Marine Weather Net

Laguna Madre from Port Mansfield to Baffin Bay Marine Forecast


TONIGHT

SE
WINDS
20 - 25
KNOTS

SATURDAY

SE
WINDS
15 - 20
KNOTS

SATURDAY NIGHT

SE
WINDS
20 - 25
KNOTS

SUNDAY

SE
WINDS
20 - 25
KNOTS

The Marine Weather Forecast In Detail:
GMZ135 Forecast Issued: 322 PM CDT Fri Apr 26 2024

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT
Tonight...Southeast Winds 20 To 25 Knots With Gusts Up To 30 Knots Decreasing To 15 To 20 Knots After Midnight. Rough On The Bay Becoming Choppy After Midnight.
Saturday...Southeast Winds 15 To 20 Knots Increasing To 25 To 30 Knots In The Afternoon. Choppy On The Bay Becoming Very Rough In The Afternoon.
Saturday Night...Southeast Winds 20 To 25 Knots. Gusts To 35 Knots In The Evening. Rough On The Bay.
Sunday...Southeast Winds 20 To 25 Knots With Gusts Up To 30 Knots Decreasing To 15 To 20 Knots In The Afternoon. Rough On The Bay Becoming Choppy In The Afternoon. A Slight Chance Of Showers And Thunderstorms In The Afternoon.
Sunday Night...Southeast Winds 15 To 20 Knots Decreasing To 10 To 15 Knots After Midnight. Choppy On The Bay Becoming A Moderate Chop After Midnight.
Monday...Southeast Winds 10 To 15 Knots. A Moderate Chop On The Bay. A Slight Chance Of Showers And Thunderstorms In The Afternoon.
Monday Night...Southeast Winds 10 To 15 Knots. A Moderate Chop On The Bay. A Slight Chance Of Showers And Thunderstorms.
Tuesday...Southeast Winds 10 To 15 Knots. A Moderate Chop On The Bay. A Slight Chance Of Showers And Thunderstorms.
Tuesday Night...Southeast Winds Around 15 Knots. A Moderate Chop On The Bay.
Wednesday...Southeast Winds Around 15 Knots. A Moderate Chop On The Bay.
Wednesday Night...Southeast Winds Around 15 Knots. A Moderate Chop On The Bay. Winds And Waves Higher In And Near Thunderstorms.
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Area Forecast Discussion
...UPDATED National Weather Service Brownsville TX
639pm CDT Fri April 26 2024

Long Term
(Sunday through next Friday) Issued at 230pm CDT Fri April 26 2024

An upper-level trough over the Central Plains will traverse further east Sunday, allowing for mostly zonal flow aloft over Deep South Texas for the start of the workweek. By mid week, weak upper level ridging looks to build over South Texas, though this ridge will be quickly replaced by the next upper level trough by the end of the period. A series of shortwaves moving through the mid level flow will bring enhanced forcing to the area, increasing potential for some convection to occur. Rain chances remain fairly low through the period (20-30%), however multiple opportunities for showers and thunderstorms are likely to occur.

At the surface, southerly to southeasterly winds look to be persistent through the period, transporting plenty of warm, humid air to the region. High temperatures through the period are expected to remain in the 90s for most of the area, with areas along the coast in the upper 80s. Likewise, low temperatures are expected to remain in the 70s through the period.

The first opportunity for showers and thunderstorms will be Sunday, as a cold front looks to stall to the northwest. Showers and thunderstorms ahead of the cold front could move into northern portions of the CWA, though limited instability and a potent CAP will likely keep the best chances of convection further north.

The next opportunity for showers and thunderstorms looks to be Monday night, when enhanced forcing from a passing shortwave could convection developing along the Sierra Madre Mountains. Some of these storms could make it to Deep South Texas, however a less favorable environment closer to the coast could cause these storms to dissipate before they make it that far. This cycle will basically repeat itself Tuesday and Wednesday as additional shortwaves move through.

The pattern changes slightly Thursday, as a cold front looks to develops over North Texas and rapidly drops south. While recent GFS (Global Forecast System) and ECMWF (European Centre for Medium-Range Weather Forecasts) runs both have the cold front moving through Deep South Texas, they differ on the timing. With this system being nearly a week out, uncertainty in either solution is fairly high, however it is worth mentioning rain chances look to increase near the end of the period with the potential passage of a cold front.

Marine
Issued at 230pm CDT Fri April 26 2024

Tonight through Saturday night...The surface pressure gradient between high pressure extending over the Gulf of Mexico and a series of low pressure areas moving across the Plains will cause fresh to strong southeast winds and moderate to high seas through much of the weekend. I extended small craft advisory conditions through 1am CDT Sunday, when winds across the Laguna Madre may lower below 20 knots, but persistent elevated Gulf seas may require further extensions of the advisory for the Gulf marine zones.

Sunday through next Friday...Weakening pressure gradients will allow wind speeds to decrease on Sunday, although stronger winds over the Laguna Madre may warrant a Small Craft Advisory or Small Craft Exercise Caution headline Sunday afternoon. While the winds over the water look to decrease, seas will be slower to respond. Wave heigheights may warrant Small Craft Advisories into Monday morning for the coastal Gulf waters. Small Craft Exercise Caution headlines may be needed periodically through the remainder of the period, as a series of upper level shortwaves look to enhance pressure gradients along the coast leading to stronger winds and higher seas.

NOAA Brownsville TX Office: Watches - Warnings - Advisories
TX...Wind Advisory until 7pm CDT this evening for TXZ254-255-354-355.

High Rip Current Risk through Sunday morning for TXZ451-454-455.

GM...Small Craft Advisory until 1am CDT Sunday for GMZ130-132-135- 150-155-170-175.