A construction worker was injured by thunderstorms developing along the east coast seabreeze during the early afternoon hours.
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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.
A construction worker was injured by thunderstorms developing along the east coast seabreeze during the early afternoon hours.
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 14, 12:32 PM EST, 1 hour 9 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 132 PM EDT Mon Aug 14 2017 .AVIATION... Sea breeze should push inland from terminals by 4PM, cutting off shower and isolated thunderstorm chances. After the sea-breeze arrives, expect onshore winds at 10 knots or less. By sunset this winds should calm again and remain calm or very light through Tuesday morning. Generally dry weather is expected after about 7pm this evening through the end of the period. && .PREV DISCUSSION... /issued 1015 AM EDT Mon Aug 14 2017/ UPDATE... Aside from isolated showers near Marco Island, mainland areas have had quiet morning thus far, and should generally remain so until early afternoon. Atmosphere is only slightly more moist and unstable than Sunday, so expect convective coverage to not increase significantly this afternoon. Supported also by CAMs, have reduced shower/thunderstorm chances by 10-20% most areas. Activity should develop midday/early afternoon over or just west of most inland suburbs of both coasts metropolitan areas, then increase in coverage as they move further into interior South Florida. There is a very slight risk of strong downburst winds in any convection over the interior that becomes robust, but for now risk is so low that it is not mentioned in HWO. Additionally, cant rule out a waterspout especially Gulf waters this morning, then Lake Okeechobee later this afternoon. Raised maxima a degree or two across coastal areas based on current obs, otherwise no changes to previous forecast this morning. PREV DISCUSSION... /issued 331 AM EDT Mon Aug 14 2017/ DISCUSSION... Same synoptic pattern across South Florida featuring surface high pressure stretching over from the Atlantic, a mid-level trough meandering over the eastern seaboard and southern tier of the United States, and Tropical Storm Gert well to the northeast of the Bahamas. Yesterday's slightly drier airmass has moved on but we haven't quite moistened up to increase rain chances too dramatically today. Diurnal sea breeze circulations remind us that summer showers and thunderstorms will be the main show over the interior today along with the summer heat that builds through the day. Temperatures will reach into the mid 90s across much of the interior with some of the high temperatures pushing into the inland suburbs of both coastal metropolitan areas. The apparent temperatures could rise into the mid 100s with heat index values of 106+ possible over portions of the area. We will flirt with daily temperature records in some places, but we should remain just below them. Not much changes in the pattern for Tuesday and Wednesday, with returning moisture increasing shower and thunderstorm chances slightly. On Thursday, some tropical moisture will approach the region from the Greater Antilles. Ahead of this wave, some subsidence could act to lower rain chances late Wednesday into Thursday morning before the bulk of the moisture arrives during the day on Thursday. The 00z GFS captures this a bit better than ECMWF, which is keeping moisture in the region more closely related to the frontal boundary/trough advancing closer. A larger wave of tropical moisture will push in from the Greater Antilles during the weekend. Ahead of the wave, some drier air may potentially hinder convection on Friday night into Saturday. As the wave pushes in on Sunday to wrap up the extended period, this is a good time to remember that we are about to enter the statistical peak of the Atlantic hurricane season. The National Hurricane Center continues to monitor a tropical wave to the south/southwest of the Cabo Verde Islands and has assigned it a medium 5-day formation chance of 50 percent. While no immediate tropical threats are presenting themselves to South Florida over the next 7 days, this is a good time to check preparations and plans for your household, your business, and your community in the event a tropical threat were to emerge later in the season. Ready.gov and FloridaDisaster.org offer valuable resources to help you make plans! MARINE... Mostly light to moderate breezes and slight seas the next 5 days. Sea breezes will prompt onshore flow near the coast during the day shifting to an offshore land breeze at night. As usual, locally gusty winds and higher seas are possible near thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 94 78 93 78 / 10 10 30 10 Fort Lauderdale 93 80 92 80 / 20 10 30 10 Miami 94 80 93 80 / 20 10 40 10 Naples 93 79 93 77 / 20 10 30 20 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && UPDATE...23/SK DISCUSSION...02/RAG MARINE...02/RAG AVIATION...23/SK
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 336 AM EDT Mon Aug 14 2017 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 150000- 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- 336 AM EDT Mon Aug 14 2017 ...SCATTERED TO NUMEROUS STORMS MAINLY INTERIOR AREAS... ...HEAT INDICES 105 TO 107 DEGREES OVER MOST OF SOUTH FLORIDA... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: Isolated to scattered thunderstorms are possible over the metro areas increasing to scattered to numerous thunderstorms over the interior areas of South Florida this afternoon. The primary impacts will be lightning strikes, and locally heavy rainfall. Temperatures: Heat indices will be 105 to 107 degrees across most of South Florida today, except 100 to 105 degrees over the coastal areas of South Florida. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Chances for afternoon thunderstorms, mainly over interior South Florida, will persist through the week. Thunderstorm chance will increase some over the latter half of the week. Lightning is the primary threat with these thunderstorms. Heat index values may exceed 105 degrees across the interior areas of South Florida each day early this week. .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. Baxter
The Miami radar (KAMX), 18 km away, was scanning. The volume nearest the first event began at 18:42 UTC.
1 lightning. Local standard time, as filed.
A 31-year old male was injured by a lightning strike while sitting in a white Dodge Ram truck at 241 PM EDT in southwest Miami-Dade County near the intersection of SW 272nd Street and SW 224th Avenue. The victim was transported to Homestead Hospital in unknown condition.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2017Every state in 2017This day in weather historyWarnings in Florida, August 2017
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: 718491.