Monday, December11, 2017 L-36.com


Marine Weather and Tides
Seabrook, 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 7:04AMSunset 5:23PM Monday December 11, 2017 3:19 AM CST (09:19 UTC) Moonrise 1:03AMMoonset 1:33PM Illumination 46% 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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GMZ335 Matagorda Bay-galveston Bay- 935 Pm Cst Sun Dec 10 2017
Tonight..West winds 5 to 10 knots. Bay waters smooth.
Monday..West winds 5 to 10 knots. Bay waters smooth.
Monday night..Southwest winds 5 to 10 knots becoming northwest 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
Tuesday..North winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday night..North winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Wednesday..Northeast winds 5 to 10 knots becoming south in the afternoon. Bay waters smooth.
Wednesday night..South winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth.
Thursday..West winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Thursday night..North winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
Friday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Friday night..North winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 935 Pm Cst Sun Dec 10 2017
Synopsis for high island to matagorda ship channel out 60 nm.. The next cold front is still forecast to move into the coastal waters early Tuesday morning with generally moderate offshore winds developing in its wake. Another cold front is also forecast to move into the area Thursday and should help to keep a light offshore flow in place during the latter part of the week.

7 Day Forecast for Marine Location Near Seabrook, TX
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location: 29.61, -94.98     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 110505
afdhgx
area forecast discussion
national weather service houston galveston tx
1105 pm cst Sun dec 10 2017

Aviation
Surface high pressure will bring generally light winds to the
area tonight. Cirrus will continue to stream over the region and
could thicken a bit late Monday morning before scattering back out
toward evening.VFR conditions expected for the next 30 hours. 43

Prev discussion issued 735 pm cst Sun dec 10 2017
update...

current forecast remains on track with only minor updates made to
hourly temperatures and dew points based on observational trends.

Mostly clear skies and light winds will result in temperatures
falling into the mid 30s to lower 40s inland and mid 40s along the
coast.

Huffman
prev discussion... Issued 243 pm cst Sun dec 10 2017
discussion...

the surface ridge currently located just west over central texas
will remain in place through the beginning of next week, keeping
winds mainly out of the west. This should allow high temperatures
for Monday to once again reach into the upper 60s along the coast
to low 70s further inland. This area of high pressure will begin
to weaken late Monday before the tail end of a weak cold front
swings through the region Tuesday. This front should be a dry one,
and will only act to lower high temperatures by five to ten
degrees, leaving Tuesday's high temps in the low 60s. Ridging
again builds in behind this weak front early Wednesday. Winds will
turn back onshore, allowing moisture to return. Forecast sounding
show pws rising from 0.30 inches to just over a half inch by
Thursday afternoon.

Our next best chance for rain does come until the end of next week.

Late Thursday into Friday, the GFS and ECMWF model solutions begin
to diverge. The ECMWF shows upper level low pressure over the baja
peninsula weakening enough to allow a shortwave to dive into
southern texas, bringing with it enough lift to produce a large
swath of precipitation out ahead of the trough axis. This
precipitation would set up mainly over the coast and northwestern
gulf of mexico, before quickly pushing eastward as the axis swings
through the region. This chance for rain would begin as early as
late Thursday and carry through Friday. The GFS however, keeps
this shortwave much further north of SE tx and as a result, keeps
most of the precipitation well to the east over the north and
northeastern sections of the gulf of mexico. Therefore, decided to
carry a chance for showers over the offshore waters late Thursday
into Friday morning to account for the possibility of this
shortwave digging closer to SE tx, but overall trending towards
the GFS solution based on its overall consistency between model
runs.

Hathaway
marine...

as high pressure continues to move off to the east, light W SW winds
will be developing across the coastal waters tonight and tomorrow.

A cold front remains on track to move into SE tx late Mon night
but is not expected to reach the marine areas until early tues
morning. The generally moderate offshore winds developing in the
wake of the cold front could produce a brief period of scec
conditions late tues morning early afternoon. Wind speeds are
expected to decrease late tues night then slowly shifting to the
s SW once again on weds. This very active pattern is pushing
another cold front into the coastal waters thurs night... With
strong offshore winds developing on fri. Scec SCA flags will be
possible at that time. 41

Preliminary point temps pops
College station (cll) 39 73 43 61 37 0 0 0 0 0
houston (iah) 40 72 45 63 39 0 0 0 0 0
galveston (gls) 50 70 52 63 48 0 0 0 0 0

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 14
aviation marine... 43


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 5 mi49 min WSW 5.1 G 7 49°F 57°F1027.1 hPa
EPTT2 - 8771013 - Eagle Point, TX 10 mi49 min W 5.1 G 8 47°F 54°F1027.3 hPa
NCHT2 - 8770777 - Manchester, TX 17 mi49 min W 1 G 2.9 46°F 58°F1026.4 hPa
GRRT2 22 mi49 min 48°F 51°F1027.5 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 22 mi49 min WSW 9.9 G 11 56°F1026.8 hPa
GTOT2 23 mi49 min WSW 6 G 8 50°F 57°F1026.5 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi49 min WSW 6 G 7 47°F 52°F1027.2 hPa
KXIH 38 mi24 min 59°F 45°F
LUIT2 38 mi79 min 62°F
42035 - GALVESTON 22NM East of Galveston, TX 40 mi89 min W 9.7 G 12 59°F 60°F1 ft1027.6 hPa (-0.9)46°F
FCGT2 - 8772447 - USCG Freeport, TX 49 mi49 min WSW 7 G 8 51°F 60°F1027.7 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi89 minWSW 310.00 miA Few Clouds46°F37°F71%1028.1 hPa
Houston, Pearland Regional Airport, TX15 mi26 minN 010.00 miFair39°F37°F93%1027.7 hPa
Houston, Houston Hobby Airport, TX16 mi26 minSW 410.00 miFair39°F37°F93%1027.5 hPa
John Dunn Helistop, TX23 mi24 minWSW 1110.00 miFair50°F33°F54%1026.4 hPa
Galveston, Scholes Field, TX24 mi27 minVar 310.00 miFair48°F42°F80%1027.5 hPa

Wind History from EFD (wind in knots)
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Last 24hrCalm--CalmCalmCalmCalmCalmCalmCalmW4CalmCalmNW5W5W5CalmW4SW3S3S3S5SW3CalmSW3
1 day agoCalmCalm--CalmCalmCalm--Calm--SW3CalmNW10W9W7--W3CalmCalmCalmCalmCalmCalmNW4--
2 days agoN12N10NW12N5N4NW9NW10NW10NW11NW10NW10NW10NW7NW5NW5CalmCalmE3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Mon -- 01:02 AM CST     Moonrise
Mon -- 03:47 AM CST     0.83 feet High Tide
Mon -- 07:05 AM CST     Sunrise
Mon -- 10:45 AM CST     0.13 feet Low Tide
Mon -- 01:32 PM CST     Moonset
Mon -- 04:27 PM CST     0.48 feet High Tide
Mon -- 05:21 PM CST     Sunset
Mon -- 09:34 PM CST     0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.60.70.80.80.80.70.50.40.20.10.10.20.30.30.40.50.50.40.40.30.20.20.3

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Mon -- 01:02 AM CST     Moonrise
Mon -- 02:53 AM CST     -0.00 knots Slack
Mon -- 07:02 AM CST     -1.12 knots Max Ebb
Mon -- 07:03 AM CST     Sunrise
Mon -- 10:39 AM CST     0.00 knots Slack
Mon -- 12:39 PM CST     0.37 knots Max Flood
Mon -- 01:31 PM CST     Moonset
Mon -- 03:03 PM CST     -0.00 knots Slack
Mon -- 05:21 PM CST     Sunset
Mon -- 06:29 PM CST     -0.48 knots Max Ebb
Mon -- 08:57 PM CST     0.00 knots Slack
Mon -- 11:50 PM CST     0.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.80.4-0-0.4-0.8-1-1.1-1-0.7-0.20.10.30.40.20-0.2-0.4-0.5-0.5-0.300.40.7

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 (4,6,7,8)
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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.