Sunday, April18, 2021
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Marine Weather and Tides
Port O'Connor, TX

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:57AMSunset 7:57PM Sunday April 18, 2021 2:46 PM CDT (19:46 UTC) Moonrise 10:25AMMoonset 12:02AM Illumination 43% Phase: First Quarter Moon; Moon at 7 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ330 Matagorda Bay- 1209 Pm Cdt Sun Apr 18 2021
Rest of today..North winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Tonight..Northeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..Northeast winds 10 to 15 knots becoming east 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Monday night..East winds 5 to 10 knots becoming northeast after midnight. Bay waters smooth.
Tuesday..East winds 5 to 10 knots becoming southeast in the afternoon. Bay waters smooth.
Tuesday night..East winds 10 to 15 knots becoming north 15 to 20 knots after midnight. Bay waters slightly choppy becoming choppy after midnight.
Wednesday..Northeast winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon.
Wednesday night..East winds 10 to 15 knots. Bay waters slightly choppy.
Thursday..East winds 15 to 20 knots. Bay waters choppy.
Thursday night..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1209 Pm Cdt Sun Apr 18 2021
Synopsis for high island to matagorda ship channel out 60 nm.. Strong to moderate north to northeast winds will continue through the morning hours, then diminish through the day with light to moderate northeast expected tonight into Monday. Wave heights will remain near 5 to 6 feet through at least Monday morning. Isolated showers will be possible across the coastal waters through this afternoon. Surface high pressure drifts over southeast texas on Monday inducing an easterly flow Monday night and then southeasterly by Tuesday. A cold front will cross the coastal waters Tuesday night returning northerly flow for Wednesday.


7 Day Forecast for Marine Location Near Port O'Connor, TX
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location: 28.44, -96.4     debug


Area Discussion for - Corpus Christi, TX
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FXUS64 KCRP 181846 AFDCRP

Area Forecast Discussion National Weather Service Corpus Christi TX 146 PM CDT Sun Apr 18 2021

AVIATION.

VFR conditions and weak/moderate wind expected during the TAF period.

PREV DISCUSSION. /Issued 932 AM CDT Sun Apr 18 2021/

DISCUSSION .

Updated forecast to add isolated showers to all of the Coastal Plains, and isolated showers/thunderstorms to the Coastal Waters, based on radar data. Adjusted timing of convection based on deterministic predictions of position of the RRQ of a 500 mb jet streak, and to a lesser extent the NAM/GFS isentropic lift predictions at the 305K level.

PREV DISCUSSION . /Issued 655 AM CDT Sun Apr 18 2021/

AVIATION .

/12Z TAFs/ Isolated showers with a few embedded thunderstorms are moving in from the southwest this morning across the southern Coastal Bend which have a chance to impact the ALI and CRP sites. Have included tempos through 14Z due to the isolated nature of things. Activity should diminish through the late afternoon and evening period. Otherwise, VFR through the period with high clouds. General N-NE 10-15 KT winds through much of the day, weakening a bit this evening. Winds toward COT-LRD should take on a more E-ly flow this evening.

PREV DISCUSSION . /Issued 452 AM CDT Sun Apr 18 2021/

SHORT TERM (Today through Monday) .

Convection continues this morning across Deep South Texas, slowly moving northward into South Texas and the adjacent waters. This is due to an overruning pattern following yesterday's cold front. Some tapping into elevated instability is leading to a few thunderstorms, but expecting as showers/storms move north, slightly less instability should help in keep a weakening trend. Chances for rain should then taper off for this evening. Persistent northerly wind and thick cloud cover should maintain cool temperatures today in the upper 60s to lower 70s. Some breaks in the clouds will be possible overnight, but thicken again for Monday. Overnight lows tonight should dip into the low-to-mid 50s for most areas, with lows in the lower 60s near the coast. Slightly warmer conditions will be expected for Monday, but still have temperatures in the 70s as winds take on a more easterly component.

Another Coastal Flood Advisory is in effect for today as tides continue to run about 1 foot above predicted which should allow tides to reach 2 ft above MSL during high tide. PETSS and ETSS continue to show a lowering trend for Monday, but due to persistent NE flow which aids in an extra push of water toward the shore may keep another day for coastal flooding. Will continue to monitor.

LONG TERM (Monday Night through Saturday) .

Following a dry start, the extended forecast is shaping up rather interesting by the end of the workweek as unseasonably rich moisture unfolds ahead of a shortwave trough. Until this point, forecast challenges are slim as dry surface ridging early in the week is reinforced by a cold front Tue night. Generally zonal flow will keep this boundary from dropping too far south of our area before pressure falls over western Texas tug this north as a slow-moving warm front beginning Wednesday night. Moisture advection will ratchet up in this breezy to windy onshore flow regime with PWATs touching nearly 2 inches by Friday. The pattern by Thursday morning already supports some isentropic-driven showers, translating to shallow, surface based instability during the daytime as the moist layer deepens beneath a respectable cap around 700 mb.

Capping is progged to become less of a factor on Friday as models are converging on a shortwave trough in westerly flow cooling off this critical layer via dynamic ascent/height falls. The GFS is more dampened with this wave compared to remaining guidance and not as robust with lift, but all models still convect on Friday thanks to impressive PWATs coinciding with steep lapse rates and weakening CIN. Although subject to considerable change, initial inspection of kinematic and thermodynamic profiles on Friday afternoon and evening points to a potential severe convective episode for portions of our region all the way to North Texas. Nudged Friday's PoPs upward for the improved model consensus, before trending low on Saturday following a Pacific cold front with dry northerly trajectories. Will watch to see if the GFS gains support from other guidance in ejecting a pair of shortwaves from Fri-Sat as this would prolong chances for additional deep convection on Saturday. Else, temps will rise to more seasonal levels on Tue, followed by a brief cooldown on Wed, before returning to mild readings by late week into the weekend. Coastal flooding-wise, the latest P-ETSS shows this threat tapering through midweek, although a period of stronger NE flow Wed morning could easily enhance this threat during high tides later that day.

MARINE .

Isolated showers are expected to continue today. Strong north to northeast winds and elevated seas this morning will gradually diminish and subside this afternoon. A Small Craft Advisory is in place through this afternoon. Drier conditions are expected for tonight and Monday.

Weak to moderate northeast flow continues through Tuesday night until a dry cold front early Wednesday morning ushers in a period of strong northeast winds with Small Craft Advisory conditions possible. This flow will become moderate by late Wednesday while turning onshore and continuing through late week. Onshore winds could become strong at times from Thursday through Friday. Isolated to scattered showers and thunderstorms may develop Thursday night and Friday ahead of an upper disturbance.

PRELIMINARY POINT TEMPS/POPS. Corpus Christi 54 71 57 81 55 / 10 10 10 10 0 Victoria 50 73 54 82 48 / 10 10 10 10 0 Laredo 55 74 57 86 57 / 10 10 10 0 0 Alice 52 72 54 86 53 / 10 10 10 10 0 Rockport 58 72 61 80 54 / 10 10 10 10 0 Cotulla 52 78 54 88 52 / 10 10 0 0 0 Kingsville 53 72 56 83 55 / 10 10 10 10 0 Navy Corpus 62 70 63 76 59 / 10 10 10 10 0

CRP WATCHES/WARNINGS/ADVISORIES. TX . Coastal Flood Advisory until 3 PM CDT this afternoon For the following zones: Aransas Islands . Calhoun Islands . Kleberg Islands . Nueces Islands.

GM . Small Craft Advisory until 4 PM CDT this afternoon 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.



WC/87 . AVIATION


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 0 mi46 min N 14 G 19 60°F 63°F1019.1 hPa (-1.4)
MBET2 4 mi46 min NE 13 G 19 61°F 1017.7 hPa (-1.3)
SDRT2 - 8773037 - Seadrift, TX 17 mi46 min NNW 8.9 G 15 61°F 65°F1019.3 hPa (-1.1)
VCAT2 18 mi46 min N 12 G 14 61°F 62°F1019 hPa (-1.8)
AWRT2 26 mi46 min N 12 G 16 60°F 62°F1018.7 hPa (-1.0)
EMAT2 32 mi46 min NNW 14 G 17 61°F 67°F1018.2 hPa (-1.0)
MAXT2 - Mission-Aransas Reserve, TX 40 mi46 min NNW 12 60°F 1021 hPa (+0.0)48°F
KBQX 42 mi31 min NNE 16 G 23 61°F 48°F
RCPT2 - 8774770 - Rockport, TX 45 mi46 min N 8.9 G 13 62°F 71°F1020.1 hPa (-0.9)
SGNT2 47 mi46 min N 5.1 G 8 61°F 67°F1018.3 hPa (-0.4)

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX21 mi54 minN 14 G 2210.00 miOvercast63°F45°F52%1018.9 hPa
Port Lavaca - Calhoun County Airport, TX21 mi51 minN 1310.00 miMostly Cloudy66°F44°F45%1019.3 hPa

Link to 5 minute data for KPKV

Wind History from PKV (wind in knots)
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1 day agoS9SW4N6NE4N4N13
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Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Sun -- 01:02 AM CDT     Moonset
Sun -- 04:02 AM CDT     0.08 feet Low Tide
Sun -- 06:56 AM CDT     Sunrise
Sun -- 11:24 AM CDT     Moonrise
Sun -- 05:16 PM CDT     1.08 feet High Tide
Sun -- 07:53 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.20.10.10.10.10.20.30.40.50.70.80.90.911.11.11.1110.90.80.6

Tide / Current Tables for Port Lavaca, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Sun -- 01:03 AM CDT     Moonset
Sun -- 06:44 AM CDT     0.11 feet Low Tide
Sun -- 06:57 AM CDT     Sunrise
Sun -- 11:25 AM CDT     Moonrise
Sun -- 06:55 PM CDT     1.22 feet High Tide
Sun -- 07:54 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.50.40.30.20.10.10.10.20.30.50.60.70.911.11.21.21.21.21.21.11

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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