Marine Weather Net

Baffin Bay to Port Aransas 20 - 60 NM Marine Forecast


TONIGHT

N
WINDS
20 - 25
KNOTS

FRIDAY

N
WINDS
20
KNOTS

FRIDAY NIGHT

NE
WINDS
10 - 15
KNOTS

SATURDAY

NE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ270 Forecast Issued: 318 PM CST Thu Nov 14 2019

SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY MORNING
Tonight...North Wind 20 To 25 Knots. Seas 7 To 9 Feet With Occasional Seas Up To 11 Feet. A Chance Of Showers In The Evening, Then A Slight Chance Of Showers After Midnight.
Friday...North Wind Around 20 Knots Decreasing To 15 To 20 Knots By The Afternoon. Seas 5 To 7 Feet With Occasional Seas Up To 9 Feet.
Friday Night...Northeast Wind 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet.
Saturday...Northeast Wind 5 To 10 Knots. Seas 2 To 4 Feet With Occasional Seas Up To 5 Feet.
Saturday Night...East Wind 5 To 10 Knots Shifting Southeast After Midnight. Seas 2 To 3 Feet.
Sunday...Southeast Wind Around 5 Knots Shifting East In The Afternoon. Seas 2 Feet.
Sunday Night...Northeast Wind Around 5 Knots Becoming North 10 To 15 Knots After Midnight. Seas 2 Feet. A Slight Chance Of Showers.
Monday...North Wind 10 To 15 Knots. Seas 2 To 3 Feet. A Slight Chance Of Showers.
Monday Night...North Wind 5 To 10 Knots Shifting West After Midnight. Seas 2 To 3 Feet Subsiding To 1 Feet After Midnight.
Tuesday...Northwest Wind 5 To 10 Knots Shifting North In The Afternoon. Seas 1 Feet.
Tuesday Night...Southeast Wind 5 To 10 Knots. Seas 0 To 1 Feet.
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Synopsis for Middle Texas coastal waters from Baffin Bay to Matagorda ship channel - GMZ200
318 PM CST Thu Nov 14 2019

Scattered showers and areas of light drizzle will linger over the coastal waters then diminish overnight. The gradient will increase tonight between an area of low pressure over the northwest Gulf of Mexico and high pressure building into south Texas. Moderate to strong north winds will occur tonight through Friday morning. A weak to moderate offshore flow is expected for Friday night. A weak onshore flow will develop Saturday night and Sunday as surface high pressure slides east and low pressure develops in the Texas Panhandle. A weak cold front will move off the Coast Sunday Night resulting in a weak to moderate offshore flow. Isolated showers will be possible along the front. Offshore winds will become weak and variable Monday night and Tuesday, then become more onshore Tuesday night.
Area Forecast Discussion
National Weather Service Corpus Christi TX
352pm CST Thu Nov 14 2019

Short Term - Tonight Through Friday Night
Satellite imagery shows the weakening upper low east of Matagorda Bay moving to the east. Some lingering light showers or areas of light drizzle will affect the coastal region early this evening. But drier air will finally push into south Texas tonight with skies clearing late tonight. With clearing skies inland, should see lows in the upper 30s across the northern counties. The gradient will be strong enough along the coast for breezy conditions for the island this evening as high pressure builds into south Texas. Dry conditions and mild temperatures are expected for Friday under mostly sunny skies. A cool night is in store for Friday night as the high pressure ridge settles over south Texas with lows in the mid to upper 30s.

Tide levels continue to run a little over a foot above expected levels at Bob Hall Pier and Port Aransas. This will lead to minor coastal flooding around time of high tide this evening. Adjusted the expiration until 06Z for possibility of flooding lingering for a few more hours past high tide. P-ETSS continues to show the tide levels will remain elevated through Friday with minor coastal flooding expected again around the time of the next high tide cycle late Friday afternoon and evening.

Long Term - Saturday through Thursday
Warming trend expected through the weekend as midlevel ridging builds in from the southwest, with highs reaching into the 60s and 70s. Onshore flow returns at the surface on Saturday and Sunday as surface high pressure slides off to the east and an area of low pressure develops across the Texas Panhandle. In the meantime, a longwave trough will dig through the Great Plains Saturday and Sunday, pushing a weak cold front through South Texas Sunday night into early Monday morning. Moisture should be sufficient enough for isolated showers along the boundary, but mainly be confined across the coastal region and across the gulf waters. An uptick in the winds is expected over the waters Monday, but Small Craft Advisories are not expected. Temperatures will not be greatly affected with the frontal boundary, however relatively humidity values in the afternoon will be noticeably lower.

Surface high pressure will build in on Monday, with a second weak reinforcement high on Tuesday, keeping things dry. Winds return out of the southeast Tuesday night as the surface high quickly slides east. Onshore flow will strengthen on Wednesday and Thursday as surface low pressure again develops near the Texas Panhandle. Breezy conditions are expected over land, but Small Craft Advisories will be possible for portions of the gulf waters. This should help return at least slight chances for rain for the latter half of next week.

Marine
Scattered showers and areas of light drizzle will linger over the coastal waters into the evening hours then diminish overnight as the weakening upper low/trough moves to the east. The gradient will increase tonight between the area of low pressure over the northwest Gulf of Mexico and high pressure building into south Texas. Moderate to strong north winds will occur tonight through early Friday morning. Winds are expected to diminish along the coast late and will expire the SCA (Small Craft Advisory) for the near shore waters at 10Z. The SCA (Small Craft Advisory) will linger until 18Z Friday even though the winds will have diminished below criteria early, the seas will likely remain elevated most of the morning. A weak to moderate offshore flow is expected for Friday night.

A weak onshore flow will develop Saturday night and Sunday as surface high pressure slides east and low pressure develops in the Texas Panhandle. A weak cold front will move off the Coast Sunday Night resulting in a weak to moderate offshore flow. Isolated showers will be possible along the front. Offshore winds will become weak and variable Monday night and Tuesday, then become more onshore Tuesday night. Small Craft Advisories may be needed for portions of the gulf waters Wednesday and Thursday as another area of low pressure develops near the Texas Panhandle.

NOAA Corpus Christi TX Office: Watches - Warnings - Advisories
TX...Coastal Flood Advisory until midnight CST tonight For the following zones: Kleberg Islands...Nueces Islands.

GM...Small Craft Advisory until noon CST Friday For the following zones: Waters from Baffin Bay to Port Aransas from 20 to 60 NM...Waters from Port Aransas to Matagorda Ship Channel from 20 to 60 NM.

Small Craft Advisory until 4am CST Friday For the following zones: Coastal waters from Baffin Bay to Port Aransas out 20 NM...Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM.