With the influence of a mid-level trough to the north, South Florida was provided with a source of lift, which combined with surface instability from diurnal heating to develop scattered showers and thunderstorms on the afternoon of May 19th.
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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.
With the influence of a mid-level trough to the north, South Florida was provided with a source of lift, which combined with surface instability from diurnal heating to develop scattered showers and thunderstorms on the afternoon of May 19th.
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 19, 1:13 PM EST, 2 hours 2 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 213 PM EDT Sun May 19 2024 ...New LONG TERM... .SHORT TERM... (Rest of today through Monday) Issued at 131 PM EDT Sun May 19 2024 Scattered to numerous showers will be likely across portions of southeast Florida this afternoon as a shortwave and associated surface front approach the region. Satellite imagery shows the boundary already draped across the Lake Okeechobee region, with strong to severe storms firing off across Okeechobee and St Lucie counties. As this boundary moves southward, conditions will rapidly deteriorate for areas along the Lake and for southeastern FL. Data from the MFL 12z sounding and ACARS flights depict an atmosphere primed for convective activity and potential severe impacts, with MUCAPE > 3000 J/kg, 700-500mb lapse rates above 6 C/km, EBWD > 40 kts, DCAPE > 1000 J/kg and PWATs of 1.65 inches or more which could result in damaging wind gusts and severe hail (up to the size of a quarter) with some of the stronger thunderstorms. At this time, the limiting factor for hail development are the mid level temperatures which remain above -10C. However, temperatures will continue to drop and lapse rates will steepen as a pronounced shortwave finalizes its approach, thus enhancing the risk for hail across the area. A limited risk of tornadoes will also exist with some of the stronger storms, but chances will be limited to areas where low-level shear exceeds threshold values, namely along the immediate East Coast sea breeze boundaries. A Severe Thunderstorm Watch has been issued for Palm Beach, Broward and Miami-Dade counties through 7PM today. Temperatures will continue to rise across southern-most portions of the region ahead of the approaching front and associated cloud coverage. Peak apparent temperatures in the range of 105-110F are likely for portions of Miami-Dade and Broward counties where Heat Advisories remain in effect through this evening. Localized areas in Palm Beach and Collier counties could also see elevated heat index values early this afternoon, but convective activity and cloud coverage should help limit heat-related impacts across those counties. The frontal boundary will slowly drift southward across our region overnight into Monday. This, along with the once again pinned east coast sea breeze will support scattered to numerous showers and thunderstorms across the region, although reduced instability and gradually decreasing large-scale ascent (as the trough shifts east) should support a lower risk of severe storms than Sunday. Although temperatures and heat indices will remain above normal, they should be a few degrees lower than Sunday so heat headlines are not expected. && .LONG TERM... (Monday night through next Saturday) Issued at 213 PM EDT Sun May 19 2024 Frontal boundary will make it's way into the FL Straits on Tuesday into early Wednesday before dissipating. The upper level trough axis will sit east of the area through mid week before finally starting to lift out and height rises work their way into the area. This will result in elevated PoPs for Tuesday and Tuesday evening before shower/storm chances diminish to low end chance for mid week through next weekend, mainly confined to afternoon and early evening diurnally driven sea-breeze convection. Temperatures will remain above normal through next weekend with highs across the east coast metro in the upper 80s to lower 90s, and low to mid 90s over the interior and SW FL. Low temperatures will be closer to climo through mid week ranging from the upper 60s to mid 70s, before increasing late week into next weekend to the low 70s around the lake and upper 70s near the coasts thanks to the flow becoming more southeasterly. && .AVIATION... (18Z TAFS) Issued at 131 PM EDT Sun May 19 2024 Sub-VFR conditions could be possible for all terminals this afternoon as convection develops over the region. Short- fuse TEMPOs will likely be needed through the afternoon especially for East Coast sites where chances for TSRA are highest. SW winds 8-10 kts will prevail across much of South Florida, but the East Coast sea breeze will attempt to work inland, thus included the wind shift for several of the East Coast sites over the next few hours. Showers will linger overnight with light and variable winds. Similar conditions will be possible tomorrow. && .MARINE... Issued at 131 PM EDT Sun May 19 2024 Generally benign conditions should prevail across local waters through the period. Scattered to numerous showers and thunderstorms will be expected today as a cold front drops through the region, with locally enhanced winds and seas possible in storms particularly over the Atlantic waters. Conditions will improve into the week as the front pushes through. && .PRELIMINARY POINT TEMPS/POPS... Miami 78 92 75 88 / 30 60 40 60 West Kendall 75 94 73 90 / 30 60 30 60 Opa-Locka 77 93 75 90 / 30 60 40 60 Homestead 76 93 75 89 / 40 50 40 60 Fort Lauderdale 78 90 75 87 / 40 60 40 60 N Ft Lauderdale 77 90 75 88 / 40 60 40 60 Pembroke Pines 78 94 75 91 / 30 60 40 60 West Palm Beach 74 90 72 88 / 40 60 40 60 Boca Raton 76 92 73 88 / 40 60 40 60 Naples 78 90 74 90 / 40 40 20 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...Heat Advisory until 6 PM EDT this evening for FLZ071>074-172>174. AM...None. GM...None. && SHORT TERM...ATV LONG TERM....CMF AVIATION...ATV
Hazardous Weather Outlook National Weather Service Miami FL 305 PM EDT Sun May 19 2024 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 201915- 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 County-Metro Palm Beach County- Coastal Collier County-Inland Collier County-Inland Broward County- Metro Broward County-Inland Miami-Dade County- Metropolitan Miami Dade-Mainland Monroe-Coastal Palm Beach County- Coastal Broward County-Coastal Miami Dade County-Far South Miami- Dade County- 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- 305 PM EDT Sun May 19 2024 ...Severe Storms Possible This Evening... ...Hot and Humid Conditions Continue Today... This Hazardous Weather Outlook is for Atlantic coastal waters, southeast Florida, southern Florida, southwest Florida and Gulf of Mexico. .DAY ONE...This afternoon and tonight. Thunderstorms: Scattered to numerous thunderstorms are possible this evening. Some of these storms will be capable of damaging winds, large hail, lightning, and heavy rain. An isolated tornado cannot be ruled out as well. The best chances of severe storms will be over the east coast metro. Heat: Peak heat indices of 105-110 degrees can be expected today over South Florida area, with the highest heat indices expected over the southern half of the area. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Daily thunderstorm chances will remain for much of the upcoming week, with gusty winds, small hail, frequent lightning, and heavy rain possible. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report high wind, hail, and flooding to the National Weather Service forecast office in Miami.
Special Weather Statement
National Weather Service Miami FL
319 PM EDT Sun May 19 2024
FLZ067-068-192000-
Inland Palm Beach County FL-Metro Palm Beach County FL-
319 PM EDT Sun May 19 2024
...A strong thunderstorm will impact portions of northeastern Palm
Beach County through 400 PM EDT...
At 319 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm over Canal Point, moving northeast at 20 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
West Palm Beach, Palm Beach Gardens, Pahokee, Canal Point, North
County Airport, Fremd Village-Padgett Island, The Acreage, and
Caloosa.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.
A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southeastern Florida.
&&
LAT...LON 2681 8018 2679 8064 2683 8066 2689 8062
2696 8061 2696 8029
TIME...MOT...LOC 1919Z 245DEG 16KT 2687 8062
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
JSThe Miami radar (KAMX), 142 km away, was scanning. The volume nearest the first event began at 20:12 UTC.
1 hail. Local standard time, as filed.
An off duty NWS employee reported 1-inch diameter (quarter-sized) hail near Palm Beach Gardens.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2024Every state in 2024This day in weather historyWarnings in Florida, May 2024
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: 1182283.