Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 15, NWS Melbourne, FL

June 23, 1990Palm Beach County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 23, 1990, 6:05 PM EDT for Palm Beach County, Florida. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Jun 23, 1990, 6:05 PM EDT (22:05 UTC)
Expired
Jun 23, 1990, 7:00 PM EDT
In force
55 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Palm Beach 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, 10.1 hours before the alert went out and 203 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 1990-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1900 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 1990-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
1900 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
553 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
114 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 232204
SVRPBI
FLC099-232300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
605 PM EDT SAT JUN 23 1990
 
THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM EDT
FOR THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST FLORIDA
 
   ...CENTRAL...NORTH CENTRAL AND NORTHEAST PALM BEACH COUNTY
 
AND THE ADJACANT COASTAL WATERS.
 
 
AT 605PM EDT WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
EAST OF BELLE GLADE NEAR 20 MILE BEND. THIS THUNDERSTORM IS MOVING
NORTHEAST AT 15 MILES AN HOUR.
 
RESIDENTS IN CENTRAL...NORTH CENTRAL AND NORTHEAST PALM BEACH COUNTY
SHOULD BE ALERT FOR THIS STORM FOR THE NEXT HOUR.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
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

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.