Saturday, February29, 2020
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Marine Weather and Tides
Houston, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:46AMSunset 6:21PM Saturday February 29, 2020 5:56 AM CST (11:56 UTC) Moonrise 10:16AMMoonset 11:45PM Illumination 34% Phase: Waxing Crescent; Moon at 6 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 Galveston Bay- 348 Am Cst Sat Feb 29 2020
Today..South winds 5 to 10 knots. Bay waters smooth.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..South winds around 15 knots. Bay waters slightly choppy to choppy. A slight chance of showers.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers early in the evening. A slight chance of showers late.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers. Patchy fog late in the afternoon.
Monday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A slight chance of showers.
Tuesday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A slight chance of showers in the morning. Isolated Thunderstorms in the late morning and afternoon. A chance of showers in the afternoon.
Tuesday night..East winds 5 to 10 knots becoming north after midnight. Bay waters smooth. Patchy fog in the evening. A chance of showers and isolated Thunderstorms.
Wednesday..North winds 10 to 15 knots becoming northwest in the afternoon. Bay waters slightly choppy. Isolated Thunderstorms in the morning. A chance of showers.
Wednesday night..Northwest 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 348 Am Cst Sat Feb 29 2020
Synopsis for high island to matagorda ship channel out 60 nm.. High pressure moving off to the east and low pressure deepening over the southern plains will allow for the return of slowly strengthening onshore winds today and tonight. Caution flags or advisories may be needed this evening for the coastal waters. We are continuing to Monitor for possible sea fog development for as early as Sunday night or most likely Monday night. There will also be a potential for elevated swells given the forecast of a lengthening se fetch. A cold front will cross se texas on late Tuesday or early Wednesday. While the timing of this feature is still uncertain, showers and Thunderstorms should develop just ahead and along the front itself.


7 Day Forecast for Marine Location Near Houston, TX
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location: 29.74, -95.33     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 291017 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 417 AM CST Sat Feb 29 2020

SHORT TERM [Tonight Through Sunday]. Shallow, patchy fog stretching from roughly Angleton to Palacios should burn off shortly after sunrise. Otherwise, another nice day is on tap with highs in the mid 70s. High pressure has moved off to the east and southerly winds will begin transporting Gulf moisture back into the region. Cloudiness will increase tonight and low temps should be a good 10-15 degrees higher than what we see early this morning. Mostly cloudy, warm and breezy conditions will persist on Sunday. Rain chances will reenter the forecast during the day as low levels of the atmos begin to saturate under the cap and a weak upper level impulse passes through from the southwest. Not everyone will see precip, and those that do will see just light amounts . just typical iso/sct waa type shra. 47

LONG TERM [Sunday Night Through Saturday]. Generally more of the same thru Monday night. Our next weather system will be approaching from the west and bring our next decent chance of showers & thunderstorms sometime between Tuesday afternoon and Wednesday afternoon.

Though differences remain in regards to timing and specific details, the next western trof will move across northern Mexico toward Tx. As this occurs, a surface low will probably develop in advance somewhere near south Tx then track northeast toward southeast Texas. It's eventual track and the evolution of the upper level details will be determinant as to where the better chances of higher rainfall amounts and potential for any strong/severe storms might be. We're still in kind of the wait and see period until things line up better and fcst confidence improves. At this time ECMWF, ICON, UKMET take a more southern track with the wave/low and bring a swath of 1-3" rains across our northern zones by the end of the day Wed. GFS is further north (and faster). A cold front will push through as the system departs the area. Wrap around cloudiness and maybe some light precip can be expected in its wake before things clear out.

Dry seasonable wx is expected Thur-Sat. 47

AVIATION [12Z TAF Issuance]. With the cirrus thinning out in spots, we are seeing some areas of patchy fog this morning. Otherwise, no issues are expected for the afternoon as VFR conditions prevail. The return of southerly winds this afternoon could lead to increasing moisture across SE TX this evening/tonight . and possibly lower CIGS/VIS with the development of low clouds/fog. However, low-level winds could be too strong as the gradient tightens in response to a deepening low pressure over the Southern Plains. 41

MARINE. As high pressure continues to weaken/shift east, light onshore winds are expected to develop areawide through this afternoon. These winds will strengthen tonight in response to a deepening area of low pres- sure over the Southern Plains. SCEC (or possibly SCA) flags could be needed for the coastal waters tonight through Sun night as this sys- tem lifts slowly to the ENE. The slightly decreased winds along with the continued WAA will favor the development of sea fog . perhaps as early as Sun night, but most likely by Mon late afternoon/evening.

This sea fog could linger until the passage of the next cold front. At this time, models remain in disagreement with the timing of this boundary . with some bringing it across SE TX either Tue evening or Weds afternoon. Have kept with the previous forecast trends of late Tue FROPA. Showers and thunderstorms may develop along and ahead of the advancing front. Strong northerly winds in the wake of the cold front (along with building seas) will likely require SCEC/SCA flags for the marine waters from Tues night into Weds night. 41

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 75 59 76 65 79 / 0 10 20 10 20 Houston (IAH) 75 60 75 66 77 / 0 0 30 20 20 Galveston (GLS) 68 63 72 65 72 / 0 0 20 10 20

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 4 mi56 min WSW 1 G 2.9 53°F 62°F1025.8 hPa (-0.9)
MGPT2 - 8770613 - Morgans Point, TX 19 mi56 min WSW 2.9 G 2.9 54°F 59°F1026.2 hPa (-0.9)
EPTT2 - 8771013 - Eagle Point, TX 28 mi56 min SW 4.1 G 5.1 53°F 58°F1025.7 hPa (-0.9)
GRRT2 38 mi56 min W 1.9 G 2.9 54°F 58°F1026 hPa (-0.7)
GTOT2 41 mi56 min WSW 1.9 G 5.1 56°F 58°F1026.3 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 42 mi62 min Calm G 4.1 56°F 58°F1025.4 hPa
RLOT2 - 8770971 - Rollover Pass, TX 46 mi56 min Calm G 0 52°F 54°F1026.8 hPa (-0.5)
LUIT2 47 mi56 min S 1.9 G 2.9 57°F 59°F1027.7 hPa (-0.7)

Wind History for Morgans Point, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Houston Hobby Airport, TX7 mi63 minN 010.00 miMostly Cloudy46°F41°F83%1026.7 hPa
Houston / Ellington, TX12 mi66 minN 010.00 miMostly Cloudy45°F42°F93%1026.1 hPa
Houston, Pearland Regional Airport, TX16 mi63 minN 09.00 miFair45°F39°F83%1026.8 hPa
Houston Intercontinental Airport, TX16 mi63 minN 010.00 miMostly Cloudy44°F39°F85%1026 hPa
Houston Southwest Airport, TX18 mi61 minN 01.25 miFog/Mist41°F40°F100%1026.7 hPa
Houston, Sugar Land Municipal / Hull Field Airport, TX19 mi63 minN 010.00 miFair45°F42°F90%1026.1 hPa

Link to 5 minute data for KMCJ

Wind History from MCJ (wind in knots)
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Last 24hrCalm335S6CalmCalmCalmCalmCalmCalmCalm----------------------N11
1 day ago--CalmCalmCalmCalm5
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----------------------Calm
2 days ago------CalmCalmCalmCalmCalmSW6CalmCalmCalmCalmCalm------------------5

Tide / Current Tables for Houston Ship Channel, Galveston Bay, Manchester, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for San Jacinto Battleground State Historic Site, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of SouthCentralPlains    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 (6,6,7,8)
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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 numerous 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.