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Marine Weather and Tides
Version 3.4 |
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 7:25AM | Sunset 6:47PM | Friday October 20, 2017 1:07 PM CDT (18:07 UTC) | Moonrise 7:06AM | Moonset 6:41PM | Illumination 0% |  |
Marine Forecasts
EDIT (on/off) Help| GMZ355 Coastal Waters From High Island To Freeport Out 20 Nm- 1038 Am Cdt Fri Oct 20 2017 .small craft should exercise caution... This afternoon..Southeast winds 15 to 20 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. A chance of showers and Thunderstorms. Tonight..Southeast winds 15 to 20 knots. Seas 3 to 5 feet. A chance of showers and Thunderstorms. Saturday..Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and Thunderstorms in the morning, then a slight chance of showers and Thunderstorms in the afternoon. Saturday night..Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A slight chance of showers and Thunderstorms in the evening, then a chance of showers and Thunderstorms after midnight. Sunday..West winds 5 to 10 knots becoming northwest 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon. Sunday night..North winds 15 to 20 knots. Seas 3 to 5 feet. A slight chance of showers and Thunderstorms in the evening. Monday..North winds 15 to 20 knots. Seas 3 to 5 feet. Monday night..North winds 10 to 15 knots. Seas 2 to 4 feet subsiding to 1 to 2 feet after midnight. Tuesday..North winds 10 to 15 knots. Seas 2 to 3 feet. Tuesday night..North winds 15 to 20 knots. Seas 2 to 3 feet. | GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1038 Am Cdt Fri Oct 20 2017 Synopsis for high island to matagorda ship channel out 60 nm.. A coastal trough will combine with an upper level storm system to bring scattered to numerous showers and Thunderstorms across the bays and upper texas coastal waters today. Winds and seas will be higher in and near any Thunderstorms. A long onshore fetch will continue into the weekend and result in continued elevated seas and tides. A cold frontal passage is expected off of the coast Sunday afternoon. |
7 Day Forecast for Marine Location Near Oyster Creek, TX
Hourly EDIT Helplocation: 29.08, -95.17 debug
Area Discussion for - Houston/Galveston, TX
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 khgx 201553 afdhgx area forecast discussion national weather service houston galveston tx 1053 am cdt Fri oct 20 2017 Discussion The surge of higher gulf moisture certainly made its presence known this morning with a good 3 to 7 inches of rain that fell across portions of galveston and harris counties. This activity has shifted east of i-45 this morning in line with previous days model runs and within the axis of higher moisture with 1.8 to 2.1 inches of precipitable water. The difference is that this shift has occurred much sooner than forecast and the same can be said for the swath of heavy rainfall. The main changes to the forecast for today were to have higher rain chances over the eastern most counties of the forecast area east of i-45 with 30-40 pop for the rest of the area. With day time heating there still could be a few storms that develop but think for the most part any activity this afternoon may be more isolated than scattered. High temperature forecast for this afternoon was also updated to have upper 70s over the areas where rain is expected and mid 80s where cloud cover is thin. Early look at the 12z models show another band of convection setting up tomorrow afternoon from wharton up to crockett. There might be a weak vorticity MAX to swing through the area tomorrow afternoon helping to initiate this activity. Cold front and possible squall line of storms still on track for Sunday morning. There are still some timing differences in the models to reconcile with the line of storms and possibly pre-frontal trough out running the front. Overpeck Prev discussion issued 642 am cdt Fri oct 20 2017 aviation... the axis of showers and thunderstorms was pushing north and east at 1130z. Best chances will be from kiah north and northwestward through 14z to 15z. Although there is an outside chance of thunder, expect the rest of the day will see isolated to scattered coverage of mainly showers as the surface front pressure trough that help generate the earlier storms continues to push inland. May see a brief period of MVFR conditions -- mainly ceilings -- during the late morning to midday period (15z through 18 19z). Any shower activity that flares up this afternoon should dissipate between 00z and 03z. MVFR conditions are expected after 09z and there is a slight chance that ifr or lower could develop. Sref probabilities do show some potential for patchy fog but the main threat will be from lowering ceilings. 40 prev discussion... Issued 419 am cdt Fri oct 20 2017 discussion... at 3 am, a coastal trough was located from about port arthur to galveston to palacios. At 850 mb, high pressure was located over the middle tennessee valley and the flow around this feature was bring a plume of deeper moisture into SE tx. 850 mb dew points have increased to 15 c at crp. At 300 mb, upper level winds were strongly diffluent and a speed MAX was noted approaching west texas. Water vapor imagery shows two distinct disturbances with the first approaching early this morning and the second and weaker disturbance arriving late this morning. At 345 am, a band of showers and thunderstorms extended from sugar land to galveston and then offhsore. This band will continue to move north and should be in houston by the morning commute. The latest hrrr runs and the hi res arw both support some training of precip this |
morning over harris county and concern is growing that some locally heavy rain could develop. Will mention locally heavy rain in the weather grids for braz galv and harris counties for this morning. Some of the short term guidance is producing 3 to 6 inches of rain this morning so it's something to watch. Pw values decrease tonight to around 1.60 inches and not seeing much forcing. Will carry 20 pops for now but think it'll be dry for most of the area. Models continue to advertise rain on Saturday. Fcst soundings not looking impressive with a lot of dry air between 900-700 mb. Upper level winds remain weakly diffluent and both the GFS and ECMWF show a strong disturbance embedded in the SW flow aloft moving across the western half of the CWA in aftn. Will carry 30 pops for now but these may need to be raised. A strong cold front will approach the area late Saturday night into Sunday morning. Strong forcing from an upper level trough and favorable jet dynamics favor widespread precip ahead of the front. Se tx will lie in a 90 kt rrq which should aid lift. Only concern on Sunday morning is that a pre frontal trough may develop and outrun the actual front decrease the low level convergence. Even so, feel upper level dynamics will compensate if low level convergence weakens. Have favored the ECMWF for Sundays precips event over the gfs. Skies should begin to clear from west to east Sunday afternoon with generally clear skies and much cooler temperatures Sunday night. Monday through Wednesday look spectacular with generally clear skies and cool autumn temperatures. Onshore winds return Thursday and temperatures will trend warmer with afternoon high temps back into the lower 80s. GFS and ECMWF differ significantly Friday and beyond with the ECMWF producing more rain with next Friday's front and placing SE tx in a zonal flow for early next week. The gfs shows a weaker front next Friday with less rain and it maintains a weak upper level weakness. Have leaned a bit toward the ecmwf. 43 marine... an coastal trough will help generate periods of showers and thunderstorms today. Easterly winds over the coastal waters may actually become southeasterly today due to the coastal trough. Conditions are expected to reach advisory levels due mainly to wind speeds east of freeport with caution levels west of freeport. That said, winds and seas will be higher in and near thunderstorms. Elevated tides are also a concern today. During times of high tides later today, minor coastal flooding is possible along the bolivar peninsula and near surfside. 40 Preliminary point temps pops College station (cll) 82 71 87 69 78 30 20 30 60 60 houston (iah) 79 73 87 73 83 50 20 30 50 70 galveston (gls) 80 78 84 77 84 50 40 30 40 70 Hgx watches warnings advisories Tx... Small craft should exercise caution until 7 pm cdt this evening for the following zones: galveston... Matagorda. Gm... Small craft should exercise caution until 7 pm cdt this 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. Discussion... 39 |
Weather Reporting Stations
EDIT (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 |
| LUIT2 | 3 mi | 50 min | ENE 15 G 17 | 77°F | 1016.7 hPa | |||
| FCGT2 - 8772447 - USCG Freeport, TX | 12 mi | 50 min | NE 9.9 G 11 | 80°F | 76°F | 1016.8 hPa | ||
| GRRT2 | 21 mi | 50 min | N 19 G 22 | 75°F | 75°F | 1017.3 hPa | ||
| GTOT2 | 26 mi | 50 min | 73°F | 78°F | ||||
| GNJT2 - 8771341 - Galveston Bay (North Jetty), TX | 30 mi | 56 min | E 19 G 22 | 77°F | 1017.6 hPa | |||
| EPTT2 - 8771013 - Eagle Point, TX | 31 mi | 56 min | ESE 16 G 20 | 74°F | 74°F | 1017.7 hPa | ||
| SGNT2 | 32 mi | 50 min | E 5.1 G 7 | 80°F | 76°F | 1015.9 hPa | ||
| 42035 - GALVESTON 22NM East of Galveston, TX | 41 mi | 78 min | E 18 G 27 | 75°F | 79°F | 6 ft | 1017 hPa (-0.7) | 74°F |
| MGPT2 - 8770613 - Morgans Point, TX | 43 mi | 50 min | E 11 G 18 | 73°F | 77°F | 1017.7 hPa | ||
| NCHT2 - 8770777 - Manchester, TX | 45 mi | 50 min | ENE 5.1 G 9.9 | 77°F | 79°F | 1016.9 hPa | ||
| RLOT2 - 8770971 - Rollover Pass, TX | 46 mi | 50 min | ESE 19 G 22 | 75°F | 74°F | 1017.7 hPa | ||
| EMAT2 | 47 mi | 56 min | E 5.1 G 6 | 79°F | 76°F | 1015.7 hPa |
Wind History for USCG Freeport, TX
(wind in knots) EDIT (on/off) Help| 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | |
| Last 24hr | NE G16 | NE G18 | NE G16 | NE G21 | NE G16 | NE G17 | NE G16 | NE G17 | NE G17 | NE G14 | NE G14 | E G16 | E | E G17 | E G15 | SE G16 | SE G15 | E G13 | E G9 | E G11 | E G11 | E G10 | E G8 | NE |
| 1 day ago | N | NE G9 | NE | E G10 | NE G10 | NE | E G6 | NE | E | NE G11 | NE G14 | E G16 | E G13 | E | E G10 | SE | E G11 | SE | E G10 | E G10 | E G11 | NE G12 | NE G14 | NE G13 |
| 2 days ago | NE G12 | NE G13 | NE G14 | NE G14 | NE G14 | NE G13 | NE | NE | NE | N | N | NW | N | N | N G7 | N G7 | N G7 | N G7 | N | N | N G9 | N G9 | N | NE |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Angleton / Lake Jackson, Brazoria County Airport, TX | 16 mi | 75 min | SE 6 | 10.00 mi | Mostly Cloudy | 82°F | 73°F | 74% | 1016.4 hPa |
| Galveston, Scholes Field, TX | 21 mi | 76 min | ENE 11 | 10.00 mi | Overcast | 79°F | 73°F | 85% | 1017.6 hPa |
Wind History from LBX (wind in knots)
| 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | |
| Last 24hr | E G19 | E | E | E | E | E | E | NE | NE | N | N | N | S G18 | N | NE | N | NE | Calm | E | SE | E | E | SE | E |
| 1 day ago | E | E | SE | E | E | E | NE | NE | NE | NE | N | N | N | N | Calm | N | N | N | N | NE | E | SE | E | |
| 2 days ago | E | N | NE | N | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | N | N | N | N | N | N | N | N | N | Calm |
Tide / Current Tables for Christmas Point, Christmas Bay, Texas
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Christmas Point Click for Map Fri -- 01:40 AM CDT 0.70 feet Low Tide Fri -- 06:57 AM CDT 0.98 feet High Tide Fri -- 07:25 AM CDT Sunrise Fri -- 08:05 AM CDT Moonrise Fri -- 01:34 PM CDT 0.29 feet Low Tide Fri -- 06:45 PM CDT Sunset Fri -- 07:41 PM CDT Moonset Fri -- 08:52 PM CDT 1.09 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.8 | 0.7 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 1 | 0.9 | 0.8 | 0.7 | 0.5 | 0.4 | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1 | 1.1 | 1.1 | 1.1 | 1 |
Tide / Current Tables for Alligator Point, West Bay, Texas
EDIT (on/off) Help One Week of Data| Alligator Point Click for Map Fri -- 01:52 AM CDT 0.75 feet Low Tide Fri -- 07:09 AM CDT 1.01 feet High Tide Fri -- 07:25 AM CDT Sunrise Fri -- 08:05 AM CDT Moonrise Fri -- 01:45 PM CDT 0.34 feet Low Tide Fri -- 06:44 PM CDT Sunset Fri -- 07:41 PM CDT Moonset Fri -- 09:05 PM CDT 1.12 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.8 | 0.8 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1 | 0.9 | 0.7 | 0.6 | 0.4 | 0.4 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1 | 1.1 | 1.1 | 1.1 | 1 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of SouthCentralPlains EDIT  |
Wind Forecast for Houston/Galveston, TX (14,3,4,5)
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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. |