Thursday, August22, 2019 L-36.com


Marine Weather and Tides
Palacios, TX

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:55AMSunset 7:58PM Thursday August 22, 2019 4:31 AM CDT (09:31 UTC) Moonrise 11:23PMMoonset 12:04PM Illumination 58% Phase: Waning Gibbous; Moon at 21 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- 405 Am Cdt Thu Aug 22 2019
Today..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers in the morning. A slight chance of Thunderstorms. A slight chance of showers in the afternoon.
Tonight..Southeast winds 10 to 15 knots becoming south after midnight. Bay waters slightly choppy. A slight chance of showers and Thunderstorms after midnight. A chance of showers and Thunderstorms late.
Friday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. Showers likely and a slight chance of Thunderstorms in the morning, then a chance of showers and Thunderstorms in the afternoon.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers in the evening, then a chance of showers after midnight. A slight chance of Thunderstorms late.
Saturday..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of Thunderstorms in the morning. A chance of showers. A chance of Thunderstorms in the afternoon.
Saturday night..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms after midnight.
Sunday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 405 Am Cdt Thu Aug 22 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore flow will continue over the next few days, with slightly higher wind speeds during the overnight hours. Scattered showers and Thunderstorms will be possible through the weekend with the best coverage on Friday and Saturday. Winds and seas should slightly increase Friday as a surge of tropical moisture enters the northwestern gulf. No tropical development is expected at this time. Onshore flow continues for the start of next week as an upper level ridge remains over texas.


7 Day Forecast for Marine Location Near Palacios, TX
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location: 28.69, -96.39     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 220920
afdhgx
area forecast discussion
national weather service houston galveston tx
420 am cdt Thu aug 22 2019

Short term [today through Friday morning]
Goes nighttime microphysics rgb imagery not showing much low clouds
this morning or any cloud cover for that matter. Surface analysis
shows a weak pressure gradient with lower pressures over the plains
contributing to some moderate onshore flow. 500mb analysis at 00z
shows some slightly lower heights around 592dm over the area. Goes
derived precipitable water imagery does show 2" pwat just beyond the
60nm waters in the gulf which should move into SE texas later today
but will be slow to do so. Water vapor imagery shows a weak tutt low
in the western gulf with a broad area of weak convection to the east
of this trough. This is basically the tropical wave that is expected
to push towards the area on Friday into the weekend with an increase
in shower and thunderstorm activity.

For today however, convection will take it's time to initiate as
higher moisture advects into the region. Daytime heating and
convergence along the sea breeze will still be needed for storms to
form. Recent cams seem all on track with storms forming in the 15-
17z time frame along the coast and then pushing inland. Storms may
not get past a columbus to conroe line before dissipating in the
afternoon. Convection again should be ending in the 22z to 00z time
frame with little to no activity overnight. Like yesterday, since
shower and thunderstorm activity will be more isolated to widely
scattered, high temperatures will be in the mid upper 90s with low
90s along the coast. There is a chance there could be more scattered
activity along the coast that hold high temps down a little more but
rather error on the high side at this point. With breaks in the
clouds, it does not take much to heat the atmosphere given the
ridging aloft.

Overpeck

Long term [Friday morning through Wednesday]
The extended portion of the forecast remains on track, with better
coverage of showers and thunderstorms possible Friday through
Saturday, before the area of disturbed weather shifts east of se
tx. This upper level trough axis is still expected to bring a
surge of higher precipitable water values (pws) between 2.1 to 2.5
inches across the gulf waters and attempt to advect inland over
the coastal counties. North of i-10, pws drop off significantly,
with the college station forecast soundings showing pws on Friday
and Saturday closer to 1.8 to 1.9 inches. Forecast soundings also
remain uncapped along the coast, with an inverted v profile
indicative of potentially gusty winds beneath any stronger storms
that develop. Little has changed in terms of rainfall accumulations,
with 1 to 2 inches total possible from columbus to conroe and
southward through the Thursday to early Sunday time frame.

Rainfall totals closer to 2 inches will be possible along the
coast.

Global guidance has flip flopped compared to last night's
solutions, with GFS moving the better moisture east of SE tx faster
than the nam12. The GFS builds the upper level ridge back in over
the region, edging in from the west Sunday morning, while the
ecmwf and nam12 lag behind in strength and timing by about 12
hours. Forecast soundings also show a cap of drier air in the
900-850mb layer on Sunday which should help to suppress overall
coverage. Therefore Sunday into the first half of the week looks
to be more of a typical summertime like pattern with pws less than
2.0 inches and development more likely to occur along the sea bay
breezes. Otherwise, high temperatures should remain in the 90s
with low temperatures in the mid 70s to low 80s over the next
week.

Hathaway

Aviation [06z TAF issuance]
Quiet tonight withVFR conditions prevailing. Increasing moisture
from the gulf these next couple of days should translate to a bit
more development by the afternoon. Showers forming over the near-
shore waters overnight early thur will be making their way inland
through the day... With activity likely peaking with daytime heat-
ing. Did keep the mention of vcts for sites south of iah tomorrow
but may have to be revisited for Fri if model trends continue. As
it has been of late, showers thunderstorms should wane by evening.

41

Marine
Moderate onshore flow will continue for the end of the week. We are
tracking a tropical wave now over the western gulf that is expected
to move towards the upper tx coast tomorrow into Saturday. This may
cause a brief increase in winds and seas that could at most reach
scec criteria before decreasing into Sunday. Again latest model
guidance shows no tropical development from this system.

Overpeck

Preliminary point temps pops
College station (cll) 99 77 96 76 97 10 10 30 10 20
houston (iah) 95 78 92 78 94 40 20 60 20 50
galveston (gls) 91 82 92 84 93 40 50 80 60 60

Hgx watches warnings advisories
Tx... None.

Gm... None.

Short marine... Overpeck
long... 08


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 12 mi56 min SSE 9.9 G 12 83°F 85°F1013.1 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi56 min SSE 13 G 16 84°F 88°F1012.6 hPa
MBET2 19 mi56 min S 13 G 16 85°F 1011.9 hPa
EMAT2 25 mi44 min SE 8.9 G 13 84°F 88°F1012.8 hPa
SDRT2 - 8773037 - Seadrift, TX 26 mi56 min ESE 8.9 G 11 85°F 86°F1013.1 hPa
AWRT2 39 mi56 min SSE 8.9 G 12 85°F 87°F1013.1 hPa
SGNT2 41 mi44 min SSE 12 G 15 85°F 87°F1013 hPa
KBQX 48 mi37 min SE 7 G 13 86°F 77°F

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX8 mi39 minno data10.00 miFair85°F75°F72%1013.1 hPa
Port Lavaca - Calhoun County Airport, TX16 mi37 minSE 410.00 miFair81°F77°F88%1013.2 hPa

Link to 5 minute data for KPSX

Wind History from PSX (wind in knots)
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Last 24hr--S6S6S6----S7S8S7
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1 day agoS10--S5CalmS4S6S8S9S11S9S8S9
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2 days ago--S9S7S8S4S13--S10S11--S11--S10S13S13
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Tide / Current Tables for Port Lavaca, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Thu -- 06:43 AM CDT     0.64 feet High Tide
Thu -- 06:59 AM CDT     Sunrise
Thu -- 01:04 PM CDT     Moonset
Thu -- 07:58 PM CDT     Sunset
Thu -- 08:01 PM CDT     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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 -- 06:58 AM CDT     Sunrise
Thu -- 07:03 AM CDT     0.53 feet High Tide
Thu -- 01:03 PM CDT     Moonset
Thu -- 05:02 PM CDT     0.14 feet Low Tide
Thu -- 07:57 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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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Wind Forecast for Houston/Galveston, TX (5,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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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.