Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 19, NWS Miami, FL

February 15, 1998Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 15, 1998, 9:19 PM EST for Broward County, Palm Beach County, Florida. It was in force for 61 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
Feb 15, 1998, 9:19 PM EST (02:19 UTC)
Expired
Feb 15, 1998, 10:20 PM EST
In force
61 min
Issued by
NWS Miami, FL
Area
Whole counties

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 88 km from the middle of the area, began a volume at 02:21 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Feb 15, 6:15 PM ESTTornado WatchSPC7 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 2.3 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-pSkew-T log-p diagram, Miami, FL at 00:00Z on 1998-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 449 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 00:00Z on 1998-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 266 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
449 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
588 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
266 m²/s²
0-3 km storm-relative helicity
512 m²/s²
Significant tornado parameter
0.7
Supercell composite
5.1

Open this sounding in Storm Lab

The text

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

916 
WUUS1 KMIA 160220 RRA
SVRMIA
FLC011-099-160320-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
919 PM EST SUN FEB 15 1998

THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1020 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHEASTERN FLORIDA

   ...SOUTHWESTERN PALM BEACH COUNTY
   ...WESTERN BROWARD COUNTY

AT 918 PM EST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 21
MILES WEST OF TWENTYSIX MILE BEND OR 18 MILES SOUTHWEST OF TERRYTOWN
MOVING EAST AT 40 MPH.

THE STORM WILL MOVE ACROSS ALLIGATOR ALLEY AND THE EVERGLADES
OVER WESTERN BROWARD AND SOUTHWEST PALM COUNTY DURING THE NEXT
HOUR.

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 15, 3:30 PM EST, 5 hours 49 minutes before
AMZ610-630-650>654-656-670>676-FLZ063-066>078-161200-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MIAMI FL
330 PM EST SUN FEB 15 1998

...GALE WARNING SURROUNDING COASTAL WATERS TONIGHT...
...WIND ADVISORY ACROSS THE MAINLAND AND KEYS TONIGHT...
...COASTAL FLOOD WATCH COLLIER AND MAINLAND MONROE GULF COAST TONIGHT...

STRONG SOUTHEAST WINDS WHICH WILL BECOME SOUTHERLY OVERNIGHT WILL PRODUCE
PROBLEMS OVER LAND AND COASTAL AREAS OF SOUTH FLORIDA TONIGHT.

GALE WARNINGS FOR WIND OF 30 TO 35 KT ARE POSSIBLE OVER THE COASTAL WATERS.
ON THE MAINLAND...THIS MEANS SUSTAINED WINDS OF 20 TO 25 MPH ARE POSSIBLE
THROUGH THE NIGHT. ON THE SOUTHWEST FLORIDA COAST...THESE STRONG WINDS MAY
CREATE SEAS OF 2 TO 3 FT ABOVE HIGH TIDE AFTER MIDNIGHT AND COASTAL FLOODING
IS POSSIBLE.

STRONG THUNDERSTORMS ARE ALSO EXPECTED OVER SOUTH FLORIDA AND THE KEYS THIS
EVENING AND SOME THUNDERSTORMS MAY BE SEVERE.
Special weather statement, Feb 15, 3:30 PM EST, 5 hours 49 minutes before
AMZ610-630-650>654-656-670>676-FLZ063-066>078-161200-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MIAMI FL
330 PM EST SUN FEB 15 1998

...GALE WARNING SURROUNDING COASTAL WATERS TONIGHT...
...WIND ADVISORY ACROSS THE MAINLAND AND KEYS TONIGHT...
...COASTAL FLOOD WATCH COLLIER AND MAINLAND MONROE GULF COAST TONIGHT...

STRONG SOUTHEAST WINDS WHICH WILL BECOME SOUTHERLY OVERNIGHT WILL PRODUCE
PROBLEMS OVER LAND AND COASTAL AREAS OF SOUTH FLORIDA TONIGHT.

GALE WARNINGS FOR WIND OF 30 TO 35 KT ARE POSSIBLE OVER THE COASTAL WATERS.
ON THE MAINLAND...THIS MEANS SUSTAINED WINDS OF 20 TO 25 MPH ARE POSSIBLE
THROUGH THE NIGHT. ON THE SOUTHWEST FLORIDA COAST...THESE STRONG WINDS MAY
CREATE SEAS OF 2 TO 3 FT ABOVE HIGH TIDE AFTER MIDNIGHT AND COASTAL FLOODING
IS POSSIBLE.

STRONG THUNDERSTORMS ARE ALSO EXPECTED OVER SOUTH FLORIDA AND THE KEYS THIS
EVENING AND SOME THUNDERSTORMS MAY BE SEVERE.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 7:04 PM ESTTornado WarningMFLCollier61 min
Feb 15, 8:02 PM ESTTornado WarningMFLCollier58 min
Feb 15, 8:27 PM ESTSevere Thunderstorm WarningMFLGlades, Hendry63 min
Feb 15, 11:07 PM ESTSevere Thunderstorm WarningMFLPalm Beach38 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.