Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 92, NWS Miami, FL

November 4, 1998Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Nov 4, 1998, 9:31 PM EST for Collier County, Florida. It was in force for 44 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, 9:31 PM EST (02:31 UTC)
Expired
Nov 4, 1998, 10:15 PM EST
In force
44 min
Issued by
NWS Miami, FL
Area
Whole counties

County Collier 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 00:00Z, 2.5 hours before the alert went out and 113 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 00:00Z on 1998-11-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 110 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1998-11-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 367 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
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.

299 
WUUS1 KMIA 050232 RRA
SVRMIA
FLC021-050315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
931 PM EST WED NOV 4 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN COLLIER COUNTY IN SOUTHWESTERN FLORIDA

* UNTIL 1015 PM EST

* AT 928 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTH OF EVERGLADES CITY MOVING
  NORTHEAST AT 30 MPH. THIS STORM WILL AFFECT AREAS OF SOUTHERN
  COLLIER COUNTY FROM EVERGLADES CITY EASTWARD.

IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Nov 4, 6:35 PM EST, 2 hours 56 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
735 PM EDT WED NOV 04 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0630 PM    KEY LARGO                 FL   TORNADO
11/04/98   MONROE                         *** 20 INJ ESTIMATED ***
                                          MONROE EOC REPORTS LOTS OF
                                          MINOR INJURIES AND A FEW
                                          MAJOR INJURIES AT THE
                                          CALUSA COVE AND RIVIERA
                                          CAMPGROUNDS ON KEY LARGO
                                          NEAR LAKE SURPRISE.
Local storm report, Nov 4, 7:02 PM EST, 2 hours 29 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
702 PM EST WED NOV 04 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0340 PM    BOYNTON BEACH             FL
11/04/98   PALM BEACH                     FUNNEL CLOUD REPORTED WEST
                                          OF U.S. 441 AND BOYNTON
                                          BEACH BLVD. REPORTED BY
                                          PALM BEACH EOC.

0420 PM    HYPOLUXO                  FL   TORNADO
11/04/98   PALM BEACH                     BRIEF TORNADO TOUCHDOWN
                                          REPORTED BY PALM BEACH EOC
                                          AT THE TURNPIKE AND
                                          HYPOLUXO ROAD. NO DAMAGE
                                          REPORT AVAILABLE.

0447 PM    MARATHON                  FL   50 MPH TSTM GUST
11/04/98   MONROE                         WIND GUST TO 50 MPH
                                          REPORTED BY MONROE EOC AT
                                          MARATHON ALSO POSSIBLE
                                          TORNADO PASSAGE NEARBY.

0500 PM    MARATHON                  FL   TORNADO
11/04/98   MONROE                         PUBLIC REPORTED TORNADO
                                          TOUCHDOWNS AT GRASSY KEY
                                          AND LAYTON...BOTH EAST OF
                                          MARATHON.

0510 PM    MARATHON                  FL   TORNADO
11/04/98   MONROE                         TORNADO DAMAGE REPORTED ON
                                          U.S.1 AT MILE MARKER 80.

0625 PM    KEY LARGO                 FL   TORNADO
11/04/98   MONROE                         TRACTOR TRAILER OVERTURNED
                                          AND PEOPLE REPORTED
                                          TRAPPED IN TRAILERS AT
                                          CALUSA COVE NEAR MILE
                                          MARKER 106 ON U.S. 1
                                          REPORTED BY MONROE EOC.
Local storm report, Nov 4, 7:35 PM EST, 1 hour 56 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
735 PM EDT WED NOV 04 1998

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0630 PM    KEY LARGO                 FL   TORNADO
11/04/98   MONROE                         *** 20 INJ ESTIMATED ***
                                          MONROE EOC REPORTS LOTS OF
                                          MINOR INJURIES AND A FEW
                                          MAJOR INJURIES AT THE
                                          CALUSA COVE AND RIVIERA
                                          CAMPGROUNDS ON KEY LARGO
                                          NEAR LAKE SURPRISE.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 4, 10:16 PM ESTSevere Thunderstorm WarningMFLCollier44 min
Nov 4, 10:58 PM ESTTornado WarningMFLCollier32 min
Nov 4, 11:43 PM ESTTornado WarningMFLBroward32 min
Nov 5, 12:13 AM ESTSevere Thunderstorm WarningMFLPalm Beach32 min
Nov 5, 1:06 AM ESTFlash Flood WarningMFLBroward, Miami-Dade2 hr
Nov 5, 1:06 AM ESTFlash Flood WarningMFLPalm Beach2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning 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.