Monday, August3, 2020
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Marine Weather and Tides
San Leon, 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 6:40AMSunset 8:11PM Monday August 3, 2020 12:45 PM CDT (17:45 UTC) Moonrise 7:37PMMoonset 5:30AM Illumination 100% Phase: Full Moon; Moon at 14 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- 1024 Am Cdt Mon Aug 3 2020
Rest of today..Northwest winds around 5 knots becoming south in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms early in the afternoon. A chance of showers and Thunderstorms late in the afternoon.
Tonight..Southwest winds around 10 knots becoming west after midnight. Bay waters smooth to slightly choppy becoming smooth after midnight. A chance of showers and Thunderstorms early in the evening.
Tuesday..Northwest winds 5 to 10 knots becoming southwest in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southwest winds 5 to 10 knots. Bay waters smooth.
Wednesday..West winds around 5 knots becoming south in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms in the afternoon.
Wednesday night..South winds 5 to 10 knots. Bay waters smooth.
Thursday..South winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Bay waters smooth.
Friday..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Friday night..Southeast winds 5 to 10 knots. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1024 Am Cdt Mon Aug 3 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Generally light onshore flow and low seas are expected through the week as high pressure builds over the gulf. Isolated showers and Thunderstorms will be possible in the afternoon each day.


7 Day Forecast for Marine Location Near San Leon, TX
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location: 29.48, -94.92     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 031138 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 638 AM CDT Mon Aug 3 2020

AVIATION [12Z TAF Issuance].

Some patchy fog has developed at CXO, LBX and SGR this morning briefly bringing visibility down to 2 to 4 miles, but this fog will dissipate by mid morning as the rising sun. Isolated showers and thunderstorms will again be possible this afternoon into the evening hours that may produce locally gusty winds. The terminals that have the highest chances of seeing some VCTS are CXO, IAH, and HOU. Activity decreases overnight tonight with some patchy ground fog developing again. Overall, VFR conditions prevail through the period.

Fowler

PREV DISCUSSION /Issued 357 AM CDT Mon Aug 3 2020/.

SHORT TERM [Through Tuesday Night].

Lingering moisture has lead to some patchy ground fog to develop across the southwestern counties and low lying spots around the area this morning, but this fog should dissipate shortly after sunrise. Showers and thunderstorms will again be possible across most of the area today as PWATs remain around 1.5 inches and convective temperature in the low to mid 90s, which will be reached fairly easily by the early afternoon. There is not much CAPE available this afternoon, so not anticipating much of a chance of severe weather. However, model soundings show a fairly distinct inverted-V profile, so any thunderstorms that do form will have the chance of producing some gusty winds. And if those gusty winds collide with the sea breeze, then you can expect some additional thunderstorm initiation (like yesterday). Both the NAM and GFS are showing some lingering low level frontogenesis from the seabreeze in northern Harris County into Montgomery county into the late evening hours, so have left some lingering 20 PoPs in that area into the evening. Activity will wind down overnight tonight into Tuesday morning. A very weak upper level shortwave with an slight uptick in PWATs to 1.6 to 1.7 inches will move through the area Tuesday afternoon that will again lead to a chance of afternoon showers and thunderstorms.

High temperatures will get into the mid to upper 90s today and Tuesday for most of the area with the coast staying a bit cooler with highs in the upper 80s to low 90s. Triple digit heat remain a possibility for portions of Burleson and Brazos counties. Persistence will be key with the low temperatures remaining in the mid to upper 70s.

Fowler

LONG TERM [Wednesday Through Monday].

An upper level ridge over the southern Rockies will amplify and expand into Texas as an upper level trough over the Great Lakes shifts east. The upper flow between these two features will be out of the N-NW and a series of weak upper level disturbances will move into SE TX from the north on Wednesday. The GFS fcst sounding does not show much capping with PW values topping out at 2.07 inches. Convective temperatures are in the mid 90's which looks reachable. NAM12 soundings show something similar so it seems reasonable to maintain rain chances over mainly the eastern half of the CWA closest to the track of the upper level disturbance.

The upper ridge shifts further east Thursday through Saturday and the amplified upper flow dampens out. Despite increasing subsidence with the ridge, ample low level moisture trapped beneath the ridge should still allow for isolated diurnally driven showers and storms. The GFS and ECMWF both show a slightly stronger upper level ridge than they did yesterday with 500 heights building to 594-595 dm. Despite the building heights, 850 temps only slowly climb from 18.6 on Thursday to 20.4 C by next Monday. Considering the increase in 500 heights and the time of year, went above MEX/NBM guidance for MaxT for the second half of the week and next weekend. Will forecast highs in the mid/upper 90's area wide. Heat index values will also be on the rise and could reach values between 103-106 degrees later this week. Global models continue to hint at a weak upper level inverted trough approaching the area early next week. Will carry slight rain chances for next Mon/Tues. 43

MARINE.

Generally light onshore flow and low seas are expected through the week as high pressure builds over the Gulf. Isolated showers and thunderstorms will be possible thanks to heating, but coverage will be much more limited compared to the past few days.

Fowler

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 98 75 98 76 99 / 30 20 10 0 10 Houston (IAH) 96 77 98 76 96 / 40 30 20 0 20 Galveston (GLS) 90 80 90 81 93 / 20 20 20 0 10

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 0 mi46 min NNE 5.1 G 7 87°F 86°F1016.1 hPa (+0.0)
GRRT2 12 mi46 min SW 4.1 G 5.1 89°F 86°F1016 hPa (+0.0)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi46 min Calm G 2.9 86°F 85°F1015.6 hPa (+0.3)
GTOT2 14 mi46 min NE 4.1 G 5.1 86°F 86°F1016.3 hPa (+0.0)
MGPT2 - 8770613 - Morgans Point, TX 14 mi46 min N 2.9 G 7 88°F 87°F1016.5 hPa (-0.0)
RLOT2 - 8770971 - Rollover Pass, TX 22 mi46 min WNW 6 G 7 84°F1016.7 hPa (+0.3)
NCHT2 - 8770777 - Manchester, TX 25 mi46 min WNW 4.1 G 6 90°F 85°F1015.8 hPa (-0.0)
HIST2 29 mi46 min Calm G 8.9 87°F 87°F1016.2 hPa (+0.0)
LUIT2 30 mi46 min NNE 2.9 G 4.1 87°F 86°F1018 hPa (+0.0)
42035 - GALVESTON 22NM East of Galveston, TX 32 mi36 min NW 5.8 G 5.8 84°F 86°F1016.1 hPa77°F
42043 - GA-252 TABS B 34 mi106 min WNW 5.8 G 7.8 86°F1016.7 hPa (+0.6)
FPST2 42 mi46 min SE 5.1 G 5.1 87°F 89°F1015.6 hPa (+0.0)

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX15 mi54 minWNW 310.00 miFair90°F75°F62%1016.9 hPa
Houston / Ellington, TX16 mi56 minW 410.00 miA Few Clouds90°F69°F52%1016.3 hPa
Houston, Pearland Regional Airport, TX17 mi53 minno data10.00 miFair91°F69°F49%1016.9 hPa
Houston, Houston Hobby Airport, TX22 mi53 minVar 510.00 miPartly Cloudy91°F72°F54%1016.7 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrN8N5N6SE8SE7SE8S8S7S8S9S6S6SW3SW3W5W4SW3W5W7W8W6W6W4NW3
1 day agoCalmN7N7N6N4NE4CalmCalmSE3S3SE3S3CalmCalmCalmCalmNW5NW4NW4NW4W3N5N5N10
2 days agoS15S17S15S17
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Tide / Current Tables for Eagle Point, Texas
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Eagle Point
Click for Map
Mon -- 02:43 AM CDT     -0.34 feet Low Tide
Mon -- 06:29 AM CDT     Moonset
Mon -- 06:41 AM CDT     Sunrise
Mon -- 10:45 AM CDT     1.05 feet High Tide
Mon -- 10:59 AM CDT     Full Moon
Mon -- 04:11 PM CDT     0.90 feet Low Tide
Mon -- 06:45 PM CDT     0.94 feet High Tide
Mon -- 08:10 PM CDT     Sunset
Mon -- 08:36 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.2-0.3-0.3-0.3-0.10.20.50.70.911110.90.90.90.90.90.90.90.80.60.4

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Mon -- 02:12 AM CDT     0.00 knots Slack
Mon -- 05:44 AM CDT     1.98 knots Max Flood
Mon -- 06:29 AM CDT     Moonset
Mon -- 06:40 AM CDT     Sunrise
Mon -- 10:59 AM CDT     Full Moon
Mon -- 01:06 PM CDT     -0.00 knots Slack
Mon -- 08:09 PM CDT     Sunset
Mon -- 08:35 PM CDT     Moonrise
Mon -- 10:10 PM CDT     -2.19 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.6-1-0.20.71.51.921.81.61.31.10.80.40-0.2-0.3-0.4-0.6-0.9-1.3-1.8-2.1-2.2-2.1

Weather Map
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wmap_A
GEOS 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 (13,3,4,5)
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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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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.