Marine Weather Net

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


TODAY

S
WINDS
5 - 10
KNOTS

TONIGHT

S
WINDS
10 - 15
KNOTS

SATURDAY

S
WINDS
10 - 15
KNOTS

SATURDAY NIGHT

S
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ235 Forecast Issued: 359 AM CDT Fri Jul 03 2020

Today...South Wind 5 To 10 Knots Becoming Southeast 10 To 15 Knots Late. Bays Slightly Choppy To Occasionally Choppy.
Tonight...South Wind 10 To 15 Knots Decreasing To 5 To 10 Knots After Midnight. Bays Slightly Choppy To Occasionally Choppy.
Saturday...Southwest Wind 5 To 10 Knots Becoming South 10 To 15 Knots In The Afternoon. Bays Slightly Choppy To Occasionally Choppy.
Saturday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Sunday...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Sunday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Monday...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Monday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
Tuesday...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy. A Slight Chance Of Showers And Thunderstorms.
Tuesday Night...South Wind 10 To 15 Knots. Bays Slightly Choppy To Occasionally Choppy.
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Synopsis for Middle Texas coastal waters from Baffin Bay to Matagorda ship channel - GMZ200
359 AM CDT Fri Jul 3 2020

Weak to moderate onshore flow expected today through Saturday due to weak surface high pressure over the northwest Gulf of Mexico and surface low pressure over West Texas. A weak to moderate southerly flow is expected to Sunday through Monday, becoming an onshore flow by Monday afternoon and prevailing through the end of the week. Seas are expected to be between 3 to 4 feet building to 5 feet by Wednesday before subsiding back to 4 feet late Thursday. Significant precipitation is not expected across the local waters, however, there will be a chance for showers and thunderstorms Tuesday and Wednesday with the best chances being on Tuesday.
Area Forecast Discussion
...CORRECTED National Weather Service Corpus Christi TX
406am CDT Fri July 3 2020

Short Term - Today Through Saturday
The upper level high pressure system over the region this morning is expected to move westward during the period, while an upper trough enters the western Gulf of Mexico (deterministic GFS/NAM/ECMWF), consistent with subsidence over the CWA/MSA. The combination of the upper pattern and below normal PWAT (Precipitable Water) values (GFS/NAM deterministic runs) will preclude PCPN over the CWA. Do not expect dust extinction sufficient to reduce visibilities below 7SM. ETSS output suggest that water levels will remain below 2ft MSL. Expect maximum Heat Index values in the 100-105F range. Predicted NAM thermodynamic profiles and SREF probability output suggest that at least patchy fog may occur over the ERN CWA early Saturday morning.

Long Term - Saturday Night through Thursday Night
The long term forecast begins with an upper level high pressure located across Western Texas which will result in hot and dry conditions through the weekend. As the high pressure moves westward early next week, an upper level low pressure will move into the southeastern United States located around the Mississippi/Alabama border. This disturbance will remain in place until Tuesday which is when it will begin to move northeastward. This disturbance will emit some pulses of vorticity in the 700 mb level which will coincide with an area of moisture with PWAT's (Precipitable Waters) around 2 inches. A strong cap will be in place across the CWA, but is expected to weaken across the Victoria Crossroads and Coastal Bend. Therefore, isolated to scattered showers and thunderstorms are possible Monday through Wednesday afternoons with the best chance of precipitation Tuesday afternoon.

Temperatures will range within the lower 90s to mid 100s, from east to west for the duration of the long term period. SPS conditions are expected each afternoon with heat indices between 105 and 109 degrees with the possibility of advisory conditions being met across the Rio Grande. Temperatures are expected to remain warm at nigheights with lows ranging within the mid 70s to mid 80s.

Marine
Weak to moderate onshore flow expected today through Saturday, due to weak surface high pressure over the northwest Gulf of Mexico and surface low pressure over West Texas. A weak to moderate southerly flow is expected Sunday through Monday, becoming an onshore flow by Monday afternoon and prevailing through the end of the week. Seas are expected to be between 3 to 4 feet building to 5 feet by Wednesday before subsiding back to 4 feet late Thursday. Significant precipitation is not expected across the local waters, however, there will be a chance for showers and thunderstorms Tuesday and Wednesday with the best chances being on Tuesday.

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