Saturday, December14, 2019
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Marine Weather and Tides
The Woodlands, 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 7:08AMSunset 5:24PM Saturday December 14, 2019 6:28 AM CST (12:28 UTC) Moonrise 8:00PMMoonset 9:25AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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 Expires:201912142330;;764284 Fzus54 Khgx 141016 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 416 Am Cst Sat Dec 14 2019 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz330-335-142330- Matagorda Bay-galveston Bay- 416 Am Cst Sat Dec 14 2019
Today..Northeast winds around 5 knots becoming southeast in the afternoon. Bay waters smooth.
Tonight..South winds 10 to 15 knots. Bay waters 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. A chance of showers in the late evening and overnight. Isolated Thunderstorms late.
Monday..Southwest winds 10 to 15 knots becoming northwest 15 to 20 knots in the afternoon. Bay waters slightly choppy becoming choppy in the afternoon. Showers and isolated Thunderstorms.
Monday night..North winds 15 to 25 knots becoming 20 to 25 knots after midnight. Bay waters choppy becoming rough after midnight. A slight chance of showers early in the evening.
Tuesday..North winds 20 to 25 knots decreasing to 15 to 20 knots in the afternoon. Bay waters rough becoming choppy in the afternoon.
Tuesday night..North winds 15 to 20 knots. Bay waters choppy.
Wednesday..North winds 10 to 15 knots becoming northeast 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Wednesday night..Northeast winds 5 to 10 knots. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 416 Am Cst Sat Dec 14 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Return flow late today with southerly winds strengthening through tomorrow per lowering western texas pressure. The next cold front will pass across the waters Monday night. Strong north winds in the front's wake, with responding heightened seas, will reach advisory levels late Monday night and persist through Wednesday morning. North winds weaken and turn around to onshore Thursday.


7 Day Forecast for Marine Location Near The Woodlands, TX
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location: 30.11, -95.52     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 141206 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 606 AM CST Sat Dec 14 2019

AVIATION. VFR through the day into evening hours . calm to light breezes waking up from the east and veering light onshore this afternoon. Increasing lower level moisture within a cooling near surface layer will pick up the probabilities of lowering cats to MVFR as ceilings fill in and fall to around 2k ft after midnight. MVFR with more isolated IFR decks with MVFR visibility-reducing haze or light fog will impact many regional terminals before and through Sunday sunrise. 31

PREV DISCUSSION. /ISSUED 349 AM CST Sat Dec 14 2019/

SHORT TERM [Through Sunday] . Mainly clear overnight Saturday morning skies has allowed a few sites' temperatures to fall to within a degree or two of their respective dew points. This has created very isolated radiative fog to form over the Angleton and Cleveland areas. Light northeast breezes behind yesterday's washed out boundary will veer around the eastern side of the dial and become onshore through the day. This warmer flow will have regional temperatures warming back up into the areawide middle to upper 70s by early afternoon. Increasing boundary layer moisture will assist in keeping Sunday morning's temperatures around 10 degrees warmer than tonight's minimums (in the mid to upper 40s). The onshore pressure gradient tightens evermore on Sunday to produce a stout southerly wind. Despite windier conditions and thickening cloudiness Sunday, areawide temperatures will warm into the areawide lower 80s. These unseasonably warm conditions will flirt with maximum temperature records (see Climate section below). 31

LONG TERM [Sunday Night Through Saturday] . Sunday night will be our last "warm" night as some spots struggle to fall below the mid to upper 60s (these lows are actually close to the normal high temperatures for mid December). Expect to see increasing shower coverage (maybe an isolated thunderstorm or two) starting after midnight as instability begins to increase ahead of the next cold front. Best shower/thunderstorm chances come on Monday as the front sweeps through the northern counties in the morning, central counties in the late morning or early afternoon and off the coast in the afternoon. Look for temperatures to fall behind the front (and rains to come to an end) with readings likely to drop into the 50s (especially up north) in the afternoon. Drier and much cooler weather will take over beginning Tuesday night through Wednesday night with lows as cold as the upper 20s/lower 30s inland and highs in the 50s. A slight warm up can be expected in the Thursday/Friday time period (lows in the 40s/50s and highs in the 60s) while the next storm system moves across the state and brings parts of the area some rain. If the timing is right, next weekend should end up dry with cool nights and mild days. 42

MARINE . Seas have leveled off at around 2 feet under weak winds to begin the weekend. After a day of light and variable winds, southerly winds will return and strengthen to caution levels tomorrow in response to lowering western Texas pressure. Seas lift back to 3-4 feet nearshore . 4-6 foot offshore heights by Sunday afternoon. A strong cold front is forecast to travel across the waters late Monday night. North winds and seas will significantly strengthen and lift respectively to Advisory levels Tuesday. Strong cold air advection coming across the waters behind the front will maintain a tight enough offshore pressure gradient to keep winds and seas at Advisory levels through Wednesday morning . falling off through the afternoon into evening hours. Surface high pressure re- positioning itself over the southeastern U.S. will veer light winds around to onshore by Thursday. 31

CLIMATE . Near record high temperature are possible on Sunday (12/15). Here are some record highs and their date of occurrence:

CLL . 84/1924 IAH . 82/1995 HOU . 81/1995 GLS . 77/2012

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PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 77 54 82 60 68 / 0 0 10 20 50 Houston (IAH) 75 58 81 68 73 / 0 10 10 40 80 Galveston (GLS) 74 64 77 67 72 / 0 10 10 20 80

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

Short/Aviation/Marine . 31 Long/Climate . 42


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 30 mi64 min Calm G 1 52°F 65°F1010.4 hPa
MGPT2 - 8770613 - Morgans Point, TX 41 mi64 min NNE 1.9 G 4.1 56°F 62°F1011 hPa
EPTT2 - 8771013 - Eagle Point, TX 54 mi64 min W 1 G 1.9 53°F 59°F1010.4 hPa
RLOT2 - 8770971 - Rollover Pass, TX 67 mi58 min N 2.9 G 4.1 55°F 57°F1011.2 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Hooks Memorial Airport, TX3 mi35 minN 36.00 miFog/Mist43°F39°F89%1011.5 hPa
Houston Intercontinental Airport, TX13 mi35 minN 310.00 miFair46°F43°F89%1011.4 hPa
Conroe, Montgomery County Airport, TX18 mi35 minNNW 310.00 miFair37°F36°F96%1012 hPa

Link to 5 minute data for KDWH

Wind History from DWH (wind in knots)
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1 day agoE5NE5E7E4CalmE3E3CalmE3E5E4NE3CalmCalmCalmCalmSE5SE3CalmSE3CalmCalmCalmCalm
2 days agoNE8N6N8N7NE4NE6E8NE6NE6NE5NE6NE4N5NE4NE4CalmNE4E3CalmCalmCalmE4E5E5

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Sat -- 01:03 AM CST     1.51 feet High Tide
Sat -- 07:07 AM CST     Sunrise
Sat -- 09:22 AM CST     Moonset
Sat -- 04:17 PM CST     -0.24 feet Low Tide
Sat -- 05:22 PM CST     Sunset
Sat -- 07:58 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.51.51.41.41.31.31.21.21.10.90.70.50.20-0.2-0.2-0.2-0.10.10.40.811.3

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
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Clear Lake
Click for Map
Sat -- 01:22 AM CST     0.74 feet High Tide
Sat -- 07:06 AM CST     Sunrise
Sat -- 07:34 AM CST     0.62 feet Low Tide
Sat -- 08:16 AM CST     0.62 feet High Tide
Sat -- 09:21 AM CST     Moonset
Sat -- 05:22 PM CST     Sunset
Sat -- 05:32 PM CST     -0.53 feet Low Tide
Sat -- 07:59 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.70.70.70.70.60.60.60.60.60.50.40.2-0.1-0.3-0.4-0.5-0.5-0.4-0.3-0.10.20.4

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 (7,2,3,4)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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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.