Deep easterly flow allowed for ample moisture to advect into South Florida. This moisture, combined with an upper level low centered over the northern Bahamas resulted in scattered showers and thunderstorms to develop.
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The episode as NWS MFL wrote it up.
Deep easterly flow allowed for ample moisture to advect into South Florida. This moisture, combined with an upper level low centered over the northern Bahamas resulted in scattered showers and thunderstorms to develop. A strong storm that moved over Palm Beach County produced a funnel cloud.
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 1, 2:31 PM EST, 2 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 331 PM EDT Tue Jun 1 2021 .SHORT TERM(Today through Wednesday)... Low pressure remains aloft to the east of South Florida near the Bahamas. At the surface, Atlantic high pressure will keep a steady easterly flow pattern over the region through the short term forecast period. The moist pattern continues though the pocket of colder air aloft has moderated a bit. Overall, the moist and stormy pattern appears to be the main story with some moderation at times with the sea breeze circulation enhancing convection inland and west in the afternoons with the Atlantic being the focus during the overnights and mornings. Cloud cover will keep temperatures from reaching into the 90s except for some isolated spots in Southwest Florida during the afternoons. Overnight temperatures will remain in the 70s along the coasts including most of the east coast metro areas. Overall, a summerlike pattern has taken hold over South Florida aided by some extra moisture and cooler air aloft. Some strong storms cannot be ruled out each afternoon, mainly around boundary interactions and collisions, with a focus over Southwest Florida due to the easterly flow pattern. .LONG TERM... Thursday through Friday night... A upper level trough will gradually weaken with a weak surface high to the northeast. This will allow for east to southeasterly winds through the extended. Moisture will remain in place across the area with showers and thunderstorms possible each day. Given the steering flow the greatest coverage each afternoon will be over Gulf Coast and inland northern portions of the area and Lake Okeechobee. Locally heavy rainfall and lightning strikes will be the main impacts with these showers and storms. Temperatures should be at or slightly below normal given decent cloud cover and rain chances throughout the rest of the week. This Weekend into Early Next Week... The surface high pressure will begin to strengthen and easterly winds will begin to increase across the region. Decent moisture will still remain across the region but with showers and thunderstorms more diurnally driven. Showers over the local waters and east coast in the morning, before a sea breeze pattern develops in the afternoon. Showers and thunderstorms will continue with potentially a slight drop in overall coverage. Gusty wind and heavy rainfall will be possible in any of the stronger storms. As we move into Monday models bring a slot of drier air at least in the mid-levels which may help lower rain chances early next week, but we will see how things evolve. High temperatures each afternoon will be near average in the upper 80s to low 90s && .AVIATION(18Z TAFS)... Easterly flow as the unsettled pattern continues. Gulf sea breeze has developed, turning APF out of the west. Convection will spread westward through the afternoon as the Atlantic sea breeze advances inland. Terminals directly impacted by convection could experience sub-VFR. Short-fused AMDs likely today. Convection over land should diminish after sunset, though activity will likely refocus over the Atlantic overnight for a similar pattern on Wednesday. && .MARINE... Scattered to numerous shower/thunderstorm activity through the weekend. East/southeast flow may increase to near cautionary levels by the middle of the week. While seas are forecast to remain below advisory levels, winds and seas may be locally enhanced near any storms. Waterspouts are possible across all local waters in this environment. && .PRELIMINARY POINT TEMPS/POPS... Miami 76 87 76 86 / 50 70 60 60 West Kendall 74 87 75 87 / 50 70 60 60 Opa-Locka 76 87 76 86 / 50 70 60 60 Homestead 75 86 76 85 / 50 60 60 60 Fort Lauderdale 76 85 76 85 / 50 70 60 60 N Ft Lauderdale 75 86 75 85 / 50 70 60 60 Pembroke Pines 76 87 76 86 / 50 70 60 60 West Palm Beach 74 86 75 85 / 50 70 50 60 Boca Raton 75 85 75 85 / 50 70 60 60 Naples 71 89 72 88 / 30 80 40 60 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && Tonight/Wednesday and Aviation/Marine...RAG Wednesday Night through Tuesday...Kelly 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 1207 PM EDT Tue Jun 1 2021 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 020415- 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- 1207 PM EDT Tue Jun 1 2021 ...Scattered Thunderstorms Mainly over Southwest Florida... ...Atlantic Beaches: Elevated Rip Current Risk... This hazardous weather outlook is for South Florida. .DAY ONE...THIS AFTERNOON AND TONIGHT Thunderstorms: Scattered thunderstorms will be possible today, mainly over Southwest Florida. The primary hazards will be frequent lightning and localized flooding. Small hail cannot be ruled out with the strongest storms. Rip Currents: Easterly flow will allow for an elevated rip current conditions today across the Atlantic beaches. Waterspouts: Waterspouts are possible across all local waters. Wind: Wind gusts in excess of 40 mph are possible over the western half of South Florida. Visibility: Smoke from ongoing wildfires over interior Palm Beach County, interior Miami-Dade County, and interior Collier County could affect visibility across portions of the region today. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY Thunderstorm chances will continue through the work week. Some of the thunderstorms could produce strong wind gusts and localized flooding. The threat of rip currents will increase for the middle of the week along the east coast beaches of South Florida as easterly winds continue over the Atlantic waters. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however, individual spotters are encouraged to report high winds, flooding, and hail 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
243 PM EDT Tue Jun 1 2021
FLZ069-070-075-011930-
Coastal Collier County FL-Inland Collier County FL-
Mainland Monroe FL-
243 PM EDT Tue Jun 1 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL COLLIER COUNTY
UNTIL 330 PM EDT...
* At 243 PM EDT, National Weather Service meteorologists were
tracking a strong thunderstorm over Carnestown, or near Everglades
City, moving southwest at 10 mph.
* Small hail, funnel clouds, and winds in excess of 45 mph possible
with this storm.
* Locations impacted include...
Chokoloskee, Everglades City, Plantation Island, Carnestown,
Copeland, Cape Romano Aquatic Preserve and Jerome.
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 2602 8132 2582 8117 2573 8134 2573 8135
2575 8141 2579 8144 2577 8153 2590 8161
TIME...MOT...LOC 1843Z 058DEG 9KT 2590 8134
CWCThe Miami radar (KAMX), 120 km away, was scanning. The volume nearest the first event began at 19:34 UTC.
1 funnel cloud. Local standard time, as filed.
A member of the public shared a photo of a funnel cloud from a strong thunderstorm that formed west of Lion Country Safari and south of US 98.
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: 960029.