Showers and storms once again developed along the seabreezes during the late morning and afternoon hours across South Florida. Boundary collisions between the seabreeze and ongoing storms produced a funnel cloud over the western Miami-Dade County metro area during the afternoon hours.
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The episode as NWS MFL wrote it up.
Showers and storms once again developed along the seabreezes during the late morning and afternoon hours across South Florida. Boundary collisions between the seabreeze and ongoing storms produced a funnel cloud over the western Miami-Dade County metro area during the afternoon hours.
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 29, 12:59 PM EST, 1 hour 9 minutes earlier.
Area Forecast Discussion National Weather Service Miami FL 159 PM EDT Fri Jun 29 2018 .AVIATION... Showers and thunderstorms will continue to overspread the southern peninsula of Florida this afternoon and evening. Sub-VFR conditions are possible with brief bouts of IFR/LIFR not out of the question. A light southerly to southwesterly flow will continue through much the period outside of the variable gustiness of convection and the pushes of the sea breezes. Some uncertainty on Saturday with the potential for a Saharan Air Layer near the region. Convection could linger overnight over the Atlantic and return in the morning hours. && .PREV DISCUSSION... /issued 1213 PM EDT Fri Jun 29 2018/ UPDATE... Showers and thunderstorms have developed over Southwest Florida this morning and will traverse the peninsula through the rest of the day. Previous forecast is on track with no updates anticipated through the forecast issuance this afternoon. Storms could be strong, particularly along boundary collisions. Storm movement will be limited to propagation as storms develop and decay, as well as along boundary movements. Have updated the Hazardous Weather Outlook to show a larger threat for heavy rainfall, gusty winds, small hail, and waterspouts/funnel clouds. PREV DISCUSSION... /issued 353 AM EDT Fri Jun 29 2018/ DISCUSSION... Today through Sunday: Another moist day is on tap today for South Florida. A surface trough over northern Florida will influence the wind direction to be from the southwest across southwest Florida. Winds will be southerly for southeast Florida. This will enhance low- level convergence over the state today. Although scattered to numerous showers and thunderstorms are expected areawide this afternoon, this wind flow means that the eastern half of South Florida is more likely to see more activity than the western half, especially during the middle to late afternoon. Storm motion should be very slow from SSW to NNE. As the afternoon progresses, the thunderstorm activity will be influenced by colliding outflow boundaries. Due to the moist conditions and slow storm motion, some flooding of roads in poor drainage areas is a possibility today. Another interesting feature to note: The MCS/squall line that moved from the GA/TN/NC border yesterday southward to the FL Panhandle yesterday evening has continued to progress southward over the northeastern Gulf of Mexico and the west coast of Florida overnight although it is much weaker now than it was on Thursday. We are watching this because the boundary could continue southward and help to enhance thunderstorms for our northwestern-most counties early this afternoon, especially if those areas receive ample heating earlier in the day. SPC has extended the Day 1 Marginal Risk southward to near the border of our CWA just a few miles north of Glades County. Dynamic parameters will be unfavorable to produce severe storms as there will be no wind shear or SRH to speak of. However, favorable thermodynamic parameters along with the enhanced convergence may lead to a few strong storms this afternoon with gusty winds, first for northwestern parts of the area (early-mid afternoon) and then for more eastern areas (mid- late afternoon). Maximum temperatures will be in the low 90s, typical for this time of year. By Saturday, southeast to south flow becomes a little more established, along with a SAL layer advecting over South Florida. This layer may act to slightly dry and stabilize the atmosphere, leading to less areal coverage of thunderstorms. Nonetheless, enough moisture will still exist for showers and storms to develop over the interior in the early afternoon and push towards the northwest, away from the east coast metro. On Sunday, the SAL will likely still be affecting South FL but there will be moisture present as well, which will be mixing with the SAL, causing it to become more diffuse. Monday through Thursday: On Monday, east to southeast low-level flow will continue, quite similar to the weekend weather under the influence of weak low-level ridging. Moisture is likely to gradually increase to near normal levels for this time of year Tuesday and beyond with southeast or easterly flow. By the middle of next week, the GFS and ECMWF show a deep-layered trough moving westward in the western Atlantic between Bermuda and the southeast U.S. coast. The GFS had it moving a little faster and closer to Florida compared to the yesterday's 12Z ECMWF. If the GFS were to be correct, then it would enhance moisture, along with widespread showers and storms around Day 7. However, at this time, my thinking is to lean more with the ECMWF, which is also in line with the latest WPC forecast chart for Thursday of next week, which depicts a trough well offshore the southeastern U.S., farther from Florida. MARINE... A general southerly wind flow will develop today, becoming southeasterly on Saturday and east to east-southeast Sunday through early next week. Winds will remain generally around 10 knots through the forecast period with a few periods of 10-15 kts for the Atlantic waters late today into this weekend. Seas will be around 2 feet this weekend. Scattered showers and thunderstorms are possible each day. Locally higher winds and seas will be possible in and around and showers or thunderstorms. && .PRELIMINARY POINT TEMPS/POPS... West Palm Beach 77 90 77 91 / 30 40 20 40 Fort Lauderdale 79 90 79 89 / 30 30 20 30 Miami 78 90 79 91 / 20 30 10 30 Naples 77 91 77 92 / 30 40 20 40 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...None. AM...None. GM...None. && AVIATION...02/RAG
Hazardous Weather Outlook for South Florida...UPDATED National Weather Service Miami FL 1122 AM EDT Fri Jun 29 2018 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 300330- 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- 1122 AM EDT Fri Jun 29 2018 ...THUNDERSTORMS LIKELY, SOME STRONG WITH LOCALLY HEAVY RAIN... This hazardous weather outlook is for South Florida. .DAY ONE...THIS AFTERNOON AND TONIGHT Thunderstorms: Thunderstorms are forecast to become widespread through early evening. The primary threat will be cloud to ground lightning, although locally heavy rainfall is possible. A few thunderstorms may become strong with very gusty winds, funnel clouds/waterspouts, and small hail. Wind: Isolated strong thunderstorms are expected this afternoon. These will be capable of producing wind gusts to 50 mph. Flooding: Locally heavy rainfall in association with slow-moving thunderstorms may lead to isolated flooding across the Miami, Fort Lauderdale, and West Palm Beach metropolitan area. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered to numerous showers and thunderstorms are expected each day, mainly during the afternoon and early evening hours. The highest coverage is generally expected over interior South Florida. Cloud- to-ground lightning is the primary threat. .SPOTTER INFORMATION STATEMENT... Widespread spotter activation is not anticipated, however individual spotters are encouraged to report high wind 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 1115 AM EDT FRI JUN 29 2018 FLZ070-291600- Inland Collier County FL- 1115 AM EDT FRI JUN 29 2018 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL COLLIER COUNTY UNTIL NOON EDT... * At 1115 AM EDT, National Weather Service meteorologists were tracking a strong thunderstorm 11 miles southeast of Golden Gate Estates, moving northeast at 10 mph. * Small hail, funnel clouds, and winds in excess of 45 mph possible with this storm. * Locations impacted include... Ave Maria, Golden Gate Estates, Miles City, Sunniland and Intersection I-75 And Everglades Blvd. PRECAUTIONARY/PREPAREDNESS ACTIONS... These winds can down small tree limbs and branches, and blow around unsecured small objects. Seek shelter in a safe building until the storm passes. 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 2601 8144 2615 8157 2636 8139 2616 8119 TIME...MOT...LOC 1515Z 228DEG 7KT 2613 8145 RAG
The Miami radar (KAMX), 17 km away, was scanning. The volume nearest the first event began at 19:06 UTC.
1 funnel cloud. Local standard time, as filed.
Photograph and report relayed via WSVN channel 7 of a funnel cloud near Southwest 8th Street and Southwest 152nd Avenue.
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: 770923.