Marine Weather Net

Freeport to Matagorda Ship Channel, TX Marine Forecast


15 - 20


15 - 25


15 - 20


10 - 15

The Marine Weather Forecast In Detail:
GMZ350 Forecast Issued: 950 AM CST Thu Nov 14 2019

Rest Of Today...Northeast Winds 15 To 20 Knots Becoming 15 To 25 Knots In The Afternoon. Seas 3 To 5 Feet. Rain Early In The Morning, Then A Chance Of Rain Late In The Afternoon.
Tonight...North Winds 15 To 25 Knots Becoming 15 To 20 Knots After Midnight. Seas 3 To 5 Feet. A Slight Chance Of Rain In The Evening.
Friday...North Winds 15 To 20 Knots Decreasing To 10 To 15 Knots In The Afternoon. Seas 2 To 4 Feet.
Friday Night...Northeast Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Saturday...Northeast Winds 5 To 10 Knots. Seas 1 To 2 Feet.
Saturday Night...East Winds 5 To 10 Knots. Seas 1 To 2 Feet.
Sunday...East Winds Around 5 Knots. Seas 1 To 2 Feet. A Slight Chance Of Showers Late In The Afternoon.
Sunday Night...North Winds 10 To 15 Knots Becoming Northwest 15 To 20 Knots After Midnight. Seas 1 To 2 Feet. A Slight Chance Of Showers.
Monday...North Winds 10 To 15 Knots Becoming Northwest 5 To 10 Knots In The Afternoon. Seas 1 To 2 Feet.
Monday Night...West Winds 5 To 10 Knots. Seas 1 To 2 Feet.
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Synopsis for High Island to the Matagorda Ship Channel out 60 nautical miles including Galveston and Matagorda Bays - GMZ300
950 AM CST Thu Nov 14 2019

Increasing east and northeast winds this morning in association with a coastal trof situated off the coast. A Small Craft Advisory is now in effect for the Gulf water through at least 6 PM CST today. Showers and isolated thunderstorms can be expected today as the next storm system moves in from the west. Winds will gradually back to the north later today as the coastal trof moves to the east southeast. Moderate north winds will perish overnight. Winds and seas will gradually diminish going into the weekend. Another front is expected Sunday night or Monday.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
1039am CST Thu Nov 14 2019

Forecast continues on track; no significant changes were made to this update.

Chances of rain will continue throughout the day, as a low pressure continues to move eastward from the west and across the local area. Thereafter, cold front moving across central Texas will move southward and across the region this afternoon. In the wake of the front, a colder and drier air mass will filter in, decreasing the chances of rain and gradually clearing skies this evening/tonight. As winds decrease overnight, the combination of clear skies and residual ground moisture could result in areas of patchy fog developing along the northern portions of SE Texas. 24

Short Term (Today through Friday)... Mid/upper low currently centered just south of Big Bend will move ene across the region today bringing periods of rainfall and continued cool temps due to limited heating. Precip should gradually taper off late in the afternoon and evening as the trough axis moves into La and a reinforcing front/dry air moves in behind it. Skies will clear from north-to-south overnight as high pressure builds into the region. Sunny skies w/ highs 55-60 on Friday. 47

Long Term (Friday night through Thursday)

Transitory upper ridging will move across the state to end the week. The subsidence within a west-northwest mid to upper flow pattern will keep skies mainly clear with surface high pressure draped over east state to maintain a weak northeast to easterly breeze through late Saturday. Weak, variable surface winds early Sunday will veer onshore ahead of the next approaching upper trough/weak surface boundary. This longwave trough will progressively pass east during the day Sunday with the current GFS solution being about 6 hours faster than the Euro's. Slight chances for showers late Sunday into early Monday but there will be little Quantitative Precipitation Forecast associated with the passage of this trough. There just isn't enough time to increase sufficient lower level moisture for widespread, more moderate precipitation. Light onshore flow for less than an afternoon will not be enough to saturate an already relatively dry resident air mass. Thus, any weak forcing induced by the passage of the upper trough will not have much moisture to work with overnight Monday morning.

This trough slows as shortwave energy out of central Canada deepens it over the eastern half of the country. This will place us on the dry and subsident western leg of its axis, under upper northwest winds through early Wednesday. Little change in the early work week synoptic pattern will maintain status quo weak breezes and moisture levels. Clear skies will offer up warming from the upper 60s to lower 70s Monday to the middle to upper 70s by Wednesday. Onshore flow does return Wednesday to make mid week feel much more southeast Texas-like...much warmer and more humid. Clear skies and weak lower level winds will keep nigheights cool (40s/low 50s by sunrise) but also introduce a higher probability of interior fog development per lower dew point depressions. Needless to say but, after Sunday night/Monday morning's slight rain chances, there will be nil precipitation probabilities through late Wednesday. 31

Marine... Look for increasing rain shower and possibly isolated tstms in the Gulf today as an upper level trough pushes across the area. The pressure gradient is currently tightening along the upper Tx coast in association w/ a surface coastal trough. Will hoist the caution flags for now, but will be upgraded to an advsy by mid morning w/ a continued increase of winds/seas. The coastal trough will trek ese thru the day as the upper system makes its way thru. Winds will back to the ne then north as this occurs. Precip will taper off this evening, but moderate offshore winds will persist and the advsy will likely need to be extended into the overnight hours. Diminishing ne flow and lowering seas should prevail going into the weekend. Light e/se winds will briefly resume early Sunday, but expect another front to push off the coast Sunday night and Monday. 47

Aviation... Ceilings are transitioning into MVFR (Marginal Visual Flight Rules) territory and will probably continue a downward trend (possibly IFR) later this morning as rainfall begins to overspread the area. Precip should begin tapering off later this afternoon and evening as the system moves off to the east. Clearing skies from north-to-south expected in the 3-10z timeframe. 47

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...NONE. GM...Small Craft Advisory until 6pm CST this evening for the following zones: Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM...Coastal waters from High Island to Freeport TX out 20 NM...Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM...Waters from High Island to Freeport TX from 20 to 60 NM.