Alert archive / Florida / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 2, NWS Melbourne, FL

February 21, 1989Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Feb 21, 1989, 4:45 PM EST for Brevard County, Florida. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Feb 21, 1989, 4:45 PM EST (21:45 UTC)
Expired
Feb 21, 1989, 5:47 PM EST
In force
62 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Brevard 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, 9.8 hours before the alert went out and 180 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 1989-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 927 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, Tampa Bay, FL at 12:00Z on 1989-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.1939587897Sfc1 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
927 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDAB 212147
SVRDAB
FLC009-212247-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
445 PM EST TUE FEB 21 1989
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN EAST CENTRAL FLORIDA
          ...NORTHERN BREVARD
 
AT 445PM A SEVERE THUNDERSTORM WAS MOVING ACROSS BREVARD COUNTY IN THE
VICINITY OF COCOA..MOVING NORTHEAST AT 35 MPH.
 
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 INSI^DE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

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, Feb 21, 3:40 PM EST, 1 hour 5 minutes before
SEVERE WEATHER STATEMENT RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
335 PM EST TUE FEB 21 1989

A SEVERE THUNDERSTORMS WARNING IS IN EFFECT FOR VOLUSIA COUNTY
UNTIL 425 PM EST...

VERY STRONG THUNDERSTORMS WERE MOVING INTO WEST VOLUSIA COUNTY
AND EXTENDED NORTHWARD TO THE GEORGIA BORDER.
CANAVERAL.

SHOWERS AND THUNDERSTORMS COVERED MUCH OF THE FLORIDA PENINSULA FROM
SARASOTA AND AVON PARK NORTHWARD.

MOVEMENT WAS NORTHEAST 35 MILES+ AN HOUR.
Local storm report, Feb 21, 4:42 PM EST, 3 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
430 PM EST TUE FEB 21 1989

TIME         EVENT
412 PM EST  HIGH WINDS IN VOLUSIA COUNTY FLORIDA...FEB 21 1989.
            REPORT OF 3/4 TO 1 INCH HAIL WAS REPORTED IN DAYTONA
            BEACH WITH SOME MINOR DAMAGE TO RESIDENCE.

            THE STRONGEST WIND RECORDED AT DAYTONA BEACH REGIONAL
            AIRPORT WAS 49 MPH AT 402 PM EST.

235PM PM EST HIGH WINDS IN OCALA FLORIDA..S\EVERAL TREES AND POWERLINES
             DOWN.. DAMAGE TO MOBILE HOMES..BILL BOARDS DOWNS. GOLF BALL
             SIZE HAIL IN OCALA .

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 3:00 PM ESTTornado WarningMLBMarion45 min
Feb 21, 3:25 PM ESTSevere Thunderstorm WarningMLBVolusia60 min

Nearby

Severe Thunderstorm Warnings in Florida, 1989Every severe thunderstorm warning in 1989

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.