Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 96, NWS Melbourne, FL

August 13, 1993Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 13, 1993, 6:22 PM EDT for Volusia County, Florida. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Aug 13, 1993, 6:22 PM EDT (22:22 UTC)
Expired
Aug 13, 1993, 7:30 PM EDT
In force
68 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 22:22 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 10.4 hours before the alert went out and 194 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 12:00Z on 1993-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 981 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 12:00Z on 1993-08-13The 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
981 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1013 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 13, 6:02 PM EDT, 20 minutes before
FLZ009-011-012-016-017-501-132300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
557 PM EDT FRI AUG 13 1993

...A LINE OF STRONG THUNDERSTORMS DEVELOPING ACROSS EAST CENTRAL
FLORIDA...

AT 555 PM THIS EVENING NATIONAL WEATHER SERVICE RADAR IS INDICATING
A LINE OF INTENSIFYING THUNDERSTORMS WHICH EXTEND FROM GENEVA...
TO THE ORLANDO INTERNATIONAL AIRPORT AND THEN SOUTHWARD TO
KISSIMMEE. PRESENT INDICATIONS ARE THAT THESE THUNDERSTORMS WILL
CONTINUE TO INTENSIFY AS THEY MOVE SLOWLY TO THE EAST AT 10 MPH.

RESIDENTS SHOULD BE ALERT FOR THESE THUNDERSTORMS MOVE ACROSS
EASTERN ORANGE...EASTERN SEMINOLE AND OSCEOLA COUNTIES. THEY CAN
PRODUCE DANGEROUS CLOUD TO GROUND LIGHTNING...HEAVY RAIN...STRONG
GUSTY WINDS AND POSSIBLY SMALL HAIL. RESIDENTS SHOULD MONITOR NOAA
WEATHER RADIO OR LOCAL RADIO OR TELEVISION STATIONS FOR LATER
STATEMENTS OR POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 7:29 PM EDTSevere Thunderstorm WarningMLBBrevard46 min
Aug 13, 7:59 PM EDTSevere Thunderstorm WarningMLBBrevard61 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; radar from the NEXRAD Level II archive.