Alert archive / Florida / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 13, NWS Miami, FL

June 4, 1991Broward County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 4, 1991, 5:21 PM EDT for Broward County, Florida. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Jun 4, 1991, 5:21 PM EDT (21:21 UTC)
Expired
Jun 4, 1991, 6:30 PM EDT
In force
69 min
Issued by
NWS Miami, FL
Area
Whole counties

County Broward County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 9.4 hours before the alert went out and 218 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 1991-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2005 joules per kilogram.LCLEL10008507005003002001001 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 1991-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
2005 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
817 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
1 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 042124
SVRMIA
FLC011-042230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
521 PM EDT TUE JUN 4 1991
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST FLORIDA
 
   ...NORTHEASTERN BROWARD COUNTY
 
AND THE ADJACENT COASTAL WATERS ALONG THE SOUTHEAST FLORIDA COAST
FROM DEERFIELD BEACH TO PORT EVERGLADES.
 
RADAR INDICATES A SEVERE THUNDERSTORM OVER NORTHEAST BROWARD COUNTY IN
THE DEERFIELD BEACH, POMPANO BEACH, NORTH LAUDERDALE AND OAKLAND PARK
REGION. SOME TREE DAMAGE WAS REPORTED IN THE NORTH FORT LAUDERDALE
AREA AT 5:10 PM.
 
THE THUNDERSTORM IS MOVING SLOWLY EASTWARD.
 
BOATERS IN WARNED AREA SHOULD BE ALERT FOR STRONG GUSTY WINDS AND
ROUGH SEAS AS THIS THUNDERSTORM MOVES EASTWARD OFF SHORE.
 
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.

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, Jun 4, 3:52 PM EDT, 1 hour 29 minutes before
FLZ016-042100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
355 PM EDT TUE JUN 4 1991

AT 355PM EDT...WEATHER SERVICE RADAR INDICATED STRONG
THUNDERSTORMS WITH HEAVY RAINS OVER NORTHERN OKEECHOBEE
COUNTY.  THESE THUNDERSTORMS ARE MOVING TO THE EAST
ABOUT 15 MILES AN HOUR.

PERSONS IN NORTHERN OKEECHOBEE COUNTY SHOULD BE ALERT FOR
STRONG GUSTY WINDS AND HEAVY RAINS WITH THESE STORMS DURING
THE NEXT HOUR OR SO.

 ,
NNNN
Special weather statement, Jun 4, 4:07 PM EDT, 1 hour 14 minutes before
FLZ020-042215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
407 PM EDT TUE JUN 4 1991

AT 4PM EDT...WEATHER SERVICE RADAR INDICATED STRONG
THUNDERSTORMS WITH HEAVY RAINS IN OV

Nearby

Severe Thunderstorm Warnings in Florida, 1991Every severe thunderstorm warning in 1991

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.