Alert archive / Georgia / Tornado Watches in 1998

Tornado Watch 852

September 29, 199821 counties in Florida; 85 counties in Georgia

The Storm Prediction Center issued this tornado watch at Sep 29, 1998, 7:00 PM EDT for 21 counties in Florida; 85 counties in Georgia. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Sep 29, 1998, 7:00 PM EDT (23:00 UTC)
Expired
Sep 30, 1998, 5:00 AM EDT
In force
10 hr
Issued by
the Storm Prediction Center
All 106 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Madison County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chattahoochee County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Harris County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, McIntosh County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Randolph County, GA, Schley County, GA, Screven County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Ware County, GA, Washington County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 29, 7:31 PM EDTTornado WarningFFCMontgomery, Wheeler34 min
Sep 29, 8:15 PM EDTTornado WarningJAXAppling, Bacon45 min
Sep 29, 11:17 PM EDTFlash Flood WarningJAXAtkinson, Bacon, Coffee, Jeff Davis, Ware9 hr
Sep 29, 11:17 PM EDTFlash Flood WarningJAXAppling, Pierce9 hr
Sep 29, 11:17 PM EDTFlash Flood WarningJAXCharlton9 hr
Sep 30, 12:52 AM EDTTornado WarningJAXSuwannee63 min
Sep 30, 12:57 AM EDTTornado WarningJAXHamilton63 min
Sep 30, 1:10 AM EDTTornado WarningTAELafayette20 min
Sep 30, 1:53 AM EDTTornado WarningJAXSuwannee77 min
Sep 30, 3:09 AM EDTTornado WarningJAXSuwannee81 min
Sep 30, 3:37 AM EDTFlash Flood WarningJAXHamilton, Suwannee6 hr
Sep 30, 4:10 AM EDTTornado WarningJAXColumbia, Hamilton75 min

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 11.0 hours before the alert went out and 155 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, Jacksonville, FL at 12:00Z on 1998-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 445 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, Jacksonville, FL at 12:00Z on 1998-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
445 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

156 
WWUS9 KMKC 292237 
SEL2  
MKC WW 292237 
FLZ000-GAZ000-300900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 852
STORM PREDICTION CENTER NORMAN OK
637 PM EDT TUE SEP 29 1998

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

NORTHERN FLORIDA
SOUTHERN AND CENTRAL GEORGIA
AND ADJACENT COASTAL WATERS

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 700 PM
UNTIL 500 AM EDT.

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

THE TORNADO WATCH AREA IS ALONG AND 105 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES NORTHEAST OF MACON GEORGIA TO 25 MILES EAST
SOUTHEAST OF CROSS CITY FLORIDA.

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 850.  WATCH NUMBER 850 WILL NOT BE IN EFFECT AFTER 700 PM
EDT.  CONTINUE...WW 851...

DISCUSSION...THREAT FOR ISOLATED TORNADOES EXPECTED TO CONTINUE AS
T.D. GEORGES PROGRESSES FARTHER ENEWD.  ALTHOUGH VERTICAL SHEAR HAS
WEAKENED SOMEWHAT COMPARED TO THIS TIME YESTERDAY...PROFILES REMAIN
MILDLY SUPPORTIVE OF LOW-LEVEL CYCLOGENESIS.  ISOLATED STORMS NOW
DEVELOPING OVER E CENTRAL/SE GA WELL AHEAD OF T.D. CIRCULATION
CENTER SHOULD DIMINISH LATER THIS EVENING.  THIS WILL LEAVE MAIN
TORNADIC THREAT CONFINED TO CONVERGENCE BANDS IMMEDIATELY AHEAD OF
T.D. CIRCULATION CENTER.       

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 480.  MEAN STORM MOTION VECTOR 18035.

...CORFIDI

330,0812 292,0805 292,0842 330,0850

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 11:00 PM EDTTornado WatchSPCBay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 9 more12 hr
Sep 29, 11:00 AM EDTTornado WatchSPCBay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 9 more9 hr

Nearby

Tornado Watches in Georgia, 1998Tornado Watches in Florida, 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.