Alert archive / Florida / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 1, NWS Miami, FL

February 7, 1986Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 7, 1986, 3:30 PM EST for Miami-Dade County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Feb 7, 1986, 3:30 PM EST (20:30 UTC)
Expired
Feb 7, 1986, 4:30 PM EST
In force
60 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.

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 8.5 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 12:00Z on 1986-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 756 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 1986-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
756 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
902 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 072030
SVRMIA
FLC025-072130-

ZZZZZ
BULLETIN  IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
330 PM EST FRI FEB 7 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 430 PM FOR PERSONS IN THE FOLLOWING COUNTY
IN SOUTH FLORIDA...DADE.

AT 330PM EST SEVERAL FUNNEL CLOUDS WERE REPORTED IN THE DADELAND
AREA. CONDITIONS ARE RIGHT FOR FURTHER FUNNEL CLOUD FORMATION.

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, Feb 7, 2:50 PM EST, 40 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
300 PM EST FRI FEB 7 1986

AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS HAS FORMED OVER
BROWARD AND DADE COUNTIES THIS AFTERNOON. MOTORISTS SH.OULD BE ON
THE ALERT FOR OCCASIONAL REDUCED VISIBILITIES IN HEAVY RAIN ALONG
WITH LOCALIZED FLOODING IN LOW LYING AREAS.

THE SHOWERS AND THUNDERSTORMS WILL SLOWLY DISSIPATE THIS EVENING.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 7, 3:35 PM ESTTornado WarningMFLMiami-Dade55 min

Nearby

Severe Thunderstorm Warnings in Florida, 1986Every severe thunderstorm warning in 1986

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.