Alert archive / Florida / Tornado Warnings in 1991

Tornado Warning 9, NWS Melbourne, FL

July 15, 1991Seminole County, Florida

NWS Melbourne, FL issued this tornado warning at Jul 15, 1991, 3:26 PM EDT for Seminole County, Florida. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1991, 3:26 PM EDT (19:26 UTC)
Expired
Jul 15, 1991, 4:30 PM EDT
In force
64 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Seminole County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 7.4 hours before the alert went out and 160 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 1991-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1345 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 1991-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 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
1345 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
688 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
94 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 tornado 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, Jul 15, 2:50 PM EDT, 36 minutes before
FLZ011-012-016-017-152045-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
245 PM EDT MON JUL 15 1991

AT 240 PM... THERE WERE NUMEROUS SHOWERS AND THUNDERSTORMS FROM OCALA TO MT
DORA... APOPKA... KISSIMMEE AND THEN SOUTH ALONG THE KISSIMMEE RIVER TO NEAR
LAKE PLACID. SCATTERED SHOWERS AND THUNDERSTORMS ALSO CONTINUED ALONG AND JUST
INLAND FROM THE COAST FROM NEW SMYRNA BEACH SOUTH TO FORT PIERCE. IN BOTH
THESE AREAS... THE THUNDERSTORMS HAD GUSTY WINDS AND HEAVY RAIN.

BETWEEN 3 AND 4 PM... PERSONS IN LOCATIONS FROM OCALA AND ASTOR PARK SOUTH
ACROSS LAKE... ORANGE AND OSCEOLA COUNTIES SHOULD BE PREPARED FOR
THUNDERSTORMS WITH HEAVY RAIN AND GUSTY WINDS. PLEASE SECURE LOOSE OBJECT THAT
COULD BE BLOWN AWAY BY GUSTY WINDS. TAKE PRECAUTIONS TO AVOID BEING CAUGHT
OUTSIDE IN A THUNDERSTORM. MOTORISTS ARE URGED TO SLOW DOWN IN AREAS OF HEAVY
RAIN.

ELSEWHERE... SCATTERED SHOWERS AND THUNDERSTORMS WILL CONoTINUE ALONG THE COAST
FROM DAYTONA BEACH SOUTH WITH OTHER ACTIVITY AFFECTING THE INLAND AREAS OF
EASTERN SEMINOLE AND SOUTHERN VOLUSIA COUNTIES.

LIVINGSTON
Special weather statement, Jul 15, 3:20 PM EDT, 6 minutes before
FLZ009-012-152115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
319 PM EDT MON JUL 15 1991

THIS IS A SPECIAL WEATHER STATEMENT FOR MARION AND VOLUSIA COUNTIES
AND A MARINE WEATHER STATEMENT FOR VOLUSIA COUNTY...

AT 315 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS
INCREASING RAPIDLY IN INTENSITY AND COVERAGE OVER CENTRAL FLORIDA.
THE HEAVIEST CONCENTRATIONS OF STORMS EXTENDED DOWN THE INTERIOR OF
THE STATE FROM SOUTHEAST MARION COUNTY NEAR THE OKLAWAHA RIVER AND
ALONG THE EAST COAST SOUTH OF NEW SYRNA BEACH.

THE THUNDERSTORMS WERE MOVING NORTH AT AROUND 10 MPH ON A COURSE
THAT WILL PUSH THEM INTO MARION AND VOLUSIA COUNTIES FOR THE NEXT
ONE TO TWO HOURS.

THESE THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS AND LOCALLY
ROUGH SEAS...FREQUENT DANGEROUS LIGHTNING STRIKES...VERY HEAVY RAINS
...AND POSSIBLY SMALL HAIL.

RESIDENTS...MOTORISTS...AND BOATERS SHOULD BE PREPARED FOR THE
APPROACH OF THESE THUNDERSTORMS AND TAKE NECESSARY PRECAUTIONARY
MEASURES...PAYING CLOSE ATTENTION TO LIGHTNING SAFETY TIPS. BOATERS
MAY BE WELL ADVISED TO HEAD FOR SHORE AT THIS TIME.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 3:17 PM EDTSevere Thunderstorm WarningMLBOrange58 min
Jul 15, 3:17 PM EDTSevere Thunderstorm WarningMLBLake27 min

Nearby

Tornado Warnings in Florida, 1991Every tornado warning in 1991Tornadoes in 1991

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.