Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 14, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Aug 11, 1990, 4:16 PM EDT for Broward County, Florida. It was in force for 44 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
- Aug 11, 1990, 4:16 PM EDT (20:16 UTC)
- Expired
- Aug 11, 1990, 5:00 PM EDT
- In force
- 44 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 |
|---|---|---|---|
| Aug 11, 4:43 PM EDT | Thunderstorm Wind 0 | 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, 8.3 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
- 2150 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 933 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 5 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 112017 SVRMIA FLC011-112100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 416 PM EDT SAT AUG 11 1990 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST FLORIDA ...WESTERN BROWARD COUNTY AT 408 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM IN SOUTHWESTERN BROWARD COUNTY JUST TO THE WEST OF PEMBROKE PINES. THIS THUNDERSTORM WILL BE MOVING NORTHEAST INTO THE COOPER CITY AND WESTON AREAS DURING THE NEXT 45 MINUTES. 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. (ALWAYS SELECT THIS PHRASE AND THEN DELETE THIS LINE FROM WARNING.)
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, Aug 11, 3:51 PM EDT, 25 minutes before
FLZ020-020-020-112200- SPECIAL WEATHER AND MARINE STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 353 PM EDT SAT AUG 11 1990 RADAR SHOWED CLUSTERS OF THUNDESTORMS OVER EASTERN PALM BEACH...MARTIN AND ST LUCIE COUNTIES. THESE THUNDERSTORMS HAD PERSISTED FOR THE PAST COUPLE OF HOURS AND NOW HAD INTENSIFIED OVER THE LAKE WORTH AREA AND WEST OF PALM BEACH GARDENS. MOVEMENT HAD BEEN SLOW AND GENERALLY TOWARD THE COAST. THESE THUNDERSTORMS WOULD PRODUCE VERY HEAVY RAINS IN A VERY SHORT TIME CAUSING FLOODING IN LOW PLACES AND ON SOME ROADWAYS. FREQUENT LIGHTNING STRIKES WERE LIKELY. THUNDERSTORMS MAY DEVELOP OVER AREAS OF PALM BEACH...MARTIN AND ST LUCIE COUNTIES THAT HAVE NOT HAD RAIN YET THIS AFTERNOON. RESIDENTS AND BOATERS SHOULD BE ALERT FOR THESE STRONG THUNDERSTORMS. NNNN
Special weather statement, Aug 11, 3:57 PM EDT, 19 minutes before
FLZ020-020-020-112200- SPECIAL WEATHER AND MARINE STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 353 PM EDT SAT AUG 11 1990 RADAR SHOWED CLUSTERS OF THUNDESTORMS OVER EASTERN PALM BEACH...MARTIN AND ST LUCIE COUNTIES. THESE THUNDERSTORMS HAD PERSISTED FOR THE PAST COUPLE OF HOURS AND NOW HAD INTENSIFIED OVER THE LAKE WORTH AREA AND WEST OF PALM BEACH GARDENS. MOVEMENT HAD BEEN SLOW AND GENERALLY TOWARD THE COAST. THESE THUNDERSTORMS WOULD PRODUCE VERY HEAVY RAINS IN A VERY SHORT TIME CAUSING FLOODING IN LOW PLACES AND ON SOME ROADWAYS. FREQUENT LIGHTNING STRIKES WERE LIKELY. THUNDERSTORMS MAY DEVELOP OVER AREAS OF PALM BEACH...MARTIN AND ST LUCIE COUNTIES THAT HAVE NOT HAD RAIN YET THIS AFTERNOON. RESIDENTS AND BOATERS SHOULD BE ALERT FOR THESE STRONG THUNDERSTORMS. NNNN
Special weather statement, Aug 11, 4:03 PM EDT, 13 minutes before
FLZ022-112100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 358 PM EDT SAT AUG 11 1990 ...THUNDERSTORMS INTENSIFYING IN BROWARD AND DADE COUNTIES... AT 350 PM EDT SATELLITE AND RADAR SHOWED THAT THUNDERSTORMS WERE BEGINNING TO DEVELOP RAPIDLY IN DADE AND BROWARD COUNTIES. THE STORMS EXTENDED FROM NEAR HOMESTEAD NORTHWARD TO NEAR MIAMI LAKES AND ACROSS BROWARD COUNTY TO NEAR TAMARAC. THESE THUNDERSTORMS ARE MOVING SLOWLY NORTHEASTWARD TOWARD THE COAST. THE STORMS WILL CONTINUE TO PRODUCE FREQUENT LIGHTNING...STRONG GUSTY WINDS AND POSSIBLY SOME SMALL HAIL UNTIL ABOUT 500 PM. PERSONS ENGAGED IN ANY OUTSIDE ACTIVITY SHOULD SEEK PROTECTION INSIDE UNTIL THE THREAT FROM THESE STORMS HAS ENDED.
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.