Alert archive / Florida / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 8, NWS Melbourne, FL

July 12, 1987Brevard County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 12, 1987, 4:11 PM EDT for Brevard County, Volusia County, Florida. It was in force for 49 min.

The area

The counties it named.

The facts

Issued
Jul 12, 1987, 4:11 PM EDT (20:11 UTC)
Expired
Jul 12, 1987, 5:00 PM EDT
In force
49 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Brevard County, FL, Volusia 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

Tampa Bay, FL (KTBW), launched 12:00Z, 8.2 hours before the alert went out and 181 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 1987-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1987-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDAB 122011
SVRDAB
FLC127-009-122100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
411 PM EDT SUN JUL 12 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND 
SPECIAL MARINE WARNING EFFECTIVE UNTIL 500 PM EDT FOR PEOPLE IN THE 
FOLLOWING COUNTIES OF

EAST CENTRAL FLORIDA...SOUTHEAST VOLUSIA AND NORTHEAST BREVARD
...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTIES JUST MENTIONED

AT 405 PM EDT RADAR INDICATED SEVERE THUNDERSTORMS OVER
SOUTHEAST VOLUSIA COUNTY JUST WEST OF OAK HILL AND ALONG AND
JUST OFFSHORE THE CANAVERAL NATIONAL SEAHSORE PARK BETWEEN
NEW SMYRNA BEACH AND PORT CANAVERAL.

IF YOU ARE IN OR NEAR THE WARNED AREA GET TO A REINFORCED SHELTER
AND PREPARE FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY
RAIN AND DANGEROUS LIGHTNING.

THIS IS A DANGEROUS STORM.  TAKE COVER IMMEDIATELY !

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, Jul 12, 3:49 PM EDT, 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
331PM EDT SUN JUL 12 1987

VERY STRONG AFTERNOON THUNDERSTORMS FORMING INLAND ARE MOVING TOWARD
THE BEACHES OF FLAGLER AND VOLUSIA COUNTIES OF NORTHEAST FLORIDA.

SCATTERED VERY HEAVY THUNDERSTORMS WITH VERY HEAVY RAINS WERE OCCURRING
FOR THE MOST PART OVER THE EAST HALF OF THE FLORIDA PENINSULA FROM THE
MATANZAS INLET INLAND TO BETWEEN GAINESVILLE AND OCALA AND EXTENDED
SOUTH TO VERO BEACH AND LAKE KISSIMMEE.

THE HEAVIEST CONCENTRATION OF THUNDERSTORMS WAS LOCATED ACROSS VOLUSIA
COUNTY FROM THE CANAVERAL NATIONAL SEASHORE PARK TO THE NORTHWEST CORNER
OF THE COUNTY NEAR LAKE GEORGE.

THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAINFALL AMOUNTS AND MAKE
DRIVING CONDITIONS VERY DANGEROUS AND WITH THE HIGH NUMBER OF MOTORISTS
HEADING HOME FROM AREA BEACHES...MOTORISTS SHOULD BE ESPECIALLY ALERT
AND CAREFULL.
ADDITIONALLY...THESE THUNDERSTORMS WILL PROuDUCE FREQUENT DANGEROUS
LIGHTNING...STRONG GUSTY WINDS AND POSSIBLY SMALL HAIL.

THE THUNDERSTORMS WERE MOVING TOWARD THE EAST AT 15 MPH.

Nearby

Severe Thunderstorm Warnings in Florida, 1987Every severe thunderstorm warning in 1987

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.