Alert archive / Florida / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 65, NWS Miami, FL

September 12, 1996Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Sep 12, 1996, 4:40 PM EDT for Miami-Dade County, Florida. It was in force for 50 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
Sep 12, 1996, 4:40 PM EDT (20:40 UTC)
Expired
Sep 12, 1996, 5:30 PM EDT
In force
50 min
Issued by
NWS Miami, FL
Area
Whole counties

County Miami-Dade County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.7 hours before the alert went out and 31 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 1996-09-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2217 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 1996-09-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
2217 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
687 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
69 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 122040
SVRMIA
FLC025-122130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
440 PM EDT THU SEP 12 1996
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST FLORIDA
 
   ...NORTHEASTERN DADE COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
LARGE HAIL AROUND THREE QUARTERS INCH IN DIAMETER AND WINDS AROUND 40
MILES PER HOUR HAVE BEEN REPORTED IN NORTH MIAMI BEACH. DOPPLER RADAR
INDICATES THAT THE THUNDERSTORMS PRODUCING THE SEVERE WEATHER IS MOVING
SOUTHEAST AND WILL CROSS MIAMI BEACH AND MOVE INTO THE COASTAL WATERS BY
500 PM.
 
 
DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. 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, Sep 12, 10:46 AM EDT, 5 hours 54 minutes before
FLZ068-072-074-502-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1100 AM EST MON JUNE 05 1995

...THUNDERSTORMS AND FREQUENT LIGHTNING THIS AFTERNOON...

WEST WINDS...LOW LEVEL MOISTURE AND VERY WARM TEMPERATURES WILL LEAD
TO NUMEROUS THUNDERSTORMS OVER THE METROPOLITAN AREAS OF
DADE...BROWARD AND PALM BEACH COUNTIES THIS AFTERNOON AND EVENING.

FREQUENT LIGHTNING WILL ACCOMPANY THESE THUNDERSTORMS AND PERSONS
OUTDOORS SHOULD BE ALERT FOR THUNDERSTORMS MOVING TOWARD THEM FROM THE
WEST. YESTERDAY...THREE PERSONS WERE INJURED BY LIGHTNING IN BROWARD
COUNTY MAKING A TOTAL OF 36 PEOPLE STRUCK BY LIGHTNING IN THE THREE
SOUTHEAST FLORIDA COUNTIES SO FAR THIS YEAR. MANY OF THESE VICTIMS
WERE IN UNSAFE LOCATIONS...SUCH AS NEAR A TALL TREE...NEAR WATER AND
STANDING NEXT TO A VEHICLE.

IN ADDITION TO THE LIGHTNING SOME OF THE AFTERNOON THUNDERSTORMS COULD
BE QUITE STRONG WITH VERY GUSTY WINDS AND LOCALLY FLOODING RAINFALL.

Nearby

Severe Thunderstorm Warnings in Florida, 1996Every severe thunderstorm warning in 1996

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.