Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 13, NWS Melbourne, FL

June 11, 1990Palm Beach County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 11, 1990, 5:41 PM EDT for Palm Beach County, Florida. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
Jun 11, 1990, 5:41 PM EDT (21:41 UTC)
Expired
Jun 11, 1990, 6:30 PM EDT
In force
49 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, 9.7 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 1990-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 905 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 1990-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
905 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
850 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
17 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 112146 COR
SVRPBI
FLC099-112230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING...CORRECTED LAST PARA   
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
548 PM EDT MON JUN 11 1990

THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  630 PM EDT
FOR THE FOLLOWING LOCATIONS...

IN SOUTHEAST FLORIDA

   ...EASTERN PALM BEACH COUNTY

  AND FOR BOATERS ON THE WATERS...

   ...JUPITER INLET  TO  PALM BEACH INLET
   ...PALM BEACH INLET  TO  BOYNTON INLET
   ...BOYNTON INLET  TO  BOCA RATON INLET

RADAR SHOWED SEVERE THUNDERSTORMS OVER LAKE WORTH AND IN THE COASTAL
WATERS 10 MILES EAST OF WEST PALM BEACH.
THE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AT 30 MPH.


THESE ARE DANGEROUS STORMS.  IF YOU ARE IN THE 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

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 2:30 PM EDTSevere Thunderstorm WarningMLBLake60 min
Jun 11, 4:16 PM EDTSevere Thunderstorm WarningMLBOsceola59 min
Jun 11, 4:44 PM EDTSevere Thunderstorm WarningMLBOkeechobee, Saint Lucie46 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.