394
FXUS62 KMLB 051058
AFDMLB

Area Forecast Discussion
National Weather Service Melbourne FL
658 AM EDT Wed Aug 5 2026

...New AVIATION...

.KEY MESSAGES...
Issued at 154 AM EDT Wed Aug 5 2026

- Winds turn onshore today, shifting the greatest coverage of
  showers and storms over the interior for the middle of the week.
  A few stronger storms will be capable of producing wind gusts to
  40 to 50 mph. There is a 5 to 10% chance of 3 to 4" rainfall
  totals, which could cause minor urban flooding.

- A disturbance passes over Florida on Friday and Saturday. This
  will increase the chance of rain, cause choppy surf, and
  heighten the risk of life-threatening rip currents.

- Seasonably hot and humid conditions continue. Peak heat indices
  from 100 to 105 are expected each afternoon.

&&

.DISCUSSION...
Issued at 154 AM EDT Wed Aug 5 2026

             -----------Synoptic Overview-----------

A pattern change is underway for the Florida Peninsula. The weak
upper low over the Southern Appalachians is weakening and slowly
lifting northward, as was expected. Meanwhile, the Bermuda high
over the W Atlantic is continuing to strengthen, with H5 heights
already rising above normal over Florida this morning. Over the
next 36 hours, the core of the 598 dam H5 anticyclone will become
anchored off the Outer Banks. In tandem, surface high pressure
will retreat northward, its axis passing over Central Florida
today on its way to the I-20 corridor by Thursday afternoon.
Boundary layer flow will quickly shift to the SE today before
backing to the east beginning Thursday. In this regime, total
moisture (PWATs) will decrease slightly, approaching normal for
early August.

An inverted trough was initialized this evening north of the
U.S. Virgin Islands. It is moving quickly westward beneath the
sprawling high to its north. Considerable disagreement still exists
regarding the sharpness of this trough once it reaches Florida by
Friday, with EPS members sharper and GEFS members weaker. Still,
a batch of rich moisture is expected to accompany this feature as
it moves through the area through at least early Saturday.

Cluster analysis of the 04/12Z grand ensemble exhibited strong
agreement in the upper-air pattern late this weekend and early next
week. A mid-latitude polar jet streak flattens the ridge over the W
Atlantic, shunting its axis southward toward Florida as it expands
westward over the Gulf. By Sunday and Monday, H85 temperatures
nudge slightly above normal while total moisture decreases to near
seasonal averages. The ridge is forecast to remain in place through
at least the middle of next week. There remains some hint of a
Saharan Air Layer (SAL) beyond Tuesday, which may lower moisture
values below normal at the tail end of the forecast period.

             -------Sensible Weather & Impacts-------

Today - Thursday...

Lingering showers finally diminished over interior, and mainly dry
conditions are expected early this morning. As southeasterly flow
begins in earnest, a few showers may approach the coast later in
the morning. A diffuse Atlantic sea breeze should march inland
this afternoon, sparking at least scattered showers and storms
(30-50% coast, 50-70% interior). Some of the guidance suggests
that cloud cover will linger over the I-4 corridor today, limiting
the strongest instability to the interior south of Orlando. Any
activity should diminish after sunset, with only low shower
chances overnight, especially on the Treasure Coast.

As winds turn solidly onshore on Thursday, a few showers or storms
may move ashore on the coast in the morning before the focus pushes
inland and toward the west coast late in the afternoon. Overall,
rain chances range from 50-60% at the coast to 60-75% over the
interior.

Should any stronger storms form, they would be capable of producing
the usual summer hazards: frequent lightning, gusty winds up to
around 50 mph, and torrential rainfall of 2-4" in a short period.

High temperatures should reach the upper 80s to low 90s each day,
with peak heat indices near or just above 100.

Friday - Saturday...

Easterly winds increase as the trough pushes near or over Florida to
end the work week. This will bring a surge of additional moisture
into the area, likely sparking bands of showers and storms on
Friday. Coastal showers in the morning should be enhanced by the
wave, then the focus of storms drifts inland by afternoon. Overall,
60-80% coverage is forecast on Friday. While a sharper trough would
pose at least a low risk of excessive rainfall, it is still too
early to determine how organized this feature will be. Statistical
guidance shows only a 5% chance of 2"+ of rainfall between Friday
morning and Saturday night.

The moisture surge slowly lifts northward on Saturday, with some
drying noted in the mid-levels, especially southeast of Orlando
late in the day. Deviated somewhat from NBM rain chances, which
looked too high given the pattern. Went with rain chances just above
climatology, from 40-50% along the coast up to 60-70% elsewhere.

Seasonably hot and muggy conditions persist, with heat indices from
100-105, warmest on Saturday. Surf is still forecast to become
choppy at our beaches by Friday, likely increasing the risk of
life-threatening rip currents.

Sunday - Next Week...

With Central Florida fully influenced by a sprawling area of high
pressure, the daily sea breeze circulation will become the focus for
afternoon and evening showers and storms. Coverage should lessen
each day as we move into next week, courtesy of some drier air
aloft approaching the state from the east. With less storm
coverage, temperatures should turn hotter. Widespread low/mid 90s
are forecast. Seasonably high dew points may allow heat indices to
nudge closer to 105-108 degrees.

&&

.MARINE...
Issued at 154 AM EDT Wed Aug 5 2026

High pressure will move over the local Atlantic waters today
before lifting north of the area on Thursday. Onshore flow
will develop, with a diffuse sea breeze pushing inland each
afternoon. Winds freshen slightly on Friday as a trough passes
over the waters. Briefly poor boating conditions may occur with
this feature, especially in the Gulf Stream. After this disturbance
passes, high pressure is expected to remain in place through early
next week.

SE winds up to 10 kt today, becoming E at 10-15 kt on Thursday. E
winds freshen to 15-18 kt in the Gulf Stream early Friday, before
settling slightly out of the SE by the weekend (10-15 kt). Seas 1-3
ft through Thursday, building to 3-5 ft on Friday. Seas generally
2-4 ft this weekend.

&&

.AVIATION...
(12Z TAFs)
Issued at 658 AM EDT Wed Aug 5 2026

Mainly VFR outside of showers and storms today. May see some
initial showers or a storm push onshore near KSUA toward mid to
late morning. Otherwise, scattered showers and storms are forecast
to develop with the inland moving east coast sea breeze this
afternoon and evening, with greatest coverage focused inland west
of I-95. Tempo IFR/MVFR conditions will occur with any of this
activity. Have PROB30 and TEMPO groups for MVFR TSRA impacts
continuing for all sites, with three hour windows around
18/19Z-21/22Z at the coast, except 16-19Z at KSUA, and 20-23Z for
inland TAF sites, including KMCO. Isolated strong storms will be
possible today. As convection diminishes into the evening, some
areas of light debris cloud rainfall may persist through midnight,
then will see a return of isolated onshore moving showers along
the coast overnight.

Southeast winds around 5 knots this morning become easterly
around 8-10 knots behind the inland moving east coast sea breeze
in the afternoon. Winds then diminish after sunset, becoming 5
knots or less.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  88  76  89  77 /  30  10  50  10
MCO  90  75  91  76 /  50  20  60  10
MLB  88  77  89  78 /  30  20  50  20
VRB  88  77  89  77 /  40  30  60  40
LEE  89  76  90  76 /  50  30  60  10
SFB  90  76  92  77 /  40  20  60  10
ORL  90  76  91  77 /  50  20  60  10
FPR  88  76  89  77 /  50  30  60  40

&&

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

$$

DISCUSSION...Heil
AVIATION...Weitlich