Marine Weather Net

Bay and Waterways from Port Aransas to Port O'Connor Marine Forecast


REST OF TONIGHT

S
WINDS
5 - 10
KNOTS

THURSDAY

W
WINDS
5 - 10
KNOTS

THURSDAY NIGHT

S
WINDS
5 - 10
KNOTS

FRIDAY

W
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ235 Forecast Issued: 936 PM CST Wed Jan 20 2021

Rest Of Tonight...South Wind 5 To 10 Knots Shifting Southwest After Midnight, Then Shifting South Early In The Morning. Bays Smooth. Areas Of Fog. A Slight Chance Of Showers After Midnight.
Thursday...West Wind 5 To 10 Knots Shifting South In The Afternoon. Bays Smooth. Patchy Fog In The Morning. A Slight Chance Of Showers In The Morning.
Thursday Night...South Wind 5 To 10 Knots. Bays Smooth. A Slight Chance Of Showers.
Friday...West Wind 5 To 10 Knots. Bays Smooth. Patchy Fog In The Morning. A Slight Chance Of Showers In The Morning.
Friday Night...Northeast Wind 5 To 10 Knots. Bays Smooth To Slightly Choppy.
Saturday...East Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy. A Chance Of Showers.
Saturday Night...Southeast Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy. A Slight Chance Of Showers In The Evening, Then A Chance Of Showers After Midnight.
Sunday...South Wind 15 To 20 Knots. Bays Choppy. A Chance Of Showers And Thunderstorms.
Sunday Night...South Wind 15 To 20 Knots. Bays Choppy. A Slight Chance Of Showers And Thunderstorms.
Monday...Southwest Wind 10 To 15 Knots Shifting Northwest In The Afternoon. Bays Slightly Choppy To Occasionally Choppy. A Slight Chance Of Showers And Thunderstorms.
Monday Night...Northeast Wind 5 To 10 Knots. Bays Smooth To Slightly Choppy.
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Synopsis for Middle Texas coastal waters from Baffin Bay to Matagorda ship channel - GMZ200
936 PM CST Wed Jan 20 2021

Weak to moderate southerly flow is expected tonight through Thursday. A few showers will remain possible tonight through Thursday morning. Patchy to areas of fog will also be possible along the coast overnight. A light southwesterly to westerly flow Friday will turn out of the east to northeast Friday night in response to a weak cold front moving across the region. A weak to moderate southerly flow returns Saturday night and strengthens to moderate to strong levels Sunday into Sunday night. Another front is expected to push across the area on Monday leading to a weak to moderate offshore flow behind it. Sea fog will be a concern through the week. Isolated to scattered showers and thunderstorms will be possible through the week and into the weekend.
Area Forecast Discussion
National Weather Service Corpus Christi TX
1128pm CST Wednesday Jan 20 2021

Short Term - Tonight Through Thursday Night
A weak boundary remains stalled near the coast this afternoon with northeasterly winds for the Coastal Bend and Victoria, and northwesterly winds for the remainder of the region. This boundary is likely to remain stalled there or wobble a bit overnight Light rain will continue, especially west of the front as isentropic lift persists. The rain will eventually drift eastward later tonight with decreasing coverage. Have mainly slight chance PoPs, but pockets of change in central portions of the area. Generally light rainfall amounts are expected through the night. With already hazy/humid conditions, it wouldn't take much for for to decrease visibilities further tonight, especially to the east of the stalled boundary. Not expecting widespread dense fog though, and northeasterly wind should keep sea fog from developing. By Thursday, The boundary looks to drift back inland with southerly flow developing east of it tomorrow. Temperatures should be a bit warmer tomorrow but with plenty of cloud cover persisting, leaned more toward the cooler NAM with highs in the upper 60s and lower 70s. Fog will be possible again Thursday night.

Long Term - Friday through Wednesday
The combination of plentiful available moisture, and the passing of a mid-level disturbance and associated weak frontal boundary may lead to isolated showers Friday morning. However, the rain should quickly clear out of the area in the afternoon as a drier airmass and surface high pressure settles in behind the front.

Onshore flow is expected to resume by Saturday as the surface high shifts eastward. This will allow for a steady increase in moisture across the region which may lead to additional showers over the weekend.

Rain and thunderstorms chances will further increase on Sunday with the arrival of even deeper moisture, and with better instability available provided by the presence of some weak upper level jet dynamics and another passing shortwave aloft. Thunderstorm chances will linger into Monday as another cold front is forecast to move across the area.

Drier and slightly cooler conditions are then expected Monday night through early Wednesday as a surface high pressure gains control in the wake of the front while maintaining a persistent offshore flow over the region.

Despite the frontal passages, above normal temperatures will continue through the period. Highs will generally be in the 70s to 80s range, with lows in the 50s to 60s.

In addition to the rain, patchy fog and sea fog will remain possible through the weekend due to a combination of onshore winds and a warm moist layer over cooler waters.

Marine Discussion

Weak to moderate easterly flow will become more southeasterly tonight and tomorrow with a mainly south wind by later tomorrow. A few showers will remain possible A light southwesterly to westerly flow Friday, will become from the east to northeast Friday night into Saturday in response to a weak cold front moving across the region. A weak to moderate southerly flow returns Saturday night and strengthens to moderate to strong levels Sunday into Sunday night. Another front is expected to push across the area on Monday leading to a weak to moderate offshore flow behind it. Sea fog will be a concern through the week. Isolated to scattered showers and thunderstorms will be possible through the week and into the weekend.

NOAA Corpus Christi TX Office: Watches - Warnings - Advisories
TX...None. GM...None.