Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 2, NWS Miami, FL

July 4, 1992Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 4, 1992, 6:20 PM EDT for Collier County, Florida. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1992, 6:20 PM EDT (22:20 UTC)
Expired
Jul 4, 1992, 7:15 PM EDT
In force
55 min
Issued by
NWS Miami, FL
Area
Whole counties

County Collier County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 10.3 hours before the alert went out and 174 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 1992-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1992-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
8 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 042222
SVRMIA
FLC021-042315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
620 PM EDT SAT JUL 4 1992
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST FLORIDA
 
   ...WESTERN COLLIER COUNTY
 
AND THE ADJACENT COASTAL WATERS ALONG THE SOUTHWEST FLORIDA COAST
 
AT 620 PM EDT WEATHER SERVICE RADARS FROM BOTH TAMPA AND MIAMI
OBSERVED A SEVERE THUNDERSTORM ABOUT 10 MILES EAST OF NAPLES. THIS
THUNDERSTORM IS MOVING SOUTH AT 10 TO 15 MPH TOWARDS MARCO ISLAND AND
EVERGLADES CITY.
 
 
THUNDERSTORMS THREATEN BOATER SAFETY WITH GUSTY WINDS OF 35 KNOTS
OR GREATER...ROUGH SEAS AND LIGHTNING.  YOUR BEST COURSE OF ACTION
IS TO SEEK SAFE HARBOR...BUT IF YOU ARE CAUGHT ON THE OPEN WATER...
STAY BELOW DECK AND AWAY FROM UNGROUNDED METAL OBJECTS. MAKE SURE
YOU AND ALL YOUR CREW ARE WEARINDG FLOTATION DEVICES.

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 4, 4:46 PM EDT, 1 hour 34 minutes before
FLZ015>023-042145-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MIAMI FL
445 PM EDT SAT JUL 4 1992

...STRONG THUNDERSTORMS WERE BUILDING OVER EASTERN BROWARD COUNTY...

AT 433 PM RADAR INDICATED CLUSTERS OF THUNDERSTORMS WITH VERY HEAVY RAIN
FORMING OVER THE EASTERN THIRD OF BROWARD COUNTY. THESE THUNDERSTORMS EXTENDED
FROM GOLDEN BEACH IN NORTHERN DADE COUNTY NORTH TO INTERIOR PALM BEACH COUNTY
BETWEEN JUPITER AND THE EASTERN SHORE OF LAKE OKEECHOBEE. MOTORISTS AND OTHER
CONCERNED INTERESTS IN EASTERN BROWARD AND NORTHEASTERN DADE COUNTIES SHOULD BE
ALERT FOR THESE THUNDERSTORMS AS THEY WILL SHARPLY REDUCE VISIBILITIES IN
PERIODS OF VERY HEAVY RAINS...BE ACCOMPANIED BY FREQUENT LIGHTNING STRIKES...
STRONG GUSTY WINDS AND CAUSE PONDING OF WATER ON POOR DRAINAGE ROADWAYS.
DURING THE NEXT FEW HOURS.

ELSEWHERE SCATTERED SHOWERS AND THUNDERSTORMS WERE OVER THE WEST CENTRAL AREAS
OF THE STATE FROM CAPE ROMANO NORTHEAST TO THE WESTERN SHORE OF LAKE OKEECHOBEE
AND OVER PUNTA GORDA.

THESE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTH AT ABOUT 15 MILE AN HOUR.

OTHER SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...WERE
OVER THE ATLANTIC FROM THE BIMINI ISLANDS TO THE BERRY ISLANDS AND ANDROS
ISLAND AND BEYOND 125 MILES FROM THE MIAMI RADAR.

THIS AREA OF SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHWEST AT 10 TO 15
MILES AN HOUR.

THE MAXIMUM PRECIPITATION TOP WAS 47 THOUSAND FEET ...v LOCATED OVER THE
CITY OF FORT LAUDERDALE.
Special weather statement, Jul 4, 5:13 PM EDT, 1 hour 7 minutes before
FLZ020-019-042315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
513 PM EDT SAT JUL 4 1992

AT 5:10 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED VERY STRONG
THUNDERSTORMS OVER CERNTRAL PALM BEACH COUNTY IN THE AREA OF
WELLINGTON. THESE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AT 10
TO 15 MILES AN HOUR.

THESE THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS...FREQUENT
DANGEROUS CLOUD TO GROUND LIGHTNING...VERY HEAVY DOWNPOURS...REDUCED
VISIBILITIES AND THE PONDING OF WATER ON ROADWAYS.

RESIDENTS AND MOTORISTS TRAVELING IN CENTRAL AND EASTERN PALM BEACH
COUNTY SHOULD BE ALERT TO THESE THUNDERSTORM OVER THE NEXT ONE TO
TWO HOURS. IF THREATENING WEATHER APPROACHES YOUR LOCATION SEEK A
SAFE SHELTER IMMEDIATELY. MOTORISTS ARE URGED TO USE CAUTION AND
SLOW DOWN AND ALLOW EXTRA TIME TO REACH THEIR DESTINATIONS SAFELY.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL TV OR RADIO STATION
FOR FURTHER STATEMENTS AND OR WARNINGS SHOULD THEY BECOME NECESSARY.

NNNN
Special weather statement, Jul 4, 5:46 PM EDT, 34 minutes before
FLZ015>023-042245-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MIAMI FL
545 PM EDT SAT JUL 4 1992

...STRONG THUNDERSTORMS CONTINUE BUILDING OVER BOTH GULF AND ATLANTIC COASTS
    OF SOUTHERN PENINSULA...

AT 531 PM RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS OVER COLLIER COUNTY
ABOUT 10 MILES EAST OF NAPLES... OTHER STRONG THUNDERSTORMS WERE FORMING OVER
THE PENINSULA NORTH OF A EVERGLADES CITY/CITY OF MIAMI LINE... RESIDENTS AND
MOTORISTS ON SOUTH FLORIDA ROADWAYS CAN EXPECT SHARPLY REDUCED VISIBILITIES IN
PERIODS OF LOCALLY HEAVY RAINFALL...FREQUENT CLOUD TO GROUND LIGHTNING STRIKES
AND SMALL HAIL IS ALSO POSSILBE WITH THE STRONGER THUNDERSTORMS...ROADWAYS
COULD ALSO ACCUMULATE POCKETS OF STANDING WATER IN LOW LYING POOR DRAINAGE
LOCATIONS...STRONG GUSTY WINDS WILL ALSO BE ACCOMPANING THESE THUNDERSTORMS.

ELSEWHERE...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER THE ATLANTIC
FROM THE BIMINI ISLANDS EAST TO BEYOND 125 MILES FROM THE MIAMI RADAR

THUNDERSTORM MOVEMENT WAS SOUTH AT 10 TO 15 MILES AN HOUR.

THE MAXIMUM PRECIPITATION TOP WAS 57 THOUSAND FEET ... LOCATED OVER COLLIER
COUNTY 10 MILES EAST OF NAPLES.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 5:50 PM EDTSevere Thunderstorm WarningMFLMiami-Dade55 min
Jul 4, 7:03 PM EDTSevere Thunderstorm WarningMFLMiami-Dade42 min

Nearby

Severe Thunderstorm Warnings in Florida, 1992Every 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.