397 FXUS62 KMFL 281109 AFDMFLArea Forecast Discussion National Weather Service Miami FL 709 AM EDT Sun Sep 28 2025
...New AVIATION...
.SHORT TERM... (Today through Monday) Issued at 122 AM EDT Sun Sep 28 2025
The focus of the short term forecast period relates to Tropical Depression Nine as it will be enhancing its development during the short term period. Tropical Depression Nine currently sits just north of the northeast coast of Cuba and is expected to take a NNW track in the next 24-48 hours before uncertainty increases in its eventual track at that point. The latest forecast from the National Hurricane Center is that the system will reach Tropical Storm strength later this morning and eventually low-end Hurricane strength as it moves further up the coast and away from South Florida.
At this time, impacts from this system are mainly expected to occur in the offshore waters where a Tropical Storm Warning is in effect and currently no headlines issued for land areas. It is highly unlikely at this point that land areas in South Florida will see any possibility for Tropical Storm force winds, especially since even the further offshore waters are expected to see low-end Tropical Storm force winds out of the N/NW perhaps in the 40-45 mph range. However, this does not completely rule out the risk for further elevated winds across the region or in the offshore waters, it only states that it`s highly unlikely.
Overall, the primary threat from Tropical Depression Nine right now looks to still be potential for heavy rainfall. East coast areas would be at highest risk, but right now a reasonable worst case scenario (10% chance for exceedance) for the next 72 hours across the east coast is 3-5" for most areas and 4-6" for the Palm Beach county coast. With these amounts being over several days, it would likely not cause significant flooding concerns. However, there is still time for minor changes in the development and track of this system, and any minor change can have big changes in relation to impacts. Therefore, regardless of development and the system`s track, enough heavy rainfall can occur that can lead to localized flooding both today and Monday.
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.LONG TERM... (Monday night through Saturday) Issued at 122 AM EDT Sun Sep 28 2025
The tropical system that is currently Tropical Depression Nine will be further departing from the area at the beginning of the long term forecast period, so impacts from it will begin to be less and less heading into the middle of next week. Some lingering marine and beach hazards will be possible as it moves northwards in the early week period, but otherwise a quasi-zonal flow pattern is expected to develop by mid-week period with perhaps a weak broad upper level ridge. Additionally, some drier air is expected to be filtered into South Florida behind the tropical system`s departure. As a result, rain chances drop pretty significantly to mostly 20-30% for Tuesday and Wednesday this week. By the end of the week, guidance is hinting at mid-level troughing development across the SE states and Gulf plus some deeper moisture return, which could lead to an increase in PoPs once again for the end of the week and into next weekend. However, with this being at the tail end of the forecast period uncertainty is still rather high.
Daily high temperatures for the middle of the week are expected in the low 90s for most areas. By the end of next week, a slight decrease to the mid and upper 80s for daily high temperatures is expected across the region.
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.AVIATION... (12Z TAFS) Issued at 710 AM EDT Sun Sep 28 2025
Scattered showers and a few thunderstorms may bring periods of MVFR/IFR across the east coast terminals today as outer bands from TD 9 move closer to the area. Winds increase out of the NNE after 15z and will range between 10 to 15 kts through the afternoon. Gusts of 20 to 25 kts will be possible across the east coast terminals this afternoon. At KAPF, winds become NNW in the afternoon and sct storms could develop during the late afternoon. Winds shift back to the NW late tonight but remain gusty through the TAF period.
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.MARINE... Issued at 122 AM EDT Sun Sep 28 2025
A moderate to fresh breeze is expected to develop across the local Atlantic waters later today and extending into early this next week as Tropical Depression Nine (likely to become Tropical Storm Imelda) works its way northwards in the next several days. These winds will be mainly out of the north today before shifting NW on Monday. This will be similar for the Gulf waters, but winds will not be as strong and likely just remain at a moderate breeze.
Hazardous winds and seas are expected for the Atlantic waters over the next few days as increasing swell and winds occurs as a result of the tropical disturbance. Seas will rise to 8-11 feet by Monday. Additionally, scattered showers and thunderstorms are expected each day.
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.BEACHES... Issued at 122 AM EDT Sun Sep 28 2025
A high risk for rip currents is in place across all Atlantic beaches as increasing winds and swell occur due to a strengthening tropical system passing nearby in the offshore Atlantic waters. An elevated risk could persist for several days into the middle of this week or later as a result of this.
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.PRELIMINARY POINT TEMPS/POPS... Miami 88 75 91 76 / 80 50 40 20 West Kendall 89 75 91 75 / 80 30 40 20 Opa-Locka 89 76 91 76 / 80 50 40 20 Homestead 88 75 91 75 / 70 30 40 20 Fort Lauderdale 86 75 89 75 / 80 60 40 20 N Ft Lauderdale 86 76 89 76 / 80 60 40 20 Pembroke Pines 89 76 92 76 / 70 50 40 20 West Palm Beach 86 75 87 75 / 80 70 50 20 Boca Raton 87 75 89 74 / 80 60 50 20 Naples 92 76 90 78 / 50 20 20 10
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.MFL WATCHES/WARNINGS/ADVISORIES... FL...High Rip Current Risk through Monday evening for FLZ168-172-173.
AM...Tropical Storm Watch for AMZ630-651.
Tropical Storm Warning for AMZ650-670-671.
GM...None. &&
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SHORT TERM...Redman LONG TERM....Redman AVIATION...17
NWS MFL Office Area Forecast Discussion