Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 16, NWS Melbourne, FL

June 24, 1990Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 24, 1990, 6:12 PM EDT for Okeechobee County, Saint Lucie County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jun 24, 1990, 6:12 PM EDT (22:12 UTC)
Expired
Jun 24, 1990, 7:15 PM EDT
In force
63 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Okeechobee County, FL, Saint Lucie 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.2 hours before the alert went out and 122 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, Cape Canaveral, FL at 12:00Z on 1990-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 511 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, Cape Canaveral, FL at 12:00Z on 1990-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
511 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
746 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
36 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 KPBI 242209
SVRPBI
FLC093-111-242315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
612 PM EDT SUN JUN 24 1990
 
THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EDT
FOR
 ...NORTHERN OKEECHOBEE AND WESTERN ST. LUCIE COUNTIES
 
IN SOUTHEAST FLORIDA
 
AT 6PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERST
NORTH OF OKEECHOBEE CITY EXTENDING NORTHEAST INTO THE
EXTREME NORTHWEST CORNER OF ST. LUCIE COUNTY. THIS THUNDERSTORM
IS MOVING TO THE NORTHEAST AT 15 MILES AN HOUR.
 
STRONG GUSTY WINDS...HAIL...FREQUENT LIGHTNING AND HEAVY DOWNPOURS ARE
ASSOCIATED WITH  THIS STORM.
 
PERSON IN NORTHERN OKEECHOBEE AND WESTERN ST. LUCIE COUNTIES SHOULD
REMAIN ALERT FOR THIS STORM DURING THE NEXT HOUR. IF THREATENING WEATH
APPROACHES SEEK SAFE SHELTER.
 
 
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU S9HOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 6:01 PM EDTTornado WarningMLBBrevard29 min

Nearby

Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990

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.