Sunday, August9, 2020
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Marine Weather and Tides
Matagorda, 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 6:48AMSunset 8:10PM Sunday August 9, 2020 2:36 PM CDT (19:36 UTC) Moonrise 10:54PMMoonset 11:04AM Illumination 67% 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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GMZ350 Coastal Waters From Freeport To Matagorda Ship Channel Tx Out 20 Nm- Waters From Freeport To Matagorda Ship Channel Tx From 20 To 60 Nm- 1016 Am Cdt Sun Aug 9 2020
Rest of today..South winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms in the late morning and early afternoon.
Tonight..Southeast winds 10 to 15 knots. Seas 3 feet.
Monday..Southeast winds 10 to 15 knots. Seas 3 feet.
Monday night..Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Tuesday..South winds around 10 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms.
Tuesday night..South winds 10 to 15 knots. Seas 2 feet.
Wednesday..South winds around 10 knots. Seas 2 feet. A slight chance of showers and Thunderstorms.
Wednesday night..South winds 10 to 15 knots. Seas 2 feet.
Thursday..Southeast winds around 10 knots. Seas 2 feet. A slight chance of showers and Thunderstorms.
Thursday night..Southeast winds 10 to 15 knots. Seas 2 feet.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1016 Am Cdt Sun Aug 9 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Surface high pressure over the eastern gulf of mexico will continue to bring light winds and low seas to the area through early next week.


7 Day Forecast for Marine Location Near Matagorda, TX
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location: 28.69, -95.88     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 091724 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1224 PM CDT Sun Aug 9 2020

AVIATION. High PW air and low convective temperatures should allow for some showers and thunderstorms this afternoon. Coverage is expected to increase by 18z and should persist until heating wanes. Generally clear skies will develop this evening in the wake of the convection with cirrus gradually thinning between 02-06z. A brief window of MVFR ceilings will be possible Monday morning as moisture is briefly trapped beneath a building cap near 850 mb. Strong heating will mix out any low ceilings with VFR conditions expected for the rest of Monday. PW values drop considerably on Monday and capping increases, so no precipitation is expected at this time. 43

PREV DISCUSSION. /ISSUED 1021 AM CDT Sun Aug 9 2020/

UPDATE .

CAMs remain aggressive with rain chances today and this seems reasonable as PW values climb to almost 2.25 inches and SE TX will lie on the east side of a weak inverted trough axis. Convective temperatures range from about 88 degrees near the coast to around 93 degrees well inland. Tweaked sky grids and lowered MaxT a degree or so based on expected cloud cover and precip. 43

PREV DISCUSSION . /ISSUED 454 AM CDT Sun Aug 9 2020/

SHORT TERM [Today Through Tomorrow Night] .

Some coastal showers near the Galveston Bay area will slowly build up and move inland through the morning. The rest of the day will be partly cloudy skies and showers building and thunderstorms building as afternoon heating reaches convective temperatures. Most storms will be along the I-10 corridor as showers that move inland build. This mixed with some sea breeze in the area will help build and enhance these storms. After sunset, storms will dissipate or move out of the area. Ambient temperatures are expected to reach the low 90s along the coast and almost 100 further inland with heat indices in the mid to upper 100s.

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LONG TERM [Tuesday through Sunday] .

If you've enjoyed the warm and humid conditions with isolated thunderstorms over the past few days . you're in luck. As persistent upper ridging remains the dominant synoptic feature across SE Texas, seasonably warm conditions with diurnally driven precipitation will remain the story through the upcoming work week. The presence of surface high pressure over the central Gulf of Mexico will continue to support a light but persistent onshore flow pattern through the extended forecast period, with surface PW values rebounding to near 2.0 in by Wednesday as deepening pressure over western TX will create a relatively stronger surface pressure gradient. While forecast soundings show favorable instability for convective development through mid-week, precipitation chances will be moderated by upper-level subsidence associated with the aforementioned ridge. Nonetheless, there are likely to be some scattered to isolated thunderstorms driven by diurnal effects each morning and afternoon as the sea breeze boundary propagates inland. As a result, have continued to maintain 15-30% PoPs along the coast and south of the I-10 corridor through the extended forecast period.

Heat remains a concern in the coming work week. Daily high temperatures across the Houston metro remain on track to reach the mid to upper 90s through the end of the week, with some areas north of I-10 expected to rise above 100. As the persistent onshore flow continues to keep dew points fairly high, elevated heat indicies will be something to watch for closely in the coming days. Daily maximum heat index values should reach 105-110 in most locations, which raises the possibility of heat advisories. Practicing heat safety will be especially important during this time, particularly if you work outside or are planning any other outdoor activities. Low temperatures should consistently remain in the upper 70s to low 80s . which could threaten to break some additional daily high minimum temperature records in the coming days.

Cady

MARINE .

Light onshore flow will persist through the forecast period with seas remaining at 1-2ft with some peak times of 3ft. Some higher onshore flow can be expected early in the night. Some isolated showers and thunderstorms can be seen in the early morning and evening hours.

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PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 97 76 98 76 99 / 20 10 10 0 10 Houston (IAH) 94 77 95 78 95 / 50 30 20 0 20 Galveston (GLS) 92 83 90 83 91 / 40 10 10 10 20

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

Discussion . 99 Aviation/Marine . 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EMAT2 2 mi49 min S 9.9 G 15 87°F 91°F1018.7 hPa
SGNT2 15 mi49 min S 8 G 9.9 88°F 89°F1018.9 hPa
MBET2 30 mi49 min SSW 13 G 14 86°F 88°F1017.8 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 32 mi49 min S 11 G 16 86°F 90°F1018.6 hPa
FPST2 35 mi49 min SSW 9.9 G 11 86°F 90°F1018.5 hPa
VCAT2 39 mi49 min S 14 G 16 88°F 1018.4 hPa
LUIT2 48 mi49 min S 9.9 G 13 89°F 88°F1020.7 hPa
SDRT2 - 8773037 - Seadrift, TX 48 mi49 min ESE 8.9 G 13 87°F 89°F1019 hPa

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX20 mi44 minS 11 G 1810.00 miFair90°F78°F68%1018.7 hPa
Bay City, Bay City Municipal Airport, TX20 mi42 minSSE 1010.00 miMostly Cloudy91°F76°F62%1019 hPa

Link to 5 minute data for KBYY

Wind History from BYY (wind in knots)
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Last 24hrS10S10S9S9S7SE4E4SE3S4CalmS4CalmCalmSE3CalmCalmCalmCalmSE3SW5S9
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1 day agoSE9S6SE9SE8S7SE4CalmCalmSE3SE3CalmCalmCalmCalmCalmCalmCalmCalmSE3SE5S8S7S10S11
2 days agoSE8SE9S8SE6SE8SE4SE4CalmCalmSE3SE3SE3CalmCalmCalmCalmCalmCalmSE3SE4S5S6SE6S3

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Sun -- 04:07 AM CDT     0.11 feet Low Tide
Sun -- 06:52 AM CDT     Sunrise
Sun -- 10:44 AM CDT     0.25 feet High Tide
Sun -- 12:05 PM CDT     Moonset
Sun -- 04:23 PM CDT     0.17 feet Low Tide
Sun -- 08:09 PM CDT     Sunset
Sun -- 11:29 PM CDT     0.27 feet High Tide
Sun -- 11:55 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.20.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.3

Tide / Current Tables for Pass Cavallo, Texas
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Pass Cavallo
Click for Map
Sun -- 12:33 AM CDT     0.63 feet Low Tide
Sun -- 06:52 AM CDT     Sunrise
Sun -- 08:50 AM CDT     1.15 feet High Tide
Sun -- 12:05 PM CDT     Moonset
Sun -- 01:57 PM CDT     0.56 feet Low Tide
Sun -- 08:09 PM CDT     Sunset
Sun -- 10:11 PM CDT     1.01 feet High Tide
Sun -- 11:55 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.70.70.80.911.11.11.11.10.90.70.60.60.60.60.70.80.80.9111

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 (15,3,4,5)
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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.