Alert archive / Florida / Tornado Watches in 1998

Tornado Watch 883

November 5, 199810 counties in Florida

The Storm Prediction Center issued this tornado watch at Nov 5, 1998, 12:00 AM EST for 10 counties in Florida. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Nov 5, 1998, 12:00 AM EST (05:00 UTC)
Expired: Nov 5, 1998, 7:00 AM EST
In force: 7 hr
Issued by: the Storm Prediction Center

Counties Broward County, FL, Charlotte County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL, Saint Lucie County, FL

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Nov 5, 12:13 AM EST	Severe Thunderstorm Warning	MFL	Palm Beach	32 min
Nov 5, 1:06 AM EST	Flash Flood Warning	MFL	Broward, Miami-Dade	2 hr
Nov 5, 1:06 AM EST	Flash Flood Warning	MFL	Palm Beach	2 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 5.0 hours before the alert went out and 66 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 110 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 853 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 367 m²/s²
0-3 km storm-relative helicity: 607 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 17.0

Open this sounding in Storm Lab

The text

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

747 
WWUS9 KMKC 050418
SEL3  
MKC WW 050418
FLZ000-051200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 883
STORM PREDICTION CENTER NORMAN OK
1118 PM EST WED NOV 4 1998

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

   SOUTH FLORIDA                            
   AND ADJACENT COASTAL WATERS

EFFECTIVE THIS THURSDAY MORNING FROM MIDNIGHT EST UNTIL 700 AM EST.

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

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EITHER SIDE OF
A LINE FROM 65 MILES NORTHEAST OF FORT MEYERS FLORIDA TO 65 MILES
SOUTH OF MIAMI 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 882.  WATCH NUMBER 882 WILL NOT BE IN EFFECT AFTER MIDNIGHT
EST.

DISCUSSION...VERY FAVORABLE SHEAR PROFILES REMAIN ACROSS S FL IN
ADVANCE OF T.S. MITCH.  STRONG/SEVERE STORMS WILL CONTINUE TO
DEVELOP AND MOVE ONSHORE NEXT SEVERAL HOURS S FL...WITH GREATEST
THREAT FOR SUPERCELLS/TORNADOS VICINTY OF E/W FRONTAL ZONE NEAR FMY
EWD TO PBI.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 550.  MEAN STORM MOTION VECTOR 22030.


...HALES

273,0801 250,0792 243,0811 265,0820

Nearby

Tornado Watches in Florida, 1998 Every 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.