Monday, November30, 2020
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Marine Weather and Tides
Dayton, TX

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:57AMSunset 5:21PM Monday November 30, 2020 11:11 AM CST (17:11 UTC) Moonrise 5:43PMMoonset 7:08AM Illumination 100% Phase: Full Moon; Moon at 15 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- 922 Am Cst Mon Nov 30 2020
.low water advisory in effect until 6 pm cst this evening...
.small craft advisory in effect until noon cst today...
.small craft exercise caution in the afternoon...
Rest of today..North winds 15 to 25 knots becoming northwest 15 to 20 knots in the afternoon. Bay waters choppy.
Tonight..North winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Tuesday..East winds 5 to 10 knots becoming southeast in the afternoon. Bay waters smooth.
Tuesday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers in the late evening and early morning. Showers likely late.
Wednesday..Southeast winds 10 to 15 knots becoming north in the afternoon. Bay waters slightly choppy. Showers likely in the morning, then a chance of showers in the afternoon.
Wednesday night..North winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers in the evening, then a slight chance of showers after midnight.
Thursday and Thursday night..North winds 10 to 15 knots. Bay waters slightly choppy.
Friday..North winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..North 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 922 Am Cst Mon Nov 30 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Strong northwest to north winds and elevated seas can be expected today as high pressure builds into the state. This offshore flow will lead to low tide levels which could effect navigation. Winds will decrease and seas will come down tonight as high pressure moves over the area. Onshore winds will return on Tuesday and persist into Wednesday as the high moves off to the east. The next cold front should move through the area on Wednesday. A moderate offshore flow will develop behind this front and will persist through the end of the week.


7 Day Forecast for Marine Location Near Dayton, TX
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location: 30.11, -95     debug


Area Discussion for - Houston/Galveston, TX
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FXUS64 KHGX 301057 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 457 AM CST Mon Nov 30 2020

AVIATION [12Z TAF Issuance].

VFR conditions will prevail throughout the day. Winds will remain gusty out of the northwest throughout the day and become calm this evening.

KBL

PREV DISCUSSION /Issued 411 AM CST Mon Nov 30 2020/.

SHORT TERM [through Tuesday].

A drier and much cooler airmass moves in today as a surface high builds in over western/central TX. With strong cold air advection in place, temperatures will struggle to get above 60s despite ample sunshine. In addition, pressure gradient remains tight, keeping winds fairly breezy, especially along the coastal counties and over the Gulf waters. Will continue with the Wind Advisory for the barrier islands until noon. Wind will gradually decrease this afternoon/early evening as the surface high moves overhead and pressure gradient relaxes.

Clear skies will allow for good radiational cooling, that in combination with northerly winds, temperatures will bottom out near to below freezing tonight. Most of the region should expect to see temperatures at or below 32 degrees tonight into early Tuesday with the coldest readings in areas along and north of I-10. Have issued a Freeze Warning for all but the immediate coast counties from midnight tonight until 8AM CST Tuesday.

Surface high migrates to our east on Tuesday, bringing back southerly flow into the region. A gradual increase in moisture is expected ahead of the next cold front moving through the region by Wednesday. Afternoon highs will climb into the upper 50s to mid 60s.

05/KBL

LONG TERM [Tuesday night through Monday].

With surface high pressure off to our east and onshore winds in place, a little bit of a warmup can be expected Tuesday night and Wednesday. Rising moisture levels will help to bring rain back into the forecast beginning Tuesday night but especially on Wednesday and Wednesday evening. The next cold front will work its way through the area on Wednesday, and this will help to reinforce this week's cool down. Freezing overnight lows will be possible once again for our northern counties on Friday morning and Saturday morning, but it will not be as cold as Tuesday morning's low. A slow and gradual warming trend can be expected over the weekend with lows eventually in the 30s/40s and highs in the 50s/60s. 42

MARINE.

Strong offshore winds high seas can be expected today as high pressure builds into the state. Offshore flow will lead to low tide levels which could effect navigation (Low Water Advisory in effect for Galveston Bay). Winds will decrease late this afternoon and on into tonight as high pressure becomes positioned over the area. Onshore winds will return on Tuesday and persist into Wednesday as the high moves off to the east. The next cold front should move through the area on Wednesday. A moderate offshore flow will develop behind this front and will persist through the end of the week. 42

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 52 28 60 45 60 / 0 0 0 20 40 Houston (IAH) 52 31 61 52 63 / 0 0 0 20 60 Galveston (GLS) 54 44 65 60 68 / 0 0 0 30 60

HGX WATCHES/WARNINGS/ADVISORIES.

TX . Freeze Warning from midnight tonight to 8 AM CST Tuesday for the following zones: Austin . Brazos . Burleson . Colorado . Fort Bend . Grimes . Houston . Inland Brazoria . Inland Harris . Inland Jackson . Inland Matagorda . Madison . Montgomery . Northern Liberty . Polk . San Jacinto . Southern Liberty . Trinity . Walker . Waller . Washington . Wharton.

Wind Advisory until noon CST today for the following zones: Brazoria Islands . Galveston Island and Bolivar Peninsula . Matagorda Islands.

GM . Small Craft Advisory until noon CST today for the following zones: Galveston Bay . Matagorda Bay.

SMALL CRAFT SHOULD EXERCISE CAUTION from noon CST today through this afternoon for the following zones: Galveston Bay . Matagorda Bay.

Low Water Advisory until 6 PM CST this evening for the following zones: Galveston Bay.

Small Craft Advisory until 6 PM CST this evening 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 . 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
MGPT2 - 8770613 - Morgans Point, TX 30 mi53 min 46°F 64°F1029.4 hPa
NCHT2 - 8770777 - Manchester, TX 30 mi53 min 46°F 55°F1029.6 hPa
EPTT2 - 8771013 - Eagle Point, TX 44 mi53 min 47°F 61°F1028.6 hPa
HIST2 48 mi53 min 45°F 59°F1027.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 49 mi53 min 46°F 46°F1028.5 hPa

Wind History for Morgans Point, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cleveland, TX17 mi36 minN 12 G 177.00 miFair47°F21°F36%1029.8 hPa
Houston Intercontinental Airport, TX21 mi18 minN 1010.00 miA Few Clouds50°F24°F36%1029.7 hPa

Link to 5 minute data for K6R3

Wind History from 6R3 (wind in knots)
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1 day agoN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3CalmN3CalmN4N5N9N8N5N7N11
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2 days agoCalmCalmCalmN4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3N3CalmCalmNE3E4NE5

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Mon -- 03:32 AM CST     Full Moon
Mon -- 06:57 AM CST     Sunrise
Mon -- 07:07 AM CST     Moonset
Mon -- 02:55 PM CST     -0.06 feet Low Tide
Mon -- 05:20 PM CST     Sunset
Mon -- 05:43 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.41.31.21.11.11.110.90.80.60.40.20.1-0-0.1-00.10.40.60.91.11.31.4

Tide / Current Tables for Point Barrow, Trinity Bay, Texas
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Point Barrow
Click for Map
Mon -- 02:45 AM CST     0.96 feet Low Tide
Mon -- 03:32 AM CST     Full Moon
Mon -- 06:56 AM CST     Sunrise
Mon -- 07:06 AM CST     Moonset
Mon -- 07:09 AM CST     1.00 feet High Tide
Mon -- 02:19 PM CST     -0.11 feet Low Tide
Mon -- 05:19 PM CST     Sunset
Mon -- 05:42 PM CST     Moonrise
Mon -- 11:46 PM CST     1.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.1111111110.90.70.50.20-0.1-0.1-00.10.30.50.70.91.11.2

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
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.