A weak cold front in Central Florida is slowly sagging south into the Lake Okeechobee region by the afternoon. Deep moisture with southwesterly flow focused convection over the east coast metro.
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.
A weak cold front in Central Florida is slowly sagging south into the Lake Okeechobee region by the afternoon. Deep moisture with southwesterly flow focused convection over the east coast metro. Diurnal heating and sea breeze development will allow for a convergence area to set up particularly over northern portions of the region. Some of the strongest storms produced hail and damaging winds in Palm 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 May 7, 12:53 PM EST, 2 hours 20 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 153 PM EDT Tue May 7 2019 .AVIATION... Convection has developed near Miami-Dade terminals and will likely continue for a few hours. Expect thunderstorms to develop over/west of Broward sites and also inland of Naples this afternoon, with activity persisting through mid-evening. Thereafter, dry TAFs but can't rule out isolated showers coming inland from Atlantic. Similar pattern for Wednesday morning, before afternoon convection likely focuses well inland of terminals. Onshore flow 10 KT or less today, becomes calm tonight, then E at 5-10 KT Wednesday. && .PREV DISCUSSION... /issued 1215 PM EDT Tue May 7 2019/ MESOSCALE UPDATE... Visible satellite loops and surface observations reveal a variety of foci for potential diurnal convective development during the afternoon hours today: (1) An arc of differential-heating-induced baroclinicity flanks the east-northeastward protruding anvil plume cast downshear of a regenerative multicell convective cluster over the Gulf waters -- arching from central Collier County through central Broward County through northwest Miami-Dade County and northern Mainland Monroe County. Ascent accompanying related baroclinic circulations will have the potential to support initial convective development through 2 PM in the vicinity of the arc identified above. (2) A weak sea-breeze boundary is becoming evident along the East Coast vicinity -- especially in areas removed from the cirrus canopy accompanying the aforementioned anvil plume. Boundary-layer cumulus congestus along the sea-breeze boundary is becoming most agitated where diabatic heating from insolation has been strongest, and especially where this boundary intersects the anvil-peripheral baroclinic zone. This includes areas from southeast Broward County to central and eastern Miami-Dade County. The continued westward advance of the sea-breeze boundary, aided by some westward-advective component of the low-level flow south of ridging to the north -- may also encourage initial convective development across interior South Florida through 2 PM -- particularly over western parts of Miami-Dade County. (3) Westward-moving, though decelerating, amalgamated outflow boundaries are presently approaching the East Coast from the Atlantic coastal waters. Related boundary-layer convergence will have the potential to reinforce ascent along the East Coast this afternoon. Whether related ascent is efficient at supporting convective development will depend upon the degree of stabilization preceding the inland spread of the sea breeze and any augmentation from diurnal convective development. With initial storm formation expected through 2 PM owing to the very moist boundary layer containing negligible convective inhibition, and given the modest inland spread of the Atlantic sea breeze, there is some possibility that initial convective development may be in somewhat close proximity to the East Coast Metro Areas -- even if more vigorous development also occurs over the interior. Present indications are that areas from central Mainland Monroe County through central Miami-Dade County and into central Broward County would be the areas of greatest potential for the most vigorous convective development -- on the flank of the cirrus plume and its intersection with sea-breeze boundaries and reinforcing-outflow- related convergence. However, with little mass convergence noted in the low-levels based upon surface observations and mesoanalysis data, the development of convection should occur slowly, and it may not be until as late as 2-4 PM when more vigorous updrafts develop. The Miami observed sounding indicates modest moistening of the lower/middle troposphere during the past 24 hours, with one-quarter inch increase in the precipitable water value and a 0.2-g/kg increase in the lowest-100-mb mean mixing ratio value. The boundary- layer moistening has been offset by a slight decrease in maximum lapse rates aloft by about 0.3 C/km, yielding similar magnitudes of boundary-layer-based buoyancy. As a result, buoyancy profiles aloft appear slightly narrower in some portions of the midlevels, which may temper convective-scale upward accelerations. Moreover, with effective bulk shear values having decreased from around 30 kt to 20 kt during the past 24 hours, updraft/downdraft separation could be somewhat suppressed and mitigate overall convective organization. However, upper-tropospheric flow has strengthened from around 40 kt to 55 kt ahead of a minor low- latitude perturbation approaching the area per water-vapor loops. This will enhance the degree of convective ventilation and potential for convective sustenance, and even weak rotation in the upper reaches of the convective updraft. This should facilitate the sustenance of deeper updrafts, which will have a tendency of developing southeastward owing to cross-deep-shear flanking dynamic perturbation pressure gradient forces. Related dynamic lifting will further be supported by the weak low-level easterly flow established beneath the boosted high-level west- southwesterly flow. Given a convective mode characterized by sustained single cells exhibiting transient mid/high-level weak rotation amid weak midlevel lapse rates -- the hail potential will be non-zero though any hail should be small in size. The lack of stronger effective bulk shear, and related low confidence in upscale growth, along with limited midlevel lapse rates, should temper the convective-wind risk. However, an outside chance for water-loading-enhanced microbursts capable of very isolated damaging winds cannot be ruled out where individual cold pools merge amid the steepest low-level lapse rates -- south of the aforementioned cirrus plume. Otherwise, the higher PW and slow storm motions will enhance the heavy- rain/localized flooding potential, especially where convective training occurs. Given only modest components of anticipated cell motion parallel to initiating boundaries, flooding potential could be mitigated, though non-zero where outflow-induced augmentations to low-level convergence fields favor more boundary-parallel storm motions. This potential would maximize in the 4-7 PM time frame, once established convection has already fostered the establishment of cold pools. PREV DISCUSSION... /issued 952 AM EDT Tue May 7 2019/ UPDATE... With a quite similar air-mass to previous few days, expect another round of showers and thunderstorms to develop near/inland of sea- breeze boundary shortly after midday. Overall wind flow is lighter than few days and less southwesterly in nature, so activity may remain more focused over interior areas than previous few days, and also may develop along Gulf breeze. Still, at least some scattered activity is expected across east coast urban areas, particularly in western suburbs. Moderate instability and fairly cool temperatures aloft will support some strong downburst wind gusts, with some small hail possible. Locally heavy rain may induce some urban flood problems as well. Overall, the forecast has changed little. PREV DISCUSSION... /issued 153 AM EDT Tue May 7 2019/ DISCUSSION... A weak cold front located over Central Florida early this morning will continue to move slowly southward into the Lake Okeechobee region today before stalling and washing out tonight. This will allow for the west and east coast sea breezes to develop and push inland. The best coverage today should be a little bit further inland over the eastern interior areas, but the east coast metro areas will still see scattered coverage . The left over activity should then push back to the east coast metro areas this evening before dissipating, due to the mid to upper level flow is still from the westerly direction. High pressure over the Southeastern United States will then build a little bit further southward into the Florida Peninsula for the middle to end of this week. This in turn will allow for more of a easterly wind flow over South Florida focusing the best coverage each day over the interior and west coast metro areas. However, the east coast metro areas will still see some showers and a few thunderstorms during the late night and morning hours. EXTENDED FORECAST... The high will break down this weekend over the Southeastern United States, as another cold front will be approaching the Southeastern United States. This will allow for the wind flow to swing more to a southerly direction and focus the shower and thunderstorm activity more over the interior areas. The front will continue to move slowly southward early next week down the Florida Peninsula allowing the for the steering flow to become more southwest over the region. This will once again focus the shower and thunderstorm activity over the east coast metro areas early next week. MARINE... The winds will the easterly today through end of the week, as the wind speeds will be at less than 10 knots today increasing to 10 to 15 knots for middle to end of the week. This will keep the seas below 6 feet in both the Atlantic and Gulf waters through the week. Therefore, boating conditions looks good over South Florida waters through the week outside of any showers or thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 73 84 72 84 / 20 20 20 30 Fort Lauderdale 75 83 74 84 / 20 20 20 30 Miami 74 84 74 84 / 20 20 20 40 Naples 71 88 71 88 / 10 60 30 50 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && UPDATE...90/Cohen DISCUSSION...54/BNB MARINE...54/BNB AVIATION...23/SBK
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 259 PM EDT Tue May 7 2019 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 080700- 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- 259 PM EDT Tue May 7 2019 ...Strong storms possible this afternoon and evening... This hazardous weather outlook is for South Florida. .DAY ONE...THIS AFTERNOON AND TONIGHT Thunderstorms: Scattered storms are are expected this afternoon and evening. The stronger storms may produce gusty wind, frequent lightning, and small hail. Wind: Isolated wind gusts to around 60 mph are possible. Hail: Hail up to the size of nickels is possible with the stronger storms. Flooding: There is a reasonable threat of flooding including substantial ponding and drainage problems, especially in the east coast metro locations that have seen heavy rainfall over the past few days. Travel disruptions due to numerous lane closures and a few impassable roads are likely in vulnerable areas and possible on major arteries. Waterspouts: There is a slight chance of waterspouts across the Atlantic and Lake Okeechobee waters. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Scattered showers and thunderstorms are possible across South Florida each afternoon during the week. The primary hazards will be lightning, gusty wind, and ponding of water on roadways and in poor drainage areas. The risk of rip currents across the east coast beaches will be increasing towards the end of the week and into the upcoming weekend. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however individual spotters are encouraged to report high wind, hail, 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.
Special Weather Statement
National Weather Service Miami FL
244 PM EDT Tue May 7 2019
FLZ063-071930-
Glades FL-
244 PM EDT Tue May 7 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GLADES COUNTY UNTIL
330 PM EDT...
* At 243 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Brighton Seminole Reservation,
or 8 miles west of Buckhead Ridge, moving southeast at 35 mph.
* Small hail and wind gusts up to 50 mph possible with this storm.
* Locations impacted include...
Buckhead Ridge and Indian Prairie Canal Mouth.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.
&&
LAT...LON 2720 8094 2719 8091 2718 8091 2717 8090
2717 8088 2714 8087 2720 8083 2719 8081
2718 8080 2714 8080 2700 8092 2714 8112
2721 8105 2721 8094
TIME...MOT...LOC 1843Z 302DEG 32KT 2714 8102
Cohen/HVNSpecial Weather Statement
National Weather Service Miami FL
247 PM EDT Tue May 7 2019
FLZ067-071930-
Inland Palm Beach County FL-
247 PM EDT Tue May 7 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PALM BEACH COUNTY
UNTIL 330 PM EDT...
* At 247 PM EDT, National Weather Service meteorologists were
tracking strong thunderstorms along a line extending from near
Indiantown to 12 miles northeast of Canal Point. These storms were
nearly stationary.
* Small hail and wind gusts up to 50 mph possible with these storms.
* Locations impacted include...
The Acreage.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.
&&
LAT...LON 2679 8028 2679 8059 2699 8062 2696 8061
2696 8029
TIME...MOT...LOC 1847Z 349DEG 2KT 2710 8048 2695 8046
HVN/CohenSpecial Weather Statement National Weather Service Miami FL 304 PM EDT Tue May 7 2019 FLZ069-070-075-071945- Coastal Collier County FL-Inland Collier County FL- Mainland Monroe FL- 304 PM EDT Tue May 7 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL COLLIER COUNTY UNTIL 345 PM EDT... * At 304 PM EDT, National Weather Service meteorologists were tracking strong thunderstorms along a line extending from 7 miles east of Royal Palm Hammock to Carnestown. Movement was southeast at 10 mph. * Winds in excess of 45 mph possible with these storms. * Locations impacted include... Chokoloskee, Everglades City, Plantation Island, Carnestown, Copeland, Royal Palm Hammock, Big Cypress National Preserve, South Blocks Golde, Fakahatchee Strand State Preserve, Picayune Strand State Forest, Port Of The Island, Jerome and Deep Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Miami on Facebook and Twitter. && LAT...LON 2619 8150 2604 8110 2574 8126 2598 8161 TIME...MOT...LOC 1904Z 296DEG 8KT 2602 8148 2590 8136 HVN
Special Weather Statement National Weather Service Miami FL 336 PM EDT Tue May 7 2019 FLZ070-073-075-072015- Inland Collier County FL-Mainland Monroe FL-Inland Miami- Dade County FL- 336 PM EDT Tue May 7 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COLLIER AND NORTHERN MAINLAND MONROE COUNTIES UNTIL 415 PM EDT... * At 335 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm 8 miles east of Chokoloskee, moving southeast at 15 mph. * Winds in excess of 45 mph possible with this storm. * Locations impacted include... Wilderness Waterway, Loop Road Ee Center, Dade-Collier Training Airport and Big Cypress National Preserve. LAT...LON 2575 8126 2601 8112 2585 8087 2559 8112 TIME...MOT...LOC 1935Z 310DEG 13KT 2583 8120 HVN
Special Weather Statement
National Weather Service Miami FL
347 PM EDT Tue May 7 2019
FLZ063-072030-
Glades FL-
347 PM EDT Tue May 7 2019
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GLADES COUNTY UNTIL 430
PM EDT...
* At 347 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm over Lakeport, moving southeast at
10 mph.
* Small hail and winds in excess of 45 mph possible with this storm.
* Locations impacted include...
Moore Haven, Lakeport, Palmdale, Brighton Seminole Reservation and
Indian Prairie Canal Mouth.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.
&&
LAT...LON 2706 8089 2697 8093 2695 8100 2689 8100
2689 8098 2679 8103 2691 8138 2703 8131
2703 8127 2712 8127 2712 8117 2713 8117
TIME...MOT...LOC 1947Z 293DEG 10KT 2701 8114
HVNSpecial Weather Statement National Weather Service Miami FL 413 PM EDT Tue May 7 2019 FLZ070-073-075-072100- Inland Collier County FL-Mainland Monroe FL-Inland Miami- Dade County FL- 413 PM EDT Tue May 7 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MAINLAND MONROE AND CENTRAL MIAMI-DADE COUNTIES UNTIL 500 PM EDT... * At 412 PM EDT, National Weather Service meteorologists were tracking strong thunderstorms along a line extending from 8 miles west of Loop Road Ee Center to near Wilderness Waterway. Movement was southeast at 15 mph. * Wind gusts up to 50 mph possible with these storms. * Locations impacted include... Wilderness Waterway. PRECAUTIONARY/PREPAREDNESS ACTIONS... To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Miami on Facebook and Twitter. && LAT...LON 2554 8078 2537 8116 2573 8131 2584 8109 TIME...MOT...LOC 2012Z 328DEG 15KT 2573 8111 2570 8120 HVN
The Miami radar (KAMX), 123 km away, was scanning. The volume nearest the first event began at 20:10 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Several members of broadcast media reported multiple large pine tree limbs down in the Palisades Community Park.
Broadcast media shared photos and reports of 1 inch hail at a Target in Royal Palm Beach. Several other reports of smaller hail in the area.
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, May 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: 827358, 827357.