Established southwesterly flow, combined with plentiful low-level moisture, allowed for scattered to numerous showers and thunderstorms to move towards the east coast metro in the afternoon. Heavy rainfall rates associated with these storms lead to flooding of streets across areas of Broward and Miami-Dade Counties.
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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.
Established southwesterly flow, combined with plentiful low-level moisture, allowed for scattered to numerous showers and thunderstorms to move towards the east coast metro in the afternoon. Heavy rainfall rates associated with these storms lead to flooding of streets across areas of Broward and Miami-Dade Counties.
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 Aug 13, 9:05 AM EST, 4 hours 25 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 1005 AM EDT Tue Aug 13 2019 .UPDATE... Mainly south-southwesterly winds continue this morning in the 5-10 kt range. As in previous days, the two key players for today's convection will again be the interaction between the synoptic flow and the Atlantic sea breezes, and the abundant low level moisture lingering across SoFlo. 12Z MFL sounding was showing PWATS of 2.16 inches. And in a similar pattern as yesterday afternoon, models depict the southwesterly flow slightly dominant, which will keep the sea breeze boundary pinned against the coast. This scenario will keep the best chances for storms over the eastern half of Miami-Dade, Broward and Palm Beach counties for this afternoon. Inherited forecast package looks good and only minor adjustments were made to Wx and wind grids for this morning update. && .PREV DISCUSSION... /issued 756 AM EDT Tue Aug 13 2019/ AVIATION... Light and variable winds prevail through around 15-16Z then turning SSW around 10kt at most sites. Sea breeze circulations will return this afternoon with the background SSW flow keeping the Atlantic sea breeze close to the coast, but some periods of winds backing to the SSE are possible at the Atlantic terminals. TEMPOS for periods of MVFR or even IFR due to thunderstorms are in place for those same terminals this afternoon. PREV DISCUSSION... /issued 342 AM EDT Tue Aug 13 2019/ DISCUSSION... Most of the region will remain dry through the early morning hours. The exception to this will be across the local waters as well as the coastal and extreme southern areas where some showers and a few thunderstorms could develop. Lows during the early morning hours will range from the mid 70s across the northwestern interior to the lower 80s across the east coast. A south to southwesterly wind flow will continue across the area during the day on Tuesday. Scattered to numerous showers and thunderstorms will continue to develop as the day progresses. The latest model forecast soundings continue to support a moist environment and there could be enough instability to support a few strong thunderstorms this afternoon especially across interior sections as well as the Lake Okeechobee region. High temperatures on Tuesday will range from around 90 across the east coast to the lower to mid 90s across the interior sections. Heat indices will remain on the high side as well. Some areas could see heat index values over 105 especially across interior sections. As the middle of the week approaches, the wind flow will become more south southeasterly as the ridge of high pressure over the western Atlantic will begin to slowly move towards South Florida as the mid level ridge of high pressure over Texas begins to move back to the west. This will allow for the east coast sea breeze to develop and push further inland then what it has been doing over the past several days. Scattered to numerous showers and thunderstorms will continue to develop along the east and west coast sea breezes during this time frame. The greatest coverage of storms will focus over the lake region and the interior sections where both of the east and west coast sea breezes collide. As the weekend approaches, both of the GFS and the ECMWF continue to show an area of low pressure in the northeastern Gulf of Mexico, however, they are still in disagreement as far as the location and how fast this low will move. The GFS continues to show a faster solution. The ECMWF is slower and farther to the west. The location of this area of low pressure will play a role in how much the ridge of high pressure located over the western Atlantic builds across South Florida. The latest forecast shows a blend between the models with scattered showers and thunderstorms developing along the east and west coast sea breezes. This will continue to be monitored as the week progresses. MARINE... South to southwesterly wind flow will continue across the Atlantic and Gulf coastal waters on Tuesday. These winds will shift to a more south southeasterly direction by the middle of the week as a ridge of high pressure over the western Atlantic starts to slowly build towards the west. Seas will generally remain at 3 feet or less. Winds and waves could be higher in and around any shower or thunderstorm. AVIATION... Light SSW flow for sites after daybreak, with both seabreezes kicking in 15Z-18Z. Flow will tend to keep Atlc seabreeze near coast, but still expect most east terminals to become SSE. Short range models suggest SHRA/TSRA over waters around daybreak potentially affecting most terminals 14Z-17Z before afternoon seabreeze development becomes dominant. VCTS for all sites, timing of direct impacts uncertain and some may see a few rounds. Tempo IFR/LIFR possible with potential for strong winds affecting terminals even away from convection. HYDROLOGY... An abundance of moisture will remain in place across South Florida on Tuesday as the south to southwesterly flow will continue. As showers and thunderstorms develop once again throughout the day, there will be the potential for localized flooding especially across the east coast areas. As of 3:00 AM EDT, the level of Fisheating Creek at Palmdale remains at 6.13 feet. With the expectation of focused rainfall over the headwaters of the creek in Highlands County over the next couple of days, it is possible that there will be a continued increase in the stage of the creek. The creek could approach the flood stage of 7 feet sometime this week. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 92 77 92 77 / 60 40 60 30 Fort Lauderdale 90 78 90 79 / 60 40 50 30 Miami 91 78 92 78 / 60 40 40 30 Naples 89 77 89 77 / 50 40 40 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && UPDATE...17/AR
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 434 AM EDT Tue Aug 13 2019 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 132045- 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 from 20 to 60 NM- Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM excluding the territorial waters of 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- Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM- 434 AM EDT Tue Aug 13 2019 ...Scattered to Numerous Afternoon Thunderstorms... ...Afternoon Heat Indices Around 100 to 108 Degrees... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: Scattered thunderstorms will affect the South Florida waters early this morning, with additional activity developing across land during the late morning hours. The greatest coverage is expected during the afternoon hours, with storms slowly drifting eastward into the evening. Thunderstorms will be capable of producing strong winds, heavy rain, and frequent lightning. Waterspouts: Isolated waterspouts are possible across all South Florida waters. Wind: The strongest thunderstorms today will be capable of producing wind gusts of 45 to 55 mph. Flooding: Slow moving thunderstorms today will be capable of producing heavy rainfall, which could result in localized flooding. The greatest risk for flooding will be across the east coast metro areas, and especially where storms repeatedly move over the same locations. Temperatures: Warm and humid conditions will produce afternoon heat index readings in excess of 100 degrees for all of South Florida. Portions of South Florida, especially inland Southwest Florida and Palm Beach County, will see the highest values reach 105 to 108 degrees for an hour or two. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Scattered to numerous thunderstorms are expected each day through the period across South Florida. The highest coverage of storms is expected to shift more across the interior and Lake region by late week. Frequent lightning, heavy rain capable of producing localized flooding, and gusty winds will continue to be the main hazards. Heat indices may reach around 100 to 108 degrees each afternoon through the period. .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), 78 km away, was scanning. The volume nearest the first event began at 18:27 UTC.
4 flood, 1 flash flood. Local standard time, as filed.
Estimated 3 inches of rainfall resulted in two of the three lanes of Sample Road in both directions between Powerline Road and NW 18th avenue are impassable from earlier heavy rain.
Emergency Managers reported partial road closures with several lanes impassible near Stirling Rd and N 56th ave where heavy rain had fallen.
Reports of flooding along portions of A1A in Fort Lauderdale Beach with water overtopping the sidewalks in some areas.
Heavy rainfall resulted in flooding at SW 132nd Ave, between SW 104th St and SW 120th St. There are some cars stuck in the water.
Flooding was reported along University Drive in Davie near Nova Southeastern University. Low lying drainage areas have been over topped leading to water across the roadway. In addition, water completely covered the baseball field at Nova Southeastern University. Estimated total rainfall in the area from this storm was around 5 inches in less than 3 hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2019Every state in 2019This day in weather historyWarnings in Florida, August 2019
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: 849884, 849885, 849886, 849888, 854705.