Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 1, NWS Miami, FL

February 2, 1998Monroe County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 2, 1998, 4:16 PM EST for Monroe County, Florida. It was in force for 59 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Feb 2, 1998, 4:16 PM EST (21:16 UTC)
Expired
Feb 2, 1998, 5:15 PM EST
In force
59 min
Issued by
NWS Miami, FL
Area
Whole counties

County Monroe County, FL

What was reported inside it

TimeReportWhereRemark
Feb 2, 4:25 PM ESTThunderstorm Wind 65Big Pine, FLTwo trees fell into house.
Feb 2, 5:25 PM ESTThunderstorm Wind 71Duck Key, FLReported from Conch Key just north of Duck Key.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Feb 2, 2:00 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 9.3 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 1998-02-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 121 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 1998-02-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897Sfc1 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
121 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
279 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

387 
WUUS1 KMIA 022118 RRA
SVRMIA
FLC087-022215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
416 PM EST MON FEB 2 1998

THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHERN FLORIDA

   ...MONROE LOWER KEYS

AT 415 PM EST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 20
MILES SOUTH OF KEY WEST MOVING NORTH AT 55 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE...
  BIG COPPITT KEY (MM 10)        BY ABOUT 445 PM EST
  BOCA CHICA (MM 8)              BY ABOUT 447 PM EST
  SUMMERLAND KEY (MM 25)         BY ABOUT 451 PM EST
  CUDJOE KEY (MM 22)             BY ABOUT 455 PM EST
  BIG PINE KEY (MM 30)           BY ABOUT 500 PM EST



SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. SEEK SHELTER
IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES.

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

Special weather statement, Feb 2, 11:43 AM EST, 4 hours 33 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-022200-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MIAMI FL
1140 AM EST MON FEB 3 1998

...GALE WARNING THIS AFTERNOON AND TONIGHT...
...RIP CURRENTS LIKELY ALONG SOUTHEAST FLORIDA COAST TODAY...
...WIND ADVISORY ACROSS SOUTH FLORIDA TODAY...

GALE WARNINGS ARE IN EFFECT FOR THE COASTAL WATERS OF SOUTH
FLORIDA AND A WIND ADVISORY IS IN EFFECT FOR THE MAINLAND
AND THE KEYS. SOUTHEAST WINDS OF 30 TO 35 KTS OVER THE WATER
AND 25 TO 30 MPH WITH HIGHER GUSTS OVER THE MAINLAND AND THE
KEYS WILL CONTINUE INTO TONIGHT.

THESE STRONG SOUTHEAST WINDS WILL MAKE RIP CURRENTS LIKELY ALONG
PALM BEACH...BROWARD...AND DADE COUNTY BEACHES THIS AFTERNOON. SURF
CONDITIONS WILL BE VERY ROUGH AND SWIMMING COULD BE DEADLY. MOTORISTS
...ESPECIALLY THOSE DRIVING HIGH WIND PROFILE VEHICLES ARE ADVISED
TO DRIVE WITH EXTRA CARE DUE TO STRONG WIND GUSTS.

HIGHER THAN NORMAL TIDE CONDITIONS ARE ALSO EXPECTED WITH MINOR
COASTAL FLOODING POSSIBLE ACROSS THE KEYS DURING THE TIME OF HIGH
TIDE.

THE WINDS ARE THE RESULT OF A DEEPENING LOW PRESSURE IN THE CENTRAL
GULF OF MEXICO. AS THE LOW PRESSURE STRENGTHENS...A WARM FRONT WILL
MOVE NORTHWARD OVER SOUTH FLORIDA. SHOWERS AND POSSIBLY SEVERE
THUNDERSTORMS WILL DEVELOP OVER SOUTH FLORIDA LATER THIS AFTERNOON
AND INTO TONIGHT. THESE STORMS WILL BRING PERIODS OF HEAVY RAIN...
STRONG WIND GUSTS AND POSSIBLE TORADOES.

DB/AZ
Special weather statement, Feb 2, 11:44 AM EST, 4 hours 32 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-022200-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MIAMI FL
1140 AM EST MON FEB 3 1998

...GALE WARNING THIS AFTERNOON AND TONIGHT...
...RIP CURRENTS LIKELY ALONG SOUTHEAST FLORIDA COAST TODAY...
...WIND ADVISORY ACROSS SOUTH FLORIDA TODAY...

GALE WARNINGS ARE IN EFFECT FOR THE COASTAL WATERS OF SOUTH
FLORIDA AND A WIND ADVISORY IS IN EFFECT FOR THE MAINLAND
AND THE KEYS. SOUTHEAST WINDS OF 30 TO 35 KTS OVER THE WATER
AND 25 TO 30 MPH WITH HIGHER GUSTS OVER THE MAINLAND AND THE
KEYS WILL CONTINUE INTO TONIGHT.

THESE STRONG SOUTHEAST WINDS WILL MAKE RIP CURRENTS LIKELY ALONG
PALM BEACH...BROWARD...AND DADE COUNTY BEACHES THIS AFTERNOON. SURF
CONDITIONS WILL BE VERY ROUGH AND SWIMMING COULD BE DEADLY. MOTORISTS
...ESPECIALLY THOSE DRIVING HIGH WIND PROFILE VEHICLES ARE ADVISED
TO DRIVE WITH EXTRA CARE DUE TO STRONG WIND GUSTS.

HIGHER THAN NORMAL TIDE CONDITIONS ARE ALSO EXPECTED WITH MINOR
COASTAL FLOODING POSSIBLE ACROSS THE KEYS DURING THE TIME OF HIGH
TIDE.

THE WINDS ARE THE RESULT OF A DEEPENING LOW PRESSURE IN THE CENTRAL
GULF OF MEXICO. AS THE LOW PRESSURE STRENGTHENS...A WARM FRONT WILL
MOVE NORTHWARD OVER SOUTH FLORIDA. SHOWERS AND POSSIBLY SEVERE
THUNDERSTORMS WILL DEVELOP OVER SOUTH FLORIDA LATER THIS AFTERNOON
AND INTO TONIGHT. THESE STORMS WILL BRING PERIODS OF HEAVY RAIN...
STRONG WIND GUSTS AND POSSIBLE TORNADOES.

DB/AZ

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 2, 3:32 PM ESTTornado WarningMFLMonroe118 min
Feb 2, 3:51 PM ESTTornado WarningMFLMonroe119 min
Feb 2, 4:54 PM ESTSevere Thunderstorm WarningMFLCollier, Monroe91 min
Feb 2, 5:27 PM ESTSevere Thunderstorm WarningMFLMonroe93 min
Feb 2, 5:38 PM ESTSevere Thunderstorm WarningMFLMiami-Dade57 min
Feb 2, 6:00 PM ESTTornado WarningMFLMonroe65 min
Feb 2, 6:19 PM ESTSevere Thunderstorm WarningMFLBroward61 min
Feb 2, 6:25 PM ESTSevere Thunderstorm WarningMFLCollier, Monroe95 min
Feb 2, 6:39 PM ESTSevere Thunderstorm WarningMFLMiami-Dade61 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.