Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 8, NWS Melbourne, FL

June 4, 1990Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 4, 1990, 6:34 PM EDT for Saint Lucie County, Florida. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jun 4, 1990, 6:34 PM EDT (22:34 UTC)
Expired
Jun 4, 1990, 7:30 PM EDT
In force
56 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Saint Lucie County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.6 hours before the alert went out and 121 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 12:00Z on 1990-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 928 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 12:00Z on 1990-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
928 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
-18 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, Jun 4, 4:36 PM EDT, 1 hour 58 minutes before
FLZ012-042200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
435 PM EDT MON JUN 4 1990

THIS IS A SPECIAL WEATHER STATEMENT FOR FLAGLER AND VOLUSIA COUNTIES AND
THEIR ADJACENT COASTAL WATERS...

AT 435 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED VERY STRONG THUNDERSTORMS
CAPABLE OF PRODUCING STRONG GUSTY WINDS...FREQUENT DANGEROUS LIGHTNING STRIKES
...POSSIBLY SMALL HAIL...AND VERY HEAVY RAINFALL AMOUNTS...EXTENDING FROM THE
COASTAL WATERS OF FLAGLER COUNTY INTO THE THE NORTHWEST CORNER OF VOLUSIA
COUNTY NEAR LAKE GEORGE.

THESE THUNDERSTORM WILL MOVE EAST AT AROUND 10 MPH.

PERSONS IN THE AFFECTED AREA SHOULD BE PREPARED FOR THE APPROACH OF THESE
THUNDERSTORMS AND AND BE PREPARED TO SEEK SAFE SHELTER IMMEDIATELY. BOATERS
OVER THE ATLANTIC AND INTRACOASTAL WATERWAYS ALONG FLAGLER AND VOLUSIA
COUNTIES EAST COAST...SHOULD EXPECT LOCALLY ROUGH SEAS AND STRONG GUSTY WINDS
TO ACCOMPANY THESE THUNDERSTORMS FOR THE NEXT HOUR OR SO.
Special weather statement, Jun 4, 4:47 PM EDT, 1 hour 47 minutes before
FLZ017-011-016-012-042245-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
445 PM EDT MON JUN 4 1990

AT 445 PM STRONG THUNDERSTORMS WERE ALONG THE COAST FROM NORTH OF
DAYTONA INTO FLAGLER COUNTY. THESE THUNDERSTORMS WILL LIKELY PRODUCE
STRONG GUSTY WINDS FREQUENT DANGEROUS LIGHTNING...HEAVY
DOWNPOURS AND POSSIBLE SMALL HAIL.

OTHER THUNDERSTORMS WERE ACTIVE ALONG THE COAST FROM CAPE CANAVERAL TO
MELBOURNE TO NEAR VERO BEACH. THUNDERSTORMS WERE ALSO INLAND FROM NEAR
KISSIMMEE WEST AND SOUTH INTO POLK COUNTY.

ALL THUNDERSTORMS WERE MOVING EAST AT 15 MPH.

DURING THE NEXT 2 HOURS THUNDERSTORMS WILL CONTINUE TO INCREASE OVER
MUCH OF CENTRAL FLORIDA ESPECIALLY ALONG THE EAST COAST AND WILL
LIKELY DRIFT OVER THE ADJACENT COASTAL WATERS.
Special weather statement, Jun 4, 5:37 PM EDT, 57 minutes before
FLZ017-011-016-042330-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
534 PM EDT MON JUN 4 1990

AT 530 PM STRONG THUNDERSTORMS CONTINUED MAINLY FROM THE COAST SOUTH
OF NEW SMYRNA BEACH INLAND TO ALTAMONTE SPRINGS. OTHER STRONG
THUNDERSTORMS WERE JUST SOUTH OF MELBOURNE INLAND ACROSS SOUTHERN
OSCEOLA COUNTY. THESE THUNDERSTORMS ARE LIKELY TO PRODUCE FREQUENT
DANGEROUS LIGHTINING... STRONG GUSTY WINDS...VERY [HEAVY RAIN AND
POSSILBLE SMALL HAIL.

DURING THE NEXT COUPLE OF HOURS THUNDERSTORMS WILL CONTINUE TO
DEVELOP OVER PARTS OF CENTRAL FLORIDA PARTICULARLY OVER THE ORLANDO
METROPOLITAN AREA.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 4:37 PM EDTTornado WarningMLBPalm Beach53 min
Jun 4, 5:30 PM EDTSevere Thunderstorm WarningMLBPalm Beach60 min
Jun 4, 6:12 PM EDTSevere Thunderstorm WarningMLBIndian River33 min

Nearby

Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990

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.