Sea breeze storms caused a lightning structure fire.
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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 JAX wrote it up.
Sea breeze storms caused a lightning structure fire.
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 Jacksonville, FL wrote its last area forecast discussion before the first event at May 29, 12:26 PM EST, 2 hours 19 minutes earlier.
Area Forecast Discussion National Weather Service Jacksonville FL 126 PM EDT Fri May 29 2020 .AVIATION... [Through 18Z Saturday] Convection breaking out rapidly across NE FL TAF sites this afternoon and will continue the TEMPO groups through 22-23z for potential IFR VSBYS and MVFR CIGS with gusty winds up to 30 knots. Timing for SSI likely to start closer to 19-20z. Storms will linger through 23-00z, then more light shower activity with VFR CIGS will continue through 03-04Z time frame before ending with leftover debris clouds aloft and some slight chance for patchy fog towards morning at all NE FL TAF sites. Diurnal heating may trigger some VCSH at all TAF sites by 15z time frame on Saturday with any deeper convection left until after the current TAF cycle. && .PREV DISCUSSION [904 AM EDT]... .NEAR TERM [Through Tonight]... Upper trough axis remains west of forecast area during this period. Moist, unstable airmass will remain across forecast area. Scattered showers/t-storms will develop along east and west coast sea breezes by midday, with coverage maximized over the eastern half of forecast area late in the day as sea breezes converge. Hourly POP/ weather grids reflect this evolution. Will see potential for small hail and downburst winds from the strongest storms that develop. Locally heavy rainfall also possible due to expected slow storm motion. High temperatures are expected to reach the mid 80s coast, upper 80s/around 90 inland Today. Activity should gradually diminish during the evening. Low temperatures are expected to be in the upper 60s inland, lower 70s coast. .SHORT TERM [Saturday Through Sunday]... A moist and unstable pattern will continue Saturday and Sunday afternoon before a cold front moves through the region Sunday afternoon and evening with locally heavy rain being the main threat. A mid to upper level shortwave over the eastern third of the U.S. will allow moist and unstable mid level SW flow to continue over the region. Inland moving seabreeze circulations from the Atlantic and Gulf coast will help to trigger convection near Highway 301 before the low and mid level southwest flow shifts storms towards the NE FL and SE GA coast by the evening hours. With low and mid level flow fairly weak, there's also the potential for a heavy rainfall with slower moving storms. Widespread amounts in the 1-2 inch range can be expected with locally heavier amounts of up to 2-4 inches possible from Highway 301 eastward to the coast which could lead to local urbanized flooding in the Jacksonville and St Augustine metro areas. High temperatures will be near normal Saturday and Sunday with high temperatures in the upper 80s to near 90 while overnight lows will remain slightly above normal in the low 70s at the coast with near 70 values over inland areas. .LONG TERM [Monday Through Friday]... A cold front will move southeast of the region early Monday with much drier conditions expected under northwest flow aloft as mid level ridge over the upper midwest builds slowly eastward from the midwest states. Surface high pressure will be located north of the region will put a stop to convection as moisture levels drop below normal by late Monday with Precipitable water levels around one inch. As high pressure moves slowly over the area Tuesday into Wednesday, cooler NE winds around 10-15 mph near the beaches and 5-10 mph over inland locations will help temperatures below normal with highs only in the lower 80s at the beach while near average temperatures will be pushed inland near the I-75 corridor with Highs in the mid to upper 80s. Thursday and Friday, surface high pressure will begin to weaken and move east of the region with light onshore easterly winds on thursday veering southeasterly into Friday with a slight chance of showers moving in from the Atlantic on each day as moisture levels being to slowly increase. Temperatures will be below normal Monday through Wednesday with highs in the lower 80s and then warm to above normal values Thursday and Friday with highs in the lower 90s. Low temperature will start out above normal early Monday around 70 degrees, then near normal Tuesday morning into Thursday morning with lows in the mid to upper 60s and then above normal values by the end of the week. .MARINE... Ahead of the approaching cold front expecting a continuation of South winds 10-15 knots and seas 2-5 ft Today, becoming Southwest on Saturday, then shifting winds Sunday/Sunday Night with the cold frontal passage. High pressure develops well N of the area Monday. Northeast winds will develop Sunday Night, with East to Northeast winds 15-20 knots and building seas Monday. Rip Currents: For NE FL beaches...Moderate Risk Today and Saturday. For SE GA beaches...Moderate Risk Today, Low Risk Saturday. && .PRELIMINARY POINT TEMPS/POPS... AMG 69 88 69 87 66 / 50 60 10 20 0 SSI 73 83 72 85 72 / 70 60 30 30 10 JAX 71 89 71 89 71 / 80 70 20 40 10 SGJ 72 87 71 87 71 / 70 60 20 40 20 GNV 70 88 69 90 69 / 40 40 10 50 10 OCF 71 89 70 90 70 / 40 50 10 50 10 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
The Jacksonville radar (KJAX), 39 km away, was scanning. The volume nearest the first event began at 19:47 UTC.
1 lightning. Local standard time, as filed.
Lighting caused a house fire in Mandarin along Grand Lakes Drive South. The time of the damage was based on NLDN data. The cost of damage was unknown but estimated for the inclusion of the event in Storm Data.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2020Every state in 2020This day in weather historyWarnings in Florida, May 2020
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: 883913.