Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Port O'Connor, TX

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:48AMSunset 8:02PM Thursday April 27, 2017 1:49 PM CDT (18:49 UTC) Moonrise 6:57AMMoonset 8:32PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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-galveston Bay- 1031 Am Cdt Thu Apr 27 2017
This afternoon..Northeast winds 10 to 15 knots becoming southeast late. Bay waters slightly choppy.
Tonight..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Friday..South winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Bay waters slightly choppy becoming choppy in the afternoon.
Friday night..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers after midnight.
Saturday..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and isolated Thunderstorms in the morning. A chance of showers and Thunderstorms in the afternoon.
Saturday night..South winds 15 to 20 knots becoming east after midnight. Bay waters choppy. A slight chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Sunday..North winds 15 to 20 knots becoming northwest in the afternoon. Bay waters choppy. A chance of showers and Thunderstorms in the morning.
Sunday night..Northwest winds 10 to 15 knots becoming north 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Monday..Southwest winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Monday night..Southeast winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1031 Am Cdt Thu Apr 27 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Offshore winds will continue to weaken this afternoon as high pressure drifts east of the region. Onshore winds return tonight and will strengthen through Saturday.

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 271745
afdhgx
area forecast discussion
national weather service houston/galveston tx
1245 pm cdt Thu apr 27 2017

Aviation
No issues for the rest of this afternoon into the evening hours.

The light offshore low-level flow is continuing to veer back to
the SE across the region at present, but not expecting a lot of
changes with this fairly dry airmass until late tonight through
early tomorrow morning. Increasing onshore wind speeds and low-
level moisture under the strong cap will help to produce spotty
ifr CIGS (but mainly MVFR cigs) through mid Fri morning. Cannot
rule out some very isolated waa-type shras during this time but
will leave wording out for now. Looking for bknVFR CIGS by to-
morrow afternoon. 41

Prev discussion /issued 1001 am cdt Thu apr 27 2017/
surface analysis and visible satellite imagery show cold front in
the gulf of mexico from the mississippi river delta to south of
brownsville tx. Overall the forecast looks on track and only
updated t/td for ongoing trends which were minor adjustments. For
the afternoon update may have to look at adding fog as moisture
returns tonight with the front in the gulf returning as a warm
front. We are still looking at the possibility of strong/severe
storms and locally heavy rainfall Saturday night. There should be
some minor changes in the forecast for that time frame especially
with timing. Cold front looks to out run upper level support so
looking at large scale lift out of phase with surface forcing.

Usually means a nocturnal squall line that fights capping and the
lack of instability.

Overpeck

Preliminary point temps/pops
College station (cll) 82 67 91 75 86 / 0 10 10 20 40
houston (iah) 84 69 90 77 84 / 0 10 10 20 40
galveston (gls) 76 72 83 77 81 / 0 10 10 20 20

Hgx watches/warnings/advisories
Tx... None.

Gm... Small craft should exercise caution until 1 pm cdt this
afternoon for the following zones: waters from freeport to
the matagorda ship channel from 20 to 60 nm... Waters from
high island to freeport from 20 to 60 nm.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 0 mi49 min E 12 G 16 71°F 1008.4 hPa (-0.8)
MBET2 4 mi49 min ESE 14 G 16 70°F
SDRT2 - 8773037 - Seadrift, TX 17 mi49 min ENE 6 G 13 75°F 75°F1008.6 hPa (-1.0)
VCAT2 18 mi49 min E 13 G 15 69°F 73°F1008.8 hPa (-0.8)
AWRT2 26 mi49 min E 9.9 G 12 73°F 74°F1008.6 hPa (-1.0)
EMAT2 32 mi49 min ENE 15 G 18 70°F 76°F1008.3 hPa (-1.0)
KBBF 38 mi34 min ESE 13 G 18 73°F 63°F
MAXT2 - Mission-Aransas Reserve, TX 40 mi49 min 8 73°F 1009 hPa (-1.0)63°F
CPNT2 40 mi49 min E 7 G 9.9 73°F 75°F
KBQX 42 mi34 min E 7 G 17 72°F 72°F
RCPT2 - 8774770 - Rockport, TX 45 mi49 min ESE 6 G 9.9 74°F 75°F1008.3 hPa (-1.2)
SGNT2 47 mi49 min E 12 G 17 70°F 77°F1008.7 hPa (-0.8)

Wind History for Port OConnor, TX
(wind in knots)    EDIT      (on/off)   Help
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SE19
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SE8
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX21 mi54 minESE 10 G 1410.00 miFair74°F61°F67%1009.5 hPa
Palacios Municipal Airport, TX21 mi56 minESE 1410.00 miFair77°F53°F43%1008.7 hPa

Wind History from PKV (wind in knots)
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Last 24hrCalmCalmW7
G15
NW12
G19
NW13
G18
NW14
G20
NW7
G19
CalmCalmCalmN12
G19
N13
G21
NE12
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NE12N11
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NE8NE7CalmNE10
G14
CalmE7E14E11
G16
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1 day agoS15
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SW4Calm
2 days agoCalmSE3E10
G16
S5S4
G14
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CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS9S14
G19
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S16
G21

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Thu -- 06:48 AM CDT     Sunrise
Thu -- 07:57 AM CDT     Moonrise
Thu -- 10:20 AM CDT     0.96 feet High Tide
Thu -- 07:58 PM CDT     Sunset
Thu -- 09:31 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.20.30.40.50.60.80.80.90.9110.90.90.90.90.90.80.70.60.50.40.30.2

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Thu -- 03:16 AM CDT     0.39 feet Low Tide
Thu -- 06:48 AM CDT     Sunrise
Thu -- 07:58 AM CDT     Moonrise
Thu -- 01:55 PM CDT     1.29 feet High Tide
Thu -- 07:59 PM CDT     Sunset
Thu -- 09:32 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.40.40.50.60.70.911.11.21.31.31.31.31.31.21.21.21.110.90.8

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Houston/Galveston, TX (14,3,4,5)
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Ground Weather Radar Station Corpus Christi, TX
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weather_mapweather_map weather_map

Gulf Stream Current


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Disclaimer:
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.