Alert archive / Georgia / Tornado Watches in 1998

Tornado Watch 39

February 16, 199824 counties in Florida; 28 counties in Georgia

The Storm Prediction Center issued this tornado watch at Feb 16, 1998, 6:15 PM EST for 24 counties in Florida; 28 counties in Georgia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Feb 16, 1998, 6:15 PM EST (23:15 UTC)
Expired
Feb 17, 1998, 1:00 AM EST
In force
7 hr
Issued by
the Storm Prediction Center
All 52 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Levy County, FL, Liberty County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Wakulla County, FL, Atkinson County, GA, Bacon County, GA, Baker County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Calhoun County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Echols County, GA, Grady County, GA, Irwin County, GA, Lanier County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Ware County, GA, Wayne County, GA, Worth County, GA

The radar

The Tallahassee radar (KTLH), 84 km from the middle of the area, began a volume at 23:18 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Feb 16, 7:46 PM ESTSevere Thunderstorm WarningTAELafayette34 min
Feb 16, 7:47 PM ESTTornado WarningJAXAlachua43 min
Feb 16, 8:06 PM ESTSevere Thunderstorm WarningJAXUnion29 min
Feb 16, 8:18 PM ESTSevere Thunderstorm WarningJAXBaker42 min
Feb 16, 8:21 PM ESTSevere Thunderstorm WarningTAEDixie, Taylor49 min
Feb 16, 8:31 PM ESTSevere Thunderstorm WarningJAXNassau44 min
Feb 16, 8:48 PM ESTSevere Thunderstorm WarningTAELafayette, Madison32 min
Feb 16, 8:55 PM ESTSevere Thunderstorm WarningJAXSuwannee45 min
Feb 16, 9:23 PM ESTSevere Thunderstorm WarningJAXColumbia, Hamilton42 min
Feb 16, 10:27 PM ESTSevere Thunderstorm WarningTAELafayette, Taylor33 min
Feb 16, 10:57 PM ESTSevere Thunderstorm WarningJAXColumbia, Hamilton, Suwannee48 min
Feb 16, 11:13 PM ESTSevere Thunderstorm WarningJAXClinch, Echols32 min
Feb 16, 11:32 PM ESTSevere Thunderstorm WarningJAXBaker48 min
Feb 16, 11:52 PM ESTSevere Thunderstorm WarningJAXNassau48 min
Feb 17, 12:10 AM ESTSevere Thunderstorm WarningTAEDecatur30 min
Feb 17, 12:12 AM ESTTornado WarningJAXCamden, Charlton33 min
Feb 17, 12:28 AM ESTSevere Thunderstorm WarningTAEBaker32 min
Feb 17, 12:38 AM ESTSevere Thunderstorm WarningJAXColumbia, Gilchrist, Suwannee32 min
Feb 17, 12:54 AM ESTSevere Thunderstorm WarningJAXBaker, Union31 min

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.3 hours before the alert went out and 82 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, Tallahassee Rgnl, FL at 12:00Z on 1998-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 87 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, Tallahassee Rgnl, FL at 12:00Z on 1998-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 262 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
87 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
262 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

137 
WWUS9 KMKC 162300
SEL9  
MKC WW 162300
FLZ000-GAZ000-170600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 39
STORM PREDICTION CENTER NORMAN OK
600 PM EST MON FEB 16 1998

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

   NORTHERN FLORIDA                            
   SOUTHERN GEORGIA                            
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 615 PM UNTIL
100 AM EST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 95 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 95 STATUTE MILES EAST AND WEST
OF A LINE FROM 80 MILES SOUTH SOUTHWEST OF CROSS CITY FLORIDA TO 60
MILES EAST NORTHEAST OF ALBANY 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...  CONTINUE...WW 36...WW 37...WW 38...

DISCUSSION...POTENTIAL FOR SUPERCELLS AND TORNADOES EXPECTED TO
INCREASE THIS EVENING THROUGH TONIGHT ACROSS THE FL COASTAL BEND
...N FL AND S GA AS EXIT REGION OF STRONG SOUTHERN BRANCH SPEED MAX
NOW OVER THE TX GULF COAST CONTINUES E ACROSS THE NRN GULF.  WATCH
REGION IS ALREADY BEING INFLUENCED BY LARGE SCALE ASCENT DOWNSTREAM
FROM THIS SYSTEM...AS EVIDENCED BY SURFACE PRESSURE FALLS AND
INCREASING COVERAGE/INTENSITY OF THUNDERSTORMS NOW OVER THE
NORTHEASTERN GULF.  STRONGEST ACTIVITY MAY FOCUS ON LEADING EDGE OF
RETURNING UNMODIFIED GULF AIR...WHICH AT THE MOMENT IS ORIENTED E/W
ALONG ROUGHLY 28N.  

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 80 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 520. 
MEAN STORM MOTION VECTOR 22040.


...CORFIDI

283,0851 314,0844 314,0813 283,0820

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 16, 8:30 AM ESTTornado WatchSPCAlachua, Citrus, Dixie, Hernando, Hillsborough, Levy and 4 more5 hr
Feb 16, 1:00 PM ESTTornado WatchSPCBrevard, Citrus, Flagler, Hardee, Hernando, Hillsborough and 13 more5 hr
Feb 16, 1:15 PM ESTTornado WatchSPCCalhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa and 2 more6 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; radar from the NEXRAD Level II archive.