Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Melbourne, FL

March 13, 1993Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 13, 1993, 1:42 AM EST for Orange County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Mar 13, 1993, 1:42 AM EST (06:42 UTC)
Expired
Mar 13, 1993, 2:45 AM EST
In force
63 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Orange County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 6.7 hours before the alert went out and 81 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, Cape Canaveral, FL at 00:00Z on 1993-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 701 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, Cape Canaveral, FL at 00:00Z on 1993-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 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
701 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 130643
SVRMLB
FLC095-130745-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
142 AM EST SAT MAR 13 1993
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL FLORIDA
 
   ...EASTERN ORANGE COUNTY
 
AT 140 AM A SEVERE THUNDERSTORM WAS MOVING ACROSS EASTERN SECTIONS OF
DOWNTOWN ORLANDO. THE ORLANDO INTERNATIONAL AIRPORT REPORTED A WIND GUST
OF 59 MPH AS THIS STORM PASSED. THIS STORM WILL AFFECT ALL AREAS OF
EASTERN ORANGE COUNTY DURING THE NEXT HOUR.
 
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
Mar 13, 12:08 AM ESTTornado WarningMLBLake67 min
Mar 13, 12:37 AM ESTTornado WarningMLBOrange68 min
Mar 13, 12:48 AM ESTTornado WarningMLBSeminole57 min
Mar 13, 1:05 AM ESTSevere Thunderstorm WarningMLBMarion85 min
Mar 13, 1:05 AM ESTSevere Thunderstorm WarningMLBFlagler, Volusia10 min
Mar 13, 1:05 AM ESTTornado WarningMLBOsceola55 min
Mar 13, 1:15 AM ESTTornado WarningMLBFlagler, Volusia75 min
Mar 13, 1:58 AM ESTSevere Thunderstorm WarningMLBBrevard62 min
Mar 13, 2:00 AM ESTSevere Thunderstorm WarningMLBOsceola60 min
Mar 13, 4:05 AM ESTSevere Thunderstorm WarningMLBIndian River55 min
Mar 13, 4:31 AM ESTSevere Thunderstorm WarningMLBPalm Beach59 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.