645
FXUS62 KMFL 040817
AFDMFL

Area Forecast Discussion
National Weather Service Miami FL
417 AM EDT Sun Oct 4 2026

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

.KEY MESSAGES...
Updated at 406 AM EDT Sun Oct 4 2026

 - A high risk of rip currents is now in effect across the
   Atlantic Coast beaches through this evening.

 - Isolated to scattered showers and thunderstorms will remain
   possible today. The highest chances will remain during the
   afternoon and evening hours around the Gulf coast.

 - High temperatures will reach the low 90s in many areas of South
   Florida, along with Heat Index values in the low-mid 100s.

&&

.SHORT TERM...
(Today through Monday)
Issued at 406 AM EDT Sun Oct 4 2026

Latest ensembles and high-res guidance remain in fair agreement
about the overall synoptic scenario for today and Monday. The mid-
lvl ridging that has been persistent over the area will continue to
erode today as a deep trough/low storm complex develops across
the midwest and SE CONUS. Meanwhile, the sfc ridge axis of the
Atlantic high will push further eastward and move further away
from the NE portions of the peninsula by Monday.

The influence of the ridge should last one more day and keep a
generally E/SE wind regime across Soflo today, with some periods of
coastal gusty conditions possible. Latest satellite water vapor data
still shows some pockets of mid-lvl drier air moving into the area,
although the 00Z MFL sounding data seems fairly saturated through
9km. Latest NBM trended towards a brief drying trend later today,
and keeping low POPs (10-20%) for much of eastern and central SoFlo,
and up to 50-60% for Gulf coast areas.

Latest SPC Mesoscale analyses depicts a generally modest to low
atmospheric instability, which seems to be limited by cooler mid-lvl
lapse rates and steadily increasing cloud cover affecting daytime
heating. Overall CAPE of 1K-1.8K j/kg may support brief daytime
pulse thunderstorms, but probably won`t result in severe/organized
weather, especially with forecast LIs in the -2C to -4C, and PWATs
possibly dropping below 2 inches.

The synoptic scenario will change on Monday as the dominance of the
high pressure ridge to the north of SoFlo will finally break down. A
weakening of the mid-lvl ridge across the SE CONUS will result from
the development of a trough/low complex, which sends an associated
sfc cold front into the northern portions of the peninsula. This
will result in the onset of returning deep moisture across SoFlo
with max POPs back in the 60-70% over interior areas.

Hot conditions will prevail from today onward with afternoon highs
in the low 90s for much of SoFlo, along with heat index values in
the low-mid 100s each day.

&&

.LONG TERM...
(Monday night through Saturday)
Issued at 406 AM EDT Sun Oct 4 2026

Consensus in global solutions keep showing a potential low
developing along a stalled frontal boundary around NE Florida, which
then slowly migrates northward across the W Atlantic during the
first half of the week. Weak southerly flow will combine with the
influence of the low to support tropical moisture advection across
the state. NBM POPs remain in the 70-80% range each day through the
end of the work week. Coverage becomes widespread across SoFlo by
Tuesday, with a generally wet weather pattern prevailing through the
long term.

As the W Atlantic ridge axis pushes further east, pressure gradients
across SoFlo will weaken and bring winds across to a light flow or
even calm at times. This will allow for afternoon sea breeze and
storm outflow boundaries to drive storm development and motion. Main
hazards will include damaging gusts, lightning strikes, and
localized flooding.

High pressure should then re-establish in the wake of the
low/front for the start of the weekend, bringing back a more
typical easterly wind regime, along with decreasing POPs/Wx
coverage.

Temperatures will remain hot each afternoon with highs in the upper
80s to low 90s, along with heat index values in the low-mid 100s.

&&

.AVIATION...
(06Z TAFS)
Issued at 115 AM EDT Sun Oct 4 2026

Brief MVFR periods are still possible at the Atlantic terminals
through around 14Z with passing coastal showers, then VFR should
prevail for the rest of today. APF may experience periods of stronger
restrictions and erratic winds as chances of thunderstorms will
be significantly higher, mainly after 18Z. VFR then prevails and
winds becoming L/V after 02-03Z tonight.

&&

.MARINE...
Issued at 406 AM EDT Sun Oct 4 2026

A moderate to fresh east southeasterly flow will continue across
most of the local waters today. These winds will gradually diminsh
and weaken starting Monday, and they could become south
southwesterly across the Gulf waters during the forecast period.
Scattered showers and thunderstorms will be possible each day across
most of the local waters.

Gulf Stream Hazards: None.

&&

.BEACHES...
Issued at 404 AM EDT Fri Oct 2 2026

A High Risk if Rip Currents remains in effect for all Atlantic
beaches through this evening. Please follow all posted safety
measures at local beaches.

&&

.PRELIMINARY POINT TEMPS/POPS...
Miami            90  78  90  77 /  10  10  40  20
West Kendall     90  77  89  76 /  10  10  40  20
Opa-Locka        90  78  90  77 /  10  10  40  20
Homestead        89  78  89  77 /  10  10  30  20
Fort Lauderdale  89  78  89  76 /  10  10  40  30
N Ft Lauderdale  89  78  89  77 /  10  10  40  30
Pembroke Pines   89  78  89  76 /  10  10  40  20
West Palm Beach  89  77  90  76 /  20  10  50  30
Boca Raton       89  78  89  76 /  10  10  40  30
Naples           90  75  89  75 /  50  40  30  30

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...High Rip Current Risk through this evening for FLZ168-172-173.

AM...None.
GM...None.
&&

$$

SHORT TERM...17
LONG TERM....17
AVIATION...17