A stationary front was draped from the Carolina's through the northeastern Bahamas, with a zone of deeper moistures situated across South Florida. Prevailing east-southeasterly flow allowed for both the Gulf Atlantic sea breeze to progress inland through peak heating hours.
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 stationary front was draped from the Carolina's through the northeastern Bahamas, with a zone of deeper moistures situated across South Florida. Prevailing east-southeasterly flow allowed for both the Gulf Atlantic sea breeze to progress inland through peak heating hours. Several pockets of cooler, drier air aloft worked in concert with steepening low-level lapses to produce sufficient accent for showers and thunderstorms to develop within the saturated airmass. Collisions between the sea breeze boundaries and additional outflow boundaries resulted in a few stronger storms that produced a funnel cloud and flooding across 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 Jun 10, 8:31 AM EST, 5 hours 13 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 931 AM EDT Wed Jun 10 2020 .Update... Mid to upper ridging prevailed across much of the southern Gulf of Mexico, southwest Caribbean Sea, and western Atlantic waters this morning. Surface ridging was also present over the western Atlantic, with a stationary front extending from the coastal Carolinas southeast through the northeast Bahamas. A zone of deeper moisture and unsettled weather was located along the equatorward side of the front where ascent was maximized. Scattered showers and isolated thunderstorms prevailed in this regime from areas offshore of the eastern Florida Peninsula, through the Florida Straits, and into the Bahamas. This synoptic pattern will maintain the prevailing east-southeast low-level flow allowing moisture to increase across the area today. In fact, the 10.12z MFL sounding already revealed some moistening with a precipitable water value of 1.83 inches, which is an increase from last evening's 1.68. Model forecast soundings suggest that this value should climb to 2 inches or greater by this afternoon. As today progresses a series of weak perturbations should drop south southwest via the mean mid-level flow with some cooling aloft. Given 500 mb temperatures of -8 to -10 degrees Celsius mid-level lapse rates steepen to around minus 7 degrees C/km over western portions of our area by mid afternoon. Low-level forcing for ascent will be present as the synoptic flow remains weak enough for Gulf Breeze development today. A collision between this breeze and the inland advancing Atlantic breeze this afternoon should produce plentiful forcing for ascent with convective initiation taking place by the late morning/early afternoon hours over, or just inland from, the east coast metro areas. The mid-upper cloud deck is currently dissipating and allowing for plentiful insolation as temperatures warm into the mid 80s F. Surface based instability is noted via the morning sounding with with 1881 J/kg of surface based CAPE. Modifying the sounding for afternoon heating/mixing suggests this value should increase to around 2500 J/kg or greater. So given the available moisture, instability, and forcing expect scattered to numerous thunderstorms this afternoon with the greatest coverage located over the interior and Gulf Coast regions. The steeper lapse rates should allow for at least transient taller updraft cores to develop in multicell clusters with a few stronger storms possible. The primary thunderstorm hazards today should include frequent lightning, strong (to perhaps locally damaging) wind gusts, small hail, and heavy rainfall (owing to slow storm motions). This is consistent with guidance from the SPC Statistical Severe Convective Risk Assessment Model (SSCRAM) which shows conditional probabilities for wind and hail across the western portion of our area. While highly uncertain, a low end tornado potential may also exist with any boundary collisions later today. Based on trends raised high temperatures just a little across the board and adjusted PoPs through this afternoon. Otherwise the going forecast is in good shape. && .Prev Discussion... /issued 730 AM EDT Wed Jun 10 2020/ Aviation... VFR this morning with generally quiet conditions. Convection develops by early afternoon with the best chances residing inland. Maintained VCTS for all terminals this afternoon, as thunderstorm impacts--including limited ceilings and visibility--are possible. Gusty winds are also possible in and near any storms. Quiet conditions return tonight with shower chances increasing by Thursday morning at the eastern terminals. Prev Discussion... /issued 330 AM EDT Wed Jun 10 2020/ Short Term (Today through Thursday)... Mid-upper level ridging will continue across the Sunshine State through today as a deepening trough across the Midwest digs southward and progresses eastward across the CONUS. At the surface, high pressure continues to stretch from the western Atlantic waters and over South Florida, backing winds from the east. This will again usher in copious amounts of available moisture with precipitable water values exceeding 2.0 inches by the late morning/early afternoon hours, which is ~2 standard deviations above normal and in the 90th percentile. Looking at the 10/00Z soundings for TBW, MFL, and KEY, PW's a moisture gradient can be seen with 2.00 inches at TBW, 1.55 inches at MFL, and 1.68 inches at KEY. The addition of the easterly wind will allow for the east coast sea breeze to push inland across South Florida. Similarly, the Gulf breeze is anticipated to develop and push inland where a collision of boundaries can be expected in the afternoon hours. Therefore, scattered to numerous showers with isolated to scattered thunderstorms can be expected in the interior/west coast sections this afternoon with a slight chance for showers and thunderstorms for the east coast. Tonight, a low-mid level trough rotating along the southwestern periphery of the aforementioned Atlantic high looks to approach South Florida. This shortwave will help increase PoPs over the eastern areas this evening into the overnight hours, leading to scattered showers and even a possible thunderstorm across portions of the east coast and the far southern tip of the peninsula. By Thursday, the aforementioned trough continues to hone in on South Florida, allowing for a further increase in deep moisture across the region and keeping the 2.0 plus PW's around. Global models are again suggesting that a backdoor cold front approaches the State over the course of the day Thursday, but confidence is not too high at this time as models previously had the front washing out and now bring it back into the forecast...more on that in the long term... Despite that, there are a few other ingredients factoring into the uptick in PoPs for Wednesday and Thursday... 1. A series of weak vorticity maxima pass through South Florida, inducing an uptick in convection, especially within the PVA side of the aforementioned shortwave 2. Destabilizing lapse rates, with forecast rates at -6.5 to -7 C/km expected to further increase as solar insolation ensues 3. 500 mb temperatures Wednesday afternoon cool down to around -7.5 to -8 degrees C, though slightly warmer on Thursday afternoon at around -6.5 to -7 degrees C 4. Decent shear between the low, mid, and upper-levels, with an E component near the surface, a NE mid-level component along the east coast and adjacent waters, a NW mid-level component along the west coast, and a NE component in the upper-levels. This is also reflected in the forecast SRH values of 40 to 50 m2/s2 and increasing 0-3km bulk shear of 20 to 30 kts. The combination of the above amid deep rich moisture could allow for the development of numerous rain showers and thunderstorms across South Florida throughout the short term period. Depending on the evolution of these synoptic and mesoscale features, many convective hazards will be possible, including locally heavy rainfall and urban street flooding, locally strong convective wind gusts, frequent lightning, and funnel clouds. With relatively deep easterly to southeasterly flow anticipated across South Florida, storms should generally spread westward. Temperatures will rise to the upper 80s to lower 90s at the coast to mid 90s inland. Combining with high moisture and steady dewpoints in the low-mid 70s, heat indices will climb again near to above 100F. Portions across the west coast may see sizzling heat indices closing in on 107 to 108 degrees. If outside the next several days, plenty of water is recommended. Long Term (Thursday Night through Tuesday)... Both the ECMWF and the GFS show a peculiar pattern for the end of the week. A 500mb low near the Hudson Bay, and an associated surface low pressure system, have a cold front running down the eastern seaboard at 00z Friday. They also have a boundary, which is representative of a backdoor cold front, moving across the Florida peninsula form the east. What is odd about this front, is that it is not really associated with any low pressure system, but is a boundary progressing eastward, around the Bermuda high. It is clearly seen in the 1000-500mb thickness field, with the thickness dropping through the day on Friday, indicating the advection of a slightly cooler air mass into the area. Looking at the 1000-500mb layer RH, the air mass is drier as well. What it looks as though is happening is a stalled boundary, currently east of the Bahamas, and associated with a low in the Great Lakes region, becomes disconnected from the parent low, and then gets pushed eastward by a strengthening bermuda high. The front should help to reduce PoPs Thursday night through Friday morning. The front then merges with another cold front, which is stalled over the Florida Panhandle. By Friday afternoon, additional waves of moisture should be advected into the area by the circulation around the Bermuda high. With the 500mb pattern showing a neutral phase over the area, with a trough to the north, which will dig south through the weekend, and a high to the west, and a weak high to the east, it should be favorable for diurnal convective activity for Saturday and Sunday. With plenty of moisture (PWATs forecast to be around 2 inches), heavy rain has a high potential of occurrence. Another concern is the wind flow. The GFS is showing the 850mb wind to be easterly at only around 10 kts, and the 700mb wind more southeasterly at around 5 kts or lighter. This may lead to slow storm motion, increasing the chances for flooding, if the convection occurs over the metro areas, which do have likely PoPs, so it is definitely looking to be more of a concern at this time. There are still several days before the weekend for the models to adjust, but confidence is growing for the chances of rain. By the end of the weekend, the 500mb trough becomes a cutoff low, sitting over the Mid-Atlantic states. The cutoff slowly drops south, helping to increase instability for the beginning of the week as well. this will keep the PoPs high over the area for the first part of the week, and also the concern for flooding, especially if the ground has already become saturated from rain over the weekend. Marine... East winds will continue through the remainder of the week across the Atlantic and Gulf waters as steady high pressure prevails across the western Atlantic. The Atlantic seas will generally be 2 feet or less for most of the week, except for Thursday into Friday where they could get up to around 4 feet. The Gulf seas will remain at 2 feet or less through the week. Scattered showers and thunderstorms will be possible each day. Winds and waves will be locally higher in and around showers and thunderstorms. Aviation... VFR conditions expected this morning with generally E winds, except for APF where winds take a W component due to a Gulf Breeze. Convection will be possibly by late morning with the best chances residing inland. Therefore, added VCTS too all TAFs. May need to add TEMPO groups for convection once confidence on timing and coverage grows. Otherwise, expect MVFR CIGs/VIS during SHRA/TS and potentially IFR conditions during heavier convection. Gusty winds near convection. Beach Forecast... The threat of rip currents will remain low for all beaches today. By Thursday, the rip current risk may elevate along the Atlantic beaches due to strengthening easterly winds. && .Preliminary Point Temps/PoPs... West Palm Beach 90 77 86 74 / 40 30 40 10 Fort Lauderdale 89 78 85 76 / 30 40 40 10 Miami 90 77 87 76 / 40 40 50 10 Naples 90 75 90 72 / 60 40 70 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && Marine...03/Fell Aviation/Update...34/SPM Beach Forecast...03/Fell Short Term...03/Fell Long Term...13
Hazardous Weather Outlook for South Florida National Weather Service Miami FL 951 AM EDT Wed Jun 10 2020 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 110200- 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- 951 AM EDT Wed Jun 10 2020 ...A Few Strong Storms Producing Heavy Rain Inland and Gulf Coast... ...Heat Index Values Above 105 Southwest Florida... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Thunderstorms: Scattered to numerous storms are likely this afternoon especially for inland areas and along the Gulf Coast. Wind: strong to locally damaging wind gusts are possible with the strongest storms. Hail: small hail is possible with the stronger storms. Tornadoes: there is a small possibility for a tornado for western inland areas and along the Gulf Coast today. Heat: Heat index values above 105 degrees are expected across portions of the Gulf and interior early this afternoon. Waterspouts: Waterspouts are possible across the Lake Okeechobee waters this afternoon through this evening before transitioning to all local waters overnight with the showers and thunderstorms that develop. Flooding: Some of the thunderstorms may produce torrential rainfall, which could lead to some localized flooding in urban and poor drainage areas. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Isolated to scattered thunderstorms will be possible across South Florida through the remainder of the period, mainly during the afternoon hours each day. Gusty winds and heavy rainfall may accompany the stronger thunderstorms. This weekend through early next week may see scattered to numerous showers and storms with heavy rainfall and an increased threat for flooding. Mid-late week, strengthening easterly wind flow will increase the rip current risk along the Atlantic beaches. Heat index values will likely exceed 105 degrees across portions of the Gulf coast and interior sections of south Florida on Thursday. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however individual spotters are encouraged to report high wind, hail and flooding to the National Weather Service forecast office in Miami. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. For more information...visit the National Weather Service in Miami website at www.weather.gov/miami.
Special Weather Statement National Weather Service Miami FL 1128 AM EDT Wed Jun 10 2020 FLZ068-168-172-101615- Coastal Broward County FL-Coastal Palm Beach County FL- Metro Palm Beach County FL- 1128 AM EDT Wed Jun 10 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PALM BEACH COUNTY UNTIL 1215 PM EDT... * At 1127 AM EDT, National Weather Service meteorologists were tracking a gusty showers over Boca Raton abd east of Delray Beach. These showers are moving slowly southwest around 5 mph. * Funnel clouds possible with these showers. * Locations impacted include... Pompano Beach, Boca Raton, Deerfield Beach, Boynton Beach, Delray Beach, Lighthouse Point, Highland Beach, Hillsboro Beach and Gulf Stream. PRECAUTIONARY/PREPAREDNESS ACTIONS... Although typically weak and short lived, a landfalling waterspout can cause property damage and serious injury. 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 2653 8000 2632 7993 2624 8010 2649 8009 TIME...MOT...LOC 1527Z 053DEG 4KT 2635 8006 SPM
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1132 AM EDT WED JUN 10 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1125 AM WATER SPOUT 4 ENE DEERFIELD BEACH 26.33N 80.05W
06/10/2020 AMZ650 FL PUBLIC
MULTIPLE REPORTS OF WATERSPOUTS ASSOCIATED
WITH A SHOWER OFFSHORE BOCA RATON/ DEERFIELD
BEACH.
&&
KELLYSpecial Weather Statement National Weather Service Miami FL 1212 PM EDT Wed Jun 10 2020 FLZ168-101630- Coastal Palm Beach County FL- 1212 PM EDT Wed Jun 10 2020 ...SIGNIFICANT WEATHER ADVISORY FOR UNTIL 1230 PM EDT... * At 1211 PM EDT, National Weather Service meteorologists were tracking a gusty shower over Highland Beach. This shower was nearly stationary. * Funnel clouds possible with this shower. * Locations impacted include... Boca Raton, Boynton Beach, Delray Beach, Highland Beach, Ocean Ridge, Gulf Stream and Briny Breezes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Although typically weak and short lived, a landfalling waterspout can cause property damage and serious injury. 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 2654 8007 2644 7992 2631 7996 2633 8009 TIME...MOT...LOC 1611Z 024DEG 3KT 2642 8005 SPM
Special Weather Statement
National Weather Service Miami FL
201 PM EDT Wed Jun 10 2020
FLZ067-071-101845-
Inland Broward County FL-Inland Palm Beach County FL-
201 PM EDT Wed Jun 10 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BROWARD AND SOUTHWESTERN
PALM BEACH COUNTIES UNTIL 245 PM EDT...
* At 201 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Holey Land Wildlife Refuge, or
20 miles south of South Bay, moving southwest at 10 mph.
* Small hail and winds in excess of 45 mph possible with this storm.
* Locations impacted include...
Holey Land Wildlife Refuge, Rotenberger Wildlife Refuge and
Miccosukee Indian Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.
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 2622 8069 2617 8088 2639 8088 2646 8062
2631 8055
TIME...MOT...LOC 1801Z 059DEG 7KT 2636 8067
CohenSpecial Weather Statement National Weather Service Miami FL 211 PM EDT Wed Jun 10 2020 FLZ067-101845- Inland Palm Beach County FL- 211 PM EDT Wed Jun 10 2020 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PALM BEACH COUNTY UNTIL 245 PM EDT... * At 211 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over South Bay, moving west at 5 mph. * Small hail, funnel clouds, and winds in excess of 45 mph possible with this storm. * Locations impacted include... Belle Glade, South Bay, Lake Harbor, Okeelanta, Holey Land Wildlife Refuge and Rotenberger Wildlife Refuge. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. 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 2644 8061 2637 8088 2669 8089 2671 8072 TIME...MOT...LOC 1811Z 068DEG 6KT 2665 8075 Cohen
Special Weather Statement
National Weather Service Miami FL
243 PM EDT Wed Jun 10 2020
FLZ066-067-070-071-101930-
Inland Broward County FL-Hendry FL-Inland Collier County FL-
Inland Palm Beach County FL-
243 PM EDT Wed Jun 10 2020
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL COLLIER...
SOUTHEASTERN HENDRY...NORTHERN BROWARD AND SOUTHWESTERN PALM BEACH
COUNTIES UNTIL 330 PM EDT...
* At 242 PM EDT, National Weather Service meteorologists were
tracking a cluster of strong thunderstorms developing across the
advisory area. Movement of individual storms was southwest at 5 mph.
* Winds in excess of 45 mph and funnel clouds possible with these
storms.
* Locations impacted include...
Belle Glade, South Bay, Lake Harbor, Okeelanta, Holey Land Wildlife
Refuge, Big Cypress Seminole Reservation, Rotenberger Wildlife
Refuge, Miccosukee Indian Reservation, Belle Glade Camp, Miccosukee
Service Plaza and Big Cypress National Preserve.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
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 2665 8097 2636 8105 2612 8098 2616 8073
2641 8051 2674 8061
TIME...MOT...LOC 1842Z 048DEG 6KT 2666 8071 2654 8085 2629 8082
CohenThe Miami radar (KAMX), 123 km away, was scanning. The volume nearest the first event began at 18:45 UTC.
1 funnel cloud, 1 flood. Local standard time, as filed.
Spotter reported a funnel cloud extending 80 percent of the way to the ground from cloud base in the Belle Glade area. Spotter noted that the funnel did not extend to the ground. This was associated with generating convection that interacted with a lake-breeze boundary peripheral to Lake Okeechobee.
Snap map image of poor-drainage-related flooding of residential property in the Belle Glade area, enhanced by runoff from earlier heavy rains.
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, June 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: 896474, 896475.