Tuesday, August11, 2020
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Marine Weather and Tides
Jones Creek, 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 6:47AMSunset 8:06PM Tuesday August 11, 2020 2:43 PM CDT (19:43 UTC) Moonrise 11:58PMMoonset 12:48PM Illumination 46% Phase: Third Quarter Moon; Moon at 23 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- 948 Am Cdt Tue Aug 11 2020
Rest of today..South winds 5 to 10 knots. Seas 2 to 3 feet.
Tonight..South winds 10 to 15 knots. Seas 2 to 3 feet.
Wednesday..South winds 5 to 10 knots becoming southeast in the afternoon. Seas 2 to 3 feet.
Wednesday night..South winds 10 to 15 knots. Seas 2 to 3 feet.
Thursday..South winds 5 to 10 knots. Seas 2 feet. A slight chance of showers and Thunderstorms in the morning.
Thursday night..South winds 10 to 15 knots. Seas 2 feet.
Friday..South winds 5 to 10 knots. Seas 2 feet. A slight chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Seas 2 feet.
Saturday..Southeast winds 5 to 10 knots. Seas 2 feet. A slight chance of showers and Thunderstorms.
Saturday night..South 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 948 Am Cdt Tue Aug 11 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore flow will persist through early next week as a surface high pressure remains centered over the gulf of mexico. Seas are expected to be from 2 to 3 ft through Wednesday and from 1 to 2 feet through early next week. Isolated showers and Thunderstorms will be possible at times, with increasing chances into early next week.


7 Day Forecast for Marine Location Near Jones Creek, TX
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location: 28.77, -95.61     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 111719 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1219 PM CDT Tue Aug 11 2020

AVIATION [18Z TAF Issuance]. VFR conditions and light to moderate south to southwest winds are expected through most of the period. A few showers and thunderstorms will be possible this afternoon, but did not include VCSH/VCTS in TAFs due to low confidence in coverage. If storms develop, gusty winds up 20 knots will be possible. Few to scattered MVFR conditions will again be possible mainly between 10Z-14Z Wednesday across most terminals.

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PREV DISCUSSION. /ISSUED 1057 AM CDT Tue Aug 11 2020/

UPDATE . Latest radar and satellite imagery are showing scattered showers developing along and south of I-10, with better activity around the Matagorda Bay region. This is in response to a weak area of low-level convergence, PWs values around 1.9 inches and daytime heating. As we head into the afternoon hours, instability increases; therefore, isolated thunderstorms are possible. Have adjusted PoPs for the rest of the day with low-end precipitation chances into late afternoon. The bulk of this activity is expected to remain along and south of I-10.

05

PREV DISCUSSION . /ISSUED 421 AM CDT Tue Aug 11 2020/

SHORT TERM [Today Through Tomorrow Night] .

Its hot y'all. Not much else happening in SE Texas other than a lot of heat. A few isolated showers in the morning along the coastal counties, and chances of afternoon showers and thunderstorms brought inland by the seabreeze. Yup, sounds like we've heard this recently. So how hot, you ask? Today our max temperatures are looking to be in the mid to upper 90s and heat index values ranging in the mid to upper 100s. Some northern counties could see heat advisories today for a few hours. Tomorrow is about the same as its looking today, not a big surprise, huh? 35

LONG TERM [Thursday through Tuesday] .

With the 250/500 hPa upper ridge axis remaining well-established over the Rockies, the current seasonably warm pattern should persist through the remainder of the work week and into the weekend. The main forecast concern in the extended period continues to be the possibility of dangerous heat. High temperatures remain on track to reach the mid 90s across the Houston metro area each afternoon, with areas northwest of the I-610 loop potentially breaking into the triple digits. As broad surface high pressure over the Central Gulf and lower pressures near the Four Corners region continue to maintain a steady onshore flow across SE Texas, surface dew points will remain elevated in the mid to upper 70s during this time. As a result, daily maximum heat index values will reach the upper 100s, potentially exceeding the advisory threshold of 108. While we haven't had to issue a Heat Advisory thus far this week, this will continue to remain a possibility as we head into the weekend. Those heading outdoors should continue to take the proper steps to protect themselves from heat-related illnesses.

Diurnally driven showers and thunderstorms continue to remain a possibility through the remainder of the week, although more limited PW availability may initially stifle development before a surge of moisture brings back values along the coast towards the 1.75 - 2.0 in range by Friday and Saturday. Any developing precipitation should follow the typical summertime pattern which we've experienced over the past few days, with initial showers and storms developing offshore in the morning hours and propagating inland along the sea breeze boundary as the day progresses. Have maintained 15-25% PoPs through the end of the work week in line with most recent national blended guidance, with values increasing on Saturday and Sunday as surface moisture availability becomes more favorable.

A chance for more widespread precipitation will come as we head into the early part of next week as a shortwave trough progresses along the east side of the prevailing ridge, with the associated 500 hPa vorticity max passing northeast of the CWA. With surface PW values increasing above the 2.0 in thresholds as this feature progresses, conditions should be favorable for the development of scattered showers and storms on Monday and Tuesday. Have currently included 20- 30% Day 7/8 PoPs across most of the area but these could potentially increase over the next few days as forecast confidence increases.

Cady

MARINE .

High pressure in the central gulf keeps light onshore flow will persist through the forecast period with seas remaining at 1-3ft. Some higher onshore flow can be expected early in the night. A few isolated showers and thunderstorms can be seen in the early morning and evening hours. 35

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 76 99 76 99 76 / 0 0 0 10 0 Houston (IAH) 78 96 77 97 78 / 0 20 0 20 0 Galveston (GLS) 83 91 82 92 82 / 10 20 0 20 10

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNT2 0 mi56 min S 8 G 9.9 88°F 89°F1015 hPa
EMAT2 17 mi56 min SSE 8.9 G 11 87°F 91°F1014.9 hPa
FPST2 20 mi56 min SSE 9.9 G 12 86°F 89°F1014.5 hPa
LUIT2 33 mi56 min S 11 G 14 88°F 88°F1016.9 hPa
42043 - GA-252 TABS B 40 mi104 min S 5.8 G 7.8 87°F1016.2 hPa (-0.6)
MBET2 45 mi56 min S 11 G 13 86°F 87°F1014 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 47 mi56 min S 9.9 G 13 86°F 91°F1015 hPa

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, TX19 mi49 minS 810.00 miPartly Cloudy92°F76°F60%1015.2 hPa

Link to 5 minute data for KBYY

Wind History from BYY (wind in knots)
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Tide / Current Tables for Freeport Harbor, Texas
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Freeport Harbor
Click for Map
Tue -- 12:22 AM CDT     Moonrise
Tue -- 01:57 AM CDT     1.06 feet Low Tide
Tue -- 06:48 AM CDT     Sunrise
Tue -- 06:57 AM CDT     1.24 feet High Tide
Tue -- 11:47 AM CDT     Last Quarter
Tue -- 01:47 PM CDT     Moonset
Tue -- 03:56 PM CDT     0.15 feet Low Tide
Tue -- 08:04 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.11.11.11.11.21.21.21.21.21.110.80.50.30.20.20.20.30.40.60.811.2

Tide / Current Tables for Freeport Harbor, Texas (2)
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Freeport Harbor
Click for Map
Tue -- 12:22 AM CDT     Moonrise
Tue -- 01:38 AM CDT     1.35 feet Low Tide
Tue -- 06:48 AM CDT     Sunrise
Tue -- 07:52 AM CDT     1.52 feet High Tide
Tue -- 11:47 AM CDT     Last Quarter
Tue -- 01:47 PM CDT     Moonset
Tue -- 04:00 PM CDT     0.42 feet Low Tide
Tue -- 08:04 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.41.31.41.41.51.51.51.51.51.41.210.80.60.50.40.50.50.70.91.11.31.4

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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Gulf Stream Current


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Disclaimer:
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.