598
FXUS64 KBRO 080433
AFDBRO

Area Forecast Discussion
National Weather Service Brownsville TX
1033 PM CST Sun Dec 7 2025

...New DISCUSSION, AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1020 PM CST Sun Dec 7 2025

* Behind a cold front passing this evening, expect for hazardous
  coastal and marine conditions to develop through Monday.

* Dry weather with fluctuating temperatures are expected to
  persist through the upcoming workweek.

* Adverse to hazardous marine conditions could develop once again
  Friday through next weekend following the passage of a second
  cold front.

&&

.DISCUSSION...
Issued at 1020 PM CST Sun Dec 7 2025

A couple of cool/cold fronts will sweep through Deep South Texas
and the Rio Grande Valley through next weekend. This will drive a
mostly rain-free (dry) weather pattern with fluctuating temperatures
through next weekend. The only weather hazards will be focused over
the Laguna Madre and Gulf Waters during this period (see MARINE
SECTION for more details).

We start off the forecast period tonight where the first cool/cold
front is pushing through the Rio Grande Valley. Dry and cold air
advection (CAA) will increase tonight into Monday amid northerly
winds behind the cold fropa. A noticeably cooler and drier night
compared to last night awaits. Overnight low temperatures will fall
to cooler than normal levels for this time of year with values in
the 40s most places (lower 50s along the Mid and Lower RGV).

Monday will feature markedly cooler temperatures compared to today
where high temperatures on Monday are progged to be on the order of
20F degrees cooler than Sunday. Highs most places will struggle to
make it out of the 60s, also cooler than normal for this time of
year. Monday night will be another cold night with overnight lows
mainly in the 40s across Deep South Texas.

Temperatures begin to moderate on Tuesday with a return flow developing
out of the south. Highs on Tuesday will be in the 70s and in the 80s
Wednesday through Friday.

Another cool frontal boundary approaches the region next weekend,
which will lower temperatures once again. Currently, we have high
temps topping out in the 70s Saturday through Monday. Overnight low
temperatures Tuesday night will be in the 50s most places (40s
across the Northern Ranchlands). Wednesday night through next
Sunday night will mainly be in the 50s and 60s.

&&

.AVIATION...
(06Z TAFS)
Issued at 1020 PM CST Sun Dec 7 2025

Through 06z Tuesday...VFR conditions are expected to persist
through the entire 06z TAF cycle.

Following the cool fropa, winds will continue out of the north
with speeds between 5-15 kts. There could be some gusts up to 25
kts from time to time through Monday afternoon, weakening in time.
By Monday evening/night, winds will become light and variable to
calm.

&&

.MARINE...
Issued at 1020 PM CST Sun Dec 7 2025

Conditions have begun to deteriorate and will continue through
tonight in response to a cool/cold fropa. Strong northerly winds
gusting to near gale and seas building to rough are expected
through Monday morning. A Small Craft Advisory remains in place
through 6PM CST Monday. Monday night, favorable conditions return
and will persist through the week with low to moderate winds and
seas. Beginning on Friday, conditions will potentially deteriorate
once again in response to another cold front that will bring
elevated wind and seas through next weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE             85  53  67  50 /   0   0   0   0
HARLINGEN               86  48  67  45 /   0   0   0   0
MCALLEN                 88  51  70  48 /   0   0   0   0
RIO GRANDE CITY         86  48  70  42 /   0   0   0   0
SOUTH PADRE ISLAND      77  60  65  60 /   0   0   0   0
BAYVIEW/PORT ISABEL     83  53  66  51 /   0   0   0   0

&&

.BRO WATCHES/WARNINGS/ADVISORIES...
TX...High Rip Current Risk through Monday afternoon for TXZ451-454-
     455.

GM...Small Craft Advisory until 6 PM CST Monday for GMZ130-132-135-
     150-155-170-175.

&&

$$

SHORT TERM...23-Evbuoma
LONG TERM....23-Evbuoma
AVIATION...23-Evbuoma