Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 11, NWS Melbourne, FL

February 22, 1993Okeechobee County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Feb 22, 1993, 6:00 PM EST for Okeechobee County, Florida. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Feb 22, 1993, 6:00 PM EST (23:00 UTC)
Expired
Feb 22, 1993, 6:45 PM EST
In force
45 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Okeechobee County, FL

The radar

The Melbourne radar (KMLB), 84 km from the middle of the area, began a volume at 23:02 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, 11.0 hours before the alert went out and 153 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 1993-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 926 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 1993-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.1939587897117Sfc1 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
926 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
648 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
263 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

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, Feb 22, 12:12 PM EST, 5 hours 48 minutes before
FLZ017-011-016-221815-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
1210 PM EST MON FEB 22 1993

...SEVERE THUNDERSTORM WATCH FOR EAST CENTRAL FLORIDA UNTIL 7 PM...

AT 1210 PM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM ABOUT
FLAGLER BEACH ACROSS LAKE GEORGE TO THE WEST COAST BETWEEN CRYSTAL
RIVER AND NEW PORT RICHEY. THUNDERSTORMS WERE MOVING EAST AT 40 MPH
...WHILE THE LINE WAS SLIDING SOUTHEAST AT ABOUT 10 MPH.

THE OUTLOOK THROUGH 2 PM...THIS LINE OF STORMS SHOULD AFFECT AREAS
FROM AROUND DAYTONA BEACH ACROSS THE OCALA NATIONAL FOREST TO
LEESBURG.

A SEVERE THUNDERSTORM WATCH MEAN CONDITIONS ARE FAVORABLE FOR
DAMAGING WINDS AND HAIL IN SO~ME OF THE THUNDERSTORMS. PEOPLE SHOULD
KEEP ABREAST OF THE LATEST STATEMENTS AND POSSIBLE WARNINGS AS THE LINE
OF THUNDERSTORMS MOVES ACROSS EAST CENTRAL FLORIDA.
Special weather statement, Feb 22, 1:20 PM EST, 4 hours 40 minutes before
FLZ011-016-017-221915

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
115 PM EST MON FEB 22 1993

...STRONG THUNDERSTORMS BEGINNING TO AFFECT LAKE COUNTY...

AT 115 PM...A LINE OF THUNDERSTORMS EXTENDED FROM NEAR ORMOND BEACH ACROSS THE
OCALA NATIONAL FOREST TO NEAR LEESBURG. THE THUNDERSTORMS WERE MOVING
NORTHEAST AT 40 TO 45 MPH WHILE THE LINE WAS MOVING SOUTHEAST AT ABOUT 10 MPH.
THE THUNDERSTORMS WITH THE HEAVIEST RAIN AT THIS TIME WERE FROM AROUND
UMATILLA TO SOUTHWEST OF LEESBURG.

THOSE ACROSS LAKE COUNTY SHOULD BE ESPECIALLY ALERT DURING THE NEXT HOUR OR SO
AS THESE THUNDERSTORMS MOVE RAPIDLY THROUGH.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNPTIL 7 PM...THEREFORE PEOPLE ACROSS
ALL OF EAST CENTRAL FLORIDA SHOULD BE ALERT FOR THREATENING WEATHER AS THIS
LINE OF THUNDERSTORMS SLIDES SOUTHEASTWARD ACROSS THE AREA.
Special weather statement, Feb 22, 1:31 PM EST, 4 hours 29 minutes before
FLZ006>017-020-221930-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
130 PM EST MON FEB 22 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF CENTRAL
FLORIDA AND THE ADJACENT COASTAL WATERS UNTIL 700 PM...AND
INCLUDES VOLUSIA COUNTY...

STRONG THUNDERSTORMS CONTINUED OVER CENTRAL FLORIDA...REACHING
FROM THE EAST COAST JUST NORTH OF DAYTONA BEACH...INTO THE
INTERIOR AROUND LEESBURG...AND CONTINUING TO THE GULF COAST
NORTH OF TAMPA.

THESE THUNDERSTORMS ALSO EXTENDED NORTHEAST OVER THE COASTAL AND
OFFSHORE WATERS BETWEEN DAYTONA BEACH AND MARINELAND.

THE HEAVIEST RAINFALL WAS OVER THE INTERIOR JUST EAST OF LEESBURG.

THESE THUNDERSTORMS WERE INCLUDED IN A LARGE AREA OF RAIN THAT
COVERED A GOOD PART OF NORTH FLORIDA.

THUNDERSTORMS HAVE DEVELOPED FARTHER SOUTH ALONG THE EAST COAST
BETWEEN VERO BEACH AND MELBOURNE.

THE THUNDERSTORMS WERE MOVING RAPIDLY EAST AT 45 MPH...WHILE THE
RAIN AREA WAS SLIPPING SOUTHEAST INTO THE CENTRAL PART OF THE
FLORIDA PENINUSLA AT 10 MPH.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA.  PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
Special weather statement, Feb 22, 3:45 PM EST, 2 hours 15 minutes before
FLZ006>017-020-222140-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
340 PM EST MON FEB 22 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF CENTRAL
FLORIDA AND THE ADJACENT COASTAL WATERS UNTIL 700 PM...AND
INCLUDES VOLUSIA COUNTY...

THUNDERSTORMS CONTINUED OVER CENTRAL FLORIDA...REACHING FROM
THE EAST COAST OVER CAPE CANAVERAL...INTO THE INTERIOR SOUTH
OF ORLANDO AND LAKELAND...CONTINUING TO THE GULF COAST JUST
SOUTH OF TAMPA.

THESE THUNDERSTORMS ALSO EXTENDED OVER THE COASTAL AND OFFSHORE
WATERS...NORTHEAST THROUGH SOUTHEAST OF CAPE CANAVERAL.

THE HEAVIEST RAINFALL WAS OVER CAPE CANAVERAL...NEAR THE KENNEDY
SPACE CENTER.

THESE THUNDERSTORMS WERE INCLUDED IN A LARGE AREA OF RAIN THAT
COVERED A GOOD PART OF NORTHEAST AND CENTRAL FLORIDA AND THE
ADJACENT COASTAL WATERS.

THE THUNDERSTORMS WERE MOVING RAPIDLY EAST AT 40 MPH...WHILE THE
RAIN AREA WAS SLIPPING SOUTHEAST AT 10 MPH.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA.  PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITION	S AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
Special weather statement, Feb 22, 4:52 PM EST, 1 hour 8 minutes before
FLZ006>017-020-222240-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
440 PM EST MON FEB 22 1993

...THE SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR A
PORTION OF CENTRAL FLORIDA WHICH INCLUDES ALL OF VOLUSIA COUNTY
AND THE ADJACENT COASTAL WATERS.

AT 425 PM EST...RADAR DETECTED A NARROW BAND OF THUNDERSTORMS WITH
VERY HEAVY RAIN FROM WAUCHULA TO MELBOURNE...SEAWARD TO 40 MILES
OFFSHORE CAPE CANAVERAL.

THE THUNDERSTORMS WERE INCLUDED IN AN AREA OF RAIN WITH THE NORTHERN
FRINGE EXTENDING FROM TAMPA TO SANFORD TO DAYTONA BEACH. RAIN BLANKETED
MUCH OF THE ATLANTIC OCEAN BETWEEN MELBOURNE AND FERNANDINA BEACH AND
LINGERED INLAND TO JACKSONVILLE.

THE AREA OF RAIN AND THUNDERSTORMS WAS DRIFTING SOUTHEAST AT 10 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 22, 1:22 PM ESTSevere Thunderstorm WarningMLBLake68 min
Feb 22, 1:54 PM ESTSevere Thunderstorm WarningMLBOrange, Seminole66 min
Feb 22, 2:10 PM ESTSevere Thunderstorm WarningMLBVolusia65 min
Feb 22, 5:36 PM ESTSevere Thunderstorm WarningMLBMartin, Saint Lucie54 min
Feb 22, 6:46 PM ESTSevere Thunderstorm WarningMLBMartin, Okeechobee, Saint Lucie44 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.