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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:47AM | Sunset 8:00PM | Saturday August 17, 2019 7:58 PM CDT (00:58 UTC) | Moonrise 8:33PM | Moonset 7:32AM | Illumination 94% |  |
GMZ335 Galveston Bay- 336 Pm Cdt Sat Aug 17 2019
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms late.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers in the morning. A slight chance of Thunderstorms. A chance of showers in the afternoon.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 5 to 10 knots. Bay waters smooth. Showers likely in the morning. A chance of Thunderstorms. A chance of showers in the afternoon.
Monday night..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers in the evening, then a chance of showers after midnight.
Tuesday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..South winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms in the evening, then a chance of showers and Thunderstorms after midnight.
Wednesday..Southwest winds 5 to 10 knots becoming south in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Wednesday night..South winds around 10 knots becoming southwest after midnight. Bay waters smooth to slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms after midnight.
Thursday..Southwest winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms late.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers in the morning. A slight chance of Thunderstorms. A chance of showers in the afternoon.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 5 to 10 knots. Bay waters smooth. Showers likely in the morning. A chance of Thunderstorms. A chance of showers in the afternoon.
Monday night..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers in the evening, then a chance of showers after midnight.
Tuesday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and a slight chance of Thunderstorms.
Tuesday night..South winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms in the evening, then a chance of showers and Thunderstorms after midnight.
Wednesday..Southwest winds 5 to 10 knots becoming south in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Wednesday night..South winds around 10 knots becoming southwest after midnight. Bay waters smooth to slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms after midnight.
Thursday..Southwest winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..South 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 336 Pm Cdt Sat Aug 17 2019
Synopsis for high island to matagorda ship channel out 60 nm.. A light to occasionally moderate onshore flow with slightly higher wind speeds during the overnight and early morning hours. Winds may become gusty and erratic near any Thunderstorms that do form. Seas will generally be 2 feet or less today, but will be gradually increasing to around 4 feet late tonight and Sunday. High pressure building into the region through next week will bring more relatively quiet weather.
Synopsis for high island to matagorda ship channel out 60 nm.. A light to occasionally moderate onshore flow with slightly higher wind speeds during the overnight and early morning hours. Winds may become gusty and erratic near any Thunderstorms that do form. Seas will generally be 2 feet or less today, but will be gradually increasing to around 4 feet late tonight and Sunday. High pressure building into the region through next week will bring more relatively quiet weather.
7 Day Forecast for Marine Location Near Anahuac, TX
Hourly EDIT Helplocation: 29.73, -94.7 debug
Area Discussion for - Houston/Galveston, TX
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 khgx 180045 afdhgx area forecast discussion national weather service houston galveston tx 745 pm cdt Sat aug 17 2019 Aviation [00z TAF issuance] Showers and thunderstorms have dissipated withVFR conditions across the region. Southerly flow will become southwesterly in the morning around sunrise. Some patchy st possible near cll around sunrise and can't rule out a brief stint of MVFR there. Otherwise showers developing in the coastal waters after 09z and spreading into the coastal areas around 12z. Redevelopment inland near the seabreeze late morning and spreading into the metro terminals 19-22z time frame. Leaning toward the nmm solution and if short term guidance trends in that scenario then will likely need tempo in the mid afternoon hours as S W slides in from the northwest and seabreeze collide if the mid level capping isn't too strong. 45 Prev discussion issued 320 pm cdt Sat aug 17 2019 Discussion Hot summer weather continues to be expected this weekend, but as we go deeper into next week, temperatures should begin to slowly back down, and create less of a need for heat advisories. Shower and thunderstorm patterns should be pretty typical of summer for most of the week, with daily activity largely focused in the vicinity of the seabreeze. This may change next weekend, when a slug of tropical moisture may make rainfall more widespread. Short term [through tonight] Scattered showers and thunderstorms are moving across the SE third of the region and most of the activity will end quickly this evening with the loss of daytime heating. Skies will clear mid evening with some cloud cover returning after 09z. Winds don't fully decouple tonight and with some hint of cloud cover possible, think overnight low temperatures will remain on the warm side with low temperatures remaining in the lower 80's over the houston area, mid 80's along the coast and upper 70's over the rest of the region. 43 Long term [Sunday through Saturday] Sunday largely looks to be a repeat of today. The ridge aloft does look to slide west slightly, which may usher in just a bit of drier continental air - but potentially enough to allow us to mix out a bit more effectively and see a slightly lower number of diurnal showers and thunderstorms. It's close enough that I will leave any decisions on whether or not a heat advisory is needed to the evening or overnight shift. Will also go with rain chances that - while matching today in pattern - are a smidge lower than today. Deeper into the week, the upper ridge may become stronger, but its maximum is also expected to retreat back towards the four corners. As a result, the expectation would be for temperatures to slide slowly down towards seasonably hot from unseasonably hot. With a relative minimum in ridge strength developing above us, my pops for the week follow a diurnal pattern pretty strongly. Trends in the magnitude of pops largely follow the path laid out by progged precipitable water trends; as pwats go up, so too do rain chances. |
As one would expect when following a diurnal trend, the best potential for showers and storms should concentrate more towards the seabreeze boundary in the afternoon. After a pretty stable week, we'll have to keep an eye on what's coming our way next weekend. The feature to watch will be a slug of tropical moisture making its way up from the bay of campeche. This phrasing at this time of year may bring concerns about tropical development - and I certainly can't deny that a tropical cyclone is a possibility. But, for now, the guidance is seeing this as a mid-level disturbance that may or may not even have some kind of surface reflection. If anything, the trend in the models has been for less potential of tropical cyclogenesis. But, regardless of whether we get a named storm out of this feature or not, we'll have to keep a close eye on the amount of moisture headed our way and the potential to fuel heavy rains. For now, the forecast has no real reason to deviate from the guidance consensus of having more widespread rains than the more seasonal pattern described for the work week, but will also forecast the heaviest rain to fall safely offshore. At this range, there is not a ton of confidence in how exactly this will play out - so we'll be keeping a close eye on how things trend in the coming days. Marine A light to occasionally moderate onshore flow will persist through the weekend with slightly higher wind speeds during the overnight and early morning hours. The gradient will tighten tonight over the western gulf waters has pressures drop over eastern new mexico. Will issue a scec for the western waters tonight as winds increase to 15 to 20 knots. The gradient will relax on Sunday and winds will decrease by afternoon. The start of next week looks relatively quiet as high pressure builds over the eastern gulf. A weak upper level disturbance moving into the area will bring a chance of showers and storms to the gulf waters Mon tue. 43 Climate The first 16 days of august have been very warm. The average temperature for the period of aug 1 thru aug 16 was 88.6 degrees at bush iah (3rd warmest - trailing 2011 90.4 and 1962 89.3), 87.7 degrees at hobby (2nd warmest - trailing 2011 89.0) and 88.4 at galveston (2nd warmest - trailing 2011 88.7 degrees). 43 Preliminary point temps pops College station (cll) 78 100 78 99 77 10 10 0 20 0 houston (iah) 81 96 80 95 79 10 20 10 50 10 galveston (gls) 85 91 84 90 83 20 20 10 60 30 Hgx watches warnings advisories Tx... None. Gm... Small craft should exercise caution until 5 am cdt Sunday for the following zones: coastal waters from freeport to matagorda ship channel tx out 20 nm... Waters from freeport to matagorda ship channel tx from 20 to 60 nm. Discussion... aviation... 45 |
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 |
| MGPT2 - 8770613 - Morgans Point, TX | 15 mi | 58 min | S 12 G 14 | 89°F | 89°F | 1010.6 hPa (-0.8) | ||
| RLOT2 - 8770971 - Rollover Pass, TX | 18 mi | 58 min | SSW 5.1 G 12 | 87°F | 91°F | 1011.3 hPa (-0.7) | ||
| HIST2 | 19 mi | 64 min | S 8 G 13 | 87°F | 90°F | 1010.9 hPa | ||
| EPTT2 - 8771013 - Eagle Point, TX | 21 mi | 64 min | S 15 G 18 | 88°F | 89°F | 1010.2 hPa | ||
| GNJT2 - 8771341 - Galveston Bay (North Jetty), TX | 26 mi | 64 min | S 13 G 16 | 87°F | 89°F | 1010.2 hPa | ||
| GTOT2 | 29 mi | 58 min | S 6 G 9.9 | 88°F | 88°F | 1011 hPa (-0.6) | ||
| NCHT2 - 8770777 - Manchester, TX | 30 mi | 58 min | S 8.9 G 14 | 89°F | 89°F | 1009.8 hPa (-0.7) | ||
| GRRT2 | 31 mi | 58 min | SSW 11 G 14 | 87°F | 91°F | 1010.6 hPa (-0.6) | ||
| 42035 - GALVESTON 22NM East of Galveston, TX | 38 mi | 38 min | S 14 G 18 | 88°F | 1012 hPa | 82°F | ||
| KXIH | 39 mi | 43 min | S 9.9 G 16 | 88°F | 75°F | |||
| PORT2 - 8770475 - Port Arthur, TX | 42 mi | 58 min | S 5.1 G 8 | 87°F | 90°F | 1011.8 hPa (-0.6) | ||
| SBPT2 - 8770570 - Sabine Pass North, TX | 44 mi | 58 min | S 11 G 14 | 86°F | 91°F | 1013.2 hPa (-0.7) | ||
| TXPT2 | 46 mi | 58 min | S 11 G 17 | 86°F | 89°F | 1010.2 hPa (-0.7) |
Wind History for Morgans Point, TX
(wind in knots) EDIT (on/off) Help| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | SE G12 | SE G10 | SE G13 | SE G12 | S | S G13 | S G11 | S G18 | S G9 | SW G9 | SW G8 | SW | SW | SW | S G8 | S G9 | SE | S G13 | SE | SE G9 | S G13 | S G16 | S G15 | S G14 |
| 1 day ago | SE | E | E | E | SE | SE G9 | E | E G19 | S | SW | SW | W | W | N | NE G7 | E G7 | SE | SW | NE | SE | S G14 | SE G14 | SE G12 | SE G14 |
| 2 days ago | SE G12 | S | SE | NW | W | W | N G9 | N | N | NE | N | N | NE | NE | NE | -- | N | N | S G8 | SE | S | S | SE | E G9 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Houston / Ellington, TX | 26 mi | 2.1 hrs | SSE 13 | 10.00 mi | Mostly Cloudy | 90°F | 73°F | 59% | 1013.5 hPa |
Link to 5 minute data for KEFD
Wind History from EFD (wind in knots)
| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | SE | SE | SE | SE | SE | S | Calm | S | Calm | Calm | Calm | Calm | S | S | SW | S | S | S | S | S G18 | S | SE | S | SE |
| 1 day ago | E | E | E | E | Calm | Calm | Calm | SW | SW | SW | SW | Calm | Calm | W | W | N | SE | NE | E | SE | SE | SE | SE | SE |
| 2 days ago | Calm | Calm | Calm | SW | NW | NW | W | Calm | Calm | N | Calm | NW | N | W | E | S | SE | E |
Tide / Current Tables for Point Barrow, Trinity Bay, Texas
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPoint Barrow
Click for Map
Sat -- 04:26 AM CDT 0.10 feet Low Tide
Sat -- 06:48 AM CDT Sunrise
Sat -- 08:32 AM CDT Moonset
Sat -- 01:01 PM CDT 1.05 feet High Tide
Sat -- 04:54 PM CDT 0.78 feet Low Tide
Sat -- 07:58 PM CDT Sunset
Sat -- 09:33 PM CDT Moonrise
Sat -- 11:09 PM CDT 0.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 04:26 AM CDT 0.10 feet Low Tide
Sat -- 06:48 AM CDT Sunrise
Sat -- 08:32 AM CDT Moonset
Sat -- 01:01 PM CDT 1.05 feet High Tide
Sat -- 04:54 PM CDT 0.78 feet Low Tide
Sat -- 07:58 PM CDT Sunset
Sat -- 09:33 PM CDT Moonrise
Sat -- 11:09 PM CDT 0.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.9 | 0.7 | 0.4 | 0.2 | 0.1 | 0.1 | 0.2 | 0.3 | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1.1 | 1 | 0.9 | 0.8 | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 1 | 1 |
Tide / Current Tables for Gilchrist, East Bay, Texas
EDIT (on/off) Help One Week of DataGilchrist
Click for Map
Sat -- 04:01 AM CDT 0.11 feet Low Tide
Sat -- 06:47 AM CDT Sunrise
Sat -- 08:31 AM CDT Moonset
Sat -- 10:29 AM CDT 1.15 feet High Tide
Sat -- 04:29 PM CDT 0.85 feet Low Tide
Sat -- 07:56 PM CDT Sunset
Sat -- 08:37 PM CDT 1.07 feet High Tide
Sat -- 09:31 PM CDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 04:01 AM CDT 0.11 feet Low Tide
Sat -- 06:47 AM CDT Sunrise
Sat -- 08:31 AM CDT Moonset
Sat -- 10:29 AM CDT 1.15 feet High Tide
Sat -- 04:29 PM CDT 0.85 feet Low Tide
Sat -- 07:56 PM CDT Sunset
Sat -- 08:37 PM CDT 1.07 feet High Tide
Sat -- 09:31 PM CDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.6 | 0.4 | 0.3 | 0.1 | 0.1 | 0.2 | 0.3 | 0.5 | 0.8 | 1 | 1.1 | 1.1 | 1.1 | 1 | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 | 1 | 1.1 | 1.1 | 1 | 0.9 |
Weather Map and Satellite Images
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GOES Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Houston/Galveston, TX (20,4,5,8)
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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. |