743
FXUS62 KMLB 021127
AFDMLB

Area Forecast Discussion
National Weather Service Melbourne FL
727 AM EDT Wed Sep 2 2026

...New AVIATION...

.KEY MESSAGES...
Issued at 221 AM EDT Wed Sep 2 2026

- There is a High risk of dangerous rip currents at the Volusia
  and Northern Brevard beaches today. A Moderate risk continues at
  the Treasure Coast and Southern Brevard beaches. Residents and
  visitors should check in with lifeguards before entering the
  surf.

- A wet weather pattern will persist across East Central Florida
  into the weekend. Storm hazards today will be gusty winds to
  around 45 mph, occasional to frequent cloud to ground lightning,
  and locally heavy rainfall that could lead to flooding.

- Muggy conditions and seasonably hot temperatures in the upper
  80s to low 90s will continue the next couple days, then
  temperatures increase a couple degrees going into the weekend.
  Peak afternoon heat indices remain in the triple digits.

&&

.DISCUSSION...
Issued at 221 AM EDT Wed Sep 2 2026

Today-Tonight...Portions of this discussion are getting a bit
repetitive (some parts even copy-pasted), but as long as the local
pattern is dominated by high moisture in onshore flow, we`ll
continue to keep seeing the same conditions day to day. Ridging
aloft has settled over the southeastern US, flattened by a low
pressure system tracking across southeast Canada, and between
troughs/low pressure systems over the west coast and western
Atlantic. The ridge remains far enough north disturbances
transiting the southern flank will pass above Florida and the
Gulf. At the surface the ridge axis of the Bermuda high continues
its residency north of Florida, and low pressure systems to the
north and an inverted trough entering the local Atlantic waters
have weakened/shifted the pressure gradient. Low-level flow
remains onshore, but will vary between northeasterly and
southeasterly as the trough approaches and moves inland.
Anomalously high moisture will accompany the trough, keeping rain
chances well above normal. We`ll continue the pattern of isolated
to scattered showers developing over the Atlantic waters in the
early morning, some of which may move onshore, then additional
scattered to numerous showers will develop inland/near the coast
in the late morning to early afternoon, pushing inland with a
quick/diffuse east coast sea breeze through the rest of the
afternoon and early evening. While subsidence behind the sea
breeze should knock down coverage east the boundary, the multiple
disturbances and lurking outflow boundaries could fire off
additional rounds of convection at any point. So far the trough
hasn`t kicked up much more convection than we`ve seen previous
days/nights, but should some upper-level support swing through at
the right time there could be flare up leading to training of
heavy rainfall along the coast from the Cape north, and wider
coverage of showers and storms elsewhere.

Model and upper air soundings continue to show a nearly saturated
environment (PWATs 2.2-2.4", up to 2.5" in convection) with long-
skinny instability profiles (CAPE generally 1,000-2,000 J/kg,
though some surface based parcels could push towards 3,000 J/kg)
and warm mid-levels (T500 -5C to -4C) characteristic of heavy
rainfall. Weak easterly steering flow will gradually usher showers
and storms towards the west side of the peninsula and a sea breeze
collision over there, but varying low-level flow and chaotic
boundary interactions could cause erratic storm motion. Storms or
heavy showers that become slow or hung up on boundaries could
produce a quick 2-3" of rainfall leading to ponding of water on
roads and minor flooding of urban, low-lying, or poor drainage
areas. There is a very low (up to 5%) chance for one or two spots
to receive +4" of rainfall leading to greater flooding impacts,
and the Weather Prediction Center has outlooked all of East
Central Florida in a Marginal (level 1 of 4) risk for excessive
rainfall. In addition to the rainfall, stronger storms and heavy
showers will be capable of gusty winds to around 45 mph from
water loading. Occasional to frequent cloud to ground lightning
will accompany thunderstorms.

As for the rest of the forecast, lots of cloud cover keeps
temperatures seasonable with highs in the U80s-L90s, and lows in
the 70s. Peak afternoon heat indices 98-106. Be sure to take
frequent breaks in the shade or air conditioning if spending
prolonged time outdoors to avoid the development of heat-related
illness. Incoming swell from back when Dolly reached tropical
storm strength has arrived at the Volusia and Northern Brevard
coasts (NOAA buoys 41009 and 41010 showing swell periods up to 13s
from the ESE-SE) and a High risk of dangerous rip currents has
been issued for these beaches. The Bahamas has provided some
shelter from this long period swell to the Treasure and Southern
Brevard beaches, where a Moderate risk of rip currents continues.
Will being monitoring these beaches, and may need to upgrade the
risk if conditions warrant.

Thursday-Friday...A little bit of forecast uncertainty, mainly
Friday. The low pressure system in southeastern Canada deepens
while sliding towards New England and the Canadian Maritimes,
amplifying the pattern over the CONUS and causing the mid-upper
level ridge over the Southeast to quickly slither back into the
Central US. The western periphery of the Bermuda high will
further weaken as the the surface ridge axis begins to drop
towards Florida. Low-level flow technically remains onshore, but
becomes southeasterly Thursday and southerly Friday. A second,
very weak surface trough looks to develop near the coast Thursday,
which will reinforce the high moisture, then there could be some
dry air intrusion to the south Friday according to the GFS, but
the ECM currently doesn`t agree. There`s also some disagreement on
steering flow Friday, with the GFS switching southwesterly while
the ECM is more southerly. Thursday will continue to favor the
pattern we`ve seen the last few days, while Friday could finally
see a change up as the southerly low-level winds would shift the
sea breeze collision and highest chances for afternoon storms from
the west coast towards the interior, and the southerly to
southwesterly steering flow could push some of that activity back
towards our coast, resulting in broad high chances over the
entire area. Mid levels remains warm, but some additional
instability Friday could support higher coverage of stronger
thunderstorms than previous days. Wind gusts from storms and heavy
showers likely to not exceed 45 mph Thursday, but higher gusts
may be possible Friday if the drier air is delivered. Occasional
to frequent lightning may become more frequent Friday. The heavy
rainfall and flooding threat may begin to finally trail off, but
for now all of East Central Florida remains outlooked in a
Marginal (level 1 of 4) risk for excessive rainfall Thursday. A
little bit of warming is forecast, but highs remain in the
U80s-L90s despite maybe increasing a degree or two. Peak afternoon
heat indices 100-107.

Saturday-Tuesday...Upper-level pattern stagnates for a few days as
the troughs/lows over the west and east coasts become semi-
stationary, keeping deep ridging over the Central US. The
prominent low pressure system off the New England coast/Canadian
Maritimes will quickly push the ridge axis of the Bermuda well
south of Florida, and the local pressure gradient becomes almost
non-existent. The official forecast calls for offshore flow to
develop Saturday before becoming light Sunday onward, but it`s
very possible Saturday may end up being light/variable was well. A
front associated with the aforementioned low arrives in the Deep
South this weekend, but how far it gets and how the boundary
evolves Monday onward is highly uncertain. Models do agree the
high moisture isn`t going anywhere unless the front reaches
Central Florida, and broad above normal rain chances continue
through the period. Seasonable temperatures will be on the hotter
side inland Saturday and Sunday, then are forecast to return back
to normal for the work week.

&&

.MARINE...
Issued at 221 AM EDT Wed Sep 2 2026

Today-Sunday...Winds and seas remain generally favorable for
boating, but isolated to scattered storms that may become numerous
at times, including during the overnights, will remain a hazard. A
weak inverted trough sliding west across the local Atlantic waters
early this morning and inland by the afternoon will be a focus for
shower and storm development, then additional showers and storms
will form near the coast and inland on the sea breeze in the late
morning to early afternoon before moving inland. Winds will veer
from NE-ESE north of the Cape to SE-SSW to the south along the
trough, settling to ESE-SE tonight. The ridge axis of a very weak
Bermuda high is forecast to drop south Friday, reaching Central
Florida Saturday or so, then departing south of the area early
next week as a front pushes into the Southeast. Flow gradually
shift from S-SE Friday, to S-SW Saturday, and W-SW Sunday. Winds
back to the E-SE afternoons-evening with the sea breeze. Wind
speeds 5-10 kts, increasing to 10-14 kts behind the sea breeze.
Seas 2-3 ft, up to 4 ft well offshore in the Gulf Stream today,
then settling to 1-2 ft this weekend.

&&

.AVIATION...
(12Z TAFs)
Issued at 727 AM EDT Wed Sep 2 2026

Patchy stratus/fog that has developed near KLEE should lift and
diminish by 13-14Z. Otherwise, VFR conditions are forecast
outside of showers/lightning storms with onshore flow. Light and
variable winds are expected to increase from the east-northeast
at 5-10mph after 14Z. Winds will become light and variable into
the late evening. VCTS is forecast at 16Z-17Z with TEMPO groups
for TSRA between 18Z-22Z. The potential exists for isolated strong
storms across ECFL.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  88  76  88  76 /  60  20  50  20
MCO  91  76  92  76 /  70  30  70  20
MLB  89  77  89  77 /  60  20  50  20
VRB  89  75  89  76 /  60  30  50  30
LEE  90  76  91  76 /  70  40  70  30
SFB  90  76  91  76 /  70  20  70  20
ORL  90  76  92  77 /  70  30  70  20
FPR  89  75  89  76 /  60  30  50  30

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
&&

$$

DISCUSSION...Haley
AVIATION...Fehling