Marine Weather Net

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


REST OF TONIGHT

E
WINDS
5 - 10
KNOTS

SUNDAY

SE
WINDS
5 KNOTS

SUNDAY NIGHT

E
WINDS
5 KNOTS

MONDAY

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ170 Forecast Issued: 933 PM CST Sat Nov 16 2019

Rest Of Tonight...East Winds 5 To 10 Knots Becoming Southeast After Midnight. Seas 2 To 4 Feet.
Sunday...Southeast Winds Around 5 Knots. Seas 2 To 3 Feet Subsiding To 2 Feet Or Less In The Afternoon.
Sunday Night...East Winds Around 5 Knots Becoming Northwest After Midnight. Seas 2 Feet Or Less. Slight Chance Of Showers.
Monday...South Winds 5 To 10 Knots. Seas 2 To 4 Feet.
Monday Night...South Winds 5 To 10 Knots. Seas 2 To 4 Feet.
Tuesday...South Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Tuesday Night...South Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet.
Wednesday...South Winds 20 To 25 Knots. Seas 6 To 8 Feet With Occasional Seas Up To 9 Feet.
Wednesday Night...South Winds 20 To 25 Knots. Seas 6 To 8 Feet With Occasional Seas Up To 9 Feet. Slight Chance Of Showers.
Thursday...South Winds 15 To 20 Knots. Seas 6 To 8 Feet With Occasional Seas Up To 9 Feet. Slight Chance Of Showers.
Thursday Night...South Winds 15 To 20 Knots. Seas 6 To 8 Feet With Occasional Seas Up To 9 Feet. Slight Chance Of Showers.
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Synopsis for Baffin Bay to Rio Grande out 60 nm: GMZ100
933 PM CST Sat Nov 16 2019

High pressure and light easterly to southeasterly winds through the weekend will bring favorable marine conditions across adjacent waters of the lower Texas coast. A weak cold front will turn winds north to northeasterly briefly Sunday night into Monday, with little marine impact. As a surface low strengthens mid week, the pressure gradient increases southerly winds across the coastal waters Tuesday night through Wednesday. Hazardous conditions are possible Wednesday.
Area Forecast Discussion
...UPDATED National Weather Service Brownsville TX
630pm CST Sat Nov 16 2019

Short Term - Now through Sunday Night
High pressure heads east through the period with a very weak frontal boundary and northerly wind shift approaching Deep South Texas and the Rio Grande Valley Sunday night. High temperatures today have nudged into the 70s across the valley, with upper 60s to near 70 north. Light and somewhat variable winds overnight shifting southeast may still allow temperatures to dip into the low 50s or upper 40s north and mid to upper 50s across the RGV. High cirrus may be just enough to prevent too many locations from dropping into the 40s. Highs on Sunday reach to a comfortable mid to upper 70s with southeasterly flow. With at least a little cloud cover late Sunday near the weak frontal boundary, low temperatures may only dip into the mid and upper 50s.

Have left patchy fog in the forecast, although models have begun to show slightly drier low levels. Best chance will be across the northern ranchlands and more rural areas of the mid to upper RGV. Any fog will likely be shallow and quickly dissipate Sunday morning.

Long Term - Monday through Saturday
The main event in this portion of the forecast will be the Friday morning through afternoon passage of a cold front through Deep South Texas and the Rio Grande Valley. Isolated showers are possible in association with the frontal passage, with additional isolated convection possible Wednesday night through Thursday night as an increasingly moist onshore flow intensifies. Naturally, well above normal daytime high and overnight low temperatures will occur in advance of the front, with the front serving to bring values to more near normal levels with its passage.

MARINE (Now through Sunday Night): With high pressure in control and heading offshore through Sunday, expect very favorable conditions across the waters of the lower Texas coast for the rest of the weekend. Light northeast winds become southeast through the day on Sunday with a weak frontal boundary bringing light northwesterly winds and little change to seas late Sunday night.

Monday Through Saturday
Adverse marine conditions, featuring strong winds and rough seas with the potential for Small Craft Advisory, are expected Wednesday through Saturday in advance of, and briefly behind, the Friday night passage of a cold front. Outside of this time frame, much more favorable marine conditions are likely courtesy of high pressure.

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