Moist westerly flow and an upper level trough over North Florida led to the development of severe thunderstorms over Southeast Florida and the adjacent Atlantic waters. A total of 23,000 people lost power as a result of the storms, mostly in Broward County.
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.
Moist westerly flow and an upper level trough over North Florida led to the development of severe thunderstorms over Southeast Florida and the adjacent Atlantic waters. A total of 23,000 people lost power as a result of the storms, mostly in Broward County.
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 Jun 30, 1:27 PM EST, 13 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 227 PM EDT THU JUN 30 2011 .AVIATION...THRU. 00Z SAT. SCATTERED SHOWERS AND STORMS WILL REMAIN IN THE FORECAST THROUGH THE AFTERNOON AND EVENING HOURS...WHICH MAY RESULT IN BRIEF MVFR PERIODS WHILE OVER OR AROUND THE TERMINALS. THIS ACTIVITY WILL LINGER WELL INTO THE EVENING BEFORE DYING DOWN AS AN UPPER TROUGH NORTH OF THE AREA AND WEAK SURFACE REFLECTION CONTINUE TO INFLUENCE THE LOCAL WEATHER CONDITIONS. VERY SIMILAR CONDITIONS WILL BE PRESENT THROUGH THE DAY FRIDAY AS THIS WEAK SURFACE BOUNDARY CONTINUES TO DROP SOUTH ACROSS THE FLORIDA PENINSULA. 85/AG && .PREV DISCUSSION... /ISSUED 1013 AM EDT THU JUN 30 2011/ DISCUSSION... THE SHORT TERM FORECAST WAS UPDATED FOR THE REST OF TODAY...MAINLY TO UPDATE CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS THE REGION. THE 12Z SOUNDING INDICATED LOW LEVEL EASTERLY FLOW IN THE LOWEST LEVELS AND THEN SOUTHWESTERLY FLOW AROUND 5 TO 15 KFT...A CHANGE FROM PREVIOUS DAYS. THE PWAT IS AROUND 2 INCHES...A DECREASE OF ABOUT 0.2 TO 0.3 INCHES FROM THE LAST COUPLE OF DAYS. THE UPDATED FORECAST INCLUDED A SLIGHT INCREASE IN THE POPS ACROSS THE REGION. THE 12Z SOUNDING INDICATED A COOLING TREND IN THE MID LEVELS AND THE LAPSE RATES IN THE LOWER LEVELS INDICATES SOME INCREASE IN INSTABILITY FROM PREVIOUS DAYS. ALTHOUGH CONSIDERABLE CLOUD COVERAGE ACROSS THE REGION WILL DECREASE MAX TEMPERATURES TODAY...ANY LOCAL BREAKS IN THE CLOUDINESS COULD ALLOW FOR CONVECTION TO BE INITIATED...SIMILAR TO EARLY YESTERDAY AFTERNOON. IN ADDITION THERE ARE STILL SOME LINGERING BOUNDARIES ACROSS THE REGION. LASTLY...GIVEN THE PRESENCE OF LOW LEVEL CLOUD CONVERGENCE BANDS ACROSS THE LOCAL GULF AND ATLANTIC WATERS AND THE WEAK LOW LEVEL WESTERLY SHEAR THERE IS A CHANCE OF WATERSPOUTS ACROSS THE REGIONAL WATERS. 60 PREV DISCUSSION... /ISSUED 733 AM EDT THU JUN 30 2011/ AVIATION... THE REGION IS MUCH MORE STABLE THAN THIS TIME YESTERDAY DUE TO THE RAINFALL ON WEDNESDAY. THE DEEP TROPICAL MOISTURE WILL ALSO GET PUSHED TO THE NORTH OF THE REGION AND SLIGHTLY DRIER AIR IN THE LOW/MID LEVELS IS EXPECTED TO MOVE IN FROM THE SOUTHEAST. WILL LEAVE VCSH FOR KPBI THIS MORNING AS THERE ARE LIGHT SHOWERS AROUND. THE MORE STABLE CONDITIONS...MID/HIGH CLOUDS OVER THE REGION AND DRIER AIR WILL LIKELY DELAY TSTORM DEVELOPMENT UNTIL THIS AFTERNOON WITH LESS COVERAGE OF TSTORMS ACROSS THE REGION. THEREFORE...PUSHED BACK THE VCTS TO AFTER 18Z FOR THE TAF SITES...AND ONLY HAVE VCSH WITH CB FOR KAPF. CONVECTION IS EXPECTED TO WIND DOWN AFTER 00Z WITH LIGHT WINDS EXPECTED OVERNIGHT. PREV DISCUSSION... /ISSUED 325 AM EDT THU JUN 30 2011/ DISCUSSION...WATER VAPOR IMAGERY SHOWS A TROUGH ALONG THE EASTERN SEABOARD OF THE UNITED STATES...EXTENDING ALL THE WAY DOWN INTO NORTH FLORIDA. THE WEAK ATLANTIC RIDGE LIES ACROSS THE KEYS/STRAITS. THE PATTERN OVER THE NEXT FEW DAYS WILL CONTINUE WITH THIS MID/UPPER LEVEL TROUGH MOVING INTO CENTRAL FL WITH THE WEAK ATLANTIC RIDGE NEAR OR JUST SOUTH OF THE AREA. MOISTURE LOOKS TO DECREASE IN THE LOWER LEVELS THIS AFTERNOON...AND THIS SHOULD RESULT IN MORE SCATTERED ACTIVITY AS OPPOSED TO THE WIDESPREAD ACTIVITY SEEN YESTERDAY. STEERING FLOW IS SW...SO HAVE HIGHEST POPS INTERIOR AND EAST COAST TODAY. MODEL CONSENSUS IS FOR CENTRAL FLORIDA TO SEE THE MOST NUMEROUS ACTIVITY THIS AFTERNOON...WITH SOUTH FL SEEING LESS DUE TO THE POCKET OF LOW LEVEL DRY AIR. ALSO...SHOULD MENTION THAT WE HAVE STABILIZED FROM YESTERDAY'S CONVECTION...WITH TEMPS AND DEWPOINTS SOME 5F LOWER FROM THIS TIME YESTERDAY. IT WILL TAKE SOME TIME TO RECOVER...SO NOT EXPECTING MUCH ACTIVITY UNTIL THE AFTERNOON...UNLIKE PREVIOUS DAYS. THE TREND FOR THE UPCOMING WEEKEND IN THE LAST FEW RUNS OF THE GFS AND ECMWF ARE NOT GOOD...IF YOU WANT IT DRIER WITH MORE SUN THIS HOLIDAY WEEKEND. BECAUSE BOTH MODELS LAG THE AFOREMENTIONED TROUGH ACROSS SOUTH FLORIDA WITH A CONTINUED BAND OF MID LEVEL CLOUDINESS AS WELL AS SUFFICIENT MOISTURE IN THE LOWER LEVELS TO RESULT IN AT LEAST SCATTERED CONVECTION EACH DAY. HAVE TRENDED THE FORECAST FOR THE HOLIDAY WEEKEND TOWARDS THIS SCENARIO...BUT NOT AS PESSIMISTIC AS THE MODELS SHOW. THE FORECAST SKY COVER AND POPS MAY NEED FURTHER INCREASING IF THESE CLOUDIER AND WETTER TRENDS CONTINUE. FOR EARLY NEXT WEEK THE QUESTION IS HOW MUCH MOISTURE WILL MOVE INTO SOUTH FL ASSOCIATED WITH A TROPICAL WAVE. THE LATEST ECMWF RUN IS VERY WET TUE-THU OF NEXT WEEK...BRINGING A SLUG OF DEEP TROPICAL MOISTURE NORTHWARD FROM THE CARIB...WITH PWATS INCREASING TO ABOUT 1.4 INCHES AND NO DOUBT A MORE WIDESPREAD HEAVY RAIN POTENTIAL. HOWEVER...THE GFS IS NOT NEARLY AS AGGRESSIVE. SO NEAR CLIMO POPS LOOKS GOOD FOR NOW GIVEN THIS UNCERTAINTY. MARINE...SSE WINDS 10-15 KT TODAY WILL SUBSIDE OVER THE UPCOMING WEEKEND. SEAS WILL CONTINUE LOW THROUGHOUT THE PERIOD. FIRE WEATHER...NO CONCERNS. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 75 88 75 87 / 40 50 30 40 FORT LAUDERDALE 78 89 78 87 / 30 40 30 40 MIAMI 77 89 76 88 / 30 40 30 40 NAPLES 75 87 75 89 / 30 50 30 40 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. && DISCUSSION/MARINE...60/BD AVIATION/RADAR/FIRE...85/AG
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 333 AM EDT THU JUN 30 2011 FLZ063-066>075-168-172>174-302245- 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- 333 AM EDT THU JUN 30 2011 ...A FEW STRONG THUNDERSTORMS POSSIBLE TODAY... ...LOCALLY HEAVY RAINFALL POSSIBLE... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS: SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON THROUGH THE EARLY EVENING. A FEW OF THE THUNDERSTORMS COULD BECOME STRONG, CONTAINING FREQUENT LIGHTING STRIKES AND STRONG GUSTY WINDS. HEAVY RAINS WILL ACCOMPANY THE STORMS AS WELL. WIND: THE STRONGEST THUNDERSTORMS TODAY WILL BE CAPABLE OF PRODUCING WIND GUSTS TO AROUND 50 MPH. FLOODING: LOCALLY HEAVY RAINFALL WILL BE POSSIBLE IN SOME SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING. SLOW STORM MOVEMENT MAY RESULT IN MINOR STREET FLOODING IN SOME LOCALES. RIP CURRENTS: THERE IS A SLIGHT RISK OF RIP CURRENTS AT THE LOCAL ATLANTIC BEACHES DUE TO A SOUTHEAST WIND NEAR 10 MPH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH DAY...WITH THE PRIMARY RISK BEING LIGHTNING STRIKES...GUSTY WINDS AND HEAVY DOWNPOURS. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND, HAIL 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.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 234 PM EDT THU JUN 30 2011 FLZ071>074-301900- INLAND BROWARD COUNTY FL INLAND MIAMI-DADE COUNTY FL METRO BROWARD COUNTY FL METROPOLITAN MIAMI DADE FL 234 PM EDT THU JUN 30 2011 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SIGNIFICANT WEATHER ADVISORY FOR... SOUTH CENTRAL BROWARD COUNTY NORTHEASTERN MIAMI-DADE COUNTY * UNTIL 300 PM EDT * AT 230 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM NEAR CORAL GABLES. THIS STORM WAS MOVING NORTHEAST AROUND 5 MPH. FREQUENT LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP TO NICKEL-SIZED HAIL...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. LAT...LON 2612 8053 2610 8019 2575 8025 2577 8044 TIME...MOT...LOC 1833Z 180DEG 0KT 2572 8026 85-GIBBS
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
237 PM EDT THU JUN 30 2011
FLZ067-068-072-168-172-301900-
COASTAL BROWARD COUNTY FL COASTAL PALM BEACH COUNTY FL INLAND PALM
BEACH COUNTY FL METRO BROWARD COUNTY FL METRO PALM BEACH COUNTY FL
237 PM EDT THU JUN 30 2011
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SIGNIFICANT WEATHER ADVISORY FOR...
NORTHEASTERN BROWARD COUNTY
SOUTHEASTERN PALM BEACH COUNTY
* UNTIL 300 PM EDT
* AT 230 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM NEAR BOCA RATON...AND MOVING NORTHEAST AT 5
MPH.
* THE STORM WILL AFFECT...
RURAL SOUTHEASTERN PALM BEACH COUNTY
AND SURROUNDING COMMUNITIES.
FREQUENT LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP TO
NICKEL-SIZED HAIL...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.
LAT...LON 2650 8005 2643 8005 2640 8006 2639 8006
2626 8007 2628 8023 2655 8017 2653 8004
TIME...MOT...LOC 1837Z 225DEG 4KT 2639 8009
85-GIBBSThe Miami radar (KAMX), 50 km away, was scanning. The volume nearest the first event began at 18:39 UTC.
9 thunderstorm wind. Local standard time, as filed.
A 61 mph wind gust was reported by mesonet located at the intersection of Griffin and Bonaventure. Power Lines were also down on Griffin Rd between Bonaventure and SW 192nd AVE.
An off duty meteorologist estimated a wind gust of 60 mph in Weston on ST Tropez Circle.
A mesonet recorded a wind gust of 64 MPH. Power lines were downed in the area around Middle River Drive and NE 21 Street.
A mesonet recorded a wind gust of 61 MPH.
Media reported a gust of 72 MPH at a mesonet at north Broward Medical Center. Power lines and trees down near Pompano Business Park.
Power lines downed in Broward Boulevard area of Fort Lauderdale.
Power lines down.
Power lines down.
The Law Real Estate sign was blown down onto Federal highway in Boynton Beach.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2011Every state in 2011This day in weather historyWarnings in Florida, June 2011
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: 319922, 319924, 319929, 319930, 319925, 319919, 319921, 320374, 319932.