Marine Weather and Tides
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 6:21AM||Sunset 8:25PM||Monday June 26, 2017 5:16 PM CDT (22:16 UTC)||Moonrise 8:09AM||Moonset 9:53PM||Illumination 8%|
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|GMZ335 Matagorda Bay-galveston Bay- 334 Pm Cdt Mon Jun 26 2017 |
Tonight..East winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A chance of showers and Thunderstorms.
Tuesday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A chance of showers and Thunderstorms.
Tuesday night..Southeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A chance of showers and Thunderstorms.
Wednesday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Wednesday night..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Thursday..South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A chance of showers and Thunderstorms.
Thursday night..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..South winds 10 to 15 knots. Bay waters slightly choppy.
Saturday night..South winds 10 to 15 knots. Bay waters slightly choppy.
|GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 334 Pm Cdt Mon Jun 26 2017 |
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds will increase late in the week as an area of low pressure moves across the central plains. Periods of showers and Thunderstorms will affect the coastal waters through Friday with a gradual decrease in activity toward the weekend.
7 Day Forecast for Marine Location Near Clear Lake Shores, TXHourly EDIT Help
Area Discussion for - Houston/Galveston, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus64 khgx 262041|
area forecast discussion
national weather service houston galveston tx
341 pm cdt Mon jun 26 2017
Showers and thunderstorms across the CWA this evening are
continuing to develop off of outflow from preexisting storms.
Lower pws in the northern counties of the cwa, with drier
conditions indicated on the low to mid level water vapor satellite
imagery, will hinder the development of showers and thunderstorms
this evening. Although with temperatures already in the upper
80s, diurnal development will still be possible as we approach
maximum temperatures late this afternoon.
Low temperatures tonight will be around normal for this time of
year, dropping down into the lower 70s further inland near college
station and upper 70s near galveston. The hrrr and rap place the
best chance of showers and thunderstorms over the coast earlier in
the evening, and eventually moving over the near and offshore
waters overnight. Rap and hrrr have been initializing fairly well
in terms of the placement of these showers, so trended the pops to
match for this evening.
At 500 mb, an area of high pressure continues to slide in from
the west as we move into Tuesday, but should recede back by
Tuesday night. An upper level low pressure system will form aloft
over SE tx Wednesday morning, and could act as a forcing mechanism
to provide some lift along with additional lift being provided by
daytime heating. Global models such as the ECMWF and GFS also
indicate widespread coverage of showers and thunderstorms
beginning Tuesday 12z-18z. Therefore, expecting a larger coverage
area for shower and thunderstorms Tuesday. Again, pws will rise
towards 1.8 inches and our convective temperatures will range
between 86 to 88 degrees. High temperatures Tuesday will rise back
into the upper 80s to lower 90s, so the convective temperature
should be easily reached. GFS also hinted at moving a swath of
higher values of vorticity into the area between 12z-18z, which
could also aid in providing additional lift.
Wednesday, shows a similar pattern with afternoon precip
expected, but global models are picking up on a small bullseye of
a little over an inch precip accumulation moving across our
offshore to nearshore waters, and eventually migrating east of our
cwa. Pops will be similar to Tuesdays with coverage more
widespread in the afternoon. High temperatures will again warm|
into the upper 80s lower 90s.
An upper weakness over texas will be dragged towards the northwest
gulf on Wednesday by a trough swinging across the eastern us,
resulting in nearly persistent daytime rain chances across inland
areas Wednesday through Friday with activity shifting into the
gulf during the overnight hours. With precipitable water values
hovering in the 1.8-2 inch range, brief heavy rain will be
possible each day through the end of the work week.
As this upper weakness pushes farther into the gulf this weekend,
upper ridging building across southeast texas behind it will
result in drier and hotter conditions settling in across the
region with highs climbing into the low to mid 90s and heat index
values in the 100 to 105 degree range.
Light east to southeast winds will become more south to southeast
this week and increase in speed as a series of weak low pressure
areas develop and move across the central plains. Onshore winds
will persist into next weekend with high pressure over the eastern
gulf and lower pressures over west texas.
Continued east to southeast flow this week will promote tide
levels around 1-1.5 feet above normal and occasionally strong rip
currents. However, tide levels should remain below critical
thresholds for coastal flooding issues. 43
Preliminary point temps pops
College station (cll) 72 89 71 91 74 20 50 10 40 10
houston (iah) 73 87 73 89 75 30 50 20 50 30
galveston (gls) 78 86 78 86 79 40 50 50 50 50
Hgx watches warnings advisories
Discussion... 08 14
aviation marine... 43
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|EPTT2 - 8771013 - Eagle Point, TX||6 mi||47 min||SE 11 G 13||83°F||86°F||1016 hPa|
|MGPT2 - 8770613 - Morgans Point, TX||9 mi||47 min||NE 6 G 9.9||82°F||84°F||1015.8 hPa|
|LYBT2||15 mi||47 min||E 2.9 G 6||78°F||84°F||1016.1 hPa|
|GRRT2||18 mi||47 min||E 9.9 G 12||84°F||86°F||1016 hPa|
|NCHT2 - 8770777 - Manchester, TX||19 mi||47 min||ENE 7 G 9.9||82°F||82°F||1015.1 hPa|
|GTOT2||20 mi||47 min||83°F||84°F|
|GNJT2 - 8771341 - Galveston Bay (North Jetty), TX||20 mi||47 min||ESE 12 G 14||84°F||1015.6 hPa|
|RLOT2 - 8770971 - Rollover Pass, TX||26 mi||47 min||SE 11 G 14||83°F||88°F||1016.1 hPa|
|HIST2||32 mi||47 min||SE 6 G 9.9||85°F||85°F||1016.3 hPa|
|LUIT2||33 mi||47 min||ENE 8 G 11||83°F|
|KXIH||36 mi||42 min||SE 11||84°F||75°F|
|42035 - GALVESTON 22NM East of Galveston, TX||38 mi||87 min||E 12 G 14||82°F||84°F||2 ft||1016.1 hPa (-2.0)||77°F|
|42043 - GA-252 TABS B||40 mi||137 min||12 G 14||77°F||84°F||1016.2 hPa (-2.0)|
|FCGT2 - 8772447 - USCG Freeport, TX||45 mi||47 min||NNE 8.9 G 12||82°F||87°F||1016.4 hPa|
Wind History for Eagle Point, TX(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Houston / Ellington, TX||10 mi||87 min||NE 10||10.00 mi||Mostly Cloudy||86°F||75°F||70%||1016.9 hPa|
|Houston, Pearland Regional Airport, TX||13 mi||24 min||E 5||9.00 mi||Partly Cloudy||87°F||73°F||63%||1016.1 hPa|
|Houston, Houston Hobby Airport, TX||16 mi||24 min||ENE 6||10.00 mi||Mostly Cloudy||85°F||72°F||65%||1016.2 hPa|
|Galveston, Scholes Field, TX||21 mi||25 min||E 8||10.00 mi||Fair||84°F||75°F||77%||1016 hPa|
|John Dunn Helistop, TX||24 mi||22 min||E 8||10.00 mi||Mostly Cloudy||82°F||68°F||62%||1014.9 hPa|
Wind History from EFD (wind in knots)
|1 day ago||E||E||NE||Calm||NE||Calm||Calm||Calm||Calm||Calm||W||NW||NE||Calm||N||NE||NE||NE||N||NE||E||E|
|2 days ago||S||SE||S||SE||SE||SE||Calm||Calm||Calm||SE||SE||Calm||SE||SE||SE||NW||N||Calm||NW||NW||N||N||NW |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Clear Lake |
Click for Map
Mon -- 06:22 AM CDT Sunrise
Mon -- 06:38 AM CDT -0.56 feet Low Tide
Mon -- 09:09 AM CDT Moonrise
Mon -- 02:43 PM CDT 0.79 feet High Tide
Mon -- 08:24 PM CDT Sunset
Mon -- 08:27 PM CDT 0.54 feet Low Tide
Mon -- 10:52 PM CDT Moonset
Mon -- 11:31 PM CDT 0.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Bolivar Roads |
Click for Map
Mon -- 04:05 AM CDT 0.00 knots Slack
Mon -- 06:21 AM CDT Sunrise
Mon -- 07:29 AM CDT 2.23 knots Max Flood
Mon -- 09:09 AM CDT Moonrise
Mon -- 02:54 PM CDT -0.00 knots Slack
Mon -- 08:22 PM CDT Sunset
Mon -- 10:51 PM CDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of SouthCentralPlains EDIT
Wind Forecast for Houston/Galveston, TX (18,4,5,8)(on/off)  Help
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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.