Alert archive / Florida / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 9, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at May 9, 1986, 7:27 PM EDT for Broward County, Florida. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- May 9, 1986, 7:27 PM EDT (23:27 UTC)
- Expired
- May 9, 1986, 8:30 PM EDT
- In force
- 63 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.
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 11.5 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
- 1504 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 654 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMIA 092327 SVRMIA FLC011-100030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 727 PM EDT FRI MAY 9 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHEAST FLORIDA...SOUTHERN BROWARD WIND GUSTS TO 50 MPH AND HALF INCH HAIL HAVE BEEN REPORTED IN THE HOLLYWOOD AND MIRAMAR AREAS OF BROWARD COUNTY. RADAR INDICATES THE THUNDERSTORM ASSOCIATED WITH THESE CONDITIONS IS INTENSIFYING. IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY..AND YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR SEVERE WEATHER REPORTS 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, May 9, 2:50 PM EDT, 4 hours 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 250 PM EDT FRI MAY 9 1986 ...VERY HEAVY THUNDERSTORMS OVER THE INTERIOR AND COASTAL SECTIONS OF ST LUCIE COUNTY... AN AREA OF VERY HEAVY THUNDERSTORMS EXTENDED FROM JUST NORTHWEST OF FT PIERCE EXTENDING ALONG THE IMMEDIATE COASTAL SECTIONS. THIS AREA OF THUNDERSTORMS IS EXPECTED TO MOVE INTO MARTIN AND OKEECHOBEE COUNTIES IN THE NEXT HOUR. MOVEMENT WAS TOWARD THE SOUTH AT ABOUT 15 MPH. AS THESE THUNDERSTORMS MOVE THROUGH THE ABOVE MENTIONED COUNTIES SOME BRIEF PERIODS OF GUSTY WINDS HEAVY RAIN AND DANGEROUS LIGHTNING ARE LIKELY TO OCCUR. MARINE INTERESTS OPERATING ALONG THE COASTAL WATERS SHOULD BE PREPARED F;OR AN INCREASE IN WINDS AND SEAS AS THESE THUNDERSTORMS MOVE ACROSS THE AREA. THIS CONDITION IS EXPECTED TO LAST FOR THE NEXT SEVERAL HOURS. FURTHER STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT.
Special weather statement, May 9, 4:00 PM EDT, 3 hours 27 minutes before
SPECIAL WEATHER AND MARINE STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 400 PM EDT FRI MAY 9 1986 ...VERY HEAVY THUNDERSTORMS CONTINUE OVER THE ST LUCIE MARTIN AND OKEECHOBEE COUNTIES AND IMMEDIATE COASTAL SECTIONS... AT 355 PM EDT THE WEST PALM BEACH RADAR INDICATED AN AREA OF VERY HEAVY THUNDERSTORMS EXTENDING FROM FT PIERCE WEST INTO OKEECHOBEE COUNTY AND SOUTHEAST TO NEAR STUART. MOVEMENT WAS TOWARD THE SOUTH AT 15 MPH. DURING THE NEXT HOUR THUNDERSTORMS ARE EXPECTED TO MOVE INTO NORTHERN PALM BEACH COUNTY AND THE LAKE OKEECHOBEE REGION. AS THESE THUNDERSTORMS MOVE THROUGH THE ABOVE MENTIONED COUNTIES SOME BRIEF PERIODS OF GUSTY WINDS HEAVY RAIN AND DANGEROUS LIGHTNING ARE LIKELY TO OCCUR. MARINE INTERESTS OPERATING ALONG THE COASTAL WATERS AND LAKE OKEECHOBEE SHOULD BE PREPARED FOR AN INCREASE IN WINDS AND SEAS AS THESE THUNDERSTORMS MOVE ACROSS THE AREA. THIS CONDITION IS EXPECTED TO LAST INTO THE NEXT SYEVERAL HOURS. FURTHER STATEMENTS WILL BE ISSUED IF CONDITIONS WARRANT. WCF
Special weather statement, May 9, 4:47 PM EDT, 2 hours 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 445 PM EDT FRI MAY 9 1986 SEVERAL VERY HEAVY THUNDERSTORMS CONTINUED OVER EXTREME SOUTHERN DADE AND MAINLAND MONROE COUNTIES. THE HEAVIEST ACTIVITY WAS LOCATED OVER EVERGLADES NATIONAL PARK NORTH OF FLAMINGO. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN..STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES AND POSSIBLE HAIL. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MILES AN HOUR. SCATTERED VERY HEAVY THUNDERSTORMS EXTENDED FROM NEAR SEBRING SOUTHEAST TO JUST NORTH OF JUPITER AND THE COASTAL WATERS OF SOUTHERN MARTIN COUNTY. PATCHES OF LIGHT RAIN WITH A FEW EMBEDDED VERY HEAVY THUNDERSTORMS CONTINUED OVcER THE NORTHERN AND WESTERN BAHAMAS.
Special weather statement, May 9, 4:47 PM EDT, 2 hours 40 minutes before
TTAA00 KMIA092047ERE WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 445 PM EDT FRI MAY 9 1986 SEVERAL VERY HEAVY THUNDERSTORMS CONTINUED OVER EXTREME SOUTHERN DADE AND MAINLAND MONROE COUNTIES. THE HEAVIEST ACTIVITY WAS LOCATED OVER EVERGLADES NATIONAL PARK NORTH OF FLAMINGO. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN..STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES AND POSSIBLE HAIL. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MILES AN HOUR. SCATTERED VERY HEAVY THUNDERSTORMS EXTENDED FROM NEAR SEBRING SOUTHEAST TO JUST NORTH OF JUPITER AND THE COASTAL WATERS OF SOUTHERN MARTIN COUNTY. PATCHES OF LIGHT RAIN WITH A FEW EMBEDDED VERY HEAVY THUNDERSTORMS CONTINUED OVER THE NOR_THERN AND WESTERN BAHAMAS.
Special weather statement, May 9, 5:16 PM EDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 515 PM EDT FRI MAY 9 1986 AT 510 PM A LINE OF VERY HEAVY THUNDERSTORMS HAD DEVELOPED AND WAS MOVING SOUTHWARD OVER GLADES COUNTY. SOME OF THE H"EAVIER STORMS WILL PRODUCE LOCALLY VERY HEAVY RAIN..FREQUENT LIGHTNING..GUSTY WINDS AND POSSIBLY SMALL HAIL. RESIDENTS IN GLADES COUNTY SHOULD STAY ALERT TO ANY THREATENING WEATHER AND BE PREPARED TO TAKE NEEDED PROTECTIVE ACTIONS.
Special weather statement, May 9, 5:45 PM EDT, 1 hour 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 545 PM EDT FRI MAY 9 1986 A SOLID LINE OF VERY HEAVY THUNDERSTORMS EXTENDED FROM FT MEADE SOUTHEAST TO LAKE OKEECHOBEE. RESIDENTS OF GLADES COUNTY SHOULD BE ALERT FOR STRONG GUSTY WINDS...VERY HEAVY RAIN...FREQUENT LIGHTNING STRIKES AND POSSIBLE HAIL FOR THE NEXT 1 TO 2 HOURS AS THESE STORMS MOVE SOUTH AT 15 MILES AN HOUR. SCATTERED VERY HEAVY THUNDERSTORMS WERE OCCURRING OVER THE WESTERN AND SOUTHERN SECTIONS OF DADE COUNTY. A LARGE PATCH OF RAIN WITH A FEW EMBEDDED VERY HEAVY THUNDERSTORMS CONTINUED FROM CENTRAL FLORIDA SOUTH TO BOCA RATON AND THE ADJACENT COASTAL WATERS OF MARTIN AND PALM BEACH COUNTIES. ADN ISOLATED HEAVY THUNDERSTORM AND A FEW SHOWERS CONTINUED OVER THE NORTHERN BAHAMAS.
Nearby
Severe Thunderstorm Warnings in Florida, 1986Every severe thunderstorm warning in 1986
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.