Marine Weather Net

High Island to Freeport, TX Marine Forecast


REST OF TODAY

NE
WINDS
15
KNOTS

TONIGHT

NE
WINDS
10 - 15
KNOTS

THURSDAY

N
WINDS
15 - 25
KNOTS

THURSDAY NIGHT

N
WINDS
25 - 30
KNOTS

The Marine Weather Forecast In Detail:
GMZ355 Forecast Issued: 348 PM CST Wed Feb 19 2020

SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY AFTERNOON ...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT...
Rest Of Today...Northeast Winds Around 15 Knots. Seas 3 To 4 Feet. A Slight Chance Of Showers.
Tonight...Northeast Winds 10 To 15 Knots. Seas 3 To 4 Feet. A Chance Of Showers Early In The Evening, Then Showers In The Late Evening And Overnight.
Thursday...North Winds 15 To 25 Knots Becoming 20 To 25 Knots In The Afternoon. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet. Showers Likely In The Morning, Then A Chance Of Showers In The Afternoon.
Thursday Night...North Winds 25 To 30 Knots Becoming Northeast 20 To 25 Knots After Midnight. Seas 5 To 7 Feet With Occasional Seas Up To 8 Feet.
Friday...Northeast Winds 15 To 25 Knots Becoming 15 To 20 Knots In The Afternoon. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet.
Friday Night...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Saturday...East Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Saturday Night...Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Sunday...South Winds 10 To 15 Knots. Seas 2 To 4 Feet. A Slight Chance Of Showers In The Late Morning And Afternoon.
Sunday Night...South Winds Around 15 Knots Becoming Southwest After Midnight. Seas 3 To 4 Feet. A Slight Chance Of Showers Until Early Morning. A Chance Of Showers Late.
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Synopsis for High Island to the Matagorda Ship Channel out 60 nautical miles including Galveston and Matagorda Bays - GMZ300
348 PM CST Wed Feb 19 2020

Expect overcast skies through the next 24 to 36 hours with scattered showers developing overnight tonight and into tomorrow morning due to a passing cold front. High pressure begins to slide down into the area tomorrow resulting in a strong offshore flow. A Small Craft Advisory has been issued for the Bays and all Gulf waters beginning on Thursday from 9 am through 3 pm. Winds continue to increase late Thursday afternoon through early Friday morning to near gale force, so the Gale Watch remains in effect for that time period. The strong winds will also increase seas to 4 to 6 feet in the near shore waters and to 8 to 10 feet in the off shore waters by tomorrow night. Winds and seas decrease Friday evening as high pressure settles in overhead.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
542pm CST Wednesday Feb 19 2020

.SHORT TERM [Through Thursday]... Expect overcast skies and scattered showers to continue through the rest of today and into tomorrow morning. An 850mb front is still located just to the north of the region where the current heaviest rainfall is located. This boundary is expected to push southward overnight tonight bringing with it increased coverage of showers. The GFS and EC are quicker with bringing the front down with it crossing into our northern counties by midnight, while the NAM and other short term guidance is slower by about 3 to 6 hours. All guidance agrees that as the front pushes south, it weakens resulting in decreasing shower coverage. There will be quite the gradient in precipitation totals with areas along and north of Madison, Walker, and Polk counties receiving one to two inches, while Harris County and areas southward will only end up with up to a quarter of an inch or less. This gradient is because of the continued light showers that are falling across the northern counties this afternoon and the line of showers will be dissipating as it propagates southwards tonight due to the weakening front. By noon tomorrow, most of the showers will have moved offshore with some lingering showers along the coast, but we can expect the mostly cloudy skies to linger through the day. The passage of the front will usher in moderate northerly winds tomorrow afternoon with sustained winds of around 10 to 15 kts with gusts up to 20 to 25 kts. Stronger winds will be possible along the immediate coast that will be borderline to wind advisory criteria, but since it's so close I'll defer the decision to a later shift.

Temperatures over the next 36 hours will basically just flat line through the period because of the thick overcast skies and passage of the front. Temperatures at midnight tonight will be in the low to mid 50s across most of the area (down into the upper 40s along the northern counties), but by noon tomorrow the temperatures will basically be the exact same, if not a few degrees colder. With the stronger northerly flow and decreasing cloud cover, tomorrow evening and tomorrow night will be much colder.

LONG TERM [Thursday Night Through Wednesday]... Precip should be well off the coast Thursday night and cloudiness should be on a gradual decline as high pressure builds into the region. Breezy and cool conditions are expected into Friday. With mclr skies and light winds Friday night, overnight lows will dip close to, or below, freezing overnight for areas generally north of I-10...and esp east of I-45.

A gradual moderating trend is expected over the weekend as onshore winds resume. The next upper trough will make its way across Rockies and into the Plains on Sunday. Its associated frontal boundary should push thru southeast Tx late Sunday night or Monday morning. Though there may be some iso/scattered rain shower in advance, expectations aren't too high as swly llevel flow in advance may pose a capping limitation.

Dry weather should then persist in the wake of this front with a reinforcing stronger front expected Tuesday night or Wed. 47

Marine Discussion
Expect overcast skies through the next 24 to 36 hours with scattered showers developing overnight tonight and into tomorrow morning due to a passing cold front. High pressure begins to slide down into the area tomorrow resulting in a strong offshore flow. A Small Craft Advisory has been issued for the Bays and all Gulf waters beginning on Thursday from 9 am through 3 pm. Winds continue to increase late Thursday afternoon through early Friday morning to near gale force, so the Gale Watch remains in effect for that time period. The strong winds will also increase seas to 4 to 6 feet in the near shore waters and to 8 to 10 feet in the off shore waters by tomorrow night. Winds and seas decrease Friday evening as high pressure settles in overhead. The high pressure slides to the east over the weekend ushering in light onshore flow by Saturday evening with sky cover increasing on Sunday. The next cold front is expected to move through the area on Monday.

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...NONE. GM...Small Craft Advisory from 9am to 3pm CST Thursday 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...Galveston Bay...Matagorda Bay... 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.

Gale Watch from Thursday afternoon through late Thursday night 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.