Thursday, December12, 2019
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Marine Weather and Tides
Richmond, TX

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:07AMSunset 5:26PM Thursday December 12, 2019 8:14 AM CST (14:14 UTC) Moonrise 6:05PMMoonset 7:28AM Illumination 99% Phase: Full Moon; Moon at 16 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- 253 Am Cst Thu Dec 12 2019
Today..Northeast winds around 10 knots. Bay waters smooth to slightly choppy.
Tonight..Northeast winds 5 to 10 knots. Bay waters smooth.
Friday..Northeast winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Friday night..Southwest winds around 10 knots becoming northwest after midnight. Bay waters smooth to slightly choppy becoming smooth after midnight.
Saturday..North winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth.
Saturday night..Southeast winds 5 to 10 knots. Bay waters smooth.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers late in the afternoon.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers. A chance of Thunderstorms in the late evening and overnight.
Monday..West winds 15 to 20 knots becoming northwest in the afternoon. Bay waters choppy. Thunderstorms in the morning. Showers. A chance of Thunderstorms in the afternoon.
Monday night..North winds 15 to 20 knots. Bay waters choppy. A slight chance of showers in the evening.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 253 Am Cst Thu Dec 12 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Winds and seas gradually subside today. With high pressure situated over the eastern seaboard and lower pressure in the yucatan and west central gulf, northeast to east winds will prevail through Thursday night. Onshore winds return to the area on Saturday night and Sunday. Another strong cold front is expected to move through the area on Monday.


7 Day Forecast for Marine Location Near Richmond, TX
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location: 29.58, -95.75     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 121147 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 547 AM CST Thu Dec 12 2019

AVIATION. Some 3500-4000 foot ceilings continue to decrease in coverage early this morning, and a majority of locations should be VFR for most of the day with winds between east and south and staying below 10 knots. Might see increasing clouds again tonight through tomorrow morning with possible MVFR ceiling development around 2500-3000 feet. 42

PREV DISCUSSION. /ISSUED 336 AM CST Thu Dec 12 2019/

DISCUSSION .

A weekend of mostly quiet weather remains ahead - we'll begin with temperatures a little below normal, with gradual warming through Sunday despite a very weak cold front on Saturday. A stronger cold front is expected on Monday, which will bring our next chance for showers and storms, along with colder conditions next week.

SHORT TERM [Through Friday] .

Quiet weather can be expected through Friday. Clouds are increasing from south to north across the area early this morning, and expect this trend to continue throughout the day. After a cold start to the morning, look for temperatures to warm up into to 60s for much of the area. Tonight and tomorrow look similar to today with slightly warmer temperatures (both lows and highs).

LONG TERM [Friday Night Through Thursday] .

Friday night will feature a very weak cold front moving through as a new surface high settles over Southeast Texas on Saturday. How will you know the front passed? Well, you probably won't. Rain chances are virtually nil, and temperatures Saturday are expected to be near or even a teensy bit warmer than Friday. About the only indicator will be the shift of winds from southwesterly on Friday to northwesterly by Saturday morning, becoming southeasterly by Saturday night as the high drifts east of us.

As onshore flow returns, we'll begin to start the process of moisture return ahead of the next front. After a pause in the warmup on Saturday, temperatures should be decidedly (10 or more degrees) above normal on Sunday.

The upper trough supporting the next front will be dropping off the Rockies Sunday night. Beyond the consistency in the broad scale pattern though, there is an enormous spread of the low pressure feature at lower levels and the surface. The Euro speeds troughing from 700 mb down way out to around St. Louis, forming up the surface low far to our east, and giving us a glancing blow as the front rolls through. The GFS is much slower, forming up a surface low over North Texas And. while it doesn't really strengthen much until it's past us, gives us a bit more of a traditional frontal passage.

With such a wide spread in the guidance, it's probably no surprise that the forecast largely resembles a blend of the guidance, tweaked a bit for known weaknesses of this blending around sharp discontinuities like fronts. This starts the front moving in from the northwest into spots like B/CS, Madisonville, and Crockett before dawn on Monday, passing through Houston mid-to-late- morning, and shoving across the Gulf waters through the afternoon. This peaks rain chances for most of the area on Monday morning. If so, while there would surely be potential for thunderstorms, it would focus any severe threat to our east.

Just . don't get tied to this timing. With such important details needed to be ironed out, things can certainly still shift by several hours. This could have important implications on sensible weather with the frontal passage So. we're very confident in a front passing early next week, bringing rain and some thunderstorms Beyond that. things are still more up in the air. Odds probably favor a scenario with light to moderate rain showers and some isolated thunderstorms, but confidence here is much lower than the general idea.

MARINE .

Seas have remained elevated early this morning, and have gone ahead and issued a Small Craft Advisory for the offshore waters and Caution Flags for the nearshore waters. Still anticipating gradual improvement to begin this morning. Otherwise, a NE/E flow will persist into early Friday as a trof/surface low moves to the north then eventually northeast. Winds will gradually back to more of a westerly direction as this feature makes its way toward the northeastern Gulf coast. There remains some uncertainty in regards to wind directions on Saturday, but an onshore flow should become more prevalent Sunday and Sunday night ahead of the next stronger cold front on Monday. A Small Craft Advisory will likely be needed in the wake of that front.

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 61 45 71 43 70 / 0 0 0 0 0 Houston (IAH) 62 48 70 47 70 / 0 0 10 0 0 Galveston (GLS) 62 56 67 55 68 / 0 0 10 0 0

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . SMALL CRAFT SHOULD EXERCISE CAUTION until 10 AM CST this morning 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 10 AM CST this morning 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.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 28 mi62 min NE 5.1 G 6 44°F 64°F1025.4 hPa
MGPT2 - 8770613 - Morgans Point, TX 41 mi62 min ENE 8.9 G 9.9 47°F 63°F1025.9 hPa
EPTT2 - 8771013 - Eagle Point, TX 45 mi62 min NE 14 G 16 49°F 57°F1024.9 hPa
LUIT2 48 mi56 min ENE 16 G 20 55°F 58°F1026.1 hPa
GRRT2 49 mi62 min E 12 G 16 51°F 57°F1025.1 hPa
FCGT2 - 8772447 - USCG Freeport, TX 50 mi56 min ENE 12 G 16 56°F 61°F

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Sugar Land Municipal / Hull Field Airport, TX6 mi21 minENE 610.00 miFair48°F37°F68%1025.8 hPa
Houston Southwest Airport, TX15 mi19 minE 410.00 miFair46°F40°F80%1026.1 hPa
Houston Executive Airport, TX17 mi19 minN 010.00 miFair45°F39°F81%1026.1 hPa
John Dunn Helistop, TX21 mi39 minNNE 810.00 miFair45°F35°F71%1025.1 hPa

Link to 5 minute data for KSGR

Wind History from SGR (wind in knots)
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Last 24hrN12N12NE9N8NE8NE11NE10NE8NE6NE7NE5NE5NE3N3CalmNE3N4NE7NE5NE5E7SE6E7E6
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2 days agoS7SW9SW13SW11SW12SW17
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Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
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Clear Lake
Click for Map
Thu -- 05:07 AM CST     0.57 feet Low Tide
Thu -- 07:05 AM CST     Sunrise
Thu -- 07:24 AM CST     Moonset
Thu -- 07:58 AM CST     0.61 feet High Tide
Thu -- 04:10 PM CST     -0.46 feet Low Tide
Thu -- 05:22 PM CST     Sunset
Thu -- 06:01 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.60.60.60.60.60.60.60.60.50.30.1-0.1-0.3-0.4-0.5-0.4-0.3-0.10.10.30.50.7

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Thu -- 04:33 AM CST     0.75 feet Low Tide
Thu -- 07:05 AM CST     Sunrise
Thu -- 07:10 AM CST     0.78 feet High Tide
Thu -- 07:24 AM CST     Moonset
Thu -- 04:20 PM CST     -0.29 feet Low Tide
Thu -- 05:22 PM CST     Sunset
Thu -- 06:01 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.80.80.70.80.80.80.80.70.70.50.30.1-0.1-0.2-0.3-0.3-0.200.30.50.70.9

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (9,2,3,4)
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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 numerious 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.