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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 6:52AM | Sunset 7:57PM | Wednesday August 21, 2019 7:33 PM CDT (00:33 UTC) | Moonrise 10:41PM | Moonset 11:05AM | Illumination 61% |  |
GMZ335 Galveston Bay- 333 Pm Cdt Wed Aug 21 2019
Tonight..South winds 5 to 10 knots. Bay waters smooth.
Thursday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Friday..Southeast winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely.
Friday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Saturday..South winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely.
Saturday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Sunday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Tonight..South winds 5 to 10 knots. Bay waters smooth.
Thursday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Friday..Southeast winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely.
Friday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Saturday..South winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely.
Saturday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Sunday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 333 Pm Cdt Wed Aug 21 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore flow will continue over the next few days, with slightly higher wind speeds during the overnight hours. There is a possibility of isolated to scattered showers and Thunderstorms over the next couple of days with increased chances on Friday and into the weekend. Winds and seas slightly increase during this timeframe as a surge of tropical moisture from the northwestern caribbean enters the northern gulf. No tropical development is expected from this system. Onshore flow continues for the start of next week as an upper level ridge remains over texas.
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore flow will continue over the next few days, with slightly higher wind speeds during the overnight hours. There is a possibility of isolated to scattered showers and Thunderstorms over the next couple of days with increased chances on Friday and into the weekend. Winds and seas slightly increase during this timeframe as a surge of tropical moisture from the northwestern caribbean enters the northern gulf. No tropical development is expected from this system. Onshore flow continues for the start of next week as an upper level ridge remains over texas.
7 Day Forecast for Marine Location Near Manvel, TX
Hourly EDIT Helplocation: 29.47, -95.39 debug
Area Discussion for - Houston/Galveston, TX
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 khgx 220013 afdhgx area forecast discussion national weather service houston galveston tx 713 pm cdt Wed aug 21 2019 Aviation [00z TAF issuance] Isolated widely scattered convection that formed earlier today has all but dissipated at this time. A few straggling showers are try- ing to move in from the NE at present, but these probably will not last too much longer. The rest of tonight should be quiet withVFR conditions prevailing. Otherwise... Not going with a lot of changes from previous TAF trends as we remain in the same pattern of these last few several days. Activity over the coastal waters during the very early morning hours will be moving inland by the afternoon... with development fueled by daytime heating and the seabreeze. Once again, things to quiet considerably by thurs evening. 41 Prev discussion issued 352 pm cdt Wed aug 21 2019 short term [this afternoon through Thursday]... showers and isolated thunderstorms are currently developing mainly south of i-10 and east of i-45, and are expected to gradually move north to northeast as the afternoon progresses. This activity is expected to dissipate by the evening with the loss of heating. For tonight, expect clear to partly cloudy skies with low temperatures ranging in the mid 70s to low 80s. Passing showers are possible over the gulf waters late tonight to early Thursday morning, and could move into the coastline from time to time. Thursday, light southerly wind flow and high temperatures ranging in the low to upper 90s expected. Mid to upper level ridge will start to retreat to the west, decreasing subsidence across southeast texas, as an upper level trough moves across the great lakes region. Deep low level moisture is expected to begin to move into the region, but should remain mainly along the gulf waters and southern counties throughout the day. Data shows pwat values between 2.00 to 2.25 inches lingering across the aforementioned areas starting Thursday morning through Thursday evening. Elsewhere, pwat values of 1.40 to 1.90 inches expected. With the ridge further west and low level moisture gradually increasing across the gulf and southern regions, expect showers over the gulf waters and coastal regions in the morning, followed by showers and thunderstorms developing across the southern and central regions during the late morning and afternoon hours. Most of the activity is expected to dissipate in the evening. However, showers and thunderstorms are expected to continue over the local waters... Occansionally moving into the coastal areas throughout the night. Low temperatures will remain in the mid 70s to low 80s. 24 |
long term [Friday through Tuesday]... chances of shower and thunderstorms activity will increase Friday. Mid to upper level trough will slowly move across the great lakes region and the ridge will remain west of texas Friday. Deep low level moisture will continue to filter into the gulf water and southern regions of southeast texas, moving further north as the day progresses. Pwat values between 1.70 and 2.30 inches should encompass the region by Friday afternoon, particularly along the southern and central regions. Pwat values of 2.20 to 2.50 inches is expected to remain mainly over the gulf waters. Expect shower and thunderstorm activity to continue over the gulf waters and southern portions of southeast texas early Friday morning. As the day progresses, shower and thunderstorm coverage and intensity will increase and expand further inland. Strong storms will be capable of producing periods of heavy rainfall, frequent lightning and gusty winds. The heavy rainfall could lead to ponding of water along roadways and areas of poor drainage as well as reduced visibility. For the upcoming weekend, a similar pattern looks to set up with the deep low level moisture lingering over the gulf waters as well as the southern and central regions. Additionally, an upper level disturbance or shortwave will move eastward across central conus and north of texas Saturday, elongating southward into the eastern tx and la region Sunday. On Monday and Tuesday, low level moisture is expected to decrease, however, the proximity of the upper level trough could continue to enhance shower and thunderstorm activity across southeast texas, mainly in the afternoons. Expect periods of showers and thunderstorms along the gulf waters and southern and central regions throughout the day, with lighter activity developing over the northern regions. At nighttime, activity is expected to dissipate inland and persist mainly over the waters and coastal regions. High temperatures will range in the mid to upper 90s north of i-10 and in the low to mid 90s south of i-10 each day. Low temperatures will range in the mid 70s to low 80s. A southerly wind flow is expected to prevail throughout the forecast period. 24 Preliminary point temps pops College station (cll) 76 99 76 97 76 0 10 20 30 10 houston (iah) 78 95 78 93 78 10 20 40 60 30 galveston (gls) 83 91 82 89 82 10 40 60 70 60 Hgx watches warnings advisories Tx... None. Gm... None. |
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 |
| NCHT2 - 8770777 - Manchester, TX | 19 mi | 46 min | S 6 G 11 | 89°F | 89°F | 1013.5 hPa | ||
| EPTT2 - 8771013 - Eagle Point, TX | 25 mi | 46 min | SSE 9.9 G 12 | 1013.8 hPa | ||||
| MGPT2 - 8770613 - Morgans Point, TX | 26 mi | 46 min | SSE 9.9 G 14 | 1014.4 hPa | ||||
| GRRT2 | 29 mi | 46 min | S 7 G 9.9 | 1014.2 hPa | ||||
| LUIT2 | 31 mi | 46 min | SSE 7 G 12 | 87°F | 89°F | 1014.5 hPa | ||
| GTOT2 | 34 mi | 46 min | SSE 4.1 G 7 | 89°F | 90°F | 1014.6 hPa | ||
| GNJT2 - 8771341 - Galveston Bay (North Jetty), TX | 36 mi | 58 min | SSE 9.9 G 12 | 87°F | 90°F | 1013.8 hPa | ||
| FCGT2 - 8772447 - USCG Freeport, TX | 37 mi | 46 min | SE 11 G 13 | 1015 hPa | ||||
| FPST2 | 37 mi | 46 min | SE 12 G 13 | 86°F | 86°F | 1014.3 hPa | ||
| 42043 - GA-252 TABS B | 43 mi | 94 min | SE 7.8 G 12 | 88°F | 1014.5 hPa (-1.3) | |||
| RLOT2 - 8770971 - Rollover Pass, TX | 47 mi | 46 min | S 8 G 9.9 | 87°F | 92°F | 1015.1 hPa |
Wind History for Eagle 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 | S | S | S | S | S | S | S | S | S | S | SW | SW | SW | SW | SW G10 | SE | SE | SE G4 | SW G14 | S | S | SE | SE | S |
| 1 day ago | S | S | S | S | S | SW | SW | SW | SW | SW G10 | W | NW | W | SW | S | E | SE | SW G14 | S | S | S G19 | S | SW | |
| 2 days ago | S | S | S | S | S | S | S | S G13 | S | SW | SW | SW | SW | SW G10 | S | S | S G16 | S G17 | S | S | S G16 | S | S | S |
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 Southwest Airport, TX | 5 mi | 59 min | N 0 | 10.00 mi | Fair | 88°F | 73°F | 64% | 1014.6 hPa |
| Houston, Pearland Regional Airport, TX | 9 mi | 41 min | SSE 8 | 10.00 mi | Fair | 90°F | 71°F | 54% | 1014.7 hPa |
| Houston, Houston Hobby Airport, TX | 14 mi | 41 min | SSE 9 | 10.00 mi | Partly Cloudy | 90°F | 71°F | 54% | 1014.3 hPa |
| Houston / Ellington, TX | 16 mi | 1.7 hrs | SSE 10 | 10.00 mi | Showers in Vicinity | 90°F | 71°F | 55% | 1014.6 hPa |
| Houston, Sugar Land Municipal / Hull Field Airport, TX | 17 mi | 41 min | SSE 6 | 10.00 mi | Fair | 89°F | 75°F | 63% | 1013.9 hPa |
| John Dunn Helistop, TX | 17 mi | 39 min | N 0 | 8.00 mi | Fair | 90°F | 71°F | 55% | 1013.9 hPa |
Link to 5 minute data for KAXH
Wind History from AXH (wind in knots)
| 8 PM | 9 PM | 10 PM | 11 PM | -12 PM | 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 | S | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | S | W | SE | SE | S | W | S | SW | S | SE | |||||
| 1 day ago | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | W | SE G15 | S | Calm | Calm | Calm | S | S | S | ||||
| 2 days ago | S | SE | S | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SW | S | S | W | W | SW | SE | SE G16 | SE | S G15 | S |
Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
EDIT Weekend mode (on/off) (on/off) Help One Week of DataClear Lake
Click for Map
Wed -- 02:50 AM CDT 0.54 feet High Tide
Wed -- 06:51 AM CDT Sunrise
Wed -- 07:44 AM CDT 0.36 feet Low Tide
Wed -- 12:04 PM CDT Moonset
Wed -- 02:30 PM CDT 0.63 feet High Tide
Wed -- 07:54 PM CDT Sunset
Wed -- 09:30 PM CDT 0.19 feet Low Tide
Wed -- 11:39 PM CDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 02:50 AM CDT 0.54 feet High Tide
Wed -- 06:51 AM CDT Sunrise
Wed -- 07:44 AM CDT 0.36 feet Low Tide
Wed -- 12:04 PM CDT Moonset
Wed -- 02:30 PM CDT 0.63 feet High Tide
Wed -- 07:54 PM CDT Sunset
Wed -- 09:30 PM CDT 0.19 feet Low Tide
Wed -- 11:39 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 |
| 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 | 0.6 | 0.5 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 |
Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
EDIT (on/off) Help One Week of DataClear Lake
Click for Map
Wed -- 02:51 AM CDT 0.71 feet High Tide
Wed -- 06:51 AM CDT Sunrise
Wed -- 08:15 AM CDT 0.52 feet Low Tide
Wed -- 12:04 PM CDT Moonset
Wed -- 02:15 PM CDT 0.80 feet High Tide
Wed -- 07:54 PM CDT Sunset
Wed -- 09:31 PM CDT 0.36 feet Low Tide
Wed -- 11:39 PM CDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Wed -- 02:51 AM CDT 0.71 feet High Tide
Wed -- 06:51 AM CDT Sunrise
Wed -- 08:15 AM CDT 0.52 feet Low Tide
Wed -- 12:04 PM CDT Moonset
Wed -- 02:15 PM CDT 0.80 feet High Tide
Wed -- 07:54 PM CDT Sunset
Wed -- 09:31 PM CDT 0.36 feet Low Tide
Wed -- 11:39 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 | 0.6 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 | 0.5 | 0.5 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
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)
(on/off) Help
Ground Weather Radar Station Houston/Galveston, TX
(on/off) Help
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. |