Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 9, NWS Melbourne, FL

June 7, 1990Okeechobee County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 7, 1990, 3:15 PM EDT for Okeechobee County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jun 7, 1990, 3:15 PM EDT (19:15 UTC)
Expired
Jun 7, 1990, 4:15 PM EDT
In force
60 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Okeechobee 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.3 hours before the alert went out and 153 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, Tampa Bay, FL at 12:00Z on 1990-06-07Temperature 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, Tampa Bay, FL at 12:00Z on 1990-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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 071914
SVRPBI
FLC093-072015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
315 PM EDT THU JUN 7 1990
 
THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  415 PM EDT
FOR THE FOLLOWING LOCATIONS...
 
IN SOUTH FLORIDA
 
   ...OKEECHOBEE COUNTY
 
  AND FOR BOATERS ON THE WATERS...
 
  ...OF LAKE OKEECHOBEE
 
WEATHER RADAR INDICATES A BAND OF STRONG THUNDERSTORMS OVER EASTERN
OKEECHOBEE COUNTY MOVING SLOWLY TO THE WEST AT LESS THAN 10 MILES AN
HOUR.
 
BOATERS ON LAKE OKEECHOBEE SHOULD SEEK SAFE HARBOR AT THESE
THUNDERSTORMS PASS THROUGH THE AREA.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
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.