Marine Weather Net

Baffin Bay to Port Aransas 20 - 60 NM Marine Forecast


REST OF TONIGHT

NE
WINDS
10
KNOTS

FRIDAY

N
WINDS
5
KNOTS

FRIDAY NIGHT

E
WINDS
5 - 10
KNOTS

SATURDAY

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ270 Forecast Issued: 1027 PM CDT Thu Sep 24 2020

Rest Of Tonight...Northeast Wind Around 10 Knots Becoming North Early In The Morning. Seas 2 To 3 Feet.
Friday...North Wind Around 5 Knots Shifting Northeast In The Afternoon. Seas 2 Feet.
Friday Night...East Wind 5 To 10 Knots Shifting Southeast After Midnight. Seas 2 Feet.
Saturday...South Wind 5 To 10 Knots. Seas 2 To 3 Feet.
Saturday Night...Southeast Wind 10 To 15 Knots. Seas 2 To 4 Feet With Occasional Seas Up To 5 Feet.
Sunday...Southeast Wind 10 To 15 Knots. Seas 3 To 4 Feet With Occasional Seas Up To 5 Feet.
Sunday Night...Southeast Wind 10 To 15 Knots. Seas 3 Feet.
Monday...East Wind Around 10 Knots. Seas 2 To 3 Feet.
Monday Night...East Wind 5 To 10 Knots. Seas 2 To 3 Feet.
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Synopsis for Middle Texas coastal waters from Baffin Bay to Matagorda ship channel - GMZ200
1027 PM CDT Thu Sep 24 2020

A weak offshore flow will persist through Friday, then shift around to onshore by Friday night. The onshore flow will then increase to moderate by Saturday evening through Sunday. Moderate Flow will become offshore Monday morning associated with the passage of a frontal boundary with possible SCEC conditions until Tuesday morning. Winds will then shift from offshore flow to a weak onshore flow by the middle of next week after passage of the boundary.
Area Forecast Discussion
National Weather Service Corpus Christi TX
1159pm CDT Thu September 24 2020

Updated for 06Z Aviation Discussion.

Tide levels continue to be slightly above 1 foot above expected at Bob Hall Pier. This will lead to tides reaching 2.3 to 2.4 feet MSL at the next high tide after midnight. Issued a Coastal Flood Advisory for Gulf coast beaches of Nueces/Kleberg

AVIATION... Broken cloud deck will linger around VCT area until around 03Z. Otherwise, VFR conditions and mostly clear skies will occur this evening and early overnight period. NMM shows lower clouds/MVFR ceilings will reform over the Brush Country from 08-10Z while sporadic MVFR (Marginal Visual Flight Rules) ceilings could affect the coastal plains. Patchy fog will be possible in the VCT area where visibilities will mainly be MVFR (Marginal Visual Flight Rules) from 10-14Z. Clouds will scatter out during 15-16Z time frame with VFR conditions prevalent across south Texas through Friday afternoon.

Short Term - Tonight Through Friday Night
Fairly quiet weather in the short term period despite an upper level trough overhead. Surface pressure continues to build over the region and layer moisture continues to decrease...possibly below 1 inch from tonight through Friday. These two elements are not overcome by the mid level energy, thus will see a dry and mostly sunny short term period. Temperatures today were capped in the northeast by persistent thick cloud cover at least loosely still associated with the remnants of Beta. Elsewhere clouds have scattered and allowed temperatures to return to near normal highs. Expect similar values tomorrow, but should be able to warm more in the northeast. Overnight will be comfortable tonight in the 60s for most of the region. With southeasterly flow redeveloping on Friday, min temps will be up a bit for Friday night.

Coastal flood potential for tonight is not certain. Bob Hall currently running about a foot above predicted right now could top a bit over 2 feet, but if the differential continues to drop, we wouldn't make it. Will hold off on coastal flood advisory for this time as other sites all appear to stay below 2 feet. If Bob Hall looks to rise much above 2 feet at high tide around midnight, may need to issue a short duration advisory.

Long Term - Saturday through Thursday
Dry conditions prevail as surface high pressure builds over the weekend. An upper level trough draped from SW to NE TX along with a surface low over central TX will provide divergence aloft to some areas of the CWA but even with a shortwave moving through the region Saturday this will not be enough to bring any measurable precip. PWATs (Precipitable Waters) overall are expected to remain below normal for this time of year and the best chances of any showers remain just offshore where moisture is a smidge higher. Models are coming into better agreement for a frontal boundary moving through the area on Monday and have increased Probability of Precipitation to Isolated and have increased winds. The rest of the period remains quiet and dry.

Marine Discussion

A weak offshore flow persists through the day Friday, then shifting around to onshore by Friday night. The onshore flow will then increase to moderate by Saturday evening through Sunday. Moderate Flow will become offshore Monday morning associated with the passage of a frontal boundary with possible SCEC conditions (Small Craft Should Exercise Caution) until Tuesday morning. Winds will then shift from offshore flow to a weak onshore flow by the middle of next week after passage of the boundary.



NOAA Corpus Christi TX Office: Watches - Warnings - Advisories
TX...Coastal Flood Advisory until 7am CDT Friday For the following zones: Kleberg Islands...Nueces Islands.

GM...None.