An unsettled weather pattern remained over South Florida with a mid-level trough producing cool temperatures aloft and southwesterly flow keeping sufficient tropical moisture across the region. As sea breeze boundaries developed, the flow favored a dominant Gulf breeze, which helped to develop thunderstorms over the east coast metro areas.
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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.
An unsettled weather pattern remained over South Florida with a mid-level trough producing cool temperatures aloft and southwesterly flow keeping sufficient tropical moisture across the region. As sea breeze boundaries developed, the flow favored a dominant Gulf breeze, which helped to develop thunderstorms over the east coast metro areas. A few storms were strong enough to produce damaging winds.
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 16, 9:21 AM EST, 3 hours 2 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Miami FL 1021 AM EDT Wed Jun 16 2021 ...Some Strong To Even Severe Storms This Afternoon... ...Flood Watch In Effect For Southern Areas Of South Florida Through This Evening... .UPDATE... A disturbance over the Southwestern Gulf of Mexico will remain nearly stationary today, a trough of low pressure extends east northeast across South Florida and into the reminiscence of tropical Bill over the Northern Atlantic waters. This will keep the south to southwest steering flow over South Florida today allowing for the west coast sea breeze to push inland while the east coast sea breeze remains over the east coast metro areas. Therefore, numerous to definite showers and thunderstorms will affect south florida with the highest coverage over the interior and east coast metro areas. There is also a short wave that will be moving across South Florida this afternoon from the Eastern Gulf of Mexico. This will allow for the mid levels of the atmosphere to cool down to around -8.5 to -9C this afternoon over South Florida along with the LI index getting to -9. There will also be some low level turning in the winds over the east coast metro areas this afternoon due to the east coast sea breeze developing and remaining over the east coast metro areas. The latest short range models are showing the 1-3 KM SRH to be around 150 to 200 by late this afternoon due to the east coast sea breeze. Therefore, the strongest storms will be capable of producing hail up to quarter size, gusty winds, frequent lightning strikes, and a possible weak tornado especially over the eastern areas of South Florida. Rest of the forecast looks good a this time and no other changes are planned at this time. && .HYDROLOGY... The PWAT values are also going to be around 2 inches this afternoon over South Florida which is around the 90th percentile range for this time of year. This means that the storms will be capable of producing heavy rainfall again. The grounds are also becoming saturated over the southern areas of South Florida for the heavy rainfall during the last couple of days and with more heavy rainfall on the way this afternoon. Therefore, the Flood Watch will remain in place over the Southern areas of South Florida through this evening. && .PREV DISCUSSION... (Issued 746 AM EDT Wed Jun 16 2021) AVIATION(12Z TAFS)... Showers and thunderstorms are expected today over the TAF sites especially this afternoon. Therefore, VCTS is in the forecast from 15Z until 00Z with even a TEMPO group between 18Z and 22Z for the east coast TAF sites and 16Z until 20Z for KAPF taf site. The vis and ceiling will remain in the VFR conditions but will fall down into MVFR and even could fall into IFR conditions with the storms. The winds will remain south/southwest at 5 to 10 knots today over the TAF sites. PREV DISCUSSION... (Issued 232 AM EDT Wed Jun 16 2021) DISCUSSION... Short Term (Now through Thursday): An active weather pattern continues as today progresses due to a 500 mb trough remaining in place over the eastern seaboard and digging down into the Florida Peninsula. A rather light southwesterly flow will continue across the region today which will help the moisture advection to continue as well. The 00z MFL sounding shows PWAT values coming in at 2.10 inches and these values are forecasted to remain at these levels or slightly higher throughout the day on Wednesday. This will allow for another round of scattered to numerous showers and thunderstorms to develop later this morning as the sea breezes develop once again and push inland. Some storms could become strong once again during the afternoon and they could contain gusty winds, small hail, and heavy rainfall. With the threat for additional heavy rainfall and training thunderstorms once again, the potential for additional flooding will exist especially across the urban and low lying areas of the east and west coast. For this reason, a flood watch will go into effect later this morning and it will last into Wednesday evening for Broward, Miami-Dade, Collier, and Mainland Monroe counties. High temperatures this afternoon will generally remain in the upper 80s across most of South Florida this afternoon. On Thursday, the latest model guidance shows the 500 mb trough starting to slowly move eastward off into the Atlantic waters with the trough axis beginning to lift off to the northeast. At the same time, a mid level ridge of high pressure centered in the eastern Bahamas will begin to move westward towards the region. This will allow for the winds to shift to more of an east to southeasterly direction. The PWAT values are forecasted to begin to drop as the day progresses as some drier air starts to filter into the region. Scattered showers and thunderstorms will still be possible along the sea breezes as they develop and push inland. With the possibility of bringing some slightly drier air into the region, the coverage of showers and thunderstorms will not be as high as it has been over previous days. The greatest chances of showers and thunderstorms will start to shift to the interior and west coast as the east to southeasterly flow moves into the region as Thursday progresses. High temperatures on Thursday will generally remain in the mid to upper 80s across most of South Florida. Long term (Thursday Night through Tuesday): By Thursday night, models show a mid/upper trough weakening and departing from the area, while a sfc ridge and associated high pressure cell expand over the western Atlantic and into the east coast of Florida through Friday morning. This synoptic scenario will veer winds to a more E/SE flow across SoFlo and allow for the airmass to become a little more stable for the beginning of the long term. Another feature expected this weekend will be the potential arrival of a Saharan Air Layer (SAL). This may also contribute to lower POPs for the Fri-Sat timeframe, with highest values down to the 20-30 percent by Friday afternoon and into Saturday. But model PWATs suggest that there should be enough lingering moisture for daytime heating to work with. Thus, a few isolated showers/storms could still develop, mainly in the afternoon hours. Long range models remain in fair agreement regarding a possible area of area of disturbed weather developing over the western Gulf waters, with an associate stream of moisture reaching the Florida peninsula on Sunday and into early next week. And although there is still uncertainty in the models, this is the second day in a row that solutions hint at this scenario. Thus, there is at least enough confidence to begin ramping up POPs into the 40 percent range starting Sunday. Interests in the upcoming weekend forecast should continue to monitor the updates to the official forecast. MARINE... A light south to southwesterly flow will continue across the Atlantic and Gulf coastal waters today. Scattered to numerous showers and thunderstorms will develop over the local waters once again. Some of the thunderstorms could become strong this afternoon and this evening possibly containing waterspouts, gusty winds, and frequent lightning. As the end of the week approaches, winds will gradually shift around to the east southeast across the local waters as an area of high pressure builds back into the region. AVIATION (06Z TAFS)... Mainly VFR conditions will prevail throughout the overnight hours. Light and variable winds overnight will increase out of the southwest by the middle of Wednesday morning. Scattered to numerous showers and thunderstorms will develop across the region once again on Wednesday afternoon into Wednesday evening. Periods of MVFR or even IFR are possible in and around showers and thunderstorms Wednesday afternoon into Wednesday evening. && .PRELIMINARY POINT TEMPS/POPS... Miami 76 87 80 90 / 60 40 10 20 West Kendall 75 87 78 90 / 60 40 20 20 Opa-Locka 76 87 78 90 / 60 40 10 20 Homestead 75 87 78 89 / 60 40 20 20 Fort Lauderdale 76 85 80 89 / 60 40 10 20 N Ft Lauderdale 75 86 79 88 / 60 40 10 20 Pembroke Pines 75 87 78 90 / 60 40 10 20 West Palm Beach 74 87 77 88 / 60 40 10 20 Boca Raton 75 85 78 89 / 60 40 10 20 Naples 74 87 76 91 / 50 50 20 30 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...Flood Watch until 8 PM EDT this evening for FLZ069>075-172>174. AM...None. GM...None. && Update/Aviation...BNB Today through Thursday and Marine...CWC Thursday Night through Tuesday...AR Visit us at weather.gov/miami Follow us on Facebook and Twitter at: www.facebook.com/nwsmiami www.twitter.com/nwsmiami
Hazardous Weather Outlook for South Florida...UPDATED National Weather Service Miami FL 1048 AM EDT Wed Jun 16 2021 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 170200- 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- 1048 AM EDT Wed Jun 16 2021 ...Some Strong To Even Severe Storms This Afternoon... ...Flood Watch In Effect For Southern Areas Of South Florida Through This Evening... This hazardous weather outlook is for South Florida. .DAY ONE...TODAY AND TONIGHT Flooding: Repeated heavy rainfall from thunderstorms will lead to flooding over urbanized and poorly drained areas along the east and west coast through this evening. A Flood Watch is in effect for Broward, Miami-Dade, Collier, and Mainland Monroe Counties from the middle of this morning through this evening. Thunderstorms: Numerous to widespread showers and thunderstorms will develop once again today. Some of these thunderstorms could become strong to severe containing gusty winds, frequent lightning, and hail up to quarter size. An isolated severe storm or two is possible. Hail: Hail up to quarter size is possible with the strongest storms this afternoon. Wind: The strongest thunderstorms could produce wind gusts in excess of 50 mph. Tornadoes: There could be one or two isolated weak tornadoes this afternoon with the strongest storms especially over the east coast metro areas of South Florida. Waterspouts: A few waterspouts are possible across the local waters of South Florida today. Temperatures: Heat indices will get up to around 100 degrees this afternoon over the interior areas of South Florida. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A chance of showers and thunderstorms remains in place through the end of the week. The primary impacts from the thunderstorms will be gusty winds, lightning, and the potential for localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation could be needed this afternoon especially over the eastern areas of South Florida. Spotters are encouraged to report high wind, hail, 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. Baxter
Special Weather Statement
National Weather Service Miami FL
1243 PM EDT Wed Jun 16 2021
FLZ071-072-074-172-173-161745-
Inland Broward County FL-Coastal Broward County FL-
Metro Broward County FL-Metropolitan Miami Dade FL-
Coastal Miami Dade County FL-
1243 PM EDT Wed Jun 16 2021
...SIGNIFICANT WEATHER ADVISORY FOR BROWARD COUNTY UNTIL 145 PM
EDT...
* At 1243 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm over St. George, or near Plantation,
moving north at 15 mph.
* Nickel size hail and wind gusts up to 50 mph possible with this
storm.
* Locations impacted include...
Fort Lauderdale, Pembroke Pines, Hollywood, Miramar, Coral Springs,
Pompano Beach, Davie, Plantation, Sunrise, Boca Raton, Deerfield
Beach, Tamarac, Margate, Lighthouse Point, Lauderdale-By-The-Sea,
Hallandale, Lauderhill, Coconut Creek, Oakland Park and North
Lauderdale.
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 2633 8004 2596 8011 2598 8029 2633 8035
2634 8023 2633 8021 2633 8010 2632 8010
2633 8009 2632 8009 2632 8008 2633 8008
TIME...MOT...LOC 1643Z 181DEG 14KT 2612 8021
BAXTERSpecial Weather Statement
National Weather Service Miami FL
114 PM EDT Wed Jun 16 2021
FLZ069-070-161800-
Coastal Collier County FL-Inland Collier County FL-
114 PM EDT Wed Jun 16 2021
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN COLLIER COUNTY UNTIL 200
PM EDT...
* At 113 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm over Golden Gate, or near Naples,
moving north at 15 mph.
* Small hail, funnel clouds, and wind gusts up to 50 mph possible
with this storm.
* Locations impacted include...
Naples, Marco Island, Golden Gate Estates, Cape Romano, Belle
Meade, Orangetree, Golden Gate, East Naples, Lely Resort, Big
Corkscrew Island, Vineyards, Royal Palm Hammock, Naples Park, Marco
Island Airport, Naples Manor, West Toll Gate On Alligator Alley,
North Naples, Pelican Bay, Corkscrew Swamp Sanctuary and Lely.
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.
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 2633 8184 2633 8182 2632 8182 2632 8166
2642 8166 2642 8157 2648 8156 2602 8130
2579 8170 2580 8175 2599 8184
TIME...MOT...LOC 1713Z 183DEG 14KT 2618 8175
WeinmanPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
119 PM EDT WED JUN 16 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0109 PM TSTM WND GST 3 NNE LAUDERDALE LAKES 26.20N 80.18W
06/16/2021 M46 MPH BROWARD FL ASOS
ASOS STATION KFXE FT LAUDERDALE EXECUTIVE
REPORTED A WIND GUST OF 46MPH AT 1:09PM.
ELEVATION IS 10 FEET.
&&
HADIThe Miami radar (KAMX), 73 km away, was scanning. The volume nearest the first event began at 17:23 UTC.
1 thunderstorm wind. Local standard time, as filed.
Broadcast media reported several large trees snapped in the Woodlake Isles Community in Margate. Time and wind speed estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2021Every state in 2021This day in weather historyWarnings in Florida, June 2021
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: 960051.