Marine Weather Net

High Island to Freeport, TX Marine Forecast


TODAY

NE
WINDS
20 - 25
KNOTS

TONIGHT

NE
WINDS
20
KNOTS

MONDAY

NE
WINDS
20
KNOTS

MONDAY NIGHT

NE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ355 Forecast Issued: 339 AM CST Sun Jan 19 2020

SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY MORNING
Today...Northeast Winds 20 To 25 Knots. Seas 5 To 7 Feet With Occasional Seas Up To 8 Feet.
Tonight...Northeast Winds 20 Knots. Seas 3 To 5 Feet.
Monday...Northeast Winds Around 20 Knots Decreasing To 10 To 15 Knots In The Afternoon. Seas 3 To 5 Feet.
Monday Night...Northeast Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Tuesday...East Winds 15 To 20 Knots. Seas 2 To 4 Feet.
Tuesday Night...East Winds 15 To 20 Knots. Seas 3 To 5 Feet. A Slight Chance Of Showers Early In The Evening. A Chance Of Showers In The Late Evening And Overnight.
Wednesday...Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet. A Chance Of Showers In The Morning, Then Showers In The Afternoon. Isolated Thunderstorms Late In The Afternoon.
Wednesday Night...Southeast Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet. Showers Likely And Isolated Thunderstorms.
Thursday...South Winds 10 To 15 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 7 Feet. Showers Likely And Isolated Thunderstorms.
Thursday Night...West Winds 10 To 15 Knots Becoming Northwest After Midnight. Seas 3 To 5 Feet. A Chance Of Showers Until Early Morning. Isolated Thunderstorms. A Slight 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
339 AM CST Sun Jan 19 2020

Strong northeast winds will persist well into the week. Strong easterly winds should maintain higher sea heights while pushing higher water onto the coast. This may cause minor coastal flooding during high tide. The approach and passage of a western disturbance to be followed by an early Friday cold front will increase mid to late work week precipitation chances.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
527am CST Sunday Jan 19 2020

SHORT TERM [Tonight through Tomorrow]... Post-frontal northerlies will remain pronounced through the day as a near 1034 mb high over Oklahoma presses a tight offshore gradient across the region. Inland brisk northeast winds should range in the 15-20 mph, 25 mph in gust / coastal near 20 mph, 30 mph in gust through the day. Mostly sunny skies with temperatures sluggishly warming into the average middle 50s and low 30-40% humidities within this cold air advection pattern.

Overnight north breezes will make Monday's sunrise conditions 'feel' like freezing within dry air mass as interior temperatures fall into the 30s shortly after midnight. Monday will be another very pleasant, dry and cool day but with a much weaker northeast wind. The afternoon will again slowly warm into the middle 50s under continued low relative humidities. 31

Long Term - Tuesday Through Sunday
After a cold morning on Tuesday (lows in the 30s inland and 40s near the coast), clouds will begin their return as surface high pressure moves off to the east and onshore winds make their way back to the area. Look for highs on Tuesday to peak in the 50s for a majority of the area (maybe getting into the lower 60s around our southwest counties). A strengthening onshore flow Tuesday night leads to rising moisture levels, and expect to see rising rain chances from west to east as the overnight hours progress. Low temperatures should be in the 40s inland and in the 50s near the coast. The Wednesday-Thursday time period is looking cloudy and wet with periods of showers (maybe some isolated thunderstorms too) as the next storm system slowly organizes/intensifies as it moves eastward across the Southern Plains. In the Wednesday afternoon through Thursday morning time period, there are some indications by the models that locally heavy rainfall might be possible with this system near the coast and offshore. Currently have rainfall totals for this event ranging from around 1/2 to 1 inch north to close to 2 inches near the coast and offshore. The cold front with this system eventually moves through the area (late Thursday or early Friday?) and dries things out. We could see highs in the 60s/70s on Thursday, and that will probably be the warmest day of the week. Behind the front, generally expecting to see lows back down in the 30s/40s and highs in the 50s/60s. Will be carrying near normal late January temperatures and a mostly dry forecast for the weekend. 42

Marine Discussion
Strong 20-25 knot, with occasional gusts to 35 knots, north to northeast winds over the far offshore waters will maintain rough bay conditions and drive nearshore significant wave heigheights up 5 to 7 feet, 7 to around 11 foot heigheights offshore. Thus, Small Craft Advisory flags will remain in place through the morning. Winds will fall off to Caution criteria over the local bays this afternoon with sustained northeast winds remaining above 20 knots over the Gulf that will keep Advisory flags up through Monday morning. Monday through Wednesday's easterlies will remain moderate to strong as Plains high pressure advances east and maintains a tight east-to- west pressure gradient across the NW Gulf. This long duration east fetch will begin piling up water along eastern-facing beaches at mid week. Wednesday and Thursday water levels will likely reach and exceed 3 ft above MLLW during times of high tide. During this time, the passage of a western mid-week shortwave trough will increase shower and thunderstorm chances to likely. 31

NOAA Houston/Galveston TX Office: Watches - Warnings - Advisories
TX...NONE. GM...Small Craft Advisory until noon CST today for the following zones: Galveston Bay...Matagorda Bay.

SMALL CRAFT SHOULD EXERCISE CAUTION from noon CST today through Monday morning for the following zones: Galveston Bay... Matagorda Bay.

Small Craft Advisory until noon CST Monday 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.