Alert archive / Florida / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 8, NWS Miami, FL

September 30, 1987Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Sep 30, 1987, 11:10 PM EDT for Miami-Dade County, Florida. It was in force for 65 min. 1 report 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
Sep 30, 1987, 11:10 PM EDT (03:10 UTC)
Expired
Oct 1, 1987, 12:15 AM EDT
In force
65 min
Issued by
NWS Miami, FL
Area
Whole counties

County 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.

What was reported inside it

TimeReportWhereRemark
Sep 30, 11:25 PM EDTThunderstorm Wind 50Miami-Dade, FL

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Key West, FL (KEYW), launched 00:00Z, 3.2 hours before the alert went out and 169 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 00:00Z on 1987-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1915 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 00:00Z on 1987-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 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
1915 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
772 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 010310
SVRMIA
FLC025-010415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1110 PM EDT WED SEP 30 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND 
SPECIAL MARINE WARNING EFFECTIVE UNTIL 1215 AM EDT FOR PEOPLE IN THE 
FOLLOWING COUNTY OF

SOUTHEAST FLORIDA...SOUTHERN DADE
...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTY JUST MENTIONED

A SEVERE THUNDERSTORM NEAR HOMESTEAD AT 11 PM WAS MOVING EAST 25
TO 30 MPH AND WILL MOVE OVER THE SOUTHERN PART OF BISCAYNE BAY
AND CONTINUE OFFSHORE IN THE PERIOD FROM NOW UNTIL MIDNIGHT WITH
POSSIBLY DAMAGING WINDS AND HAIL AS WELL AS DISRUPTIVE RAINFALL.
MARINE INTERESTS SHOULD SEEK SAFE HARBOR IMMEDIATELY UNTIL THIS
STORM HAS PASSED.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY..AND YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR S8EVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 1, 3:00 AM EDTSevere Thunderstorm WarningMFLMonroe60 min

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