Baffin Bay to Port Mansfield, TX 20 - 60 NM Marine Forecast
| Today...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet. Wave Detail: Southeast 4 Feet At 6 Seconds. |
| Tonight...Southeast Winds 5 To 10 Knots. Seas 3 To 4 Feet. Wave Detail: Southeast 4 Feet At 6 Seconds. |
| Monday...East Winds 5 To 10 Knots. Seas 3 To 4 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. |
| Monday Night...East Winds 5 To 10 Knots. Seas 2 To 4 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. |
| Tuesday...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 3 Feet At 6 Seconds. |
| Tuesday Night...East Winds 5 To 10 Knots, Becoming Southeast Early In The Morning. Seas 2 To 3 Feet. Wave Detail: East 3 Feet At 6 Seconds. |
| Wednesday...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. |
| Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers After Midnight. |
| Thursday...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Chance Of Showers. A Slight Chance Of Thunderstorms In The Afternoon. |
| Thursday Night...Southeast Winds 15 To 20 Knots. Seas 4 To 5 Feet, Building To 5 To 7 Feet, Occasionally To 9 Feet After Midnight. A Chance Of Showers. A Slight Chance Of Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms. |
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Area Forecast Discussion National Weather Service Brownsville TX 214pm CDT Sunday Mar 23 2025 ...New SHORT TERM, LONG TER Marine .SHORT TERM... (Tonight through Monday night) Issued at 213pm CDT Sunday Mar 23 2025 A large 500mb trough works east across the CONUS, maintaining mostly zonal flow across Deep South Texas, turning a little northwesterly Monday night as the ridge sets up across the Desert SW. A weak frontal boundary works south towards the ranchlands tonight into Monday before stalling and falling apart. Breezy southeasterly winds diminish this evening and eventually turn easterly into Monday, generally remaining light. Expect above normal temperatures through Monday. A few CAMs are developing thunderstorms across the Sierra Madre Monday afternoon into Monday evening, bringing them west before dissipating. Have bumped POPs near 10 percent, but continue low confidence in anything crossing the border into Zapata or Starr counties at this time. Still, it may create a good show across the area with distant lightning. Long Term (Tuesday through next Sunday) Issued at 213pm CDT Sunday Mar 23 2025 The main focus in the long term will be the increase in rain chances Wednesday into Friday. A mid-level trough west of Baja of California Tuesday night will continue to move eastward into northern Mexico by Thursday. An embedded strong short wave ahead of a 500mb through will approach Deep South Texas Wednesday into Wednesday night. The combination of the the approaching 500mb short wave, increasing PWATs (Precipitable Waters) (1.4 to 1.8 inches) and a lingering frontal boundary will support increasing rain chances Wednesday, especially across the Rio Grande Plains. There is a low to medium chance (20 to 50 percent) of showers and thunderstorms along the river into Zapata and Starr Counties. The chance of showers and thunderstorms will then spread eastward Wednesday night as the mid to upper level disturbance moves over the area. The combination of the main 500mb trough moving over the region and the stalled front in the vicinity on Thursday into Thursday night will bring the best chances for the CWA. WPC has all of Deep South Texas in a Marginal risk of excessive rainfall in the day 5 outlook, Thursday and Thursday night. Rain chances end from west to east on Friday as the mid to upper level trough axis pushes east- northeast of the areas and a warm front advances northward. High temperatures Tuesday are expected to range from the 70s at the beaches, the 80s across much of the area to the lower 90s across the Rio Grande Plains and the Upper Valley. High temperatures will drop into the 80s, except for the 70s at the beaches, across much of the area on Wednesday as rain chances and cloud cover increases. Highs are expected to remain in the 70s to lower 80s due to abundant cloud cover and high rain chances. High temperatures gradually warm through the remainder of the period. Overnight lows will be mild, falling into the 60s each night, except for the 70s in a few locations. Marine Issued at 213pm CDT Sunday Mar 23 2025 Now through Monday Night...Low pressure into the Plains and high pressure across the eastern Gulf will continue an enhanced pressure gradient into this evening, before weakening into Monday. Expect breezy southeasterly winds along the coast this afternoon, with seas gradually building to 3 to 5 feet, before improving through Monday night. Small craft should exercise caution on the bay. Tuesday through Saturday...Favorable conditions are expected through midweek with light to moderate winds and low to moderate seas. Adverse conditions will gradually develop Wednesday night and continue through the remainder of the period as pressure gradient strengthens. Elevated winds and seas will lead to Small Craft Exercise Caution conditions with Small Craft Advisories possible during this time. NOAA Brownsville TX Office: Watches - Warnings - Advisories TX...None. GM...None. |
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