Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 3, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Jun 20, 1990, 4:12 PM EDT for Broward County, Florida. It was in force for 33 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 20, 1990, 4:12 PM EDT (20:12 UTC)
- Expired
- Jun 20, 1990, 4:45 PM EDT
- In force
- 33 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Broward County, FL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 20, 4:25 PM EDT | Tornado F0 | Broward, FL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 8.2 hours before the alert went out and 218 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
- 1244 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 778 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -8 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 202010 RRA SVRMIA FLC011-202045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 412 PM EDT WED JUN 20 1990 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST FLORIDA ...NORTH CENTRAL BROWARD COUNTY AT 4:00 PM EDT RADAR INDICATED A HAIL PRODUCING THUNDERSTORM OVER EXTREME NORTH CENTRAL BROWARD MOVING NORTH AT 10 MPH. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES. A MOBILE HOME IS NOT A SAFE REFUGE FROM A SEVERE THUNDERSTORM...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 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, Jun 20, 2:46 PM EDT, 1 hour 26 minutes before
FLZ015>23-201930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 240 PM EDT WED JUN 20 1990 AT 230 PM...MIAMI RADAR INDICATED CLUSTERS OF THUNDERSTORMS DEVELOPING OVER BROWARD...DADE AND THE EVERGLADES OF COLLIER COUNTIES. RESIDENTS OF THESE AREASSHOULD BE ALERT FOR THESE STORMS MAY BY ACCOMPANIED WITH STRONG GUSTY WINDS... FREQUENT LIGHTNING STRIKES...AND VERY HEAVY RAINFALL DURING THE NEXT FEW HOURS. MOVEMENT WAS NORTH AT 10 MILES AN HOUR. THIS ACTIVITY ALSO EXTENDED OVER NORTHERN MAINLAND MONROE COUNTY. AN ISOLATED THUNDERSTORM...WITH VERY HEAVY RAIN...WAS LOCATED 10-15 MILES INLAND FROM BOCA RATON. OTHER SHOWERS WERE WEST OF FORT PIERCE. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...WERE OVER AND OFFSHORE THE NORTHERN AND WESTERN BAHAMAS.
Special weather statement, Jun 20, 3:45 PM EDT, 27 minutes before
FLZ015>23-202030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 340 PM EDT WED JUN 20 1990 AT 330 PM...MIAMI RADAR INDICATED CLUSTERS OF THUNDERSTORMS CONTINUED DEVELOPINGOVER BROWARD...DADE AND THE EVERGLADES OF COLLIER COUNTIES. RESIDENTS OF THESE COUNTIES SHOULD BE ALERT FOR THESE STORMS MAY BY ACCOMPANIED WITH STRONG GUSTY WINDS...FREQUENT LIGHTNING STRIKES...AND VERY HEAVY RAINFALL DURING THE NEXT FEWHOURS. MOVEMENT WAS NORTH AT 10 MILES AN HOUR. THIS ACTIVITY ALSO EXTENDED OVERNORTHERN MAINLAND MONROE COUNTY. ISOLATED THUNDERSTORMS...WITH VERY HEAVY RAIN...WERE LOCATED OVER INTERIOR PALM BEACH COUNTY WEST OF BOCA RATON AND DELRAY BEACH. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...WERE OVER AND OFFSHORE THE NORTHERN AND WESTERN BAHAMAS. A FEW SHOWERS WERE NEAR STUART AND FORT PIERCE AND OVER THE GULF WATERS NORTH OF THE LOWER KEYS
Nearby
Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.