Alert archive / Florida / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 19, NWS Melbourne, FL

July 20, 1986Marion County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 20, 1986, 6:22 PM EDT for Marion County, Florida. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1986, 6:22 PM EDT (22:22 UTC)
Expired
Jul 20, 1986, 7:30 PM EDT
In force
68 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Marion 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, 10.4 hours before the alert went out and 148 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 1986-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2728 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 1986-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
2728 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1178 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
8 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 202222
SVRDAB
FLC083-202330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
622 PM EDT SUN JUL 20 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 730 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTH CENTRAL FLORIDA...EASTERN MARION

RADAR INDICATED A SEVERE THUNDERSTORM IN EAST MARION COUNTY
MOVING SOUTHWEST 10 MPH.

THIS IS A DANGEROUS STvORM. TAKE COVER IMMEDIATELY !

Nearby

Severe Thunderstorm Warnings in Florida, 1986Every severe thunderstorm warning in 1986

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.