A third consecutive day of severe weather affected South Florida as a stationary upper level trough interacted with a surface trough over extreme South Florida.
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 third consecutive day of severe weather affected South Florida as a stationary upper level trough interacted with a surface trough over extreme South Florida.
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 May 27, 9:04 AM EST, 2 hours 36 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 1004 AM EDT WED MAY 27 2009 ...A FEW SEVERE STORMS POSSIBLE LAKE REGION AND ACROSS THE EAST COAST METROPOLITAN AREAS THIS AFTERNOON... .UPDATE...ANOTHER ACTIVE AFTERNOON IS EXPECTED WITH THUNDERSTORMS FOCUSING FROM THE LAKE OKEECHOBEE REGION TO THE EAST COAST METROPOLITAN AREAS. THERE IS A SUBTLE SURFACE BOUNDARY STRETCHING FROM ACROSS CAPE SABLE TO THE UPPER KEYS...WITH SW FLOW NORTH OF THIS BOUNDARY AND S FLOW TO THE SOUTH OF IT. ASIDE FROM THIS BOUNDARY...SEA AND LAKE BREEZES WILL ACT ON THE INSTABILITY TO ALLOW THUNDERSTORMS TO DEVELOP RAPIDLY AGAIN THIS AFTERNOON. THE MORNING MIAMI SOUNDING SHOWS PARAMETERS SIMILAR TO YESTERDAY WITH MAX AFTERNOON CAPE OF NEAR 3700 J/KG AND AN LI NEAR -8C. STORM MOTION WILL BE W NEAR 5 KT...SO ONCE STORMS DEVELOP...MOTION WILL BE BACK TOWARDS THE ATLANTIC COAST. DECIDED TO INCREASE POPS TO 70 PERCENT FOR THE LAKE OKEECHOBEE REGION AND 80 PERCENT ACROSS THE EAST COAST METRO AREAS WHERE CONVERGENCE WILL BE BEST ALONG THE DEVELOPING ATLANTIC SEA BREEZE. THERE HAVE BEEN ISOLATED SEVERE REPORTS OVER THE PAST FEW DAYS...AND PARAMETERS SUGGEST THIS POSSIBILITY AGAIN THIS AFTERNOON...SO WE ACCOUNTED FOR THIS POTENTIAL IN THE UPDATED HAZARDOUS WEATHER OUTLOOK...ALONG WITH THE HEAVY RAIN AND HIGH LIGHTNING POTENTIAL. /DG && .PREV DISCUSSION... /ISSUED 750 AM EDT WED MAY 27 2009/ AVIATION...E COAST TERMINALS...VFR THRU 18Z. CRNTLY CALM WINDS BCMG SW 4-6 KTS 12Z-15Z THEN E COAST SEA BREEZE KICKS IN SE 10-12KTS. AFT 18Z VCTS ALL E COAST TERMINALS WITH MVFR CIG/VSBY XPCTD IN HVY RA WITH GUSTY WNDS THRU 22Z...BUT VCTS IN TAFS ATTM AS INDETERMINATE IF TERMINALS WILL BE DIRECTLY AFFECTED. VFR FM 22Z TO REMAINDER OF PD. AT KAPF...VFR THRU PD. WIND E LESS THAN 5 KT BCMG SW ARND 10 KT AFT 15Z AS W COAST SEA BREEZE DVLPS. VCTS 18Z-22Z THEN ACTIVITY WELL E OF TERMINAL REMAINDER OF PD. LGT ENE DRAINAGE WIND DVLPS AFT 02Z. JR/AT PREV DISCUSSION... /ISSUED 324 AM EDT WED MAY 27 2009/ DISCUSSION...LARGE SCALE TROUGH ACROSS THE SOUTHEAST STATES WILL CONTINUE THROUGH THE SHORT TERM AND POSSIBLY INTO THE EXTENDED. DEEP SOUTHWEST FLOW WILL KEEP THE INTERIOR AND EAST COAST PORTIONS OF THE CWA IN THE MOST FAVORABLE ENVIRONMENT FOR AFTERNOON CONVECTION WITH SOME STRONG STORMS POSSIBLE. ALL MODELS IN GENERAL AGREEMENT AS FAR AS THE OVERALL SYNOPTIC PATTERN BUT REALLY DIVERGE IN OTHER AREAS. FIRST OF ALL, THE NAM HAS BEEN OUTPERFORMING THE GFS FOR POP GUIDANCE DURING THE PAST FEW DAYS SO AGAIN WILL LEAN CLOSER TO MET GUIDANCE FOR TODAY. LOOKING AT THE OVERALL PATTERN AND THE FORECAST SOUNDINGS DOES NOT SHOW ANY DIFFERENCE THAN WHAT HAS OCCURRED SINCE EARLY THIS WEEK. WE ALSO WILL SEE STRONG DIURNAL HEATING TAKE PLACE THIS MORNING AS THE SKY WILL BE MOSTLY FREE OF CLOUDS. SECONDLY, THE GFS SEEMS TO BE SUFFERING FROM CONVECTIVE FEEDBACK WITH THIS STRONG SOUTHEAST U.S. TROUGH AS IT CONTINUES TO SPIN UP SURFACE FEATURES. ONE SUCH FEATURE IS THAT SEVERAL WEAK SHORT WAVES HAVE BEEN ROTATING THROUGH THE BASE OF THE TROUGH ENHANCING SOME OF OUR CONVECTION. IT SHOWS A STRONG SHORT WAVE MOVING ACROSS SOUTH FLORIDA ON FRIDAY AND THEN SPINS UP A SURFACE LOW OVER THE EASTERN GULF OF MEXICO. NEITHER THE NAM NOR THE ECMWF INDICATE THIS WAVE. SO FOR THE TIME BEING, WILL GO WITH LIKELY POPS EASTERN HALF OF THE REGION BOTH THIS AFTERNOON AND AGAIN ON THURSDAY WITH SCATTERED POPS ON FRIDAY UNTIL WE GET A BETTER FEEL WHETHER OR NOT ANY SHORT WAVE WILL HAVE AN INFLUENCE. ONE THING IS FOR CERTAIN, IF THE GFS IS SEEING SOMETHING THE OTHER MODELS ARE NOT, IT COULD BE A VERY ACTIVE CONVECTIVE DAY ON FRIDAY SO THIS WILL BE WATCHED CLOSELY FOR SURE. IN THE EXTENDED, MODELS ARE NOT QUITE SURE HOW MUCH PUSH THIS TROUGH WILL HAVE WITH THE NAM SIGNIFICANTLY DRYING US OUT BY LATE FRIDAY INTO SATURDAY WITH THE GFS AND ECMWF MUCH SLOWER. SO FOR THIS REASON, HAVE KEPT SCATTERED POPS FOR THIS WEEKEND. THE GFS THEN SHOWS THE RIDGE BUILDING BACK IN ACROSS SOUTH FLORIDA EARLY NEXT WEEK SO CONVECTIVE DEVELOPMENT WILL GO BACK TO FORMING ALONG SEA BREEZE BOUNDARIES WITH THE ACTIVITY CONCENTRATED OVER THE INTERIOR ZONES AWAY FROM BOTH COASTS. MARINE...LIGHT SOUTH TO SOUTHWEST WINDS WILL CONTINUE THROUGH THE PERIOD AS THE RIDGE REMAINS ACROSS THE FLORIDA KEYS. THIS WILL KEEP SEAS LESS THAN 4 FEET THROUGH EARLY NEXT WEEK. FIRE WEATHER...NO PROBLEMS OR CONCERNS. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 87 72 85 72 / 80 40 60 30 FORT LAUDERDALE 87 74 86 74 / 80 40 60 30 MIAMI 89 73 87 73 / 80 40 60 30 NAPLES 87 72 86 72 / 30 30 30 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. &&
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 930 AM EDT WED MAY 27 2009 FLZ063-066>075-168-172>174-280345- 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- 930 AM EDT WED MAY 27 2009 ...SCATTERED TO NUMEROUS THUNDERSTORMS TODAY MAINLY INTERIOR AND EAST... ...ISOLATED SEVERE STORMS POSSIBLE INTERIOR AND EAST... ...LOCAL FLOODING POSSIBLE DUE TO HEAVY RAINS EAST COAST METRO... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS: SCATTERED TO NUMEROUS THUNDERSTORMS WILL AFFECT SOUTH FLORIDA TODAY AND INTO EARLY THIS EVENING. MOST ACTIVITY WILL LIKELY OCCUR ALONG THE EAST COAST AND ACROSS THE LAKE REGION. LOCALLY HEAVY RAINS ,FREQUENT LIGHTNING STRIKES, GUSTY WINDS, AND POSSIBLE HAIL CAN BE EXPECTED. ISOLATED THUNDERSTORMS WILL BE POSSIBLE ALONG THE WEST COAST AND THESE STORMS MAY BE ACCOMPANIED WITH OCCASIONAL LIGHTNING AND A BRIEF HEAVY DOWNPOUR. WIND: WIND GUSTS TO 60 MPH WILL BE POSSIBLE IN THE STRONGER THUNDERSTORMS OVER THE INTERIOR, LAKE OKEECHOBEE REGION, AND EAST COAST. HAIL: NICKEL-SIZED HAIL WILL BE POSSIBLE IN THE THUNDERSTORM ACTIVITY OVER THE INTERIOR, LAKE OKEECHOBEE REGION, AND EAST COAST. FLOODING: THE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL IN A SHORT PERIOD OF TIME. THE THUNDERSTORMS WILL BE SLOW MOVING AND WITH SOILS ALREADY SATURATED FROM RAINS THE PAST FEW DAYS, THIS COULD LEAD TO LOCALIZED FLOODING OF LOW LYING AND FLOOD PRONE AREAS ESPECIALLY IN THE EAST COAST METRO. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED EACH AFTERNOON THROUGH THE COMING WEEK WITH SOME ISOLATED STRONG TO POSSIBLY SEVERE STORMS POSSIBLE THROUGH THE END OF THIS WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1131 AM EDT WED MAY 27 2009 FLZ073-271600- INLAND MIAMI-DADE FL- 1131 AM EDT WED MAY 27 2009 ...STRONG THUNDERSTORM MOVING ACROSS SHARK VALLEY TOWER... AT 1128 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR SHARK VALLEY OBS TOWER...MOVING NORTHEAST AT 5 MPH. THIS STORM WILL AFFECT... TAMIAMI TRAIL BETWEEN 40 MILE BEND AND THE MICCOSUKEE RESORT AND SURROUNDING AREAS. FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS TO 50 MPH...DIME-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. WIND GUSTS OF UP TO 50 MPH 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 2590 8074 2577 8056 2563 8077 2570 8083 TIME...MOT...LOC 1529Z 214DEG 6KT 2570 8077 TINGLER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1159 AM EDT WED MAY 27 2009 FLZ073-173-271630- INLAND MIAMI-DADE FL-COASTAL MIAMI-DADE COUNTY FL- 1159 AM EDT WED MAY 27 2009 ...STRONG THUNDERSTORMS MOVING ACROSS THE REDLAND... AT 1156 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST OF HOMESTEAD GENERAL AIRPORT TO HOMESTEAD...MOVING NORTHEAST AT 10 MPH. THESE STORMS WILL AFFECT... HOMESTEAD GENERAL AIRPORT... REDLAND... THE REDLAND... NARANJA... AND SURROUNDING COMMUNITIES. FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS OF 40 TO 50 MPH...DIME-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. WIND GUSTS OF UP TO 50 MPH 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 2569 8056 2556 8039 2544 8051 2555 8068 TIME...MOT...LOC 1558Z 235DEG 8KT 2557 8063 2548 8050 TINGLER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 1206 PM EDT WED MAY 27 2009 FLZ073-075-271630- MAINLAND MONROE FL-INLAND MIAMI-DADE FL- 1206 PM EDT WED MAY 27 2009 ...STRONG THUNDERSTORM MOVING ACROSS MAINLAND MONROE COUNTY... AT 1205 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 10 MILES NORTHWEST OF PA-HAY OKEE OVERLOOK... MOVING NORTHEAST AT 10 MPH. FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS OF 40 TO 50 MPH...DIME-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. WIND GUSTS OF UP TO 50 MPH 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 2567 8095 2561 8075 2544 8089 2550 8099 TIME...MOT...LOC 1605Z 207DEG 8KT 2551 8092 TINGLER
The Miami radar (KAMX), 6 km away, was scanning. The volume nearest the first event began at 16:38 UTC.
5 thunderstorm wind, 4 hail. Local standard time, as filed.
A WeatherBug site at Coral Reef Senior High School in South Miami-Dade County recorded a pair of 60 mph wind gusts with a passing thunderstorm.
Penny sized hail fell for 10 minutes with a passing storm.
The same storm that produced a report of penny sized hail in South Miami also prompted a report of a wind gust to 60 mph.
A report was receive of a wind gust to 60 mph in Coconut Grove with a passing thunderstorm.
A mesonet site located at Coral Glades High School recorded a wind gust of 60 mph with a thunderstorm.
A spotter reported one inch in diameter hail in Boca Raton.
A city of Boca Raton official reported trees down from wind gusts on NW 4th Street. County wide, around 3,000 homes and businesses lost power from these afternoon thunderstorms according to Florida Power and Light..
A spotter reported that hail fell for about four minutes and ranged from pea to the size of quarters in Boca Raton.
The Boynton Beach PD reported nickel sized hail and wind gusts to around 40MPH.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2009Every state in 2009This day in weather historyWarnings in Florida, May 2009
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: 174484, 174485, 174486, 174487, 174488, 174489, 174490, 174491, 174492.