Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 23, NWS Melbourne, FL

March 13, 1993Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 13, 1993, 2:00 AM EST for Osceola County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued: Mar 13, 1993, 2:00 AM EST (07:00 UTC)
Expired: Mar 13, 1993, 3:00 AM EST
In force: 60 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Osceola County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 7.0 hours before the alert went out and 78 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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

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, Mar 12, 11:41 PM EST, 2 hours 19 minutes before

FLZ006>017-020-130525-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
1130 PM EST FRI MAR 12 1993

...A TORNADO WATCH IS IN EFFECT FOR THE FLORIDA PENINSULA UNTIL 700 AM
EST SATURDAY AND INCLUDES MARION COUNTY AS WELL AS FLAGLER AND VOLUSIA
COUNTIES AND THE ADJACENT COASTAL WATERS...

AT 1125 PM EST...DAYTONA BEACH RADAR DETECTED A LINE OF VERY STRONG
THUNDERSTORMS OVER THE GULF COASTAL WATERS FROM JUST OFFSHORE ST PETERSBURG
TO CEDAR KEY.  THIS LINE WAS MOVING EAST AT 50 MPH.

MEANWHILE...RAIN BLANKETED MUCH OF NORTH AND WEST CENTRAL FLORIDA.
THE LEADING EDGE OF THIS AREA OF RAIN EXTENDED FROM LAKELAND TO ASTOR PARK
TO JACKSONVILLE AND WAS MOVING EAS*T AT 50 MPH.

ISOLATED SHOWERS HAD RECENTLY DEVELOPED BETWEEN SANFORD AND MELBOURNE.

Special weather statement, Mar 12, 11:51 PM EST, 2 hours 9 minutes before

FLZ017-011-016-012-009-130545-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
1150 PM EST FRI MAR 12 1993

...LINE OF SEVERE THUNDERSTORMS ONSHORE THE WEST COAST...

AT 1150 PM...A LINE OF SEVERE THUNDERSTORMS WAS JUST MOVING ONSHORE
THE WEST COAST. THERE ARE PRELIMINARY REPORTS OF DAMAGE IN LEVY
COUNTY AROUND THE CHIEFLAND AREA. THE LINE OF STORMS WAS ABOUT
45 MILES WEST OF LEESBURG AND MOVING EAST AT BETTER THAN
50 MPH.

STORMS ARE EXPECTED TO BEGIN AFFECTING LAKE COUNTY BETWEEN
1215 AND 1245 AM.

A TORNADO WATCH IS IN EFFECT FOR ALL OF THE FLORIDA PENINSULA.
PEOPLE ACROSS EAST CENTRAL FLORIDA SHOULD BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITINONS AND BE PREPARED TO SEEK SHELTER AS
THE STORMS APPROACH AND WARNINGS ARE ISSUED.

Local storm report, Mar 13, 1:00 AM EST, 1 hour before

STORM REPORT...PRELIMINARY
NATIONAL WEATHER SERVICE MELBOURNE FL
100 AM EST SAT MAR 13 1993

TIME         LOCATION         REPORT

1230 AM      LAKE COUNTY      TREES AND POWER LINES DOWN IN MT DORA

Local storm report, Mar 13, 1:26 AM EST, 34 minutes before

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Local storm report, Mar 13, 1:35 AM EST, 25 minutes before

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Local storm report, Mar 13, 1:48 AM EST, 12 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 12:08 AM EST	Tornado Warning	MLB	Lake	67 min
Mar 13, 12:37 AM EST	Tornado Warning	MLB	Orange	68 min
Mar 13, 12:48 AM EST	Tornado Warning	MLB	Seminole	57 min
Mar 13, 1:05 AM EST	Severe Thunderstorm Warning	MLB	Marion	85 min
Mar 13, 1:05 AM EST	Severe Thunderstorm Warning	MLB	Flagler, Volusia	10 min
Mar 13, 1:05 AM EST	Tornado Warning	MLB	Osceola	55 min
Mar 13, 1:15 AM EST	Tornado Warning	MLB	Flagler, Volusia	75 min
Mar 13, 1:42 AM EST	Severe Thunderstorm Warning	MLB	Orange	63 min
Mar 13, 1:58 AM EST	Severe Thunderstorm Warning	MLB	Brevard	62 min
Mar 13, 4:05 AM EST	Severe Thunderstorm Warning	MLB	Indian River	55 min
Mar 13, 4:31 AM EST	Severe Thunderstorm Warning	MLB	Palm Beach	59 min

Nearby

Severe Thunderstorm Warnings in Florida, 1993 Every 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.