Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Port O'Connor, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:31AMSunset 8:18PM Thursday May 23, 2019 9:42 AM CDT (14:42 UTC) Moonrise 11:41PMMoonset 9:37AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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- 419 Am Cdt Thu May 23 2019
.small craft advisory in effect through Friday morning...
Today..Southeast winds around 20 knots. Bay waters choppy to rough. A slight chance of showers. Isolated Thunderstorms in the afternoon.
Tonight..Southeast winds around 20 knots. Bay waters choppy.
Friday..Southeast winds around 15 knots. Bay waters slightly choppy to choppy.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..Southeast winds 15 to 20 knots. Bay waters choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 419 Am Cdt Thu May 23 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Moderate onshore winds and elevated seas will persist for the next couple of days. Wind speeds and seas should generally diminish Saturday with more typical summer wind patterns with higher winds offshore at night that relax during the day. The pressure gradient will tighten back up again early next week with a corresponding increase of winds and seas.


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


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 230915
afdhgx
area forecast discussion
national weather service houston galveston tx
415 am cdt Thu may 23 2019

Discussion
Southeastern texas getting clipped by a central texas near 40
knot low level jet. Our regional morning 30 knot lower layer
winds have translated to 15 to 25 (gust 35) knot surface winds,
especially strongest across the coastal counties. These gusty
overnight winds have prompted a wind advisory for the immediate
coastline through 10 am. Water vapor imagery may be picking up on
a small weak disturbance moving into the northern reaches of the
mexican provinces of nuevo leon and tamaulipas. This disturbance
may work its way up into southern texas and reach our far western
zones around matagorda bay later this morning. If so, it may
provide enough lift within a conditionally unstable and highly
moist (near 1.7 inch pwat) environment surrounding matagorda bay
that, in tandem with a weakening low level 25 knot jet, to
initiate scattered showers and maybe that rogue thunderstorm.

Slight to low end chance pops for slowly north and eastern
propagating cells along and in the vicinity of the highway
59 interstate 69 corridor southwest of metro through the
afternoon. This will probably be the last mentionable chance for
rain in a week. Recently amped up winds will fall back to 10 to
15 knot magnitudes during the day, 5 to 10 knot overnight speeds.

Eastern upper ridging centered over the southeastern u.S. Is
forecast to expand westward in the coming days and overtake
eastern texas. Suppression with these higher heights are expected
to envelop the region and nil any appreciable rain chances through
mid next week. A trend towards relatively drier air moving in on
a general southerly steering flow will assist in ending this trend
of record high minimum temperatures; expect average lower to
middle 70 sunrise temperatures. Partially cloudy days will have
more Sun making it to the surface and warming many into the
slightly above normal lower 90s each subsequent day through the
period. Slightly lower humidity levels, per more sunshine
assisting in more efficient afternoon mixing, will keep heat
indices in the mean middle 90s, or a few degrees above ambient
afternoon temperatures through late may. Even though sub 100 heat
indices are forecast, it is important to bear in mind that early
warm season heat, with lessened air quality (as more Sun creates
higher levels of lower level ozone), can be a silent killer in
terms of heat-related stress and exhaustion. Limit afternoon
activities, stay shaded and hydrated and always check your
vechicle's backseat for the little ones. 31

Marine
Moderate onshore flow will persist today and tonight. Will keep the
current configuration of advsy flags in place, though the day shift
may be able to downgrade some locations to caution later today.

Overall trend should be for slightly lower winds seas as we head
into the weekend... Though marine conditions will probably be rougher
than we've seen the past several memorial day weekends which will
need to be taken into consideration given the high number of people
expected at area beaches and on the water.

Coastal flood advisory will continue along the gulf facing coast
today. Minor coastal flooding remains a possibility around times of
high tide. The more prone location will be the highway 87 124
intersection on bolivar today. Levels have been trending down the
past 24-36 hours. We may be able to make this the last
advisory... And transition to more of a beach hazards product
incorporating the primary issue of being the rip current risk for
the holiday weekend.

Winds seas build again early next week as the pressure gradient
tightens back up. 47

Aviation
Mix of MVFRVFR ceilings across the area early this morning. Should
transition into mostlyVFR this afternoon. There will probably be
some iso shra around, but not planning to include any vcsh wording
attm and let amendments take care of those if need be. Ceilings
should lower back down into MVFR territory this evening. 12z taf
package should look similar to what's already out. 47

Preliminary point temps pops
College station (cll) 91 75 92 74 91 10 0 0 0 0
houston (iah) 91 76 92 75 91 20 0 0 0 0
galveston (gls) 86 79 88 79 85 10 0 0 0 0

Hgx watches warnings advisories
Tx... Wind advisory until 10 am cdt this morning for the following
zones: brazoria islands... Chambers... Coastal brazoria...

coastal galveston... Coastal jackson... Coastal matagorda...

galveston island and bolivar peninsula... Matagorda islands.

Coastal flood advisory until 5 pm cdt this afternoon for the
following zones: brazoria islands... Galveston island and
bolivar peninsula... Matagorda islands.

Gm... Small craft advisory until 7 am cdt Friday for the following
zones: coastal waters from freeport to matagorda ship
channel tx out 20 nm... Coastal waters from high island to
freeport tx out 20 nm... Matagorda bay... Waters from
freeport to matagorda ship channel tx from 20 to 60 nm...

waters from high island to freeport tx from 20 to 60 nm.

Small craft advisory until 10 am cdt this morning for the
following zones: galveston bay.

Discussion... 31 47


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 0 mi48 min SE 20 G 24 80°F 82°F1013.9 hPa
MBET2 4 mi48 min S 21 G 24 80°F 1013.1 hPa
SDRT2 - 8773037 - Seadrift, TX 17 mi48 min SE 14 G 20 83°F 81°F1014.4 hPa
VCAT2 18 mi48 min SSE 21 G 25
AWRT2 26 mi48 min SSE 16 G 20 81°F 81°F1014.2 hPa
EMAT2 32 mi48 min ESE 14 G 18 80°F 81°F1014.2 hPa
KBBF 38 mi27 min SSE 18 81°F 75°F
KBQX 42 mi27 min SE 15 G 21 81°F 77°F
RCPT2 - 8774770 - Rockport, TX 45 mi48 min 82°F 1013.8 hPa
SGNT2 47 mi48 min SE 16 G 22 81°F 83°F1014.5 hPa

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX21 mi49 minSSE 15 G 239.00 miOvercast83°F75°F79%1014.5 hPa
Port Lavaca - Calhoun County Airport, TX21 mi47 minSSE 13 G 237.00 miOvercast83°F76°F79%1014.6 hPa

Wind History from PKV (wind in knots)
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Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Thu -- 03:23 AM CDT     -0.18 feet Low Tide
Thu -- 06:31 AM CDT     Sunrise
Thu -- 10:37 AM CDT     Moonset
Thu -- 03:32 PM CDT     0.91 feet High Tide
Thu -- 08:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0-0.1-0.2-0.2-0.1-00.10.30.40.60.70.80.80.90.90.90.90.80.80.70.60.50.4

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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GOES Local Image of SouthCentralPlains    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (10,2,3,4)
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Ground Weather Radar Station Corpus Christi, TX
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Gulf Stream Current


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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.