Alert archive / Florida / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 2, NWS Miami, FL

April 15, 1987Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 15, 1987, 2:28 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Apr 15, 1987, 2:28 PM EDT (18:28 UTC)
Expired
Apr 15, 1987, 3:30 PM EDT
In force
62 min
Issued by
NWS Miami, FL
Area
Whole counties

Counties Broward County, FL, Miami-Dade County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 6.5 hours before the alert went out and 193 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, Key West, FL at 12:00Z on 1987-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1597 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, Key West, FL at 12:00Z on 1987-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
1597 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
617 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
1.5
Supercell composite
9.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 151828
SVRMIA
FLC011-025-151930-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
228 PM EDT WED APR 15 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND 
SPECIAL MARINE WARNING EFFECTIVE UNTIL 330 PM EDT FOR PEOPLE IN THE 
FOLLOWING COUNTIES OF

SOUTHEAST FLORIDA...BROWARD AND NORTHERN DADE
...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTIES JUST MENTIONED

RADAR INDICATES SEVERAL INTENSE THUNDERSTORMS DEVLOPING RAPIDLY
OVER MOST OF BROWARD AND NORTHERN DADE COUNTIES. HAIL HAS ALSO
BEEN REPORTED BY THE PUBLIC AND THE NORTH DADE WATER PLANT.

SEEK SHELTER FROM THIS THUNDERSTORM IN A STRONG BUILDING. DAMAGING
WIND..HAIL..VERY HEAVY RAIN..AND DEADLY LIGHTNING ARE ALL POSSIBLE
IN THIS THUNDERSTORM.  DO NOT USE TELEPHONES OR ELECTRICAL
APPLIANCES AND STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS
PASSED.

THIS STORM WILL BE ACCOMPANIED BY DEADLY LIGHTNING..WIND EXCEEDING
GALE FORCE AND VERY ROUGH SEAS.  BOATERS SHOULD SEEK SAFE HARBOR.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER..
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY..AND YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

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, Apr 15, 2:00 PM EDT, 28 minutes before
TTAAOO KPBI 151800??SOU
SPECIAL WEATHER AND MARINE STATEMENT
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
200 PM EDT WED APR 15 1987

...A TORNADO WATCH IS IN EFFECT FOR PALM-BEACH...OKEECHOBEE..ST-LUCIE
AND MARTIN COUNTIES UNTIL 6PM EDT...

AT 200 PM EDT RADAR INDICATED SHOWERS AND THUNDERSTORMS SCATTERED OVER
THE ABOVE MENTIONED COUNTIES. THEY WERE HOWEVER MORE NUNEROUS AND
STRONGER OVER ADJACANT COUNTIES TO THE SOUTH AND NORTH. MOVEMENT WAS
NORTHEST AROUND 20 MILES AN HOUR. RATHER STRONG THUNDERSTORMS WERE
ALONG THE COAST NEAR BOCA RATON TO THE SOUTH AND NEAR JUPITOR AND HOBE
SOUND TO THE NORTH. MOVING NORTHEAST THEY WILL BE OFFSHORE WITHIN THE
HOUR.

THE POTENTIAL FOR SEVERE WEATHER CONTINUES THROUGH THE AFLTERNOON.
RESIDENTS SHOULD MONITOR LOCAL CONDITION AND LISTEN FOR LATER
STATEMENTS AND WARNINGS SHOULD SEVERE WEATHER DEVELOP.
Local storm report, Apr 15, 2:20 PM EDT, 8 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ORLANDO FL
1404 PM EDT WED APR 15 1987

1125 AM: 4 MOBILE HOMES DAMAGED , 1 OVERTURNED, 2 ROOFS BLOWN OFF,
         OTHER WINDOW AND ROOF DAMAGE. JUST SOUTH OF LEESBURG FL.

1155 AM: SEVERAL MOBILE HOMES DAMAGED AND OVERTURNED.  5 MILES EAST
         OF MOUNT DORA.

         TORNADO WARNING ISSUED FOR LAKE COUNTY 1105 AM EDT TO 1205 PM EDT.
         TORNADO WARNING ISSUED FOR LAKE AND NORTH ORANGE COUNTY AT
         1145 AM EDT TO 1245 PM EDT.

         WSO MCO

Nearby

Severe Thunderstorm Warnings in Florida, 1987Every severe thunderstorm warning in 1987

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.