Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 18, NWS Melbourne, FL

June 26, 1990Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 26, 1990, 12:53 PM EDT for Volusia County, Florida. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
Jun 26, 1990, 12:53 PM EDT (16:53 UTC)
Expired
Jun 26, 1990, 1:45 PM EDT
In force
52 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, 4.9 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 1990-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 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 1990-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
170 J/kg
Mixed-layer CIN
-229 J/kg
Mixed-layer LCL
1378 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
18 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 261659
SVRDAB
FLC127-261745-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
1253 PM EDT TUE JUN 26 1990
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  145 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL FLORIDA
 
   ...SOUTHEAST VOLUSIA COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
RADAR SHOWS A THUNDERSTORM JUST WEST OF OAK HILL AND NORTH OF
TITUSVILLE. HAIL APPROX 3/4 INCH WAS REPORTED JUST WEST OF OAK HILL
BY A RESIDENT IN THAT AREA.
 
THIS STORM IS SHOWING LITTLE OR NO MOVEMENT BUT SHOULD MOVE SLOWLY
EASTWARD OVER THE COASTAL WATERS OF SOUTH VOLUSIA AND BOATERS SHOULD
BE ALERT AND PREPARED TO TAKE EVASIVE ACTIONS.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 2:35 PM EDTSevere Thunderstorm WarningMLBBrevard55 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.