Monday, December11, 2017 L-36.com


Marine Weather and Tides
Matagorda, 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 7:06AMSunset 5:28PM Monday December 11, 2017 4:33 PM CST (22:33 UTC) Moonrise 1:07AMMoonset 1:37PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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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GMZ350 Coastal Waters From Freeport To The Matagorda Ship Channel Out 20 Nm- 315 Pm Cst Mon Dec 11 2017
.small craft should exercise caution...
Tonight..West winds around 10 knots becoming 10 to 15 knots after midnight. Seas 1 to 2 feet.
Tuesday..North winds 15 to 20 knots. Seas 2 to 3 feet.
Tuesday night..North winds 10 to 15 knots. Seas 2 to 3 feet.
Wednesday..Northeast winds 5 to 10 knots becoming south in the afternoon. Seas 1 to 2 feet.
Wednesday night..Southwest winds 5 to 10 knots. Seas 1 foot.
Thursday..West winds 5 to 10 knots. Seas 1 foot.
Thursday night..Northwest winds 15 to 20 knots becoming north after midnight. Seas 2 to 3 feet building to 3 to 5 feet after midnight.
Friday..North winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Seas 2 to 4 feet.
Friday night..Northeast winds 5 to 10 knots becoming southeast after midnight. Seas 1 to 2 feet.
Saturday..South winds 10 to 15 knots. Seas 2 to 4 feet.
Saturday night..South winds 15 to 20 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. A slight chance of showers.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 315 Pm Cst Mon Dec 11 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Westerly winds will veer to the northwest and north toward Sunrise Tuesday with a cold frontal passage. Offshore winds will strengthen to caution levels. Winds quickly relax Wednesday as high pressure spreads over the area. A stronger cold front arrives Thursday night or early Friday with advisory conditions expected Friday.

7 Day Forecast for Marine Location Near Matagorda, TX
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location: 28.69, -95.88     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 112136
afdhgx
area forecast discussion
national weather service houston galveston tx
336 pm cst Mon dec 11 2017

Near term [through tonight]
Visible satellite imagery shows some high cloud streaming across
the brazos valley into east texas this afternoon. At the surface,
west to southwest winds remain light with temperatures in the
low mid 70s. With dewpoints in the low 30s, relative humidity
levels are quite low from the upper teens to upper 20 percent.

Certainly a nice day to be outside and enjoy for december.

Tonight a cold front located over the southern plains at 21z
should push through the area after midnight and off the coast by
12-13z Tuesday. Overall the front will be relatively unnoticed
with winds turning northerly with re-enforcing cooler drier air.

Short term [Tuesday through Wednesday night]
High pressure will settle over the area Tuesday and move east
Tuesday night. By Wednesday some weak southwest boundary layer
flow develops ahead of another approaching front over the plains.

Forecast looks on track for this time periods with temperatures
close to near normal or maybe a couple degrees below for minimum
temperatures.

Long term [Thursday through Monday]
Upper level pattern remains progressive through the end of the
week with northwest flow aloft through the plains. A strong trough
moves through the area on Friday with a weak cold front pushing
through during this time. Return flow from the gulf does set up
Saturday into Sunday with the GFS developing quite a bit of
precipitation along a front for Sunday. The ECMWF cmc are both
dry with the front and so the forecast will go with some 20 pops
during this time frame leaning more on the ECMWF cmc solutions
than the gfs. GFS wants to increase precipitable water values up
to 1.7 to 1.8 inches by Sunday. This seems really aggressive
given only 24 hours of return flow and the flow is more from the
southwest coming from south texas, hardly a source of moisture.

Ecmwf cmc do produce some shower activity but most of it will be
to the east and southeast of the area. High pressure then builds
over texas early next week behind the front and on the back side
of a departing trough.

Overpeck

Aviation [18z TAF issuance]
Vfr. Westerly winds today may briefly back to the southwest ahead
of the cold front. Cold front with increasing northerly winds coming
through 06z cll area and iah hou 09-10z and gls by 11-12z.

45

Marine
Scec conditions developing toward morning and continuing
throughout the day Tuesday over the gulf waters in the wake of the
early morning cold front. Winds relax Tuesday night early
Wednesday as high pressure slides into and through the upper texas
coastal waters by Wednesday night. Another cold front on it's
heels and should move off the coast Thursday evening and scec to
sca conditions in the wake of the front. Thursday night tailing
off by Friday night. Strengthening onshore flow as next system
drops into the eastern u.S. Trough with increasing chances for
showers Saturday into Sunday. At this the third front in this
point next front should package hits the waters Sunday night.

45

Preliminary point temps pops
College station (cll) 41 62 35 64 42 0 0 0 0 10
houston (iah) 44 63 37 62 44 0 0 0 0 10
galveston (gls) 52 63 46 60 53 0 0 0 0 10

Hgx watches warnings advisories
Tx... None.

Gm... Small craft should exercise caution from late tonight through
Tuesday evening 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... Waters from freeport to the matagorda ship channel
from 20 to 60 nm... Waters from high island to freeport from
20 to 60 nm.

Near term... Overpeck
short term... Overpeck
long term... Overpeck
aviation... 45
marine... 45
fire weather... 45


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EMAT2 2 mi46 min SSW 8 G 9.9 1022.3 hPa
SGNT2 15 mi46 min SW 8 G 9.9 62°F 56°F1022.5 hPa
KBQX 29 mi39 min WSW 12 64°F 45°F
MBET2 30 mi46 min SW 11 G 13 63°F 56°F1021.8 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 32 mi46 min SW 8 G 9.9 63°F 55°F1022.9 hPa
FCGT2 - 8772447 - USCG Freeport, TX 35 mi46 min SSW 8.9 G 9.9 64°F 60°F1023.1 hPa
VCAT2 39 mi46 min SSW 7 G 11 68°F 58°F1022.6 hPa
KBBF 44 mi39 min
LUIT2 48 mi94 min 54°F
SDRT2 - 8773037 - Seadrift, TX 48 mi46 min S 8.9 G 9.9 60°F 58°F1023.3 hPa

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay City, Bay City Municipal Airport, TX20 mi59 minSW 710.00 miFair72°F37°F29%1023 hPa
Palacios Municipal Airport, TX20 mi41 minS 910.00 miFair65°F48°F56%1022.9 hPa

Wind History from BYY (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalmSW4SW4W5W6SW5SW6SW8SW4
1 day agoNW4W3CalmCalmCalmCalmCalmCalmCalmN3CalmN4N3CalmCalmCalmCalmCalmCalmCalmCalmNW5CalmNW3
2 days agoNW4CalmCalmCalmCalmS4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5NW7NW4NW7NW10NW9NW10N8

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Mon -- 01:09 AM CST     Moonrise
Mon -- 01:33 AM CST     0.58 feet High Tide
Mon -- 07:07 AM CST     Sunrise
Mon -- 09:32 AM CST     0.36 feet Low Tide
Mon -- 11:12 AM CST     0.37 feet High Tide
Mon -- 01:38 PM CST     Moonset
Mon -- 05:19 PM CST     0.31 feet Low Tide
Mon -- 05:29 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.60.50.50.40.40.40.40.40.40.40.40.40.40.30.30.30.30.30.40.40.50.5

Tide / Current Tables for Pass Cavallo, Texas
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Pass Cavallo
Click for Map
Mon -- 01:09 AM CST     Moonrise
Mon -- 04:49 AM CST     0.42 feet Low Tide
Mon -- 07:07 AM CST     Sunrise
Mon -- 11:25 AM CST     0.85 feet High Tide
Mon -- 01:38 PM CST     Moonset
Mon -- 03:49 PM CST     0.45 feet Low Tide
Mon -- 05:30 PM CST     Sunset
Mon -- 11:34 PM CST     1.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.90.70.60.50.40.50.50.60.70.80.80.80.70.60.50.40.50.50.60.80.911.1

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 (17,4,5,8)
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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.