Saturday, January25, 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 7:10AMSunset 5:52PM Saturday January 25, 2020 8:27 PM CST (02:27 UTC) Moonrise 7:53AMMoonset 6:42PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 317 Pm Cst Sat Jan 25 2020
Tonight..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers and isolated Thunderstorms. Patchy fog after midnight.
Sunday..South winds 10 to 15 knots becoming southwest 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon. Patchy fog in the morning. Showers and isolated Thunderstorms.
Sunday night..Northwest winds 10 to 15 knots becoming north 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Monday..Northeast winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth.
Monday night..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and isolated Thunderstorms.
Tuesday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
Tuesday night..West winds 5 to 10 knots becoming northwest 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A chance of showers and isolated Thunderstorms.
Wednesday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Wednesday night..Northeast winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A chance of showers.
Thursday..East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
Thursday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 317 Pm Cst Sat Jan 25 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Moderate southeast winds will continue to increase over the coastal waters this evening, along with a rise in seas to around 5 to 6 feet. As a result caution flags have been posted for the nearshore waters while a small craft advisory is in effect for the offshore waters until 3 am. An extension of these advisories may be required beyond this time. Widespread rain showers with possible isolated Thunderstorms are expected across the coastal waters with the advance of a storm system this evening. Precipitation should last into the afternoon hours tomorrow. As this system departs late on Sunday a lighter offshore wind will develop. As surface high pressure departs later on Monday winds will become east to by Tuesday as the next storm system and associated rains moves across the area.


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 252347 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 547 PM CST Sat Jan 25 2020

AVIATION [00Z TAF Issuance].

Radar is picking up a few returns this evening with mainly a few showers caught in the isentropic lift through the 850mb to 700mb layers. This is fairly evident on one of the HOU AMDAR soundings and there is some drier air below this layer which precipitation may be evaporating through leading to wet-bulbing. Boundary layer should saturate up and cool slightly due to this so showers/rain will become more widespread tonight. TAFs reflect this trend along with lowering ceilings. Look for MVFR to IFR after 06Z tonight and perhaps a couple hours around 12Z to 15Z for some LIFR. May need a TEMPO for any LIFR conditions. We would not be surprised to see an isolated TS pop up in the morning around 09Z to 13Z as large scale lift increases. Rain should end 12Z to 16Z. Ceilings improve in the afternoon as the upper trough axis moves across the area.

Overpeck

PREV DISCUSSION /Issued 353 PM CST Sat Jan 25 2020/.

SHORT TERM [Tonight Through Tomorrow].

Persistent moderate southeast flow in the wake of a departing surface high has allowed for an influx of Gulf moisture across SE Texas today ahead of an advancing upper trough and associated weak coastal low. This system looks to bring widespread rain showers with the potential for isolated thunderstorms beginning after sunset tonight and lasting into the afternoon hours tomorrow. Synoptic scale guidance (i.e. GFS, ECMWF, NAM) remains in good agreement that the highest rainfall amounts associated with this system will remain offshore. As a result, have remained fairly confident that most inland areas will receive around 0.5 to 1" of total rainfall.

Some mesoscale guidance sources such as the TTU-WRF and HRRR continue to suggest the potential for the development of a band of heavier rainfall reaching inland areas overnight tonight. Should this scenario materialize, some localized rainfall totals up to 3" in and around Galveston Bay are possible. Showers and isolated thunderstorms diminish by Sunday afternoon as the coastal low pushes further eastward across the Gulf. This should be accompanied by clearer skies heading into tomorrow afternoon and evening, as well as a shift to lighter northwest winds.

Cady

LONG TERM [Monday Night Through Saturday].

The next in a series of storm systems still looks to bring our area the next batch of showers and isolated thunderstorms Monday night through Tuesday evening. After this system moves off to the east, expect a quiet/dry Wednesday. Another system brings increasing rain chances back to our area during a Thursday-Friday time period. Next weekend is still looking to be dry.

For temperatures, no lows near of below freezing are expected (most areas will be in the 40s and 50s) while highs will be in the 60s and 70s. 42

MARINE.

Moderate southeast winds continue this evening as a storm system approaches from the west. With winds reaching 15 to 20 knots in the nearshore waters and 20 to 25 knots in the offshore waters, have posted caution flags and a Small Craft advisory respectively for these areas through 3AM. As the system approaches our area this evening, look for widespread rain with isolated thunderstorms to develop across the coastal waters. As this system departs late on Sunday, a lighter offshore wind will develop and seas will diminish. Surface high pressure behind the departing system pushes eastward on Monday. Winds will become east to southeast by Tuesday as the next storm system and associated rains moves across the area.

Cady

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 56 70 45 71 50 / 60 20 0 0 20 Houston (IAH) 57 71 50 70 52 / 70 60 0 0 10 Galveston (GLS) 62 68 56 65 59 / 80 70 0 0 0

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . SMALL CRAFT SHOULD EXERCISE CAUTION until 3 AM CST Sunday for the following zones: Coastal waters from Freeport to Matagorda Ship Channel TX out 20 NM . Coastal waters from High Island to Freeport TX out 20 NM.

Small Craft Advisory until 3 AM CST Sunday for the following zones: Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM . Waters from High Island to Freeport TX from 20 to 60 NM.

SMALL CRAFT SHOULD EXERCISE CAUTION until 6 PM CST this evening for the following zones: Waters from Freeport to Matagorda Ship Channel TX from 20 to 60 NM . Waters from High Island to Freeport TX from 20 to 60 NM.



AVIATION . Overpeck


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RLOT2 - 8770971 - Rollover Pass, TX 3 mi58 min SE 9.9 G 12 62°F 57°F1018.5 hPa
HIST2 12 mi64 min SE 4.1 G 6 60°F 58°F1018.3 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi64 min SE 14 G 16 62°F 59°F1017.1 hPa
GTOT2 17 mi58 min SE 6 G 12 63°F 58°F1017.6 hPa
42035 - GALVESTON 22NM East of Galveston, TX 19 mi38 min 14 G 18 3 ft1018.9 hPa
EPTT2 - 8771013 - Eagle Point, TX 19 mi58 min ESE 8 G 9.9 60°F 59°F1017.5 hPa
GRRT2 22 mi58 min SSE 8.9 G 13 62°F 58°F1017.4 hPa
KXIH 22 mi33 min SE 16 64°F 57°F
MGPT2 - 8770613 - Morgans Point, TX 26 mi58 min SE 12 G 13 60°F 60°F1017.9 hPa
SRST2 - Sabine Pass, TX 31 mi88 min SE 8 G 9.9 60°F 1019.3 hPa (-0.3)58°F
SBPT2 - 8770570 - Sabine Pass North, TX 40 mi58 min SE 13 G 15 60°F 60°F1020.5 hPa
TXPT2 40 mi58 min SE 14 G 16 60°F 58°F1017.7 hPa
LUIT2 41 mi58 min SE 9.9 G 15 63°F 60°F1018.4 hPa
NCHT2 - 8770777 - Manchester, TX 41 mi58 min SE 5.1 G 8.9 62°F 62°F1017.3 hPa
PORT2 - 8770475 - Port Arthur, TX 42 mi58 min E 5.1 G 7 57°F 57°F1018.8 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
High Island 179A (Apache Corp), LA22 mi33 minSE 1610.00 miOvercast64°F57°F78%1017.9 hPa
Galveston, Scholes Field, TX22 mi36 minESE 910.00 miMostly Cloudy64°F57°F78%1018.4 hPa

Link to 5 minute data for KGLS

Wind History from GLS (wind in knots)
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Last 24hrS4CalmCalmCalmCalmCalmE3NE4E5E6E6E7E13E13SE14SE13SE11SE13E11E11SE10SE9SE12E9
1 day agoN15N14N11N12N10N9N10N8N10N7N4NW5NW5W3W5W3SE6SE4SE6SE5SE5S5S4S5
2 days agoSE20
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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 -- 12:55 AM CST     0.02 knots Min Flood
Sat -- 02:39 AM CST     0.12 knots Max Flood
Sat -- 03:31 AM CST     -0.00 knots Slack
Sat -- 07:11 AM CST     Sunrise
Sat -- 07:52 AM CST     Moonrise
Sat -- 09:32 AM CST     -3.23 knots Max Ebb
Sat -- 02:03 PM CST     0.00 knots Slack
Sat -- 05:15 PM CST     2.25 knots Max Flood
Sat -- 05:50 PM CST     Sunset
Sat -- 06:43 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.100.10.1-0.2-0.8-1.6-2.3-2.8-3.2-3.2-2.8-2.1-1.1-0.111.92.22.21.91.51.10.60.3

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 (21,6,7,8)
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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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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.