A moist and unstable airmass caused 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.
A moist and unstable airmass caused 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 10, 12:30 PM EST, 1 hour earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 130 PM EDT THU SEP 10 2015 .AVIATION... MOSTLY VFR CONDITIONS ARE EXPECTED THROUGH THE FORECAST. AFTERNOON CONVECTION IS BEGINNING TO DEVELOP ALONG THE SEA BREEZE BOUNDARIES BUT IS STRUGGLING TO GROW DUE TO WARM TEMPERATURES ALOFT. STEERING FLOW IS ALSO VERY WEAK SO STORMS WILL PULSE QUICKLY FOR THE NEXT FEW HOURS SO HAVE HELD THE VCTS THROUGH 21Z ALONG THE EAST COAST BEFORE MOVING FARTHER INLAND. SIMILAR PATTERN IS EXPECTED EARLY FRIDAY BEFORE SEA BREEZE FORMATION. && .PREV DISCUSSION... /ISSUED 1033 AM EDT THU SEP 10 2015/ UPDATE... DEEP LAYER RIDGE IS CURRENTLY NEARLY STATIONARY ACROSS SOUTH FLORIDA ALTHOUGH MODELS ARE SUGGESTING IT WILL SHIFT SLOWLY TO THE SOUTH THROUGH THIS AFTERNOON. THIS MAY ALLOW THE 500MB TEMPERATURE TO COOL SLIGHTLY BY THEN, HOWEVER FROM THE 12Z MFL SOUNDING THIS MORNING SHOWS IT HAS NOT CHANGED FROM YESTERDAY AND REMAINS AT A FAIRLY WARM -5.3C. THIS IS MORE THAN A DEGREE ABOVE THE NORMAL FOR THIS DATE. ALSO, THE SOUNDING SHOWS A STRONG SURFACE INVERSION THIS MORNING SO IT IS TAKING TIME FOR THE CAP TO BREAK AND CONVECTION OVER THE MAINLAND HAS YET TO BEGIN WHEREAS YESTERDAY WE ALREADY CONVECTIVE DEVELOPMENT ALONG THE EAST COAST. DO NOT EXPECT MUCH CHANGE FROM YESTERDAY WITH THE WARM TEMPERATURES ALOFT AND THE MEAGER MID LEVEL LAPSE RATES REMAINING BELOW 6C/KM SO SHOWERS AND STORMS WILL CONTINUE TO STRUGGLE GETTING STARTED TODAY. THERE COULD BE SOME INCREASE IN COVERAGE AS THE PWAT DID CLIMB BACK OVER 2" BUT OVERALL THE STORMS SHOULD BE YOUR TYPICAL SUMMER AFTERNOON VARIETY. THE STORMS WILL ALSO MOSTLY BE CONFINED OVER THE INTERIOR AS STEERING FLOW REMAINS VERY WEAK AND WILL BE FOCUSED ON SEA BREEZE BOUNDARIES BUT EARLY DEVELOPMENT ESPECIALLY OVER THE EAST COULD BEGIN JUST INLAND FROM THE COAST BEFORE SHIFTING TO THE NORTHWEST. KOB PREV DISCUSSION... /ISSUED 814 AM EDT THU SEP 10 2015/ AVIATION... SOME SLIGHT COOLING ALOFT IS EXPECTED TODAY AS THE UPPER RIDGE SHIFTS SLOWLY TO THE SOUTH. THIS COULD LEAD TO A MORE ACTIVE DAY FOR CONVECTION THAN THE PAST COUPLE OF DAYS, HOWEVER THE STEERING FLOW IS STILL VERY WEAK SO EARLY MORNING SHOWERS MAY MOVE ONSHORE THIS MORNING WITH ADDITIONAL STORM DEVELOPMENT ALONG THE SEA BREEZE BOUNDARIES AND THEN PUSH INLAND AWAY FROM THE TERMINALS. SO MOSTLY VFR CONDITIONS ARE ANTICIPATED WITH SURFACE WIND BECOMING L/V AFT 00-02Z THIS EVENING. KOB PREV DISCUSSION... /ISSUED 342 AM EDT THU SEP 10 2015/ DISCUSSION... TODAY-TONIGHT...MID-UPPER LEVEL RIDGE DIRECTLY OVER FLORIDA PENINSULA WILL SLOWLY GET SUPPRESSED SOUTHWARDS TODAY WITH LOW LEVEL RIDGE AXIS REMAINING DIRECTLY OVER SOUTH FLORIDA. 00Z SOUNDING SHOWED 500MB TEMPS AN RATHER WARM -4.7C AND MODELS SHOW SOME SLIGHT COOLING ALOFT TOWARDS THE AFTERNOON WITH THE APPROACH OF THE NEXT TROUGH INTO THE FL PENINSULA. HOWEVER TEMPS REMAIN FAIRLY WARM TO NORMAL AT -6C WITH LAPSE RATES AROUND 5.5 C/KM. STEERING FLOW WILL BE LIGHT SOUTH TO SOUTH-SOUTHWEST AROUND THE LAKE. OVERALL..EXPECT A FAIRLY SIMILAR PATTERN TO WEDNESDAY WITH A FEW STORMS ALONG THE SEA BREEZES AS THEY PUSH INLAND AND THE BEST RAIN CHANCES OVER THE INTERIOR DURING THE AFTERNOON AND EARLY EVENING HOURS. MAINLY MARINE ACTIVITY OVERNIGHT WITH THE SOUTHERLY FLOW BRINGING A FEW ONSHORE. FRIDAY...RIDGE AXIS CONTINUES TO ERODE AS LARGER UPPER LEVEL TROUGH MOVES INTO THE EASTERN US AND WEAKER SHORTWAVE MOVES THROUGH THE DEEP SOUTH. THESE FEATURES WILL BRING A COLD FRONT INTO THE SOUTHEAST AND NORTH FLORIDA BY LATE IN THE DAY. FORECAST SOUNDINGS INDICATE A COOLING TREND IN THE MID LEVEL TEMPERATURES WITH A GENERAL INCREASE IN REGIONAL INSTABILITY. WE WILL SEE AN INCREASE IN COVERAGE OF SHOWERS/THUNDERSTORMS FORECAST ACROSS REGION...MOST NOTABLY ALONG THE EAST COAST METRO AS SEA BREEZE WILL BE SLOWER TO MOVE INLAND. SATURDAY-SUNDAY...UNSETTLED PATTERN RETURNS JUST IN TIME FOR THE WEEKEND AS LARGE TROUGH ACROSS THE EASTERN US CONTINUES TO DEEPEN WITH WEAKER SHORTWAVES ROTATING AROUND ITS BASE INTO THE SOUTHEAST AND FLORIDA PENINSULA. WEAK SURFACE FRONTAL BOUNDARY MANAGES TO MAKE ITS WAY INTO AT LEAST CENTRAL...MAYBE SOUTH FLORIDA INTO SUNDAY. WITH THESE FEATURES WE WILL SEE AN INCREASE IN DEEP MOISTURE ACROSS THE REGION ALONG WITH COOLER TEMPERATURES ALOFT AND STEEPENING LAPSE RATES. AN INCREASE IN THE SOUTH-SOUTHWEST STEERING FLOW IS FORECAST TO HOLD BACK THE EAST COAST SEA BREEZE BOTH DAYS WITH NUMEROUS SHOWERS AND STORMS BOTH AFTERNOONS CONCENTRATING TOWARDS THE EAST COAST...ESPECIALLY AROUND LAKE OKEECHOBEE AND PALM BEACH COUNTY. LONG TERM (MONDAY-WEDNESDAY)...DEEP EAST COAST TROUGH LIFTS OUT EARLY NEXT WEEK WITH BOTH THE GFS AND ECMWF IN GOOD AGREEMENT ON REBUILDING THE UPPER LEVEL RIDGE BACK INTO THE STATE. LOW LEVEL BOUNDARY OVER FLORIDA ALSO WASHES OUT AND THE STATE WILL COME UNDER THE INFLUENCE OF HIGH PRESSURE OVER MID-ATLANTIC LEADING TO LOW LEVEL EASTERLY FLOW. SOME DISAGREEMENT ON HOW MUCH...IF ANY DRYING OCCURS WITH THIS PATTERN SHIFT...SO OVERALL RAIN CHANCES REMAIN NEAR NORMAL WITH SCATTERED AFTERNOON ACTIVITY. MARINE... SURFACE RIDGE AXIS OVERHEAD TODAY WILL BRING LIGHT SOUTHEAST FLOW 10KTS OR LESS. THE GULF COAST SEA BREEZE WILL DEVELOPING IN THE AFTERNOON VEERING WINDS TO THE SOUTHWEST ALONG THE COLLIER COUNTY COAST. WINDS VEER MORE SOUTHERLY ON FRI AND SAT WITH A MODEST INCREASE TO A STEADY 10KTS...THOUGH GULF COAST SEA BREEZE IS STILL EXPECTED TO FORM FRIDAY AFTERNOON. WINDS BECOME LIGHT AND VARIABLE INTO SUNDAY AS FRONTAL BOUNDARY DROPS INTO THE STATE. WINDS INCREASE OUT OF THE EAST-NORTHEAST DURING THE DAY ON MONDAY BEHIND THE BOUNDARY WITH SPEEDS POSSIBLY COMING UP TO 10-15KTS...ESPECIALLY OVER THE ATLANTIC. SEAS GENERALLY AROUND 1FT...THOUGH IF STRONGER WINDS MATERIALIZE ON MONDAY SEAS MAY COME UP TO 2-3FT. AFTERNOON STORMS WILL MAINLY BE OVER THE INTERIOR TODAY AND FRIDAY...WITH SOUTHWEST STEERING FLOW MOVING STORMS OFF THE EAST COAST DURING THE AFTERNOON AND EVENING OVER THE WEEKEND. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 78 92 77 91 / 20 40 30 60 FORT LAUDERDALE 80 91 79 91 / 20 40 20 60 MIAMI 79 92 78 90 / 20 40 20 60 NAPLES 78 90 77 90 / 20 30 40 40 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. && SHORT TERM...10/CD LONG TERM....10/CD AVIATION...10/CD
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 1224 PM EDT THU SEP 10 2015 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 110430- 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- 1224 PM EDT THU SEP 10 2015 ...SCATTERED TO NUMEROUS THUNDERSTORMS INTERIOR THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS: SCATTERED TO NUMEROUS THUNDERSTORMS WILL AFFECT MUCH OF SOUTH FLORIDA TODAY...WITH THE HIGHEST CONCENTRATION OVER INTERIOR SECTIONS LATER THIS AFTERNOON. THE MAIN THREATS WILL BE CLOUD TO GROUND LIGHTNING AND GUSTY WINDS. TEMPERATURES: HEAT INDEX VALUES WILL REACH 100 TO 105 DEGREES TODAY OVER ALL OF SOUTH FLORIDA. WATERSPOUTS: THERE IS A SLIGHT RISK OF A WATERSPOUT OVER THE GULF AND ATLANTIC WATERS WITH LINES OF SHOWERS AND STORMS OR DEVELOPING CUMULUS CLOUDS. WIND: THE STRONGEST THUNDERSTORMS ARE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH...MAINLY OVER INTERIOR SECTIONS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY DAILY THUNDERSTORMS ARE EXPECTED INTO NEXT WEEK...WITH AN INCREASE IN COVERAGE AREA-WIDE FRIDAY THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND AND FLOODING TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.
The Miami radar (KAMX), 119 km away, was scanning. The volume nearest the first event began at 18:27 UTC.
1 lightning. Local standard time, as filed.
Palm Beach County Fire Rescue reported damage to a Wellington Petco roof with debris from the lightning strike on the ground. Store is located at 920 S. State Road 7. There were no injuries 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: 596331.