Friday, December15, 2017 L-36.com


Marine Weather and Tides
Palacios, TX

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:09AMSunset 5:29PM Friday December 15, 2017 8:08 AM CST (14:08 UTC) Moonrise 4:46AMMoonset 4:02PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 420 Am Cst Fri Dec 15 2017
.small craft advisory in effect until 9 am cst this morning...
Today..North winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon. A chance of showers in the morning. A slight chance of showers in the afternoon.
Tonight..Northeast winds 5 to 10 knots. Bay waters smooth.
Saturday..East winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers in the morning, then a chance of showers and isolated Thunderstorms in the afternoon.
Saturday night..East winds 15 to 20 knots becoming west after midnight. Bay waters choppy. Showers likely and isolated Thunderstorms.
Sunday..North winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms in the morning, then a slight chance of showers and Thunderstorms in the afternoon.
Sunday night..Southeast winds 5 to 10 knots becoming east after midnight. Bay waters smooth. A slight chance of showers.
Monday..Northeast winds 5 to 10 knots. Bay waters smooth. A chance of showers.
Monday night..Northwest winds 5 to 10 knots becoming north 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A chance of showers.
Tuesday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon. A slight chance of showers.
Tuesday night..Northeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 420 Am Cst Fri Dec 15 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Strong north winds and elevated seas will prevail across much of the coastal waters today...with conditions slowly improving through the day from the north as high pressure builds into the region. A coastal trough will develop across the mid and lower texas coast on Saturday before moving northeasterly up the coast Saturday night. Expect unsettled weather as this occurs with increasing winds, building seas, showers or Thunderstorms, and some sea fog. This disturbance will push east of the area Sunday bringing an end to the rain...but periods of fog will remain a possibility until the next front pushes through on Tuesday.

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 151109
afdhgx
area forecast discussion
national weather service houston galveston tx
509 am cst Fri dec 15 2017

Discussion
Cold front has pushed well offshore this morning. Radar indicates
areas of -ra streaming near off the coast in association with
some impulses embedded in the messy flow aloft. Other than some
locations south of i-10 & closest to the coast, i'd anticipate a
mostly dry day.

Surface high pressure moves off to the east later tonight. Expect
a coastal trof low to begin developing along the lower & middle
texas coast as this occurs. Further aloft, the upper trof currently
near baja will make its way ewd over cntl mexico, begin filling
and eject northeast across cntl and NE tx Sat night. Look for
precip coverage to begin expanding across southeast texas later
Saturday afternoon in association with the increase in large scale
lift.

Low level jet ramps up to 40-50kt, pw's increase to 1.5-1.8" east
of the highway 69 59 corridor and the region becomes situated
near the rrq of a 120kt jet by Saturday night. Forecast soundings
show very impressive turning in the llvls and helicity values... But
a significant inversion & lack of instability will be limiting
factors for widespread severe wx. That being said, we'll need to
closely monitor the eventual track of the surface coastal low and
whether the warm sector makes its way inland or not as
spinning tornadic cells could be a possibility. Models have been
showing some run-to-run differences as of late, but for now, are
in general agreement that could occur roughly along a matagorda
bay-liberty line. Otherwise... The primary issue will be some
moderate to occasionally heavy december rain with pw's nearing
close to 2 standard deviations above norms.

The bulk of precip will be pushing off to the east by early Sunday
morning with a trailing moisture axis lingering near and off the
coast. By Sunday evening onshore winds will resume and transport
some of this moisture and showers back inland through Monday.

(would also expect some sea fog to develop away from precip
areas).

Forecast becomes more uncertain Mon night-wed. GFS & cmc swing the
next trof and associated sfc front thru late Monday... Effectively bringing
an end to rain chances Monday night. ECMWF on the other hand is less
progressive with the trof and keeps rain fog chances going well into
the middle of next week. In general, the fcst has been more in line
w GFS reasoning as of late, but did nudge pops up a touch Tue and
wed in case ECMWF is onto something.

A strong cold front is penciled in for next Friday. 47

Marine
Strong offshore winds (and building seas) will prevail this morning
across the bays coastal waters early this morning (in the wake of a
cold front last night). As high pressure builds into the area (from
the north), we should begin to see the gradient weaken and winds de-
crease through the rest of the morning from the north. The offshore
waters will remain under SCA flags through the afternoon.

Winds to veer to the E then SE by Sat as the forecast calls for the
development of a coastal trof low off of the lower middle tx coast.

This system is then expected to eventually track NE up the coast...

bringing unsettled weather to the area Sat night in the form of ele-
vated winds seas, strong storms and possibly sea fog. Conditions to
improve Sun as this disturbance pushes east of the region. However,
sea fog could return to the bays nearshore waters late Sun and then
persist through Mon (ahead of the next cold front on tues). 41

Aviation
GenerallyVFR conditions expected for this next TAF cycle with high
pressure prevails across the region. High clouds and perhaps brief
periods of gusty winds for coastal sites should be the main issues.

41

Preliminary point temps pops
College station (cll) 59 39 55 46 67 0 0 40 90 10
houston (iah) 57 41 57 50 68 10 0 30 80 20
galveston (gls) 56 48 59 56 65 30 0 30 70 30

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory until 9 am cst this morning for the
following zones: galveston bay... Matagorda bay.

Small craft advisory until 2 pm cst this afternoon for the
following zones: coastal waters from freeport to the
matagorda ship channel out 20 nm... Coastal waters from high
island to freeport out 20 nm.

Small craft advisory until 6 pm cst this evening 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
VCAT2 12 mi50 min N 12 G 15 49°F 55°F1023.3 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi50 min N 20 G 23 51°F 54°F1022.9 hPa
MBET2 19 mi50 min NNE 19 G 24 50°F 58°F1021.3 hPa
EMAT2 25 mi56 min NNW 9.9 G 12 47°F 57°F1021.9 hPa
SDRT2 - 8773037 - Seadrift, TX 26 mi50 min NNW 8.9 G 12 48°F 57°F1023.3 hPa
AWRT2 39 mi50 min N 14 G 19 49°F 56°F1022.7 hPa
SGNT2 41 mi50 min NNW 5.1 G 6 47°F 51°F1022 hPa
KBQX 48 mi33 min N 28 52°F 43°F

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX8 mi75 minN 1310.00 miLight Rain48°F39°F71%1022.6 hPa
Port Lavaca - Calhoun County Airport, TX16 mi88 minN 1110.00 miLight Rain48°F37°F68%1023 hPa

Wind History from PKV (wind in knots)
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Last 24hrNE3NE3NE4E3CalmNE4E3--CalmN4NE5NE4N4N7N5N5N7N11N12
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1 day agoCalmCalmCalmCalmS4CalmSW3S4S6S3SE4SE4S5S5S3S3S4W4SW4CalmCalmNW3CalmN3
2 days agoN4N11N12
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N10N9N9N7N5NW4N5N6N4CalmCalmNW3N3CalmN3NW3CalmNW3

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Fri -- 04:46 AM CST     Moonrise
Fri -- 07:11 AM CST     Sunrise
Fri -- 12:25 PM CST     -0.38 feet Low Tide
Fri -- 04:02 PM CST     Moonset
Fri -- 05:31 PM CST     Sunset
Fri -- 10:36 PM CST     0.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.50.50.50.40.40.30.20-0.1-0.2-0.3-0.4-0.4-0.3-0.2-00.10.30.40.50.60.60.6

Tide / Current Tables for Port Lavaca, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Fri -- 04:46 AM CST     Moonrise
Fri -- 07:11 AM CST     Sunrise
Fri -- 12:41 PM CST     -0.08 feet Low Tide
Fri -- 04:02 PM CST     Moonset
Fri -- 05:31 PM CST     Sunset
Fri -- 10:30 PM CST     0.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.80.70.70.60.60.50.30.20.1-0-0.1-0.1-00.10.20.40.50.70.80.90.90.9

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 (9,2,3,4)
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Ground Weather Radar Station Houston/Galveston, 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.