Alert archive / Florida / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 8, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Apr 15, 1993, 11:37 PM EDT for Collier County, Florida. It was in force for 68 min.
The area
The counties it named.
The facts
- Issued
- Apr 15, 1993, 11:37 PM EDT (03:37 UTC)
- Expired
- Apr 16, 1993, 12:45 AM EDT
- In force
- 68 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Collier County, FL
The nearest sounding before it
Key West, FL (KEYW), launched 00:00Z, 3.6 hours before the alert went out and 174 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
- 1937 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 696 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 7.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 160335 SVRMIA FLC021-FLZ504-160445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MIAMI FL 1137 PM EDT THU APR 15 1993 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 1245 AM EDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN SOUTHWEST FLORIDA ...COLLIER COUNTY AND FOR BOATERS ON THE COASTAL WATERS FROM ...EVERGLADES CITY TO BONITA BEACH THE CLUSTER OF SEVERE THUNDERSTORMS WHICH HAS BEEN MOVING TOWARDS THE COLLIER COUNTY COAST IS CURRENTLY MOVING ONSHORE. THIS CLUSTER OF THUNDERSTORMS IS MOVING EAST AT 25 MPH AND WILL BE MOVING INLAND DURING THE NEXT HOUR. THUNDERSTORMS THREATEN BOATER SAFETY WITH GUSTY WINDS OF 35 KNOTS OR GREATER...ROUGH SEAS AND LIGHTNING. YOUR BEST COURSE OF ACTION IS TO SEEK SAFE HARBOR...BUT IF YOU ARE CAUGHT ON THE OPEN WATER... STAY BELOW DECK AND AWAY FROBM UNGROUNDED METAL OBJECTS. MAKE SURE YOU AND ALL YOUR CREW ARE WEARING FLOTATION DEVICES.
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, Apr 15, 7:24 PM EDT, 4 hours 13 minutes before
FLZ018-022-160030-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
720 PM EDT THU APR 15 1993
A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR COLLIER...GLADES AND HENDRY
COUNTIES UNTIL 1100 PM EDT...
AT THE PRESENT TIME A LARGE AREA OF MOSTLY LIGHT RAIN CONTINUED MOVING OFF THE
GULF OVER THE SOUTHWEST COAST. THE HEAVIEST LINE OF THUNDERSTORMS EMBEDDED IN
THIS AREA WAS ALONG THE COLLIER COUNTY COASTAL WATERS. THE AREA WAS MOVING
SOUTHEAST AT 10 TO 15 MILES AN HOUR WHILE THE THUNDERSTORMS WERE MOVING
NORTHEAST AT 25 MILES AN HOUR.
RESIDENTS OF SOUTHWEST FLORIDA INCLUDING COLLIER...HENDRY AND GLADES COUNTY
SHOULD BE ALERT FOR POSSIBLE SEVERE WEATHER INCLUDING LARGE HAIL...FREQUENT
CLOUD TO GROUND LIGHTNING STRIKES...AND DAMAGING THUNDERSTORM WINDS. MARINE
INTERESTS SHOULD SEEK SAFE HARBOR UNTIL THUNDERSTORMS PASS OVER THE AREA.
IF SEVERE WEATHER APPROACHES SEEK SHELTER AT ONCE...PLEASE REPORT ANY SEVERE
WEATHER TO THE LOCAL LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL
WEATHER SERVICE. MONITOR LOCAL RADIO...TV...OR NOAA WEATHER RADIO FOR
LATER STATEMENTS OR WARNINGS.
PUBLIC SERVICE UNITSpecial weather statement, Apr 15, 7:39 PM EDT, 3 hours 58 minutes before
FLZ011-013>023-160036- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WEST PALM BEACH FL 736 PM EDT THU APR 15 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PALM BEACH...MARTIN... ST LUCIE...AND OKEECHOBEE COUNTIES AND THE ADJACENT COASTAL WATERS UNTIL 11 PM EDT... AT 727 PM EDT...WEATHER SERVICE RADAR CONTINUES TO INDICATE A LARGE AREA OF MOSTLY LIGHT RAIN WITH A FEW EMBEDDED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN WERE LOCATED ALONG THE WEST COAST OF FLORIDA AND THE ADJACENT GULF WATERS FROM POLK COUNTY SOUTH TO 70 MILES WEST AND SOUTHWEST OF CAPE ROMANO. THE HEAVIEST RAIN WAS LOCATED OVER POLK COUNTY 15 MILES SOUTH OF POLK CITY. OTHER ISOLATED SHOWERS WERE LOCATED OVER THE GULF WATERS 25 MILES NORTHWEST OF MARATHON. MOVEMENT WAS NORTHEAST AT 30 TO 35 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 15, 8:42 PM EDT, 2 hours 55 minutes before
FLZ011-013>023-160140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WEST PALM BEACH FL 838 PM EDT THU APR 15 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PALM BEACH...MARTIN... ST LUCIE...AND OKEECHOBEE COUNTIES AND THE ADJACENT COASTAL WATERS UNTIL 11 PM EDT... AT 825 PM EDT...WEATHER SERVICE RADAR CONTINUES TO INDICATE A LARGE AREA OF MOSTLY LIGHT RAIN WITH A FEW EMBEDDED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN WERE LOCATED OVER THE CENTRAL AND SOUTHWEST PORTIONS OF THE PENINSULA AND THE ADJACENT GULF WATERS FROM POLK COUNTY SOUTH AND SOUTHWEST TO 25 MILES NORTHWEST OF THE MIDDLE FLORIDA KEYS. THE STRONGEST THUNDERSTORMS WERE LOCATED OVER NORTHWEST DE SOTO COUNTY 15 MILES NORTHWEST OF ARCADIA AND OVER CENTRAL POLK COUNTY EAST OF FORT MEAD. OTHER STRONG THUNDERSTORMS WTH HEAVY RAIN WERE LOCATED OVER THE GULF WATERS 20 TO 25 MILES SOUTH OF CAPE ROMANO. MOVEMENT WAS NORTHEAST AT 25 TO 30 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIO6NS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 15, 9:40 PM EDT, 1 hour 57 minutes before
FLZ011-013>023-160240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WEST PALM BEACH FL 938 PM EDT THU APR 15 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PALM BEACH...MARTIN... ST LUCIE...AND OKEECHOBEE COUNTIES AND THE ADJACENT COASTAL WATERS UNTIL 11 PM EDT... AT 926 PM EDT...WEATHER SERVICE RADAR INDICATED A LARGE AREA OF MOSTLY LIGHT RAIN WITH EMBEDDED THUNDERSTORMS...SEVERAL WITH VERY HEAVY RAIN WERE LOCATED OVER THE CENTRAL AND SOUTHWEST PORTIONS OF THE PENINSULA AND THE ADJACENT GULF WATERS FROM ORANGE COUNTY SOUTHWEST AND SOUTH TO THE MIDDLE FLORIDA KEYS. THE STRONGEST THUNDERSTORMS WERE LOCATED FROM CENTRAL OSCEOLA COUNTY SOUTHWEST TO CHARLOTTE HARBOR. OTHER STRONG THUNDERSTORMS WERE LOCATED OVER WESTERN COLLIER COUNTY 20 MILES SOUTHEAST OF NAPLES AND OVER THE GULF WATERS SOUTH OF CAPE ROMANO. MOVEMENT WAS NORTHEAST AT 30 TO 35 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR L ATER STATEMENTS AND POSSIBLE WARNINGS.
Local storm report, Apr 15, 9:43 PM EDT, 1 hour 54 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMIA FL
940 PM EDT THU APR 15 1993
DATE TIME LOCATION/EVENT
4/15 930 PM EDT COLLIER COUNTY...NAPLES
PUBLIC REPOTED PEA SIZED HAIL AND WIND GUSTS TO 35 KTS.
POSSILBE WATERSPOUT ALSO OBSERVED OVER THE GULF.Special weather statement, Apr 15, 10:46 PM EDT, 51 minutes before
FLZ011-013>023-160340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WEST PALM BEACH FL 1042 PM EDT THU APR 15 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PALM BEACH...MARTIN... ST LUCIE...AND OKEECHOBEE COUNTIES AND THE ADJACENT COASTAL WATERS UNTIL 5 AM EDT... AT 1030 PM EDT...WEATHER SERVICE RADAR INDICATED A VERY LARGE AREA OF RAIN WITH CLUSTERS OF THUNDERSTORMS...SEVERAL WITH VERY HEAVY RAIN WERE LOCATED OVER THE CENTRAL AND SOUTHWEST PORTIONS OF THE PENINSULA AND THE ADJACENT GULF WATERS FROM 20 MILES WEST OF TITUSVILLE SOUTHWEST TO FORT MYERS AND THEN SOUTH TO THE FLORIDA KEYS. THE STRONGEST THUNDERSTORMS WERE LOCATED OVER SOUTHWEST COLLIER COUNTY SOUTHWEST OF EVERGLADES CITY AND OVER SOUTHERN MAINLAND MONROE COUNTY NORTH OF FLAMINGO. OTHER STRONG THUNDERSTORMS WERE LOCATED OVER CENTRAL HENDRY COUNTY SOUTH OF LABELLE AND OVER SOUTHEASTERN POLK COUNTY. MOVEMENT WAS NORTHEAST AT 30 TO 35 MILES AN HOUR. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 10:05 PM EDT | Severe Thunderstorm Warning | MFL | Collier | 55 min |
| Apr 16, 2:25 AM EDT | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 60 min |
| Apr 16, 3:25 AM EDT | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 65 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.