunderstorm WarningBMXAutauga, Lowndes79 min
Mar 20, 12:16 AM CSTSevere Thunderstorm WarningBMXCoosa79 min
Mar 20, 12:28 AM CSTSevere Thunderstorm WarningBMXDeKalb47 min
Mar 20, 12:39 AM CSTSevere Thunderstorm WarningBMXClay61 min
Mar 20, 12:47 AM CSTTornado WarningBMXElmore, Montgomery63 min
Mar 20, 12:49 AM CSTSevere Thunderstorm WarningMRXCumberland, McMinn, Roane41 min
Mar 20, 12:56 AM CSTSevere Thunderstorm WarningBMXCleburne64 min
Mar 20, 12:56 AM CSTSevere Thunderstorm WarningBMXTallapoosa64 min
Mar 20, 1:11 AM CSTSevere Thunderstorm WarningMRXLoudon34 min
Mar 20, 1:22 AM CSTSevere Thunderstorm WarningBMXRandolph63 min
Mar 20, 1:35 AM CSTSevere Thunderstorm WarningMRXAnderson, Knox40 min
Mar 20, 1:38 AM CSTSevere Thunderstorm WarningBMXMacon62 min
Mar 20, 1:54 AM CSTSevere Thunderstorm WarningBMXChambers, Lee61 min
Mar 20, 1:57 AM CSTSevere Thunderstorm WarningMRXUnion33 min
Mar 20, 2:00 AM CSTSevere Thunderstorm WarningFFCPolk30 min
Mar 20, 2:55 AM CSTSevere Thunderstorm WarningBMXLee50 min
Mar 20, 3:12 AM CSTSevere Thunderstorm WarningFFCMeriwether, Troup48 min

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.8 hours before the alert went out and 94 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 00:00Z on 1998-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1998-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
973 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
175 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.

945 
WWUS9 KMKC 200509
SEL3  
MKC WW 200509
ALZ000-TNZ000-GAZ000-NCZ000-201100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 113
STORM PREDICTION CENTER NORMAN OK
1209 AM EST FRI MAR 20 1998

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   EASTERN ALABAMA                            
   EASTERN TENNESSEE                          
   NORTHERN AND WESTERN GEORGIA                            
   WESTERN NORTH CAROLINA                     

EFFECTIVE THIS FRIDAY MORNING FROM 1245 AM UNTIL 600 AM EST.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 70 STATUTE MILES
EAST AND WEST OF A LINE FROM 35 MILES SOUTHWEST OF AUBURN ALABAMA
TO 55 MILES NORTH NORTHEAST OF KNOXVILLE TENNESSEE.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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 SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 112.  WATCH NUMBER 112 WILL NOT BE
IN EFFECT AFTER 45 AM EST.

DISCUSSION...SQUALL LINE WITH EMBEDDED BOW ECHOES AHEAD OF STRONG
UPPER TROF MOVING EWD ACROSS ERN TN SSWWD INTO CENTRAL AL.  WITH
STRONG MAINLY UNIDIRECTIONAL WIND FIELDS AND ADEQUATE
MOISTURE/INSTABILITY CONDITIONS REMAIN FAVORABLE FOR DAMAGING WINDS
WITH THE SQUALL LINE.


AVIATION...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 23040.


...HALES

321,0870 363,0845 363,0822 321,0843

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 19, 8:30 PM CSTSevere Thunderstorm WatchSPCBibb, Blount, Chilton, Colbert, Coosa, Cullman and 24 more5 hr
Mar 20, 6:30 AM CSTTornado WatchSPCBanks, Franklin, Hart, Stephens6 hr
Mar 20, 12:00 PM CSTTornado WatchSPCAlamance, Anson, Cabarrus, Caswell, Chatham, Cumberland and 29 more6 hr
Mar 20, 2:00 PM CSTTornado WatchSPCBladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 15 more4 hr

Nearby

Severe Thunderstorm Watches in Georgia, 1998Severe Thunderstorm Watches in Tennessee, 1998Severe Thunderstorm Watches in Alabama, 1998Every severe thunderstorm 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; radar from the NEXRAD Level II archive.