Friday, September25, 2020
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Marine Weather and Tides
Bay City, TX

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:13AMSunset 7:17PM Friday September 25, 2020 7:06 AM CDT (12:06 UTC) Moonrise 2:50PMMoonset 12:23AM Illumination 58% Phase: First Quarter Moon; Moon at 8 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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GMZ330 Matagorda Bay- 417 Am Cdt Fri Sep 25 2020
Today..North winds around 5 knots becoming southeast 5 to 10 knots in the afternoon. Bay waters smooth.
Tonight..Southeast winds 5 to 10 knots. Bay waters smooth.
Saturday..Southeast winds 5 to 10 knots. Bay waters smooth.
Saturday night..South winds around 10 knots. Bay waters smooth to slightly choppy.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy. Isolated showers and Thunderstorms after midnight.
Monday..South winds 5 to 10 knots becoming north 20 to 25 knots in the afternoon. Bay waters smooth becoming rough in the afternoon. A chance of showers and Thunderstorms.
Monday night..North winds 20 to 25 knots. Bay waters rough.
Tuesday..North winds 15 to 20 knots. Bay waters choppy.
Tuesday night..Northeast winds 10 to 15 knots becoming north around 5 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 417 Am Cdt Fri Sep 25 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds should resume this weekend ahead of a strong cold front that is expected to move into the coastal waters on Monday. Strong northerly winds, with gusts possibly close to gale force Monday night, can be expected in the wake of the front. Winds and seas should gradually subside into midweek.


7 Day Forecast for Marine Location Near Bay City, TX
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location: 28.95, -95.94     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 250934 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 434 AM CDT Fri Sep 25 2020

SHORT TERM [Today through Sunday Night].

Widespread wraparound clouds that has lingered over the area for much of the last day or so, appear to be slowly eroding from the W and SW this morning. With the skies clearing, the still rather wet grounds and low dewpoint spreads, we could see the rapid de- velopment of patchy fog (some possibly dense) across portions of the CWFA through the rest of this morning. Visibilities may be a little slow to improve given the very light low-level winds, but will be expecting these conditions to mix out by late morning . along with the clouds by afternoon. Warmer temperatures (via the decreased clouds) are on tap for today . with highs in the lower to mid 80s.

As surface high pressure develops over the SE U.S., winds across the region are forecast to become more S/SE by Sat. This onshore flow is not expected to strengthen too much over the weekend but it will help draw some Gulf moisture back into the area. Still a bit wary on the idea of fog developing tonight/early Sat but not totally ruling it out either. Temperatures will continue to warm through the weekend . highs in the mid 80s Sat and mid/upper 80s (maybe even around 90) on Sun. Rain chances will also remain at/ near none for the majority of this forecast period but we cannot rule out some WAA-type showers early Sun morning along the coast and the nearshore waters. However, our "best" chances are likely going to be late Sun night (across our northern counties) as the next cold front begins it push down from the Plains. 41

LONG TERM [Monday Through Friday].

Upper trof digs southward into the Plains and into the eastern states as ridging takes shape across the western parts of the country.

Resulting deep layer northerly flow should push a legitimate cold front across the region and into the Gulf on Monday. PW's aren't too impressive in advance (maybe ~1.5") and llvl flow veers to the sw ahead of the sfc boundary, but there should be enough convergence along the front to generate perhaps a thin band of precipitation as it moves through. Really nice wx should persist in its wake with lows in the 50s inland & 60s coast, and highs in the 78-84 degree range.

Upper pattern really doesn't change all that much for the remainder of the week and most of the medium range guidance suggests a reinforcing surge of drier air making its way into the region Thur- Fri. 47

MARINE.

Water levels remain about a foot above normal with high tides peaking a touch over 3 feet, but mostly below coastal flood concerns. Still may need to keep an eye on things later this weekend as onshore flow resumes and seas inch upward, but even then main concern would be a few hours before/after high tide times.

A strong cold front should push into the waters Monday with SCA's expected in its wake for moderate-strong north winds and building seas. With water temps in the upper 70s, wouldn't doubt if we see some wind gusts closer to gale force Monday night as thermal gradient plays a role as well. Winds/seas subside toward midweek, though it appears we'll see a reinforcing front move in Thurs-Fri which would cause them to pick back up. 47

AVIATION [12Z TAF Issuance].

We will likely be dealing with the persistent MVFR deck lingering over the bulk of the CWA at the start of this TAF cycle. But with this deck slowly eroding from the W/SW . some sites (CLL/LBX) may be dealing with the development of patchy (possibly dense) fog at that time. Based on the extrapolated clearing trends, these lower VIS/CIGS could affect the rest of the sites briefly (13-16Z). VFR conditions are expected for much of the area by this afternoon as weak high pressure develops. These clearing skies and light winds could give us another round of patchy fog/low clouds tonight into early Sat morning. 41


PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 84 63 85 67 89 / 0 0 0 0 10 Houston (IAH) 84 68 86 70 90 / 0 0 0 0 10 Galveston (GLS) 83 75 85 77 87 / 10 0 10 10 10

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . NONE.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EMAT2 17 mi49 min N 2.9 G 4.1 68°F 76°F1013.3 hPa
SGNT2 21 mi49 min NW 1.9 G 2.9 68°F 76°F1013.4 hPa
FPST2 34 mi49 min N 5.1 G 6 69°F 83°F1012.8 hPa
VCAT2 41 mi49 min E 2.9 G 4.1 71°F 75°F1013.7 hPa
MBET2 42 mi49 min E 4.1 G 4.1 73°F 79°F1012.5 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 42 mi55 min ENE 1.9 G 4.1 73°F 80°F1013.3 hPa
LUIT2 44 mi49 min N 7 G 8.9 71°F 77°F1015 hPa
42043 - GA-252 TABS B 55 mi127 min NNE 3.9 G 5.8 80°F1013.2 hPa (-0.0)

Wind History for USCG Freeport, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay City, Bay City Municipal Airport, TX4 mi72 minN 00.75 miFog/Mist65°F65°F99%1013.9 hPa
Palacios Municipal Airport, TX23 mi75 minN 01.25 miFog/Mist65°F64°F100%1013.7 hPa
Wharton, Wharton Regional Airport, TX24 mi72 minN 010.00 miPartly Cloudy67°F64°F91%1014.2 hPa

Link to 5 minute data for KBYY

Wind History from BYY (wind in knots)
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Last 24hrCalmCalmN4NW6N6NW5N4N5N6NW7N5N3CalmCalmCalmN5N3CalmCalmCalmCalmCalmCalmCalm
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SE9SE8NE3NE4N6N4NW4CalmCalmNW5W9W8W10NW9NW11
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Tide / Current Tables for Freeport Harbor, Texas
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Freeport Harbor
Click for Map
Fri -- 01:20 AM CDT     Moonset
Fri -- 01:42 AM CDT     2.14 feet High Tide
Fri -- 07:11 AM CDT     Sunrise
Fri -- 03:47 PM CDT     Moonrise
Fri -- 05:38 PM CDT     -0.12 feet Low Tide
Fri -- 07:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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22.12.12.12.121.91.81.71.71.61.51.310.60.30-0.1-0.1-00.20.611.4

Tide / Current Tables for Freeport Harbor, Texas (2)
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Freeport Harbor
Click for Map
Fri -- 01:20 AM CDT     Moonset
Fri -- 02:05 AM CDT     2.44 feet High Tide
Fri -- 07:11 AM CDT     Sunrise
Fri -- 03:47 PM CDT     Moonrise
Fri -- 05:34 PM CDT     0.13 feet Low Tide
Fri -- 07:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.32.42.42.42.42.32.22.1221.91.71.51.20.90.50.30.20.10.30.50.91.31.7

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
Ground Weather Radar Station Houston/Galveston, TX
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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.