Suntree, Florida Weather Forecast Discussion

721
FXUS62 KMLB 121755
AFDMLB
Area Forecast Discussion
National Weather Service Melbourne FL
155 PM EDT Fri Sep 12 2025
...New AVIATION...
.KEY MESSAGES...
Issued at 315 AM EDT Fri Sep 12 2025
- Lingering front just south of Lake Okeechobee will continue
  higher rain chances and potential for locally heavy rainfall and
  minor flooding, mainly southeast of the I-4 corridor today and
  Saturday.
- A High Risk for rip currents will persist at area beaches today
  and may persist into the weekend.
- Drier air will gradually build into the area through late
  weekend into early next week, leading to lowering rain chances.
&&
.PREVIOUS DISCUSSION...
Issued at 315 AM EDT Fri Sep 12 2025
Today-Tonight...A stalled front will linger near to south of Lake
Okeechobee today, as a mid/upper level trough sweeps south-southeast
toward Florida. Low level NE flow and deep moisture, especially
closer to the front (PW values up to 2-2.3") will keep rain chances
elevated and continue a threat for locally heavy rainfall today into
tonight. There will be a better chance for showers and storms along
and northwest of the I-4 corridor this afternoon compared to
yesterday, with PoPs ~40-50%. However, greatest coverage of this
activity should still be focused southeast of the I-4 corridor and
toward Okeechobee County and the Treasure Coast where deepest
moisture resides (rain chances up to 60-70%). Weak steering flow and
coastal convergence from onshore flow will continue the potential of
locally heavy rainfall of 2-4" with any slower moving or persistent
banding of heavier showers and storms. This will continue the
potential for mostly minor flooding issues of roadways and poor
drainage areas. However, these impacts may be amplified slightly
leading to isolated instances of flash flooding if heavy rainfall
occurs over locations that have already seen heavy rainfall over
the past few days or any isolated totals exceed 4". A Marginal
Risk (at least 5% chance) of excessive rainfall expands northward
to include much of east central Florida today near to southeast of
I-4. A Slight Risk (at least 15% chance) of excessive rainfall
lingers along the southern Treasure Coast, where persistent
banding of showers and isolated storms have already been ongoing
overnight.
Winds may become a little breezy along the coast, mainly near to
north of the Cape this afternoon, around or just above 15 mph.
Otherwise northeast winds will increase to 10-15 mph across much of
the region today, with skies partly to mostly cloudy and highs
slightly below normal in the mid to upper 80s. Coastal showers and
storms producing locally heavy rainfall will continue to be possible
into tonight, with lows in the low to mid 70s.
High astronomical tides will continue to cause wave runup to near
the dune line during the early afternoon high tides today and into
the weekend. A High Risk of life-threatening rip currents also
continues today and may linger into the weekend.
Saturday-Sunday...Trough aloft moves into Florida this weekend and
stalls as a cutoff low tries to form within the base of the trough,
just off the southeast U.S. coast. This will shift front and deeper
moisture gradually south of the area, but low level NE flow will
keep enough low level moisture in place to keep rain chances
elevated, mainly in the form of onshore moving showers along the
coast Saturday, with PoPs around 60%, decreasing to 40-50% inland.
However, isolated to scattered storms will still be able to develop
with cooler temps aloft, sufficient instability, and unsettled
pattern aloft. Potential for locally heavy rainfall leading to minor
flooding issues persists into Saturday, southeast of the I-4
corridor. A Marginal Risk of excessive rainfall continues across
this area, except across Martin County where a Slight Risk of
excessive rainfall will linger. Rain chances remain around 40-50%
Sunday, and may continue to see a little higher coverage of showers
and isolated storms moving onshore north of the Cape where an
increase in low level NE winds is forecast. Breezy N/NE winds will
develop each afternoon along the coast, mainly north of the
Treasure Coast and highs will continue to reach around the mid to
upper 80s.
Monday-Thursday...There remains some differences in the model
guidance into next week with how upper level/surface features
evolve. The GFS keeps a trough across to just offshore the southeast
U.S. coast, with the ECMWF showing a cutoff low aloft developing and
retrograding slowly westward. Both models show some weak low
pressure development off the east coast of Florida, with the ECMWF
keeping this low a little closer to the coast. However, overall
forecast trends into next week indicate lowering rain chances
through at least early in the week to around 30-40% as drier air
continues to build into the region under lower level N/NE flow. Rain
chances then look to gradually rise into mid to late week as low
level flow gradually veers to the E/SE allowing moisture to increase
once again. Highs continue in the mid to upper 80s through the week,
with lows mostly in the low to mid 70s.
&&
.MARINE...
Issued at 315 AM EDT Fri Sep 12 2025
Today-Tuesday...Front near to south of Lake Okeechobee will
linger across south Florida through Saturday, before shifting
farther southward late weekend into early next week. This boundary
will continue higher coverage of showers and storms across the
coastal waters over the next couple days, with coverage gradually
then decreasing into early next week. N/NE winds will continue
over the coastal waters, and will produce poor boating conditions
at times, mainly north of the Cape, as they increase to 15-20
knots each afternoon and evening today and through the weekend.
Seas 3-5 feet today will also build up to 6 feet across the
Volusia waters and offshore Brevard waters this weekend. N/NE
winds will continue into early next week, with swells up to 6 feet
continuing mainly over the offshore waters.
&&
.AVIATION...
(18Z TAFs)
Issued at 149 PM EDT Fri Sep 12 2025
Another day of high coverage and multiple rounds of showers and
storms across the area. VFR conditions prevailing outside of
convection. However, VIS/CIG reductions in heavier showers and
storms are possible. Thus, TEMPOs have been included for most
terminals, with the exception of LEE/TIX/MLB, given the current
radar presentation. This will need to be monitored through the
afternoon. Coverage of showers and storms is forecast to diminish
towards sunset. But, they will remain possible along the coast
overnight, occasionally drifting onshore from the local Atlantic
waters. Northeast winds 10-15 kts, with gusts up to 20-25 kts,
especially along the coast and near DAB. Similar conditions are
forecast across the area Saturday.
&&
.PRELIMINARY POINT TEMPS/POPS...
DAB  73  84  72  84 /  60  60  40  50
MCO  72  87  71  87 /  30  40  20  40
MLB  74  86  73  86 /  40  50  30  40
VRB  72  87  72  87 /  50  50  30  30
LEE  71  86  70  86 /  10  20  10  30
SFB  72  86  71  86 /  30  50  20  40
ORL  72  86  72  86 /  30  40  20  40
FPR  72  86  71  87 /  50  50  30  30
&&
.MLB WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
&&
$$
DISCUSSION...Weitlich
AVIATION...Leahy

NWS MLB Office Area Forecast Discussion