Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 49, NWS Melbourne, FL

August 30, 1990Flagler County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 30, 1990, 1:57 PM EDT for Flagler County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Aug 30, 1990, 1:57 PM EDT (17:57 UTC)
Expired
Aug 30, 1990, 3:00 PM EDT
In force
63 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Flagler 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, 6.0 hours before the alert went out and 121 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 1990-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 389 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 1990-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.193958Sfc1 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
389 J/kg
Mixed-layer CIN
-258 J/kg
Mixed-layer LCL
1882 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-10 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 KDAB 301759
SVRDAB
FLC035-301900-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
157 PM EDT THU AUG 30 1990
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST FLORIDA
 
   ...FLAGLER COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
A SEVERE THUNDERSTOM WAS INDICATED IN FLAGLER CUNTY EXTENDING FROM BUN
WEST TO THE COUNTY LINE. THIS STORM IS VERY STRONG AND COULD CAUSE
STRONG GUSTY SORFACE WINDS...FREQUENT DANGEROUS CLOUD TO GROUND
LIGHTNING STRIKES...VERY HEAVY RAINFALL AND POSSIBLY HAIL IN EXCELL
OF 3/4 INCH.
 
PERSONS IN FLAGLER COUNTY SHOULD BE ALERT TO THIS STORM AND BE
PREPARED TO SEEK SHELTERAS IT APPROACHES THEIR LOCATION.
 
 
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
DEAVDLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 2:15 PM EDTSevere Thunderstorm WarningMLBVolusia60 min
Aug 30, 4:22 PM EDTSevere Thunderstorm WarningMLBBrevard68 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.