Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 39, NWS Melbourne, FL

April 5, 1993Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 5, 1993, 4:44 AM EDT for Osceola County, Florida. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Apr 5, 1993, 4:44 AM EDT (08:44 UTC)
Expired
Apr 5, 1993, 5:45 AM EDT
In force
61 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Osceola County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 00:00Z, 8.7 hours before the alert went out and 129 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 00:00Z on 1993-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 00:00Z on 1993-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.19395878Sfc1 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
10 J/kg
Mixed-layer CIN
-234 J/kg
Mixed-layer LCL
1554 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 050843 RRA
SVRMLB
FLC097-050945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
444 AM EDT MON APR 5 1993
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL FLORIDA
 
   ...SOUTHERN OSCEOLA COUNTY
 
AT 443 AM A SEVERE THUNDERSTOM WAS ENTERING THE SOUTHWEST PART OF
OSCEOLA COUNTY. THIS STORM WILL MOVE NEAR KENANSVILLE AND YEHAW
JUNCTION.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE READY TO GO
TO A SAFE PLACE IF SEVERE THUNDERSTORMS MOVE TOWARD YOUR AREA,
ESPECIALLY IF YOU LIVE IN A MOBILE HOME.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 4:37 AM EDTSevere Thunderstorm WarningMLBMartin, Okeechobee, Palm Beach, Saint Lucie68 min
Apr 5, 4:55 AM EDTTornado WarningMLBMartin, Palm Beach50 min
Apr 5, 4:55 AM EDTTornado WarningMLBOkeechobee, Saint Lucie50 min
Apr 5, 5:20 AM EDTSevere Thunderstorm WarningMLBBrevard40 min

Nearby

Severe Thunderstorm Warnings in Florida, 1993Every severe thunderstorm warning in 1993

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.