Alert archive / Florida / Tornado Warnings in 1999
Tornado Warning 8, NWS Miami, FL
NWS Miami, FL issued this tornado warning at Sep 21, 1999, 5:59 AM EDT for Miami-Dade County, Florida. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Sep 21, 1999, 5:59 AM EDT (09:59 UTC)
- Expired
- Sep 21, 1999, 6:30 AM EDT
- In force
- 31 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Miami-Dade County, FL
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 10.0 hours before the alert went out and 3 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
- 841 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMFL 211004 RRA TORMIA FLC025-211030- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MIAMI FL 559 AM EDT TUE SEP 21 1999 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * TORNADO WARNING FOR... NORTHEASTERN MIAMI-DADE COUNTY IN FLORIDA * UNTIL 630 AM EDT * AT 559 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO JUST WEST OF MIAMI INTERNATIONAL AIRPORT...MOVING NORTHEAST AT 25 MPH. THIS WILL MOVE TO VIRGINIA GARDENS AND WEST OF MIAMI SHORES. SEEK A STURDY SHELTER IMMEDIATELY! LAT...LON 2575 8044 2574 8025 2595 8013 2595 8031
What forecasters said that day
The local office's own words before this tornado 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, Sep 21, 5:45 AM EDT, 14 minutes before
FLZ071>074-212200- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 545 AM EDT TUE SEP 21 1999 ...TROPICAL STORM WARNING FOR COASTAL COUNTIES... ...WIND ADVISORY FOR GLADES...HENDRY AND THE FLORIDA KEYS... ...LOCAL FLOODING POSSIBLE... ...RIP CURRENTS WILL BE LIKELY ALONG COLLIER COUNTY BEACHES... ...POSSIBLE ISOLATED TORNADOS... TROPICAL STORM HARVEY WILL MOVE ACROSS SOUTH FLORIDA TODAY WITH ABUNDANT TROPICAL MOISTURE. THIS WILL LEAD TO NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS SOUTH FLORIDA TODAY WITH VERY WINDY CONDITIONS. LOCALLY HEAVY RAINFALL IS POSSIBLE WITH RAINFALL AMOUNTS OF 5 TO 8 INCHES IN SOME AREAS THIS WILL RESULT IN MODERATE FLOODING OF LOW LYING AREAS AND PONDING OF WATER ON ROADWAYS. MOTORISTS NEED TO EXERCISE CAUTION AND REDUCE SPEED IN THE HEAVY RAIN AS VISIBILITY WILL LOWER AND STANDING WATER MAY RESULT IN HAZARDOUS DRIVING CONDITIONS. WINDY CONDIITONS OF 30 TO 40 MPH WITH HIGHER GUSTS ARE EXPECTED TODAY WITH THE PASSAGE OF TROPICAL STORM HARVEY. LOOSE OBJECTS MAY BE BLOWN ABOUT AND HIGH PROFILE VEHICLES MAY BE DIFFICULT TO CONTROL AT TIMES. LIGHTNING AGAIN WILL BE A HAZARD SO PERSONS CONDUCTING OUTDOOR ACTIVITIES SHOULD EXERCISE CAUTION AND SEEK SHELTER IF A THUNDERSTORM APPROACHES. AT THE BEACHES OF COLLIER COUNTY, WESTERLY WINDS OF 30 TO 40 MPH ALONG WITH MODERATE SWELLS BEING GENERATED IN THE VICINITY OF TROPICAL STORM HARVEY WILL MEAN RIP CURRENTS ARE LIKELY MAINLY DURING THE AFTERNOON. IN ADDITION...HEAVY SURF WILL COMBINE TO MAKE SWIMMING HAZARDOUS. SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY...
Special weather statement, Sep 21, 5:45 AM EDT, 14 minutes before
FLZ071>074-212200- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 545 AM EDT TUE SEP 21 1999 ...TROPICAL STORM WARNING FOR COASTAL COUNTIES... ...WIND ADVISORY FOR GLADES...HENDRY AND THE FLORIDA KEYS... ...LOCAL FLOODING POSSIBLE... ...RIP CURRENTS WILL BE LIKELY ALONG COLLIER COUNTY BEACHES... ...POSSIBLE ISOLATED TORNADOS... TROPICAL STORM HARVEY WILL MOVE ACROSS SOUTH FLORIDA TODAY WITH ABUNDANT TROPICAL MOISTURE. THIS WILL LEAD TO NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS SOUTH FLORIDA TODAY WITH VERY WINDY CONDITIONS. LOCALLY HEAVY RAINFALL IS POSSIBLE WITH RAINFALL AMOUNTS OF 5 TO 8 INCHES IN SOME AREAS THIS WILL RESULT IN MODERATE FLOODING OF LOW LYING AREAS AND PONDING OF WATER ON ROADWAYS. MOTORISTS NEED TO EXERCISE CAUTION AND REDUCE SPEED IN THE HEAVY RAIN AS VISIBILITY WILL LOWER AND STANDING WATER MAY RESULT IN HAZARDOUS DRIVING CONDITIONS. WINDY CONDIITONS OF 30 TO 40 MPH WITH HIGHER GUSTS ARE EXPECTED TODAY WITH THE PASSAGE OF TROPICAL STORM HARVEY. LOOSE OBJECTS MAY BE BLOWN ABOUT AND HIGH PROFILE VEHICLES MAY BE DIFFICULT TO CONTROL AT TIMES. LIGHTNING AGAIN WILL BE A HAZARD SO PERSONS CONDUCTING OUTDOOR ACTIVITIES SHOULD EXERCISE CAUTION AND SEEK SHELTER IF A THUNDERSTORM APPROACHES. AT THE BEACHES OF COLLIER COUNTY, WESTERLY WINDS OF 30 TO 40 MPH ALONG WITH MODERATE SWELLS BEING GENERATED IN THE VICINITY OF TROPICAL STORM HARVEY WILL MEAN RIP CURRENTS ARE LIKELY MAINLY DURING THE AFTERNOON. IN ADDITION...HEAVY SURF WILL COMBINE TO MAKE SWIMMING HAZARDOUS. SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY...
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 10:00 PM EDT | Flash Flood Warning | MFL | Collier | 5 hr |
| Sep 21, 3:00 AM EDT | Flash Flood Warning | MFL | Collier | 9 hr |
| Sep 21, 4:50 AM EDT | Tornado Warning | MFL | Broward, Miami-Dade | 40 min |
| Sep 21, 5:27 AM EDT | Tornado Warning | MFL | Broward | 43 min |
Nearby
Tornado Warnings in Florida, 1999Every tornado warning in 1999Tornadoes in 1999
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.