Marine Weather Net

Port Mansfield, TX to the Rio Grande River 20 - 60 NM Marine Forecast


TODAY

S
WINDS
5 - 10
KNOTS

TONIGHT

SE
WINDS
5 - 10
KNOTS

SUNDAY

S
WINDS
5 - 10
KNOTS

SUNDAY NIGHT

SE
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ170 Forecast Issued: 307 AM CDT Sat Jul 20 2024

Today...South Winds 5 To 10 Knots, Becoming Southeast This Afternoon. Seas 1 To 2 Feet. Wave Detail: Southeast 1 Foot At 4 Seconds. A Slight Chance Of Showers And Thunderstorms This Afternoon.
Tonight...Southeast Winds 5 To 10 Knots, Becoming South After Midnight. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 3 Seconds And Southeast 1 Foot At 6 Seconds. A Slight Chance Of Showers And Thunderstorms Early In The Morning.
Sunday...South Winds 5 To 10 Knots, Becoming Southeast Late In The Afternoon. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 4 Seconds. A Chance Of Thunderstorms.
Sunday Night...Southeast Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. A Chance Of Showers And Thunderstorms.
Monday...Southeast Winds Around 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. A Chance Of Showers And Thunderstorms Until Late Afternoon, Then A Slight Chance Of Showers And Thunderstorms Late In The Afternoon.
Monday Night...Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. A Slight Chance Of Showers And Thunderstorms Early In The Evening. A Chance Of Showers With A Slight Chance Of Thunderstorms After Midnight.
Tuesday...Southeast Winds Around 10 Knots. Seas 2 To 3 Feet. A Chance Of Thunderstorms.
Tuesday Night...Southeast Winds Around 10 Knots, Becoming South Early In The Morning. Seas 2 To 4 Feet. A Chance Of Showers And Thunderstorms Early In The Evening. A Slight Chance Of Showers And Thunderstorms Late In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight.
Wednesday...Southeast Winds Around 10 Knots. Seas 3 To 4 Feet. A Chance Of Thunderstorms. Showers Likely Until Late Afternoon, Then A Chance Of Showers Late In The Afternoon.
Wednesday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 5 Feet. A Chance Of Thunderstorms In The Evening. A Chance Of Showers. A Slight Chance Of Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms.
SHARE THIS PAGE:           
Area Forecast Discussion
...UPDATED National Weather Service Brownsville TX
621am CDT Sat July 20 2024

Long Term
(Sunday night through Friday) Issued at 317am CDT Sat July 20 2024

A mid to upper level ridge will remain centered over the Great Basin through much of the period as a large scale 500mb trough over the central CONUS deepens and sinks south through Texas into mid to late week. A series of mid-level shortwaves will result in isolated to scattered showers and thunderstorms across the area through the period. The Storm Prediction Center (SPC) 3 Day Outlook outlines a general outlook for thunderstorms for Deep South Texas on Monday. The best rain chances will be Tuesday through Friday as deeper moisture (PWATs (Precipitable Waters) 2.2 to 2.5 inches) arrives and lingers across the area. As elevated precipitable water (PWAT) values increase over the region, heavier rainfall will be possible and the Weather Prediction Center (WPC) 5 Day Excessive Rainfall Outlook includes our area within a Marginal risk (>5 percent) for flash flooding on Tuesday and Wednesday.

Temperatures are expected to be near to slightly above normal, in the 90s to near the triple digits for highs on Monday. High temperatures will decrease a few degrees on Tuesday and continue through the rest of the week due to the increase in rain chances and cloud cover, but will remain in the 90s. Heat indices will range from 103 to 108 degrees Monday and Tuesday afternoon, but will drop a bit mid to late week as rain chances increase. Overnight lows are expected to fall into the mid to upper 70s inland, around 80 at the beaches.

Marine
Issued at 317am CDT Sat July 20 2024

Today through Sunday...Light to moderate southeasterly winds and low to moderate seas are expected to persist through Sunday due to high pressure over the Northern Gulf of Mexico. Isolated showers and thunderstorms are possible, which could generate locally enhanced winds and seas.

Sunday night through Thursday...Light to moderate southeast to south winds and low to moderate seas will prevail. Periodic isolated to scattered showers and thunderstorms will be possible through the period. The best rain chances are expected Tuesday through Thursday.

NOAA Brownsville TX Office: Watches - Warnings - Advisories
TX...None. GM...None.