Alert archive / Florida / Tornado Warnings in 1991
Tornado Warning 4, NWS Miami, FL
NWS Miami, FL issued this tornado warning at Jul 21, 1991, 3:09 PM EDT for Miami-Dade County, Florida. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1991, 3:09 PM EDT (19:09 UTC)
- Expired
- Jul 21, 1991, 3:45 PM EDT
- In force
- 36 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Miami-Dade County, FL
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 7.2 hours before the alert went out and 169 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
- 3078 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 15 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 211910 TORMIA FLC025-211945- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MIAMI FL 309 PM EDT SUN JUL 21 1991 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 345 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST FLORIDA ...NORTH CENTRAL DADE COUNTY AND THE ADJACENT COASTAL WATERS ALONG THE SOUTHEAST FLORIDA COAST AND THE ADJACENT COASTAL WATERS AT 305 PM EDT A TORNADO WAS SIGHTED NEAR HIALEAH GARDENS...ABOUT 3 MILES WEST OF OPA LOCKA AIRPORT. THE TORNADO WAS DRIFTING TO THE WEST MPH. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS UNDER STURDY FURNITURE IN AN INTERIOR ROOM ON THE LOWEST FLOOR. USE PILLOWS TO COVER YOUR BODY. AVOID WINDOWS. A MOBILE HOME IS NOT A SAFE REFUGE FROM A TORNADO. MOVE TO A MORE SUBSTANTIAL BUILDING. IF THREATENING WEATHER IS SIGHTED...TAKE SHELTER...THEN ASK A LAW ENFORCEMENT AGENCY TO RELAY YOUR SEVERE WEATHER REPORT TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
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, Jul 21, 1:57 PM EDT, 1 hour 12 minutes before
FLZ018-212000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 157 PM EDT SUN JUL 21 1991 ...STRONG THUNDERSTORM OVER WESTERN COLLIER COUNTY... AT 145 PM A STRONG THUNDERSTORM HAD DEVELOPED OVER WESTERN COLLIER COU 15 MILES EAST OF NAPLES. RADAR INDICATES THIS STORM IS MOVING WEST AROUND 15 MPH. DURING THE NEXT FEW HOURS RESIDENTS OF WESTERN COLLIER COUNTY AND BOATERS OVER THE COLLIER COUNTY COASTAL WATERS SHOULD BE ALERT AND$ SEEK SAFE SHELTER IN THE EVENT THREATENING WEATHER APPROACHES...AS THIS THUNDERSTORM CONTAINS DANGEROUS LIGHTNING STRIKES...STRONG GUSTY WINDS...HEAVY DOWNPOURS AND POSSIBLE HAIL.
Special weather statement, Jul 21, 1:59 PM EDT, 1 hour 10 minutes before
FLZ018-212000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 157 PM EDT SUN JUL 21 1991 ...STRONG THUNDERSTORM OVER WESTERN COLLIER COUNTY... AT 145 PM A STRONG THUNDERSTORM HAD DEVELOPED OVER WESTERN COLLIER COUNTY ABOUT 15 MILES EAST OF NAPLES. RADAR INDICATES THIS STORM IS MOVING WEST AROUND 15 MPH. DURING THE NEXT FEW HOURS RESIDENTS OF WESTERN COLLIER COUNTY AND BOATERS OVER THE COLLIER COUNTY COASTAL WATERS SHOULD BE *ALERT AND SEEK SAFE SHELTER IN THE EVENT THREATENING WEATHER APPROACHES...AS THIS THUNDERSTORM CONTAINS DANGEROUS LIGHTNING STRIKES...STRONG GUSTY WINDS...HEAVY DOWNPOURS AND POSSIBLE HAIL.
Special weather statement, Jul 21, 2:43 PM EDT, 26 minutes before
FLZ015>023-211945- SPECIAL AND MARINE WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 245 PM EDT SUN JUL 21 1991 ...STRONG THUNDERSTORMS OVER NORTHWESTERN COLLIER COUNTY... AT 227 PM MIAMI RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS OVER NORTHWESTERN COLLIER COUNTY IN THE VICINITY OF NAPLES. THESE STORMS WERE MOVING WEST AT ABOUT 15 MILES AN HOUR AND WILL MOVE TO THE COASTAL WATERS WITHIN THE NEXT HOUR. RESIDENTS AND MARINE INTERESTS SHOULD BE ALERT FOR STRONG GUSTY WINDS...REDUCED VISIBILITIES IN PERIODS OF HEAVY RAIN...FREQUENT LIGHTNING STRIKES...AND ROUGH SEAS. ELSEWHERE...SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED OVER THE PENINSULA SOUTH OF A SARASOTA/VERO BEACH LINE. THE HEAVIEST THUNDERSTORMS WERE OVER HIGHLANDS AND MAINLAND MONROE COUNTIES. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH VERY HEAVY RAIN...WERE OVER THE ATLANTIC FROM JUST OFFSHORE VERO BEACH TO ANDROS ISLAND. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...ONE WITH VERY HEAVY RAIN...WERE OVER THE GULF WELL NORTH OF THE LOWER KEYS. MOVEMENT WAS WEST AT ABOUT 15 MILES AN HOUR THE HIGHEST PRECIPITATION TOP WAS 53 THOUSAND FEET.*..LOCATED JUST NORTHWEST OF NAPLES.
Nearby
Tornado Warnings in Florida, 1991Every tornado warning in 1991Tornadoes in 1991
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.