Alert archive / Florida / Tornado Warnings in 1987

Tornado Warning 6, NWS Melbourne, FL

August 21, 1987Volusia County, Florida

NWS Melbourne, FL issued this tornado warning at Aug 21, 1987, 10:34 AM EDT for Volusia County, Florida. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Aug 21, 1987, 10:34 AM EDT (14:34 UTC)
Expired
Aug 21, 1987, 11:30 AM EDT
In force
56 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Volusia 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

Jacksonville, FL (KAYS), launched 12:00Z, 2.6 hours before the alert went out and 168 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, Jacksonville, FL at 12:00Z on 1987-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 795 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, Jacksonville, FL at 12:00Z on 1987-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
795 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
1 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 KDAB 211434
TORDAB
FLC127-211530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
1034 AM EDT FRI AUG 21 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO AND SPECIAL 
MARINE WARNING EFFECTIVE UNTIL 1130 AM EDT FOR PEOPLE IN THE 
FOLLOWING COUNTY OF

EAST CENTRAL FLORIDA...EASTERN VOLUSIA
...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTY JUST MENTIONED

A TORNDAO OR WATERSPOUT HAS BEEN REPORTED AT  1030 AM AT THE
PONCE DE LEON INLET JETTIES MOVING INLAND.

PERSONS NEAR THE INLET SHOULD BE ON THE ALERT FOR A POSSIBLE
TORANDO DURING THE NEXT HOUR.

IF YOU ARE IN THE PATH OF THIS TORNADO...GO TO A REINFORCED
SHELTER OR A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON
CARS AND MOBILE HOMES FOR A REINFORCED BUILDING.

Nearby

Tornado Warnings in Florida, 1987Every tornado warning in 1987Tornadoes in 1987

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.