Marine Weather Net

Freeport to Matagorda Ship Channel, TX Marine Forecast


REST OF TODAY

N
WINDS
10 - 15
KNOTS

TONIGHT

NE
WINDS
10 - 15
KNOTS

THURSDAY

E
WINDS
10 - 15
KNOTS

THURSDAY NIGHT

S
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ350 Forecast Issued: 328 PM CST Wed Nov 25 2020

Rest Of Today...North Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers And Isolated Thunderstorms Early In The Afternoon.
Tonight...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Thursday...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Slight Chance Of Showers In The Late Morning And Early Afternoon. Isolated Thunderstorms In The Late Morning And Afternoon. A Chance Of Showers Late In The Afternoon.
Thursday Night...South Winds Around 10 Knots. Seas 2 To 4 Feet. A Chance Of Showers And Isolated Thunderstorms.
Friday...South Winds 5 To 10 Knots. Seas 2 To 4 Feet. A Chance Of Showers And Thunderstorms In The Morning, Then Showers And Thunderstorms Likely In The Afternoon.
Friday Night...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms In The Evening, Then Showers And Thunderstorms Likely After Midnight.
Saturday...Northeast Winds 10 To 15 Knots Becoming East 15 To 20 Knots In The Afternoon. Seas 2 To 4 Feet Building To 4 To 6 Feet With Occasional Seas Up To 7 Feet In The Afternoon. Showers And Thunderstorms.
Saturday Night...East Winds 15 To 20 Knots Becoming Northwest 20 To 25 Knots After Midnight. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet Subsiding To 3 To 4 Feet After Midnight. Showers And Thunderstorms Until Early Morning, Then A Slight Chance Of Showers And Thunderstorms Late.
Sunday...Northwest Winds 20 To 25 Knots With Gale Force Gusts. Seas 3 To 4 Feet. A Slight Chance Of Showers And Thunderstorms In The Morning.
Sunday Night...North Winds 20 To 25 Knots With Gale Force Gusts. Seas 2 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
328 PM CST Wed Nov 25 2020

Northeasterly flow around 10kts through the night as the cold front continues to move out of the area. An onshore flow returns Thursday midday and strengthens Thursday night as high pressure moves off to the east. East to northeast winds at the end of the week become northwest to north Saturday night through Sunday morning after the passage of the next cold front. A significant increase in offshore winds and much higher seas can be expected in the wake of this much stronger front. Gale force gusts will be possible offshore Sunday night through Monday morning.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
328pm CST Wednesday Nov 25 2020

.SHORT TERM [Through Thursday Night]... Northerly flow in the wake of a cold front will prevail for the rest of the evening as the system moves east across the GOM. Skies will progressively clear through the evening and most of the CWA will see clear skies tonight allowing the air to cool to the mid 40s in the northern counties and around 60 along the coast. Early tomorrow morning, winds will shift more easterly and skies get cloudier from the south as a warm front begins to move inland advecting in the warmer moist gulf air. By Thursday night, expect rain chances will return as moisture continues to increase across the area. 35

Long Term - Friday Through Wednesday
By Friday morning rain will be ongoing across portions of the area with a low-level convergence zone expected to be located across central areas and a very moist airmass in place as well. Precipitable water values will be above normal areawide, and will likely be approaching 2 inches near the coast. A good heavy rainfall setup exists near this quasi-stationary boundary on Friday and continuing into Friday night. It is possible the cooler airmass across northern areas will push south late on Friday with the heavy rainfall threat overnight pushing southward to the coast as well. Isolated strong to severe storms are possible on Friday, with a moist and unstable atmosphere in place. The main threats with the stronger storms will be hail and strong wind gusts. On Saturday, elevated instability will be in place as a surface low moves northeast along the Texas coast, which will trigger additional showers and storms. The main mid/upper level low will approach and move across Saturday night and Sunday morning, which will allow the stronger cold front to push across the area from west to east. Event total rainfall looks to average 2 to 5 inches across the area with isolated slightly higher totals possible. Given that we have been very dry and that 6 hour flash flood guidance is around 5 inches, most of the area should be able to absorb this rainfall. Urban areas could see some street flooding, especially on Friday afternoon and night when the higher rainfall rates would be possible.

In the wake of the cold front, much cooler temperatures are expected by Monday morning and a light freeze is possible across the northern half of the area Tuesday morning with light winds and clear skies in place. The below normal temperatures will persist for much of next week. 33

Marine
The cool front that passed through the waters today will become stationary in the gulf waters just off the outer coastal forecast area. That will move back through the waters tomorrow afternoon, bringing in another wave of showers and a few thunderstorms. With the boundary layer being weak, not much in the forecast for active weather other than the showers and winds shifting southerly tomorrow afternoon. Showers and thunderstorms will persist through the weekend until Sunday morning when another cold front pushes through the waters. In the wake of the Sunday morning cold front, advisory level winds will move in from the southwest as the low pressure moves northeast. Gusts could reach gale force and could be frequent enough for a Gale Warning. The high winds on Sunday will build seas 3-5ft in the coastal waters and 5-7ft in the outer waters with some peaks around 9ft over Sunday night. Tuesday, winds calm to around 10kts and seas subside to the 3-4ft range. Midweek, winds will shift southerly to southeasterly as we prepare for another cold front late next week. 35

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