174
FXUS62 KMFL 011709
AFDMFL

Area Forecast Discussion
National Weather Service Miami FL
1209 PM EST Mon Dec 1 2025

...New UPDATE, AVIATION, MARINE, BEACHES...

.KEY MESSAGES...
Updated at 1201 PM EST Mon Dec 1 2025

  - A high rip current risk continues through Tuesday for the
    Atlantic beaches.

  - Scattered showers and isolated thunderstorms through Tuesday
    evening before drier conditions return for mid week.

  - Areas of fog possible tonight over inland portions of South
    FL.

&&

.UPDATE...
Issued at 1201 PM EST Mon Dec 1 2025

17z Mesoanalysis indicates the continued presence of a convergent
boundary (coastal convergence) across southern Palm Beach and
northern Broward counties, which has resulted in pockets of moderate
to heavy rainfall over the last several hours. Pockets of 1-2 inches
of rainfall have fallen thus far across southern Palm Beach County.
The frictional convergence of the coastline and breezy easterly flow
to the south of the boundary has resulted in a continuation of ample
surface moisture feeding new shower development as activity
gradually pivots to the south. Recent ACARS data from KMIA and KFLL
depict ample dry air in most of the vertical column with the
exception of the saturated lowest level of the boundary layer. Aside
from a few rumbles of thunder, mainly offshore or along the
immediate coast, convection will remain shallow in nature over the
next couple of hours. Mesoscale models like the WRF, HRRR, and RRFS
have had a hard time with the current pattern, often under doing
the spatial and temporal extent of convection. Have blended the
NAMnest, SREF, and NBM to get a better representation of how rain
chances could play out today. Once the current convergent boundary
along the east coast dissipates in the next couple of hours, the
highest chance of shower activity shifts to the Gulf coast where
there may be enough low level moisture to get some afternoon/early
evening shower development along the Gulf breeze.

Only other change made to the forecast was the inclusion of dense
fog once again tonight between 06z-13z as light winds, clear skies,
and ample low level moisture will once again support the potential
for patches/areas of dense fog, mainly across the Lake Okeechobee
region and inland southwestern Florida.

&&

.SHORT TERM...
(Today through Tuesday)
Issued at 105 AM EST Mon Dec 1 2025

Latest probabilistic guidance shows an increasing likelihood for
patchy to areas of dense fog, especially over inland portions of
South FL. Given the clearing skies, light winds, and precip
yesterday, the increase in probs seems reasonable. Increased the
coverage of patchy fog to include much of South FL outside of the
immediate metro, and included areas of fog over inland portions of
SW FL. Will monitor observations and area web cams closely this
morning to see if any headlines will be needed.

Early morning analysis shows a frontal boundary across northern FL
with a couple of weak lows along the frontal boundary in the
northern Gulf. Locally, moderate easterly flow will continue again
today, with the latest HREF showing PWAT values continuing to slowly
increase today with values of 1.6-1.8 inches by late in the day.
Most of the hi-res guidance continues to struggle with precip for
today, so going with more of a persistence forecast today with
scattered showers throughout the day. While chances will remain
for the entire east coast metro, the best signals for persistent
coastal convergence showers will be over Palm Beach and northern
Broward counties. QPF is another struggle today, but wouldn`t be
surprised to see pockets of 0.5-1 inch amounts, while the vast
majority of the area will be a quarter inch or less. High temps
this afternoon will range from the low to middle 80s.

As the complex system shifts to the SE US late tonight into early
Tuesday morning, our low level flow will become SSE tonight and
eventually SSW during the day on Tuesday. Some widely scattered
coastal showers are possible overnight into the early morning hours,
with mild lows ranging from the upper 60s around the lake to lower
70s across the east coast metro.

With the SSW flow in place on Tuesday, the humidity really ramps up
with dewpoints surging into the low to middle 70s and PWAT values
around 2 inches. As the frontal boundary starts to approach our area
from the NW, plenty of instability will be in place for showers and
occasional thunderstorms to develop during the afternoon and early
evening hours. High temps Tuesday afternoon will be in the mid to
upper 80s.

&&

.LONG TERM...
(Tuesday night through Sunday)
Issued at 1205 AM EST Mon Dec 1 2025

The cold front will cross the area on Wednesday before settling
south of the area across the FL Straits. Little moisture will be
left by the time the front gets here, so rainfall chances will be
fairly low. The front will however bring some slightly cooler and
drier air to the region for the remainder of the work-week, with
temperatures returning to near normal. As the low level flow turns
southerly next weekend, moisture begins to increase the slight
chances of rain will return to the forecast. Temps next weekend will
also return to several degrees above normal.

&&

.AVIATION...
(18Z TAFS)
Issued at 1201 PM EST Mon Dec 1 2025

Ongoing SHRA will continue across northeastern portions of SFL
over the next several hours which could result in reduced
visibilities and cigs at KFXE/KPBI through 20z. Easterly winds of
8-10 kts will continue at east coast terminals with a mid
afternoon westerly Gulf breeze at APF. Patchy dense fog is
possible once again tonight into early Tuesday, mainly across
inland areas.

&&

.MARINE...
Issued at 1201 PM EST Mon Dec 1 2025

Breezy easterly winds expected across the local waters today
before turning southerly on Tuesday. A brief period of hazardous
winds is possible across the northern Atlantic waters Tuesday
into Tuesday night ahead of an approaching cold front. Seas
generally 1-2 ft in the Gulf and 2-4 ft in the Atlantic through
Tuesday.

&&

.BEACHES...
Issued at 1201 PM EST Mon Dec 1 2025

Moderate easterly flow today will result in a high risk of rip
currents for the Atlantic beaches. The high risk will remain through
Tuesday before conditions improve mid week.

&&

.PRELIMINARY POINT TEMPS/POPS...
Miami            73  84  69  82 /  10  20  10   0
West Kendall     70  85  66  84 /   0  20  10   0
Opa-Locka        72  86  68  84 /  10  20  10   0
Homestead        72  84  68  83 /   0  10  10   0
Fort Lauderdale  72  84  68  81 /  10  20  10   0
N Ft Lauderdale  72  85  69  82 /  10  20  10   0
Pembroke Pines   72  86  68  84 /  10  20  10   0
West Palm Beach  72  86  67  82 /  20  30  10   0
Boca Raton       72  86  67  82 /  20  30  10   0
Naples           69  82  67  79 /  10  20  10   0

&&

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

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

$$

SHORT TERM...CMF
LONG TERM....CMF
AVIATION...Hadi