The Atlantic seabreeze that developed during the late morning hours of June 7th, quickly moved west and collided with the Gulf breeze across Collier, Hendry, and Glades counties during the afternoon hours. Shower and storm development along these boundaries was enhanced by an upper level low across the eastern Gulf of Mexico, allowing several storms to become severe as a result of the collision,…
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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.
The Atlantic seabreeze that developed during the late morning hours of June 7th, quickly moved west and collided with the Gulf breeze across Collier, Hendry, and Glades counties during the afternoon hours. Shower and storm development along these boundaries was enhanced by an upper level low across the eastern Gulf of Mexico, allowing several storms to become severe as a result of the collision, leading to reports of hail across interior Collier and Hendry counties.
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 9, 1:40 PM EST, 1 hour 20 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 240 PM EDT Sat Jun 9 2018 .DISCUSSION... A summertime wet season pattern is in place through the forecast period. Models showing some weak troughing at 500mb in the region, which may help to enhance some of the convection at times. Also, a Bermuda high should help keep the wind generally out of the southeast. The models show the 500mb temps continue to be around -8.5C to -10C, allowing for some strong thunderstorms to develop, possibly even some isolated pulse severe storms each day. The main threat would be wind and hail. There is also the possibility of funnel clouds where boundaries collide. This pattern holds pretty much through the middle of the week. Then the models begin to diverge. The ECMWF continues with the pattern for a couple more days, before beginning to warm slightly for the beginning of next weekend, with a 500mb ridge beginning to build to the west. The GFS on the other hand, begins a warm up in the middle of the week, with a 500mb ridge building in from the east. This would help to change the pattern to more of a sea breeze driven pattern, rather than the somewhat random development we have been seeing. The GFS does then have a low pressure system developing by the end of the week over the central Gulf, and moving away from the area. There is low confidence in this solution at this time, and even if the system did develop, it may actually bring some subsidence over the Florida peninsula for next week, as it moves west, away from the area. For now, just keeping the typical diurnal cycle in place through the forecast period. && .MARINE... A Bermuda high is forecast to maintain a southeast wind through the forecast period. Showers and thunderstorms will be possible through at least the end of next week. Seas are generally forecast to be calm up to 2 feet for the Gulf and Atlantic waters. However, seas may become rough locally with any convection that occurs. && .AVIATION... The storms should remain west of the east coast metro areas this afternoon into this evening and could affect KAPF taf site. However, some showers will continue to affect the east coast taf sties through the afternoon. Therefore, VCSH for the east coast taf sites this afternoon with VCTS for KAPF taf site. The winds will remain easterly at 5 to 10 knots over the east coast taf sites, and westerly at 5 to 10 knots at KAPF taf site. The ceiling and vis should remain in VFR conditions but could fall down into MVFR or IFR conditions with the showers or thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 74 88 74 87 / 20 40 20 30 Fort Lauderdale 77 86 77 86 / 20 50 20 30 Miami 77 86 76 87 / 20 60 20 40 Naples 75 89 74 89 / 10 50 20 60 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && DISCUSSION...13 MARINE...13 AVIATION...54/BNB
Hazardous Weather Outlook for South Florida...UPDATED National Weather Service Miami FL 258 PM EDT Sat Jun 9 2018 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 100700- 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- 258 PM EDT Sat Jun 9 2018 ...Strong to Severe Storms Possible This Afternoon and Evening... This hazardous weather outlook is for South Florida. .DAY ONE...THIS AFTERNOON AND TONIGHT Thunderstorms: Scattered to numerous thunderstorms are expected across most of South Florida. The primary threats are lightning, hail, gusty winds, and localized minor flooding. Wind: The strongest thunderstorms will be capable of producing strong wind gusts to around 55 mph, focused around boundary collisions today. Hail: Hail up to the size of nickels is possible with the strongest storms today. Flooding: Slow moving thunderstorms will bring the threat of minor flooding of streets and poorly drained, low-lying areas. Waterspouts: Isolated waterspouts are possible with any thunderstorms that do develop this afternoon into this evening. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY Scattered thunderstorms are expected each day, mainly during the afternoons. The focus will be mainly across the interior into early next week. The primary threat will be lightning, although gusty winds and locally heavy rain are also possible. .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. For more information...visit the National Weather Service in Miami website at www.weather.gov/miami. RAG
Special Weather Statement
National Weather Service Miami FL
256 PM EDT SAT JUN 9 2018
FLZ069-070-091930-
Coastal Collier County FL-Inland Collier County FL-
256 PM EDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COLLIER COUNTY UNTIL
330 PM EDT...
* At 255 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Royal Palm Hammock, or 12 miles
south of Golden Gate Estates, moving northwest at 5 mph.
* Small hail, excessive cloud-to-ground lightning, and winds in
excess of 45 mph will be possible with this storm.
* Locations impacted include...
Royal Palm Hammock, Lely Resort, Picayune Strand State Forest,
and Port Of The Island.
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 2594 8141 2590 8156 2605 8169 2613 8170
2614 8145
TIME...MOT...LOC 1855Z 146DEG 6KT 2606 8158
MOLLEDASpecial Weather Statement National Weather Service Miami FL 304 PM EDT SAT JUN 9 2018 FLZ073-173-174-091930- Far South Miami-Dade County FL-Inland Miami-Dade County FL- Coastal Miami Dade County FL- 304 PM EDT SAT JUN 9 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL MIAMI-DADE COUNTY UNTIL 330 PM EDT... * At 304 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm near Florida City, or near Homestead. This storm was nearly stationary. * Small hail, excessive cloud-to-ground lightning, and winds in excess of 45 mph will be possible with this storm. * Locations impacted include... Homestead, Homestead Miami Speedway, The Redland, Florida City, Homestead Base, Everglades National Park, Leisure City and Naranja. 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 2536 8036 2530 8056 2546 8064 2553 8035 TIME...MOT...LOC 1904Z 149DEG 2KT 2541 8048 MOLLEDA
Special Weather Statement National Weather Service Miami FL 315 PM EDT SAT JUN 9 2018 FLZ071-072-091945- Inland Broward County FL-Metro Broward County FL- 315 PM EDT SAT JUN 9 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BROWARD COUNTY UNTIL 345 PM EDT... * At 315 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over Sunrise. This storm was nearly stationary. * Small hail, excessive cloud-to-ground lightning, and winds in excess of 45 mph will be possible with this storm. * Locations impacted include... Fort Lauderdale, Coral Springs, Pompano Beach, Davie, Plantation, Sunrise, Tamarac, Margate, Lauderhill, Weston, Coconut Creek, Oakland Park, North Lauderdale, Lauderdale Lakes, Broadview-Pompano Park, St. George, Pine Island Ridge, Village Park, Broadview Park and Sawgrass Mills Mall. 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 2612 8038 2629 8039 2627 8015 2606 8020 TIME...MOT...LOC 1915Z 242DEG 2KT 2618 8029 MOLLEDA
Special Weather Statement
National Weather Service Miami FL
329 PM EDT SAT JUN 9 2018
FLZ066-070-092000-
Hendry FL-Inland Collier County FL-
329 PM EDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL COLLIER AND CENTRAL
HENDRY COUNTIES UNTIL 400 PM EDT...
* At 329 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Felda, or near Immokalee,
moving southeast at 10 mph.
* Small hail, excessive cloud-to-ground lightning, and winds in
excess of 45 mph will be possible with this storm.
* Locations impacted include...
Montura, Immokalee, Felda, Devils Garden, Keri and Bunker Hill.
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 2648 8153 2668 8145 2670 8100 2648 8104
2632 8132
TIME...MOT...LOC 1929Z 307DEG 12KT 2649 8139
MOLLEDASpecial Weather Statement
National Weather Service Miami FL
332 PM EDT SAT JUN 9 2018
FLZ069-070-092000-
Coastal Collier County FL-Inland Collier County FL-
332 PM EDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN COLLIER COUNTY UNTIL
400 PM EDT...
* At 331 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm near Royal Palm Hammock, or 12 miles
east of Marco Island. This storm was nearly stationary.
* Small hail, excessive cloud-to-ground lightning, and winds in
excess of 45 mph will be possible with this storm.
* Locations impacted include...
Royal Palm Hammock, Marco Island Airport, Fakahatchee Strand State
Preserve, Picayune Strand State Forest, and Port Of The Island.
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 2590 8154 2601 8168 2615 8168 2614 8143
2597 8141
TIME...MOT...LOC 1931Z 263DEG 1KT 2600 8154
MOLLEDASpecial Weather Statement
National Weather Service Miami FL
352 PM EDT SAT JUN 9 2018
FLZ070-092015-
Inland Collier County FL-
352 PM EDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL COLLIER COUNTY UNTIL
415 PM EDT...
* At 352 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm over Golden Gate Estates. This storm
was nearly stationary.
* Small hail, excessive cloud-to-ground lightning, and winds in
excess of 45 mph will be possible with this storm.
* Locations impacted include...
Golden Gate Estates, West Toll Gate On Alligator Alley, Orangetree
and Intersection I-75 And Everglades Blvd.
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 2615 8167 2620 8169 2629 8162 2624 8150
2615 8146
TIME...MOT...LOC 1952Z 215DEG 4KT 2621 8161
MOLLEDAThe Miami radar (KAMX), 139 km away, was scanning. The volume nearest the first event began at 20:00 UTC.
3 hail. Local standard time, as filed.
NBC2 Fort Myers relayed a report of penny to dime sized hail associated with a thunderstorm in Golden Gate Estate. Time estimated via radar.
Report relayed via NBC2 Fort Myers social media account of quarter sized hail in Immokalee.
Report received from WINK-TV of quarter sized hail in Fort Denaud.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2018Every state in 2018This day in weather historyWarnings in Florida, June 2018
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: 771173, 771174, 771175.