An upper level trough of low pressure over the Florida peninsula generated scattered afternoon showers and thunderstorms.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MFL wrote it up.
An upper level trough of low pressure over the Florida peninsula generated scattered afternoon showers and thunderstorms.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Miami, FL wrote its last area forecast discussion before the first event at Sep 18, 2:57 PM EST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 357 PM EDT FRI SEP 18 2015 .SHORT TERM (TONIGHT-SUNDAY NIGHT)... THE MID LEVEL TROUGH THAT HAS BEEN OVER THE EASTERN GULF OF MEXICO THE PAST FEW DAYS WILL BEGIN TO GET PICKED UP BY A STRONGER UPSTREAM TROUGH AND LIFT TO THE NORTHEAST TONIGHT AND SATURDAY. A SURFACE TROUGH IS ALSO EXPECTED TO DEVELOP WITH A STRONG DEEP SOUTHWESTERLY FLOW FORMING ACROSS SOUTH FLORIDA WHICH WILL PERSIST OVER THE WEEKEND AND POSSIBLY INTO EARLY NEXT WEEK AS THE LOW PRESSURE AREA MOVES SLOWLY OFFSHORE FROM THE CAROLINAS. THE CYCLONIC CIRCULATION AROUND THE LOW PRESSURE WILL USHER IN DRIER AIR ALOFT ACROSS SOUTH FLORIDA OVER THE WEEKEND WITH PWAT REMAINING NEAR 2" ON SATURDAY AND TO LOWERING TO AROUND 1.5" ON SUNDAY. THIS WILL KEEP ELEVATED POPS ONGOING FOR EARLY IN THE WEEKEND OVER THE INTERIOR AND EAST COAST. HOWEVER, THE GFS IS INDICATING STEERING FLOW MAY BE CLOSE TO 20 MPH ON SATURDAY WHICH WOULD HINT AT MAINLY FAST MOVING SHOWERS AND AN ISOLATED THUNDERSTORM AS THE PRIMARY THREAT ESPECIALLY EARLY IN THE WEEKEND. BASED ON THIS, THE THREAT FOR HEAVY RAINFALL HAS ENDED AND THUS THE FLOOD WATCH HAS BEEN CANCELLED. .LONG TERM (MONDAY-FRIDAY)... FOR NEXT WEEK, SOME MOISTURE INCREASE WILL OCCUR AS THE LOW PRESSURE LIFTS FARTHER TO THE NORTHEAST AND LOW LEVEL FLOW BECOMES VERY WEAK WITH MOSTLY SEA BREEZE INTERACTION ACTIVITY THROUGH THE MIDDLE OF THE WEEK. THEN, BOTH THE GFS AND ECMWF SHOW A STRONG CUT-OFF LOW DEVELOPING OVER THE SOUTHEAST STATES TOWARDS THE END OF THE WEEK WITH SOUTHWEST FLOW BECOMING DOMINANT AGAIN OVER SOUTH FLORIDA. THIS WILL BRING AN INCREASED THREAT FOR THE HIGHEST CHANCES FOR RAIN OVER THE INTERIOR AND EAST COAST METRO REGION AT THAT TIME. && .MARINE... OUTSIDE OF THUNDERSTORM ACTIVITY, A SOUTHWEST WIND WILL BE THE DOMINANT FORCE FOR TONIGHT AND SATURDAY AT GENERALLY 15 KNOTS OR LESS WITH A LIGHT AND VARIABLE WIND DEVELOPING LATE IN THE WEEKEND INTO EARLY NEXT WEEK. THE WIND FLOW COULD THEN BECOME LIGHT NORTHEAST TO EAST TOWARDS THE MIDDLE OF NEXT WEEK. THIS WILL RESULT IN SEAS OF 4 FEET OR LESS THROUGH THE PERIOD. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 75 91 76 91 / 20 40 20 30 FORT LAUDERDALE 77 91 78 92 / 20 50 20 40 MIAMI 77 91 78 93 / 20 40 20 40 NAPLES 77 89 78 91 / 20 20 10 20 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. && SHORT TERM...30/KOB LONG TERM....30/KOB
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 500 PM EDT FRI SEP 18 2015 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 190900- LAKE OKEECHOBEE-BISCAYNE BAY- COASTAL WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL OUT 20 NM- COASTAL WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL OUT 20 NM- WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL EXTENDING FROM 20 NM TO 60 NM- WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL EXTENDING FROM 20 NM TO THE TERRITORIAL WATERS OF THE BAHAMAS-GLADES-HENDRY- INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-INLAND COLLIER- INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-METRO MIAMI DADE- MAINLAND MONROE-COASTAL PALM BEACH-COASTAL BROWARD- COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE- COASTAL WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL OUT 20 NM- COASTAL WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE, FL OUT 20 NM- GULF WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL EXTENDING FROM 20 TO 60 NM- 500 PM EDT FRI SEP 18 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...TONIGHT THUNDERSTORMS: THERE IS A SLIGHT CHANCE OF A THUNDERSTORM THIS EVENING. LIGHTNING STRIKES ARE THE PRIMARY RISK FROM THE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS ARE FORECAST EACH DAY WITH LIGHTNING BEING THE PRIMARY RISK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI. GREGORIA
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
211 PM EDT FRI SEP 18 2015
FLZ072-074-172-173-181830-
COASTAL MIAMI DADE COUNTY FL-METROPOLITAN MIAMI DADE FL-
METRO BROWARD COUNTY FL-COASTAL BROWARD COUNTY FL-
211 PM EDT FRI SEP 18 2015
...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE
LIGHTNING...45 TO 55 MPH WINDS AND THE DEVELOPMENT OF FUNNEL CLOUDS
FOR SOUTHEASTERN BROWARD AND NORTHEASTERN MIAMI-DADE COUNTIES UNTIL
230 PM EDT...
* AT 210 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
WITH ROTATION...CAPABLE OF PRODUCING A FUNNEL CLOUD OVER NORTH
MIAMI BEACH...MOVING EAST AT 10 MPH.
* IN ADDITION...FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45
TO 55 MPH...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE
POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN
FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE WINDS
CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED
SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM
PASSES.
* LOCATIONS IMPACTED INCLUDE...
HOLLYWOOD...HALLANDALE...MIAMI GARDENS...NORTH MIAMI...NORTH MIAMI
BEACH...AVENTURA...DANIA BEACH...SUNNY ISLES BEACH...WEST PARK...
GOLDEN GLADES...OJUS...PEMBROKE PARK...GOLDEN BEACH...IVES
ESTATES...HOLLYWOOD DOWNTOWN AND FIU NORTH CAMPUS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS OCCASIONALLY TOUCH DOWN AND PRODUCE TORNADOES. MOVE
INDOORS AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 2592 8012 2593 8012 2593 8013 2591 8013
2591 8014 2590 8014 2589 8019 2596 8023
2604 8013 2604 8011
TIME...MOT...LOC 1810Z 252DEG 10KT 2594 8017
GREGORIASPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
218 PM EDT FRI SEP 18 2015
FLZ067-068-072-168-172-181845-
METRO BROWARD COUNTY FL-COASTAL BROWARD COUNTY FL-
INLAND PALM BEACH COUNTY FL-COASTAL PALM BEACH COUNTY FL-
METRO PALM BEACH COUNTY FL-
218 PM EDT FRI SEP 18 2015
...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE
LIGHTNING...45 TO 55 MPH WINDS AND THE DEVELOPMENT OF FUNNEL CLOUDS
FOR NORTHEASTERN BROWARD AND SOUTHEASTERN PALM BEACH COUNTIES UNTIL
245 PM EDT...
* AT 217 PM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS...CAPABLE OF PRODUCING STRONG WINDS AND POSSIBLE
FUNNEL CLOUDS...EXTENDING ALONG A LINE EXTENDING FROM NEAR
PALM AIRE TO SUNNY ISLES BEACH...AND MOVING NORTHEAST AT 20 MPH.
* IN ADDITION...FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45
TO 55 MPH...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE
POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN
FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE WINDS
CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED
SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM
PASSES.
* LOCATIONS IMPACTED INCLUDE...
FORT LAUDERDALE...HOLLYWOOD...CORAL SPRINGS...POMPANO BEACH...BOCA
RATON...DEERFIELD BEACH...DELRAY BEACH...TAMARAC...MARGATE...
LIGHTHOUSE POINT...LAUDERDALE-BY-THE-SEA...HIGHLAND BEACH...COCONUT
CREEK...OAKLAND PARK...LAUDERDALE LAKES...DANIA BEACH...PARKLAND...
WILTON MANORS...HILLSBORO BEACH AND SEA RANCH LAKES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FUNNEL CLOUDS OCCASIONALLY TOUCH DOWN AND PRODUCE TORNADOES. MOVE
INDOORS AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 2610 8010 2610 8011 2612 8011 2611 8012
2608 8011 2605 8011 2605 8012 2604 8012
2604 8017 2638 8022 2648 8005
TIME...MOT...LOC 1817Z 225DEG 16KT 2623 8015 2594 8014
GREGORIAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
226 PM EDT FRI SEP 18 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0210 PM MARINE TSTM WIND KEY BISCAYNE 25.69N 80.17W
09/18/2015 M40 MPH MIAMI-DADE FL MESONET
&&
EVENT NUMBER MFL1500333
KMThe Miami radar (KAMX), 27 km away, was scanning. The volume nearest the first event began at 22:35 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a 29-foot boat at a marina on the Miami River near NW 17th Avenue which started a fire and caused significant damage to the boat. No injuries were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2015Every state in 2015This day in weather historyWarnings in Florida, September 2015
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 596512.