Saturday, July11, 2020
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Marine Weather and Tides
Bolivar Peninsula, 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 6:26AMSunset 8:22PM Saturday July 11, 2020 3:39 PM CDT (20:39 UTC) Moonrise 11:49PMMoonset 11:23AM Illumination 61% Phase: Waning Gibbous; Moon at 21 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- 1033 Am Cdt Sat Jul 11 2020
This afternoon..Southwest winds 5 to 10 knots becoming south. Bay waters smooth.
Tonight..South winds 10 to 15 knots becoming southwest after midnight. Bay waters slightly choppy becoming smooth to slightly choppy after midnight.
Sunday..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon.
Sunday night..Southwest winds 10 to 15 knots. Bay waters slightly choppy.
Monday..Southwest winds around 10 knots becoming south in the afternoon. Bay waters smooth to slightly choppy becoming slightly choppy in the afternoon.
Monday night..Southwest winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday..South winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Wednesday..South winds 10 to 15 knots. Bay waters slightly choppy.
Wednesday night..South 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 1033 Am Cdt Sat Jul 11 2020
Synopsis for high island to matagorda ship channel out 60 nm.. A light to moderate southerly flow will become more southwesterly over the weekend as a surface high pressure moves over the western gulf. Wind speeds will typically be highest offshore at night and in the bays in the afternoons. Small craft exercise caution conditions will be possible at times.


7 Day Forecast for Marine Location Near Bolivar Peninsula CDP, TX
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location: 29.49, -94.56     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 112036 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 336 PM CDT Sat Jul 11 2020

SHORT TERM [Tonight through Tomorrow/Sunday].

Heat Advisory re-issued for tomorrow.

Not a lot of changes to the forecast as this hot/dry pattern con- tinues into tomorrow. Light southwesterly low-level flow combined with elevated 85h temps and ridging aloft will all help keep this muggy weather in place. Brief/patchy low clouds are possible over northern portions of the CWA overnight, but should mix out by mid to late tomorrow morning . with mostly sunny skies prevailing the rest of the day. As such did go ahead and re-up the Heat Advisory for tomorrow. 41

LONG TERM [Sunday Night through Saturday].

Little change has been made to the long term forecast. Mid/upper level high pressure initially centered off to our west will expand and work its way off to the central parts of the nation. At the surface, onshore winds will persist with high pressure generally situated off to our east. For a majority of the area, the return of any rains will likely hold off until the mid/upper level high gets far enough off to our north to allow for some deeper moisture to work its was westward across the Gulf of Mexico and towards our area. This might hold off until the end of the week or possibly not until next weekend. The heat will continue to remain the main weather feature across the area for much of the upcoming week with heat index values expected to peak in a 105 to 110 range. Heat Advisories might be needed. 42

CLIMATE.

How hot has July been so far? For the first ten days of the month .

- the College Station area's average temperature has been 86.5 degrees which ranks as the 15th warmest July 1-10 period on record.

- the City of Houston's average temperature has been 87.7 degrees which ranks as the 4th warmest July 1-10 period on record.

- the Houston Hobby average temperature has been 87.7 degrees which ties for the 2nd warmest July 1-10 period on record.

- WINNER . the Galveston area's average temperature has been 87.2 degrees which ranks as the warmest July 1-10 period on record.

42

MARINE.

Overall fair weather in the waters over the next few days. High pressure will keep winds southwesterly to southerly. Some gusty conditions nearshore will be possible near sunset but will be localized mainly in the bay areas.Seas will remain on average at 2-3ft. 35

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 76 102 78 102 76 / 0 0 0 0 0 Houston (IAH) 78 101 79 100 79 / 0 0 0 0 0 Galveston (GLS) 81 94 82 92 83 / 0 0 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES. TX . Heat Advisory until 8 PM CDT this evening for the following zones: Austin . Brazoria Islands . Brazos . Burleson . Chambers . Coastal Brazoria . Coastal Galveston . Coastal Harris . Coastal Jackson . Coastal Matagorda . Colorado . Fort Bend . Galveston Island and Bolivar Peninsula . Grimes . Houston . Inland Brazoria . Inland Galveston . Inland Harris . Inland Jackson . Inland Matagorda . Madison . Matagorda Islands . Montgomery . Northern Liberty . Polk . San Jacinto . Southern Liberty . Trinity . Walker . Waller . Washington . Wharton.

Heat Advisory from 11 AM to 8 PM CDT Sunday for the following zones: Austin . Brazoria Islands . Brazos . Burleson . Chambers . Coastal Brazoria . Coastal Galveston . Coastal Harris . Coastal Jackson . Coastal Matagorda . Colorado . Fort Bend . Galveston Island and Bolivar Peninsula . Grimes . Houston . Inland Brazoria . Inland Galveston . Inland Harris . Inland Jackson . Inland Matagorda . Madison . Matagorda Islands . Montgomery . Northern Liberty . Polk . San Jacinto . Southern Liberty . Trinity . Walker . Waller . Washington . Wharton.

GM . NONE.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RLOT2 - 8770971 - Rollover Pass, TX 3 mi52 min SSW 6 G 8.9 88°F1016.4 hPa
HIST2 12 mi52 min SSW 8.9 G 14
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi52 min S 7 G 8
GTOT2 17 mi52 min S 5.1 G 9.9 89°F 87°F1016.3 hPa
42035 - GALVESTON 22NM East of Galveston, TX 19 mi30 min SSW 5.8 G 7.8 85°F 86°F1015.8 hPa81°F
EPTT2 - 8771013 - Eagle Point, TX 19 mi52 min SE 8.9 G 9.9 88°F 90°F1015.8 hPa
GRRT2 22 mi52 min SSW 8 G 11 88°F 91°F1015.8 hPa
MGPT2 - 8770613 - Morgans Point, TX 26 mi52 min ESE 8.9 G 11 92°F 88°F1015.9 hPa
42043 - GA-252 TABS B 39 mi100 min S 7.8 G 7.8 84°F1017.2 hPa (-1.0)
SBPT2 - 8770570 - Sabine Pass North, TX 40 mi52 min SW 8 G 14 91°F 88°F1017.6 hPa
TXPT2 40 mi52 min SW 12 G 17 87°F 88°F1013.9 hPa
LUIT2 41 mi52 min S 11 G 16 87°F 80°F1017.8 hPa
NCHT2 - 8770777 - Manchester, TX 41 mi52 min SSW 1 G 4.1 94°F 89°F1015.4 hPa
PORT2 - 8770475 - Port Arthur, TX 42 mi52 min WNW 1.9 G 4.1 92°F 88°F1015.4 hPa

Wind History for Rollover Pass, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX22 mi48 minS 1110.00 miFair91°F79°F68%1016.6 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrS10S13S12S11S8S6S8S9S10S9SW7SW5SW7SW7SW6SW5SW64W6SW6S10S11S11S11
1 day agoS11S12S13S11S11S7S8S7S9S6S6S7S10S9S6S4S6S6S7S9S9SE10SE9S12
2 days agoS14S13S11S10S10S9S9S9S8S12S12S13S13S11S9S9S7S9S10S11S14S13S11S14

Tide / Current Tables for Rollover Pass, 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 Galveston Bay Entrance, Texas Current
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Galveston Bay Entrance
Click for Map
Sat -- 12:20 AM CDT     Moonrise
Sat -- 02:26 AM CDT     -1.39 knots Max Ebb
Sat -- 06:27 AM CDT     Sunrise
Sat -- 07:01 AM CDT     0.00 knots Slack
Sat -- 09:50 AM CDT     1.10 knots Max Flood
Sat -- 12:23 PM CDT     Moonset
Sat -- 02:17 PM CDT     -0.00 knots Slack
Sat -- 06:23 PM CDT     -0.69 knots Max Ebb
Sat -- 08:21 PM CDT     Sunset
Sat -- 09:56 PM CDT     -0.11 knots Min Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.2-1.3-1.4-1.4-1.2-0.8-0.5-00.511.10.90.70.40.1-0.2-0.5-0.6-0.7-0.7-0.5-0.2-0.1-0.2

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 (16,3,4,5)
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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.