Alert archive / Florida / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 5, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Feb 12, 1993, 6:50 AM EST for Palm Beach County, Florida. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Feb 12, 1993, 6:50 AM EST (11:50 UTC)
- Expired
- Feb 12, 1993, 7:45 AM EST
- In force
- 55 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Palm Beach County, FL
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 00:00Z, 11.8 hours before the alert went out and 203 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
- 1449 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 813 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPBI 121150 SVRPBI FLC099-121245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WEST PALM BEACH FL 650 AM EST FRI FEB 12 1993 THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 AM EST FOR THE FOLLOWING LOCATIONS...... IN SOUTHEAST FLORIDA ...SOUTHERN PALM BEACH COUNTY AND THE ADJACANT WATERS OF THE SOUTHEAST FLORIDA COAST AT 645 AM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME NORTH CENTRAL BROWARD COUNTY. THIS STORM WAS MOVING NORTHEAST NEAR 30 MILES AN HOUR AND WILL MOVE INTO SOUTHERN PALM BEACH COUNTY DURING THE NEXT HALF HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO A.REAS WHERE WATER COVERS THE ROAD. NNNN
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, Feb 12, 1:00 AM EST, 5 hours 50 minutes before
FLZ017-120700- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 101 AM EST FRI FEB 12 1993 ...STRONG THUNDERSTORMS OVER SOUTH BREVARD AND INDIAN RIVER COUNTIES... AT 1255 AM...A BROKEN 60 MILE WIDE BAND OF SHOWERS AND STRONG THUNDERSTORMS EXTENDED FROM 50 MILES EAST OF DAYTONA BEACH TO THE COAST BETWEEN MELBOURNE AND SEBASTIAN INLET...THEN SOUTHWEST TO OVER SOUTHWEST FLORIDA. THE STRONGEST CLUSTER OF ACTIVITY WAS JUST MOVING OFFSHORE BETWEEN COCOA BEACH AND SEBASTIAN. THE INDIVIDUAL THUNDERSTORMS WERE RACING NORTHEAST AT 30 TO 40 MPH WHILE THE BAND MOVED EAST AT 20 MPH. THESE THUNDERSTORMS WERE PRODUCING VERY HEAVY RAIN...DANGEROUS LIGHTNING...A`ND STRONG GUSTY WINDS. MARINERS CAN EXPECT ROUGH AND CONFUSED SEAS IN AND NEAR THESE THUNDERSTORMS. ELSEWHERE...SCATTERED SHOWERS AND PATCHES OF RAIN WERE OVER MOST OF THE REST OF EAST CENTRAL FLORIDA.
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 11:53 AM EST | Severe Thunderstorm Warning | MLB | Saint Lucie | 52 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1993Every severe thunderstorm warning in 1993
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.