Port Mansfield, TX to the Rio Grande River 20 - 60 NM Marine Forecast
| Today...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. Wave Detail: Southeast 4 Feet At 6 Seconds. |
| Tonight...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet. Wave Detail: Southeast 5 Feet At 7 Seconds. |
| Tuesday...Southeast Winds 10 To 15 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: Southeast 5 Feet At 7 Seconds. |
| Tuesday Night...Southeast Winds Around 15 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Southeast 5 Feet At 7 Seconds. |
| Wednesday...Southeast Winds 10 To 15 Knots. Seas 4 To 5 Feet. Wave Detail: Southeast 5 Feet At 7 Seconds. |
| Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet. Wave Detail: Southeast 4 Feet At 7 Seconds. |
| Thursday...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. |
| Thursday Night...Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. |
| Friday...Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. A Slight Chance Of Showers In The Afternoon. |
| Friday Night...East Winds 15 To 20 Knots, Increasing To 20 To 25 Knots After Midnight, Then Becoming Northeast Early In The Morning. Seas 4 To 6 Feet, Occasionally To 8 Feet, Building To 6 To 8 Feet, Occasionally To 10 Feet After Midnight. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers With A Slight Chance Of Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion ...UPDATED National Weather Service Brownsville TX 636am CDT Monday April 27 2026 Issued at 1047pm CDT Sunday April 26 2026 An upper level ridge over Northern Mexico will support generally hot and dry conditions through the work week. Isolated afternoon convection along a dryline running from the Sierra Madre up through North Texas will remain possible for the next couple days, though the probability of any convection making it to Deep South Texas remains very low (<10%). High CAPE values and ample wind shear could allow for any thunderstorm that does make it to the CWA (County Warning Area) to be strong to severe, however a capping inversion and dry mid levels will likely hinder convection. Extended runs of the HRRR (High-Resolution Rapid Refresh) and RRFS both show convection developing over Mexico Monday afternoon but dissipating before reaching the border. Heat will likely remain the primary hazard this week, with high temperatures forecast to range from the mid 90s to low 100s through Wednesday and the low to mid 90s Thursday and Friday. Heat indices are forecast to generally range from 105 to 110 degrees Monday and Tuesday afternoons, though some isolated pockets of higher heat indices are possible. Global models have been consistently indicating a pattern change next weekend, as an upper level trough moves across the Southwest. This could drive a cold front south, through Deep South Texas early next weekend, bringing increased rain chances and cooler temperatures by the end of the period. Marine Issued at 1047pm CDT Sunday April 26 2026 Generally favorable marine conditions are expected to persist on the Gulf waters through Friday, while elevated winds along the Laguna Madre each afternoon may prompt Small Craft Should Exercise Caution headlines. A cold front looks to move through the area next weekend, likely resulting in elevated winds and seas behind the front. NOAA Brownsville TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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