Alert archive / Florida / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 3, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Jul 13, 1987, 6:00 PM EDT for Broward County, Florida. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jul 13, 1987, 6:00 PM EDT (22:00 UTC)
- Expired
- Jul 13, 1987, 7:00 PM EDT
- In force
- 60 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Broward 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
Key West, FL (KEYW), launched 12:00Z, 10.0 hours before the alert went out and 218 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.
- Mixed-layer CAPE
- 2539 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 703 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMIA 132200
SVRMIA
FLC011-132300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
600 PM EDT MON JUL 13 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL 700 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST FLORIDA
...EASTERN BROWARD AND THE ADJACENT COASTAL WATERS.
AT 6PM MIAMI RADAR INDICATED A SEVERE THUNDERSTORM OVER EASTERN
BROWARD COUNTY JUST SOUTHWEST OF POMPANO BEACH. THE THUNDERSTORM WAS
MOVING EAST AT 10 MILES AN HOUR AND WILL BE MOVING OVER THE COASTAL
WATERS DURING THE HOUR.
SEEK SHELTER FROM THIS THUNDERSTORM IN A STRONG BUILDING. DAMAGING
WIND..HAIL..VERY HEAVY RAIN..AND DEADLY LIGHTNING ARE ALL POSSIBLE
IN THIS THUNDERSTORM. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES
AND STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
BOATERS IN THE ABOVE MENTIONED WATERS SHOULD SEEK SAFE HARBOR BEFORE
THE ONSET OF THE STORM.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 13, 3:51 PM EDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 350 PM EDT MON JUL 13 1987 ...THUNDERSTORMS SOME STRONG IN OKEECHOBEE AND ST LUCIE COUNTIES RADAR SHOWED STRONG THUNDERSTORMS IN THE ABOVE COUNTIES MOVEING EASTWARD 10 MPH. THE THUNDERSTORMS WILL HAVE HEAVY RAIN...STRONG AND GUSTY WINDS DANGEROUS LIGHTNING STRIKES. THESE THUNDERSTORMS COULD CONTINUE THROUGH THE AFTERNOON AND EARLY EVENING HOURS. AREA RESIDENTS AND BOATERS ON LAKE OKEECHOBEE SHOULD BE ALERT FOR THESE STRONG THUNDERSTORMS.
Special weather statement, Jul 13, 5:19 PM EDT, 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 515 PM EDT MON JUL 13 1987 ...LOCALLY HEAVY RAINS ON TAP FOR EVENING RUSH HOUR... SCATTERED SHOWERS AND THUNDERSTORMS ARE DEVELOPING RAPIDLY OVER THE METROPOLITAN AREAS OF DADE AND BROWARD COUNTIES THIS AFTERNOON. MOST OF THIS ACTIVITY WILL HAVE THE POTENTIAL TO REDUCE VISIBILITIES AND PRODUCE THE SUDDEN PONDING OF WATER ON OUR RUSH HOUR ROADWAYS. MOTORISTS ARE URGED TO SLOW DOWN AND USE INCREASED CAUTION DUE TO THE SLIPPERY CONDITIONS. THE SHOWERS AND THUNDERSTORMS WILL PERSIST FOR THE NEXT SEVERAL HOURS AND ARE MOVING IN AN EASTWARD DIRECTION AT ABOUT 10 MILES AN HOUR. BOATERS OVER THE COASTAL WATERS OF DADE AND BROWARD COUNTIES SHOULD KEEP A WEATHER EYE TOWARDS THE COAST IN THE EVENT THE STORMS MOVE EAST OVER THE WATER.
Special weather statement, Jul 13, 5:35 PM EDT, 25 minutes before
SPECIAL WEATHER AND MARINE STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 525 PM EDT MON JUL 13 198787 ...THUNDERSTORMS SOME STRONG ALONG AND JUST OFFSHORE ST LUCIE MARTIN AND PALM BEACH COUNTIES RADAR SHOWED STRONG THESE THUNDERSTORMS WITH LITTLE MOVMENT THE THUNDERSTORMS WILL HAVE HEAVY RAIN...STRONG AND GUSTY WINDS AND ROUGH SEAS AND DANGEROUS LIGHTNING STRIKES. BOATERS AND RESIDENTS SHOULD SEEK A SAFE PLACE. IF WEATHER BECO$MES THREATNENING THESE THUNDERSTORMS COULD CONTINUE THROUGH THE AFTERNOON AND EARLY EVENING HOURS.
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.