Alert archive / Florida / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 16, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at May 21, 1986, 1:45 PM EDT for Martin County, Palm Beach County, Florida. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 21, 1986, 1:45 PM EDT (17:45 UTC)
- Expired
- May 21, 1986, 3:45 PM EDT
- In force
- 2 hr
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
Counties Martin County, FL, Palm Beach 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, 5.8 hours before the alert went out and 179 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
- 1096 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPBI 211745 SVRPBI FLC099-085-211945- BULLETIN - IMMEDIATE BROADCAST REQQUESTED SEVERE THUNDERSTORM AND SEPECIAL MARINE WARNNING NATIONAL WEATHER SERVICE WEST PALM BEACH FL 145 PM EDT WED MAY 21 1986 EXPIRES 345 PM EDT THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345PM EDT FOR PERSONS IN THE FOLLOWING COUNTIES IN SOUTH FLORIDA...PALM-BEACH MARTIN AT 145 PM EDT RADAR INICATED SEVERE THUNDERSTORMS OVER SOUTH LAKE OKEECHOBEE MOVING TO THE EAST NORTHEAST AT 20 MPH. THESE THUNDERSORMS WILL MOVE THROUGH PALM BEACH AND MARTIN COUNTIES DURING THE NEXT FEW HOURS. PERSONS IN THE ABOVE COUNTIES AND MARINE INTERESTS ON LAKE OKEECHOBEE SHOULD SEEK SAFE SHELTER IF CO;NDITIONS WARRANT.
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, May 21, 1:35 PM EDT, 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTONA BEACH FL 130 PM EDT WED MAY 21 1986 THE SEVERE THUNDERSTORM WATCH NUMBER 204 CONTINUES IN EFFECT FOR MUCH OF CENTRAL AND SOUTH FLORIDA AND THE ADJACENT COASTAL WATERS. THIS WATCH INCLUDES THE FOLLOWING COUNTIES UNDER THE RESPONSIBILITY OF THE DAYTONA BEACH NATIONAL WEATHER SERVICE OFFICE..VOLUSIA..BREVARD.. INDIAN RIVER..FLAGLER AND MARION. UNSTABLE WEATHER CONDITIONS IN ASSOCIATION WITH A FRONTAL SYSTEM MOVING THROUGH NORTH FLORIDA MAKE CONDITIONS FAVORABLE FOR INTENSE THUNDERSTORM DEVELOPEMENT THIS AFTERNOON. AT 130PM RADAR INDICATES THE GREATEST AREA OF CONCERN FOR THE STRONGEST THUNDERSTORMS EXTENDS FROM VERO BEACH ACROSS THE STATE TO NORTH OF FORT MYERS..COVERING ABOUT A 50 MILE WIDE AREA. THE MOST INTENSE STORMS WERE NEAR LAKE PLACID AND SEBRING AND ALONG THE KISSIMMEE RIVER..MOVING NORTHEAST AT 25 MPH. 0 [ OTHER THUNDERSTORMS WERE SCATTERED OVER THE COASTAL WATERS BETWEEN VERO BEACH AND CAPE CANAVERAL. PERSONS IN THE WATCH AREA SHOULD BE ON THE ALERT FOR SEVERE THUNDERSTORM DEVELOPEMENT THIS AFTERNOON.
Nearby
Severe Thunderstorm Warnings in Florida, 1986Every severe thunderstorm warning in 1986
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.