An upper level disturbance with colder air aloft allowed for strong scattered showers and thunderstorms across the region. With weak low-level wind flow this allowed for storms over the Atlantic to produce a waterspout.
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.
An upper level disturbance with colder air aloft allowed for strong scattered showers and thunderstorms across the region. With weak low-level wind flow this allowed for storms over the Atlantic to produce a waterspout. One of these waterspouts moved ashore becoming a tornado near Juno Beach.
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 Jul 5, 8:04 AM EST, 1 hour 55 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 904 AM EDT Thu Jul 5 2018 .UPDATE... With this morning sounding coming in more unstable than predicted, have adjusted PoPs and chances of thunderstorms for the interior and Lake region. Modifying this mornings shows CAPE over 5000 J/kg and NCAPE of nearly .4. This would indicate strong storms with good vertical velocity. This could support moderate to even large hail, especially in the interior and Lake regions. The sounding would also support some downbursts to around 60 mph in the same locations, although cant rule out isolated instances closer to the coast lines as well. There are still the concerns mentioned in the previous update as well. && .PREV DISCUSSION... /issued 755 AM EDT Thu Jul 5 2018/ AVIATION... Forecast calls for a return to a more typical diurnal thunderstorms pattern today. Look for storms to initiate mid to late morning along the coast, then development should switch to the interior. Storm motion should be to the north, which may allow development continually along the sea breezes, keeping the possibility they may be close enough to still impact the TAF sites on both coasts through the afternoon. Convective activity should begin to wind down after sunset. UPDATE... With the Tutt low moving off to the west, activity today should not be as active, but it still probable across the area. 500mb temps still look to be between -8.5C and -9C this afternoon with PWATS around 2 inches. The storm motion should be to the north at around 10 miles per hour. However, with the southerly steering flow, and the sea breezes, there could be some training today, so urban street flooding can not be ruled out. Small hail and gusty wind may also be possible with any of the storms today. The main changes to this morning forecast is just to adjust PoPs slightly according to the latest Hi-res models, Which seemed to be somewhat more concentrated in the interior, and Lake region this afternoon and early evening. PREV DISCUSSION... /issued 338 AM EDT Thu Jul 5 2018/ .Another hot, stormy day for South Florida... DISCUSSION... The unsettled pattern continues today as the mid to upper level disturbance lingers around the region. Colder air remains aloft, facilitating the environment for convection today into the weekend. Plenty of moisture will allow for convection to produce typical summer rainfall rates over the coming days. While the air aloft is not as cold as it was yesterday, it still poses a risk for strong storms capable of producing strong wind gusts, small hail, and frequent to excessive lightning. Boundary collisions will remain the major focal points for convection with the potential for funnel clouds as well. As the weekend progresses, some guidance is showing the potential for a slightly drier air mass to push over the region briefly as a boundary pushes into the southeastern United States from the north. Confidence is still not high enough in this drier air coming to pass, but a reasonable compromise is for rain chances to trend back closer to what is climatologically average for this time of year. One feature to keep an eye on would be any easterly waves that bring additional moisture to the region next week, which could cause higher rain chances to materialize. Temperatures through the period will continue to be hot with plenty of low level humidity to keep the feeling of summer across the region. Those exposed to the outdoors, particularly sensitive groups, should continue to take precautions against heat illness by staying hydrated and taking cooling breaks. As the sea breezes develop daily, some limited relief is possible but then the hazard shifts to cloud-to-ground lightning from thunderstorm activity. MARINE... Easterly to southeasterly flow will remain in place across the Atlantic and Gulf waters through the weekend into early next week. Seas across the local waters will generally remain at 2 feet or less. Scattered to numerous showers and thunderstorms are expected each day. Some of the thunderstorms will be capable of producing strong winds, hail, and frequent lightning. Waterspouts will also be possible with these showers and thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 90 77 90 76 / 40 40 40 30 Fort Lauderdale 90 79 90 78 / 30 30 30 20 Miami 91 79 90 78 / 30 20 30 20 Naples 92 76 91 76 / 40 30 50 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && UPDATE...13 DISCUSSION...02/RAG MARINE...02/RAG AVIATION...13
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 913 AM EDT Thu Jul 5 2018 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 060115- 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- 913 AM EDT Thu Jul 5 2018 ...STRONG THUNDERSTORMS POSSIBLE TODAY, MAINLY INTERIOR AND LAKE REGIONS... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: Thunderstorms are forecast across all South Florida today, with the interior and Lake region having the highest chances for widespread coverage, especially in the afternoon and evening hours. The main hazards with any storms will be lightning and heavy rainfall. The strongest storms will be capable of producing gusty winds and hail. Waterspouts: Isolated waterspouts are possible across all South Florida waters today, especially with any boundary collisions that may occur. Wind: The strongest storms today will be capable of producing wind gusts in excess of 60 mph, particularly in the interior and Lake regions, although can not be ruled out for the coastal areas as well. Hail: The strongest storms today will be capable of producing hail up to the size of quarters, especially in the interior and Lake regions. Flooding: Slow moving and training storms will lead to the threat for flooding of streets and poor drainage areas. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY Scattered to numerous showers and thunderstorms are forecast each afternoon and evening through the upcoming weekend. Lightning will be the main hazard with any storm, however conditions will remain favorable for a few strong to severe storms with strong gusty wind and hail. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however individual spotters are encouraged to report high wind, hail, waterspouts, funnel clouds, 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), 147 km away, was scanning. The volume nearest the first event began at 14:59 UTC.
1 tornado. Local standard time, as filed.
Multiple sources including spotter call and video on social media showed a waterspout that made landfall a few dozen yards south of Juno Beach Pier at 1100AM EDT. The tornado lifted shortly after making landfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2018Every state in 2018This day in weather historyThe tornado archive for Florida, 2018Warnings in Florida, July 2018
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: 766286.