Marine Weather Net

Laguna Madre from the Port of Brownsville to the Arroyo Colorado Marine Forecast


TODAY

S
WINDS
10 - 15
KNOTS

TONIGHT

S
WINDS
10 - 15
KNOTS

SUNDAY

N
WINDS
15 - 20
KNOTS

SUNDAY NIGHT

NE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ130 Forecast Issued: 258 AM CST Sat Feb 15 2025

DENSE FOG ADVISORY IN EFFECT UNTIL NOON CST TODAY ...SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL 10 AM CST THIS MORNING... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CST THIS MORNING THROUGH THIS AFTERNOON...
Today...South Winds 10 To 15 Knots, Increasing To 15 To 20 Knots Early This Morning, Then Increasing To 20 To 25 Knots Late This Morning Through Afternoon. A Moderate Chop On The Bay, Increasing To Choppy Bay Waters Early This Morning, Then Increasing To Rough Bay Waters Late This Morning Through Afternoon. Widespread Dense Fog This Morning With Visibility 1 Nm Or Less.
Tonight...South Winds 10 To 15 Knots, Becoming Northwest Around 5 Knots In The Late Evening And Early Morning, Then Becoming North 10 To 15 Knots Early In The Morning. A Moderate Chop On The Bay.
Sunday...North Winds 15 To 20 Knots. Choppy Bay Waters.
Sunday Night...Northeast Winds 10 To 15 Knots, Diminishing To 5 To 10 Knots After Midnight. A Moderate Chop On The Bay, Diminishing To A Light Chop On The Bay After Midnight.
Monday...East Winds 5 To 10 Knots, Becoming Southeast 10 To 15 Knots In The Afternoon. A Moderate Chop On The Bay.
Monday Night...Southeast Winds 10 To 15 Knots. A Moderate Chop On The Bay.
Tuesday...Southeast Winds 10 To 15 Knots. A Moderate Chop On The Bay.
Tuesday Night...Southeast Winds Around 10 Knots, Becoming East After Midnight, Then Becoming North 20 To 25 Knots Early In The Morning. A Light Chop On The Bay, Increasing To A Moderate Chop On The Bay After Midnight, Then Increasing To Rough Bay Waters Early In The Morning. A Slight Chance Of Showers After Midnight.
Wednesday...North Winds 20 To 25 Knots. Rough Bay Waters. A Slight Chance Of Showers In The Morning.
Wednesday Night...North Winds 15 To 20 Knots. Choppy Bay Waters.
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Area Forecast Discussion
...UPDATED National Weather Service Brownsville TX
500am CST Sat Feb 15 2025

Long Term
(Sunday night through Friday) Issued at 254am CST Sat Feb 15 2025

Chilly temperatures Sunday night will give way gradually warmer temperatures Monday and Tuesday as southeasterly return flow sets up across the region. High temperatures Monday look to return to the low to mid 70s, with highs on Tuesday climbing to the mid to upper 80s. Another upper-level trough traversing the Central Plains will drive a cold front south through the CWA (County Warning Area) Tuesday night. Low temperatures are expected to fall to the upper 30s to mid 40s behind the front Tuesday night. High temperatures Wednesday look to remain in the 50s. Northerly winds will support further cooling, with low temperatures dropping to the upper 20s across the Northern Ranchlands and low to mid 30s across the Rio Grande Valley. There is of course some uncertainty in the temperature forecast for Wednesday night, with recent model runs trending cooler. NBM probabilities for freezing temperatures Wednesday night/Thursday morning range from 70-80% across the northern counties and around 40-50% across the southern counties. Freeze Watch/Warnings will likely be needed for the northern counties Wednesday night, and may be needed across the whole CWA. Cold Weather Advisories will also likely be needed across the CWA Wednesday night and Thursday morning.

Southeastern portions of the CWA could see some low rain chances (20-30%) as the front passes. Drier conditions look to persist behind the front, keeping the potential for any frozen/freezing precipitation near-zero.

Marine
Issued at 254am CST Sat Feb 15 2025

Today through Sunday...Buoy 42020 reported south winds around 8 knots gusting to around 10 knots with seas slightly under 5 feet with a period of 8 seconds at 1:50 CST/7:50 UTC. A Small Craft Advisory will be in effect today for both the Laguna Madre and the Gulf of America waters from 0 to 60 nautical miles offshore due to an enhanced pressure gradient in advance of a cold front. Marine conditions will improve slightly tonight as the front begins to ease offshore, but Small Craft Should Exercise Caution may still be needed. A return to Small Craft Advisory conditions will occur on Sunday along the Lower Texas Coast as the front finally moves well offshore.

Sunday night through Friday...Adverse marine conditions could linger into Sunday night as conditions look to improve early Monday morning. Generally favorable conditions look to remain through mid-week as light to moderate southeasterly winds support slight to moderate seas. Winds look to increase behind a cold front Tuesday night, likely remaining just below Gale Force through the day Wednesday, building high seas along the Lower Texas Coast. Winds look to improve Wednesday night with seas gradually diminishing through the day Thursday. Small Craft Advisories will likely be needed Wednesday and Thursday. Generally favorable conditions look to continue through the remainder of the period, though winds and seas on the offshore Gulf waters could briefly require Small Craft Should Exercise Caution headlines.

NOAA Brownsville TX Office: Watches - Warnings - Advisories
TX...Wind Advisory from 10am this morning to 3pm CST this afternoon for TXZ254-255-354-355.

High Rip Current Risk through this afternoon for TXZ451-454-455.

GM...Dense Fog Advisory until noon CST today for GMZ130-132-135-150- 155.

Small Craft Advisory from 10am this morning to 4pm CST this afternoon for GMZ130-132-135.

Small Craft Advisory until 6pm CST this evening for GMZ150-155- 170-175.