Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 4, NWS Miami, FL

July 6, 1992Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 6, 1992, 4:42 PM EDT for Miami-Dade County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued: Jul 6, 1992, 4:42 PM EDT (20:42 UTC)
Expired: Jul 6, 1992, 5:45 PM EDT
In force: 63 min
Issued by: NWS Miami, FL
Area: Whole counties

County Miami-Dade County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 8.7 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2916 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: -22 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 062040 RRA
SVRMIA
FLC025-062145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
442 PM EDT MON JUL 6 1992
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST FLORIDA
 
   ...EASTERN DADE COUNTY
 
AND THE ADJACENT COASTAL WATERS ALONG THE SOUTHEAST FLORIDA COAST
AND THE ADJACENT COASTAL WATERS
 
AT 430 PM STRONG THUNDERSTORMS WERE IN PROGRESS THROUGHOUT MUCH OF
EASTERN DADE COUNTY. THERE IS AN UNCONFIRMED REPORT OF THUNDERSTORMS
WINDS DAMAGINA A HOUSE IN NORTH DADE COUNTY DURING THE PAST FEW
MINUTES.
 
DAMAGING WIND...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. A MOBILE HOME IS NOT A SAFE REFUGE FROM A
SEVERE THUNDERSTORM.~..MOVE TO A MORE SUBSTANTIAL BUILDING.
 
IF THREATENING WEATHER IS SIGHTED...TAKE SHELTER...THEN ASK A LAW
ENFORCEMENT AGENCY TO RELAY YOUR SEVERE WEATHER REPORT 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, Jul 6, 4:08 PM EDT, 34 minutes before

FLZ022-062115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
409 PM EDT MON JUL 6 1992

AT 405 PM EDT A STRONG THUNDERSTORM WAS LOCATED OVER SOUTHEAST DADE
COUNTY NEAR HOMESTEAD AND WAS MOVING TOWARD THE EAST NORTHEAST AT 14
MPH. THIS THUNDERSTORM IS PRODUCING NUMEROUS CLOUD TO GROUND LIGHTNING
STRIKES...SMALL HAIL AND VERY GUSTY WINDS. PERSONS IN SOUTHEAST DADE
COUNTY SHOULD BE ALERT FOR THREATENING WEATHER AND MOVE INSIDE IF IT
APPROACHES.

Special weather statement, Jul 6, 4:40 PM EDT, 2 minutes before

FLZ015>023-062140-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION
NATIONAL WEATHER SERVICE MIAMI FL
440 PM EDT MON JUL 6 1992

      ...STRONG THUNDERSTORMS DEVELOPING OVER DADE COUNTY...

AT 426 PM MIAMI RADAR INDICATED NUMEROUS CLUSTERS OF THUNDERSTORMS WITH VERY
HEAVY RAIN AND POSSIBLE SMALL HAIL DEVELOPING THROUGHOUT DADE COUNTY. MOTORISTS
...RESIDENTS ... AND OTHER CONCERNED INTERESTS SHOULD BE ALERT FOR THESE STORMS
AS THEY WILL BE ACCOMPANIED BY STRONG GUSTY WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING STRIKES...AND SHARPLY REDUCE VISIBILITIES IN PERIODS OF VERY HEAVY
RAINS...PONDING OF WATER ON LOW LYING POOR DRAINAGE ROADWAYS IS ALSO A CONCERN
FOR AFTERNOON RUSH HOUR TRAFFIC.

ELSEWHERE SCATTERED SHOWERS AND THUNDERSTORMS...EXTENDED FROM THE GULF COAST
BETWEEN NAPLES AND CAPE SABLE WEST OVER THE GULF TO THE LOWER FLORIDA KEYS.

MOVEMENT WAS EAST AT 10 TO 15 MILES AN HOUR.

THE MAXIMUM PRECIPITATION TOP WAS 50 THOUSAND FEET ... LOCATED IN SOUTHEAST
DADE COUNTY NEAR HOMESTEAD.

Nearby

Severe Thunderstorm Warnings in Florida, 1992 Every severe thunderstorm warning in 1992

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.