Sunday, December15, 2019
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Marine Weather and Tides
El Lago, 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 7:06AMSunset 5:24PM Sunday December 15, 2019 1:48 AM CST (07:48 UTC) Moonrise 9:04PMMoonset 10:14AM Illumination 87% Phase: Waning Gibbous; Moon at 18 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- 1116 Pm Cst Sat Dec 14 2019
.dense fog advisory in effect until 4 am cst Sunday...
Rest of tonight..South winds 5 to 10 knots. Bay waters smooth. Patchy dense fog.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy.
Sunday night..South winds around 10 knots. Bay waters smooth to slightly choppy. A chance of showers in the late evening and early morning. Showers late.
Monday..South winds around 10 knots becoming northwest in the afternoon. Bay waters smooth to slightly choppy becoming slightly choppy in the afternoon. A chance of Thunderstorms until late afternoon. Showers. A slight chance of Thunderstorms late in the afternoon.
Monday night..North winds 15 to 20 knots. Bay waters choppy. A slight chance of showers in the evening.
Tuesday..North winds 15 to 20 knots. Bay waters choppy.
Tuesday night..North winds 15 to 20 knots decreasing to 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight.
Wednesday..North winds 10 to 15 knots decreasing to 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.
Thursday..East winds 5 to 10 knots. Bay waters smooth.
Thursday night..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1116 Pm Cst Sat Dec 14 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Winds will increase tonight into Sunday as pressures fall over west texas. Patchy fog will be possible tonight and again Sunday night as warmer air moves over cooler shelf waters. The next cold front will cross the coastal waters late Monday. Strong north winds are expected in the wake of the front. A small craft advisory will likely be required Monday night into early Wednesday.


7 Day Forecast for Marine Location Near El Lago, TX
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location: 29.56, -95.05     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 150535 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 1135 PM CST Sat Dec 14 2019

AVIATION. Ceilings have developed and deteriorated much faster than expected with a blanket of IFR ceilings over all but the southernmost TAF sites. A persistent onshore flow will continue to bring low level moisture into the region beneath a strong cap. Winds will not decouple tonight so expecting low stratus for much of the night into early Sunday. Winds will increase further and there should be enough heating to lift ceilings by afternoon with a mix of MVFR/VFR ceilings. Sea fog may develop toward evening at KGLS. Not sure if ceilings will redevelop toward evening and kept things VFR for now. Introduced a VCSH for KIAH for the last six hours of the TAF period. 43

PREV DISCUSSION. /ISSUED 1000 PM CST Sat Dec 14 2019/

UPDATE .

As winds shifted southerly this afternoon/evening, warm and moist air mass from the Gulf filtered into the region. Low level moisture has increased dewpoint values sufficiently enough to create favorable conditions for fog development tonight through Sunday morning. Earlier dewpoint/temperature/wind analysis showed southern regions affected by fog starting near midnight, spreading into the central and northern regions a few hours thereafter. Well, it began even earlier than expected. Areas of fog have already been spotted over portions of Brazoria, Galveston, Harris, and Fort Bend counties and it continues to spread out. However, winds look to pick up as the pressure gradient tightens. This may not allow for dense fog to stick as much over these areas. The fog is expected to lift during the morning hours Sunday, but could re-appear along areas near the bays and coasts due to possible sea fog formation Sunday evening. Onshore flow will prevail Sunday, continuing the warming trend across SE Texas. High temperatures Sunday afternoon will reach the low 80s across most of the region, slightly cooler along the coasts and Barrier Islands. No rainfall is expected, but will remain party to variably cloudy.

Main Changes: Updated the temperatures to better represent the current observations. Included patchy fog for the Brazoria, Galveston, Harris, and Fort Bend counties a few hours earlier from what was previously forecasted. The rest of the forecast remains unchanged. 24

Marine .

Winds will increase tonight as the pressure gradient tightens, and in turn elevate seas; SCEC flags have been issued for the offshore waters through 5 AM CST.

Dewpoints will be increasing to near 70s Sunday and with water temperatures around 64, there is potential for sea fog to develop across the bays and nearshore Gulf waters during the evening through Monday morning. Fog development will cease with the passage of the next cold front Monday, as drier and colder air mass moves into the local waters. 43/24

PRELIMINARY POINT TEMPS/POPS. College Station (CLL) 55 82 60 65 37 / 10 10 20 50 0 Houston (IAH) 58 81 68 72 40 / 10 10 30 80 10 Galveston (GLS) 64 77 67 71 45 / 10 10 30 70 20

HGX WATCHES/WARNINGS/ADVISORIES. TX . NONE. GM . SMALL CRAFT SHOULD EXERCISE CAUTION until 5 AM CST Sunday 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.

Dense Fog Advisory until 4 AM CST Sunday for the following zones: Galveston Bay.



Discussion . 43 Aviation/Marine . 43


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 9 mi55 min SE 1 G 1.9 63°F 63°F1009.5 hPa
EPTT2 - 8771013 - Eagle Point, TX 9 mi55 min S 11 G 12 67°F 61°F1008.9 hPa
NCHT2 - 8770777 - Manchester, TX 16 mi55 min S 8 G 13 69°F 66°F1008.8 hPa
GRRT2 20 mi55 min S 8.9 G 11 66°F 62°F1009.2 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 22 mi55 min S 12 G 12 70°F 62°F1008.6 hPa
GTOT2 22 mi55 min S 5.1 G 12 69°F 62°F1009.5 hPa
RLOT2 - 8770971 - Rollover Pass, TX 29 mi49 min S 7 G 11 65°F 59°F1009.9 hPa (+0.0)
LUIT2 34 mi49 min SSE 6 G 9.9 67°F 63°F1010.7 hPa (+0.0)
HIST2 35 mi55 min SSE 5.1 G 7 65°F 61°F1009.7 hPa
KXIH 38 mi14 min S 11 70°F 68°F
42035 - GALVESTON 22NM East of Galveston, TX 41 mi29 min 9.7 G 9.7 1010.8 hPa
FCGT2 - 8772447 - USCG Freeport, TX 45 mi49 min S 8.9 G 9.9 67°F 62°F
FPST2 45 mi49 min SSE 11 G 12 67°F 64°F1009 hPa (+0.0)

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX8 mi59 minSSE 106.00 miFog/Mist68°F68°F100%1009.1 hPa
Houston, Pearland Regional Airport, TX11 mi56 minS 64.00 miFog/Mist69°F66°F90%1009.8 hPa
Houston, Houston Hobby Airport, TX14 mi56 minS 127.00 miOvercast70°F66°F90%1009.6 hPa
John Dunn Helistop, TX21 mi54 minVar 6 G 133.00 miFog/Mist70°F69°F100%1009.1 hPa
Galveston, Scholes Field, TX22 mi57 minSSE 96.00 miFog/Mist68°F66°F96%1009.9 hPa
Houston Southwest Airport, TX23 mi54 minSSE 40.50 miFog65°F65°F100%1009.5 hPa

Link to 5 minute data for KEFD

Wind History from EFD (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalm--E3SE4----SE7E8E8E7E4CalmE4E5SE3CalmS8S10
1 day agoCalmCalmSE3CalmCalm----S4SW4SW7SW8--SW11SW8SW11W11--Calm--CalmCalmN4NW4--
2 days agoNE4NE5NE5NE5NE5NE3NE7E9E5E4E5E4E4--E4E3SE3CalmCalmCalmSE3CalmSE3Calm

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Sun -- 01:58 AM CST     0.93 feet High Tide
Sun -- 07:07 AM CST     Sunrise
Sun -- 07:17 AM CST     0.80 feet Low Tide
Sun -- 07:44 AM CST     0.81 feet High Tide
Sun -- 10:14 AM CST     Moonset
Sun -- 05:23 PM CST     Sunset
Sun -- 06:33 PM CST     -0.35 feet Low Tide
Sun -- 09:03 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.90.90.90.90.80.80.80.80.80.80.70.60.50.30.1-0.1-0.2-0.3-0.3-0.2-0.10.10.4

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sun -- 01:48 AM CST     -0.00 knots Slack
Sun -- 07:05 AM CST     Sunrise
Sun -- 10:12 AM CST     Moonset
Sun -- 10:55 AM CST     -2.24 knots Max Ebb
Sun -- 03:50 PM CST     0.00 knots Slack
Sun -- 05:22 PM CST     Sunset
Sun -- 07:24 PM CST     2.27 knots Max Flood
Sun -- 09:02 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.1-0.3-0.4-0.5-0.7-1.1-1.5-1.9-2.2-2.2-2.1-1.9-1.4-0.70.11.11.92.22.21.91.61.2

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 (2,6,7,8)
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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 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.