Marine Weather Net

Freeport to Matagorda Ship Channel, TX 20 - 60 NM Marine Forecast


REST OF TONIGHT

E
WINDS
5 - 10
KNOTS

THURSDAY

E
WINDS
10 - 15
KNOTS

THURSDAY NIGHT

E
WINDS
5 - 10
KNOTS

FRIDAY

SW
WINDS
5 KNOTS

The Marine Weather Forecast In Detail:
GMZ370 Forecast Issued: 1028 PM CDT Wed Aug 04 2021

Rest Of Tonight...East Winds 5 To 10 Knots Increasing To 10 To 15 Knots After Midnight. Seas 2 Feet. A Slight Chance Of Showers And Thunderstorms Late In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight.
Thursday...East Winds 10 To 15 Knots Becoming Northeast 5 To 10 Knots In The Afternoon. Seas 2 Feet. A Chance Of Showers And Thunderstorms.
Thursday Night...East Winds 5 To 10 Knots Becoming Southeast After Midnight. Seas 2 Feet. A Slight Chance Of Showers And Thunderstorms In The Late Evening And Overnight.
Friday...Southwest Winds Around 5 Knots Becoming South In The Afternoon. Seas 2 Feet. A Chance Of Showers And Thunderstorms In The Morning, Then A Slight Chance Of Showers And Thunderstorms In The Afternoon.
Friday Night...South Winds 10 To 15 Knots. Seas 2 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight.
Saturday...South Winds 10 To 15 Knots. Seas 2 Feet.
Saturday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Sunday...South Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers And Thunderstorms.
Sunday Night...South Winds 10 To 15 Knots. Seas 3 To 4 Feet.
Monday...South Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers And Thunderstorms.
Monday Night...Southeast Winds 10 To 15 Knots. Seas 3 To 4 Feet.
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Synopsis for High Island to the Matagorda Ship Channel out 60 nautical miles including Galveston and Matagorda Bays - GMZ300
335 PM CDT Wed Aug 4 2021

A stalled front near the coast will continue to kick up showers and thunderstorms through the rest of the work week. Seas are expected to remain 1 to 2 feet outside of convection, but expect locally higher heights and gusty conditions in and around these showers and storms. Onshore winds will resume by the weekend and slowly increase, allowing seas to build to 3 to 4 feet by Sunday.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
639pm CDT Wednesday August 4 2021

.SHORT TERM [Through Thursday Night]... The stalled frontal boundary continues to push slowly further offshore this afternoon, with showers and storms tapering off over the past several hours as this has occurred. That being said, fairly robust moisture remains situated roughly over the southern half of the area (i.e., south of the I-10 corridor), with satellite-derived PW values (Precipitable Water values) ranging from as low as 1.2 in near Crockett to approximately 2.2 in around Matagorda Bay. As the boundary continues its slow departure overnight, HiRes models indicate the development of another round of showers/storms which may stretch into tomorrow morning focused along the coast and near Matagorda Bay. While most activity should remain situated offshore, HREF members are in fairly good agreement in showing some activity making inland over the southwestern zones. As a result, have maintained 20-30% Probability of Precipitation in these locations.

A synoptic pattern shift arrives on Thursday as a longwave trough becomes the dominant feature over the central CONUS. With the base of the trough axis pushing into central TX by tomorrow afternoon and SE TX by the evening, another round of showers and storms is possible during the day though development north of I-10 will be stifled by relatively lower moisture availability (PWs look unlikely to recover to much higher than 1.5-1.6in). Probability of Precipitation will remain highest over the southwestern zones, around 40-50%.

Overall, temperatures remain near to slightly below seasonal normals through tomorrow with highs reaching the upper 80s along the coast to lower 90s inland. Lows remain near normal, in the upper 70s to near 80 close to the coast.

.LONG TERM [Friday Through Wednesday Night]... Friday looks to be the last "wet" day of the week as a trough moves off to the east. Not everyone will get rain, but scattered showers and thunderstorms are anticipated to develop across a large part of the area. Heading into the weekend and into the first half of next week, high pressure (both at the surface and aloft) is expected to strengthen across the area. Lowering precipitable water values (finally under two inches for a majority of the area) in combination with a generally subsident airmass will probably allow for only isolated to widely scattered mainly daytime shower and/or thunderstorm development. The main weather story for a majority of the long term period will likely be a return of the heat and humidity. Daytime high temperatures for inland locations will get back into a mid to upper 90 range while it stays closer to around 90 at the coast. With the dew points persisting in the 70s, heat index values will have some potential to get back into that "close to" Heat Advisory range. 42

Marine
A stalled front near the coast will continue to kick up showers and thunderstorms through the rest of the work week. Seas are expected to remain 1 to 2 feet outside of convection, but expect locally higher heigheights and gusty conditions in and around these showers and storms. Onshore winds will resume by the weekend and will slowly increase, possibly reaching caution levels. This strengthening flow will also bring seas back up to a 3 to 4 foot range. Decreasing rain chances can be expected over the weekend and on into the start of next week. 42.

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...None. GM...None.