277
FXUS62 KMFL 280714
AFDMFL

Area Forecast Discussion
National Weather Service Miami FL
314 AM EDT Tue May 28 2024

...New SHORT TERM, LONG TERM, MARINE...

.SHORT TERM...
(Today through Wednesday)
Issued at 310 AM EDT Tue May 28 2024

Shower and thunderstorm chances will increase today as troughing moves
into the eastern US displacing the mid-lvl ridge which had been in place
over our area the last couple days. At the same time a weak cold front
will shift into the vicinity of Northern Florida and then largely stall
north of the area for much of the upcoming week. A warm and moist airmass
will be in place over SFL with highs once again increasing well into the
90s area-wide and peak heat indices into the triple digits. Heat indices
may increase over 105 degrees over portions of the area, with some
potential for some sites over the east coast meeting heat advisory
criteria, however expect convective initiation to be early enough in the
afternoon to limit the duration component of our heat criteria. The
low-lvl mean flow will still have a mean westerly component, making the
east coast sea breeze once again the main forcing mechanism for convection
and also focusing the highest rain chances over the eastern Interior and
east coast metro.  Deep-layer flow will remain weak (albeit increasing
slightly as a shortwave approaches) so don`t expect convection to be
particularly organized, although strong winds from individual cell
microbursts will remain a threat given steep low-lvl lapse rates and
DCAPE in excess of 1000 J/kg. Cooling temperatures aloft (particularly
over Palm Beach county) will result in some hail potential as well,
although not particularly confident in the large hail potential.

The overall synoptic setup will be pretty similar on Wednesday with the
stalled front remaining north of the area, local winds being largely
driven by sea-breeze circulations, and hot temperatures persisting.
Convection will once again be sea-breeze driven although spatial coverage
may be a little more equitable as westerly synoptic flow weakens allowing
for greater inland progression of the sea breeze. Convective coverage and
intensity may be marginally lower than today given the lack of shortwave
forcing and somewhat warmer mid-lvl temperatures, however on the whole
scattered coverage (i.e. 35-50 PoPs) seem reasonable.

&&

.LONG TERM...
(Wednesday night through Monday)
Issued at 310 AM EDT Tue May 28 2024

Longwave troughing will persist over the eastern CONUS through the
long-term period, with the low-lvl flow trending a bit more easterly
Thursday/Friday. This will tend to focus the best convective chances over
the Interior and west coast, with generally scattered coverage expected.
Hot conditions should prevail with the front remaining stalled north of
the area, but highs may drop a couple degrees over the east coast due to
the quicker diurnal sea breeze progression.

Easterly flow will become more established this weekend into early next
week as stronger high pressure builds north of the area, with guidance
now generally coinciding that the previously stalled boundary will
actually (in a surprising turn of events for early June) make it through
the area. Temperatures will cool closer to seasonable normals with
forecast highs in the mid to upper 80s on the east coast and lower 90s
over the west coast and Interior. Thunderstorm chances will be reduced
behind the boundary as more stable air filters in, although some
quick-moving coastal convergence induced showers will be possible.

&&

.AVIATION...
(06Z TAFS)
Issued at 140 AM EDT Tue May 28 2024

VFR conditions will generally prevail at all terminals through
around 15Z, then some sub VFR periods will be possible with
VCSH/TS, especially over the Atlantic sites. Light and variable
winds will shift from SW to SE around 10kt through 18Z. Only
exception will be KAPF where Gulf breezes will again bring
westerly flow after 17Z.

&&

.MARINE...
Issued at 310 AM EDT Tue May 28 2024

Overall light to moderate S-SE flow will continue through the
middle of the week over the Atlantic waters. There may be a brief
period of cautionary winds this afternoon and early evening
across the northern Atlantic waters, but seas will remain low.
The Gulf waters will likely see more westerly flow through the
period, particularly over the near-shore waters in the afternoon
given the onshore progression of the Gulf breeze each afternoon.
Isolated showers and thunderstorms will be possible today with
increasing storm chances Tuesday and through the middle of the
week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Miami            93  79  93  79 /  50  50  50  30
West Kendall     94  75  95  75 /  50  50  40  30
Opa-Locka        94  78  94  77 /  50  50  50  30
Homestead        92  76  93  77 /  40  50  40  30
Fort Lauderdale  92  78  92  79 /  50  50  50  30
N Ft Lauderdale  93  78  93  78 /  50  50  50  30
Pembroke Pines   96  79  96  79 /  50  50  50  30
West Palm Beach  95  75  93  76 /  50  50  40  20
Boca Raton       94  76  93  77 /  50  50  50  30
Naples           92  78  93  77 /  20  10  30  20

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
GM...None.
&&

$$

SHORT TERM/lONG TERM/MARINE...NC
AVIATION...17