Marine Weather Net

Bays and Waterways from Baffin Bay to Port Aransas Marine Forecast


TODAY

S
WINDS
5 - 10
KNOTS

TONIGHT

N
WINDS
10 - 15
KNOTS

SATURDAY

N
WINDS
10 - 15
KNOTS

SATURDAY NIGHT

NE
WINDS < 5
KNOTS

The Marine Weather Forecast In Detail:
GMZ230 Forecast Issued: 234 AM CST Fri Nov 22 2019

Today...South Wind 5 To 10 Knots Shifting West Late. Bays Smooth. A Slight Chance Of Showers.
Tonight...North Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy. A Slight Chance Of Showers.
Saturday...North Wind 10 To 15 Knots Decreasing To 5 To 10 Knots In The Afternoon. Bays Slightly Choppy To Occasionally Choppy.
Saturday Night...Northeast Wind Up To 5 Knots Shifting North After Midnight. Bays Smooth.
Sunday...Northeast Wind Around 5 Knots Shifting Southeast In The Afternoon. Bays Smooth.
Sunday Night...South Wind 5 To 10 Knots. Bays Smooth.
Monday...South Wind 5 To 10 Knots. Bays Smooth.
Monday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Tuesday...South Wind 10 To 15 Knots Becoming Southeast 5 To 10 Knots In The Afternoon. Bays Slightly Choppy To Occasionally Choppy.
Tuesday Night...Northeast Wind 5 To 10 Knots Increasing To 10 To 15 Knots After Midnight. Bays Slightly Choppy To Occasionally Choppy.
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Synopsis for Middle Texas coastal waters from Baffin Bay to Matagorda ship channel - GMZ200
234 AM CST Fri Nov 22 2019

A weak to moderate onshore flow is expected to weaken this morning ahead of a late afternoon cold front. Scattered showers and isolated thunderstorms will develop today and linger through tonight. Moderate offshore flow is expected tonight, but should stay just below advisory criteria. Rain chances will diminish on Saturday with drier air filtering in from the north. A light to moderate northerly flow will persist through the weekend. Weak onshore flow will resume Sunday night and become moderate to strong by Tuesday ahead of another cold front.
Area Forecast Discussion
National Weather Service Corpus Christi TX
616am CST Fri Nov 22 2019

Short Term - Today Through Saturday
Upper level low will continue to transition eastward into the Central Plains today, sending an associated cold front through South Texas this afternoon. The front, which is currently located just north of the Texas Hill Country per observations, will approach our northern zones around mid-day today and reach the Coastal Bend by the late afternoon hours. Isolated showers have developed across the area early this morning, and isolated to scattered showers are expected to continue to develop through the day ahead and along the boundary. A few embedded thunderstorms will also be possible along the front, mainly over the eastern half of the CWA where higher instability and moisture will reside. A generally weak to moderate southerly flow this morning will further weaken ahead of the cold front, before winds shift to the north and increase again to moderate levels in the afternoon/evening in its wake. Much drier conditions are expected overnight, with rain chances confined to the coastal waters. The cooler and drier airmass will move over the region tonight as a surface high pressure builds across the state.

Above normal temperatures can be expected again today ahead of the front, with highs ranging from the upper 70s to the mid 80s. Temperatures will return to near normal values tonight, with overnight lows in the upper 40s to the mid 50s. Very pleasant conditions on Saturday with highs in the lower 70s, clearing skies and a light northerly wind in the afternoon.

Long Term - Saturday Night through Thursday
A quiet beginning is expected for the long term forecast. Surface high pressure and zonal flow will prohibit precipitation. Pleasant days should continue through Monday, with comfortable temperatures and mostly sunny skies. Onshore flow will return late Sunday, bringing moisture back into the area. PWATs (Precipitable Waters) will remain below normal ahead of a cold front expected to move through Tuesday. Even with the increased moisture, really only expect slight chances of rain, mainly to the northeast.

A cool down behind the front is likely, but there is still some question how much cooler. A coastal trough may develop which would keep Probability of Precipitation slightly higher and increase the cloud cover leading to cooler temperatures. The ECMWF (European Centre for Medium-Range Weather Forecasts) continues to be the drier solution with warmer temperatures. At this point, continued the trend from the previous forecast, keeping temperatures slightly cooler.

Marine Discussion
A weak to moderate onshore flow is expected to weaken this morning ahead of a late afternoon/evening cold front. Isolated to scattered showers and isolated thunderstorms will develop today and linger through tonight. Moderate offshore flow is expected tonight, but should stay at SCEC levels just below advisory criteria. Rain chances will diminish on Saturday with drier air filtering in from the north. A light to moderate northerly flow will persist through the weekend. Weak onshore flow will return Sunday night. Winds will become moderate by Tuesday ahead of the next cold front. SCEC conditions (Small Craft Should Exercise Caution) are expected ahead of the front, but there is some possibility that SCA (Small Craft Advisory) conditions could occur over the Gulf waters with strong offshore flow behind the front. A slight chance to chance of rain is possible Tuesday through Thursday.

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