Alert archive / Florida / Tornado Warnings in 1998

Tornado Warning 34, NWS Miami, FL

November 4, 1998Monroe County, Florida

NWS Miami, FL issued this tornado warning at Nov 4, 1998, 6:41 PM EST for Monroe County, Florida. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 4, 1998, 6:41 PM EST (23:41 UTC)
Expired
Nov 4, 1998, 7:15 PM EST
In force
34 min
Issued by
NWS Miami, FL
Area
Whole counties

County Monroe County, FL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Nov 4, 12:30 PM ESTTornado WatchSPC12 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 11.7 hours before the alert went out and 69 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, Miami, FL at 12:00Z on 1998-11-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 715 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, Miami, FL at 12:00Z on 1998-11-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 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
715 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

532 
WFUS1 KMIA 042342 RRA
TORMIA
FLC087-050015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
641 PM EST WED NOV 4 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  MONROE UPPER KEYS IN SOUTHERN FLORIDA

* UNTIL 715 PM EST

* AT 639 PM EST MIAMI DOPPLER RADAR CONTINUED TO SHOW A SEVERE
  THUNDERSTORM WITH A TORNADO 2 MILES NORTHEAST OF THE U.S. 1 AND
  CARD SOUND ROAD INTERSECTION OR ABOUT 6 MILES NORTHEAST OF KEY
  LARGO. A TORNADO WAS REPORTED TO HAVE CAUSED DAMAGE AT MILE MARKER
  106 ON KEY LARGO. THE SEVERE THUNDERSTORM WAS MOVING NORTHEAST AT
  25 MPH.

* SOME LOCATIONS AFFECTED...
  ON THIS PATH THIS STORM WILL AFFECT THE NORTHERN END OF KEY LARGO
  THROUGH 7 PM EST.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STURDY
STRUCTURE IS NEARBY...SEEK SAFETY IN A DITCH OR LOW SPOT.

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 4, 3:51 PM ESTTornado WarningMFLPalm Beach59 min
Nov 4, 4:39 PM ESTTornado WarningMFLMonroe46 min
Nov 4, 5:24 PM ESTTornado WarningMFLMonroe46 min
Nov 4, 6:08 PM ESTTornado WarningMFLMonroe32 min
Nov 4, 6:53 PM ESTTornado WarningMFLMiami-Dade47 min

Nearby

Tornado Warnings in Florida, 1998Every tornado warning in 1998Tornadoes 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.