Port Mansfield, TX to the Rio Grande River 20 - 60 NM Marine Forecast
| Tonight...Northeast Winds 5 To 10 Knots, Becoming East Late This Evening, Then Becoming South After Midnight, Becoming Northwest Early This Morning. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds And North 1 Foot At 4 Seconds. A Chance Of Showers And Thunderstorms. |
| Friday...North Winds Around 10 Knots, Becoming Northeast In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds And Northeast 2 Feet At 5 Seconds. A Chance Of Showers And Thunderstorms Early In The Morning. A Slight Chance Of Thunderstorms Early In The Afternoon. A Slight Chance Of Showers In The Afternoon. |
| Friday Night...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 2 Feet At 4 Seconds And Southeast 1 Foot At 5 Seconds. A Slight Chance Of Showers After Midnight. |
| Saturday...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 1 Foot At 5 Seconds And Northeast 1 Foot At 4 Seconds. |
| Saturday Night...East Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: Northeast 2 Feet At 4 Seconds And Southeast 1 Foot At 5 Seconds. A Slight Chance Of Showers After Midnight. |
| Sunday...Northeast Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 4 Seconds. A Slight Chance Of Showers. |
| Sunday Night...East Winds Around 10 Knots. Seas 2 To 3 Feet. A Slight Chance Of Showers. |
| Monday...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Chance Of Showers. |
| Monday Night...East Winds Around 10 Knots. Seas 2 To 3 Feet. A Slight Chance Of Thunderstorms. A Chance Of Showers. |
| Tuesday...Northeast Winds Around 10 Knots. Seas 2 To 3 Feet. A Slight Chance Of Thunderstorms. A Chance Of Showers. |
| Tuesday Night...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Chance Of Showers Until Early Morning, Then A Slight Chance Of Showers Early In The Morning. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service Brownsville TX 1234pm CDT Thu September 25 2025 Issued at 1206pm CDT Thu September 25 2025 We are watching a cold front, whose leading edge is currently located in the lower Valley, continue to linger through this evening before finally moving south out of the area overnight/early Friday morning. Along the front will be the main focus for any showers and thunderstorms this afternoon/evening. Due to the speed of the front moving through, rain chances have decreased, especially across the mid to upper Valley and the Ranchlands. CAMs still depict the development of isolated showers and thunderstorms this afternoon, primarily in the mid to lower Valley. While precipitation chances and totals have trended downward we could still see isolated pockets of heavy rain leading to nuisance flooding on roadways and low lying areas. Rain chances will continue to decrease after sunset. If the front pushes through earlier, rain chances will end earlier as well. Overnight tonight, patchy fog may develop, especially across the Ranchlands. Friday, drier air moves in with generally rain free conditions across much of the CWA (County Warning Area) through Saturday, though portions of the lower Valley could still some isolated showers through midday Friday. On Sunday a weak coastal trough develops with rain chances increasing slightly (15-20%), mainly right along the coast. Headed into the work week, a shortwave moving over the region will keep rain chances in the forecast, primarily along the seabreeze, through the remainder of the forecast period. Near normal temperatures will continue through the middle of next week with highs in the low to mid 90s and overnight lows in the mid 60s to low 70s. Marine Issued at 1206pm CDT Thu September 25 2025 Generally favorable conditions are expected with mostly light to moderate winds and seas of 1 to 3 feet. Will continue to see increased chances for showers and thunderstorms, especially on the southern waters, through early Friday. Winds and seas may be elevated near any showers or thunderstorms and waterspouts will also be possible. NOAA Brownsville TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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