Saturday, November17, 2018 L-36.com


Marine Weather and Tides
Dayton, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:46AMSunset 5:24PM Saturday November 17, 2018 9:40 PM CST (03:40 UTC) Moonrise 2:20PMMoonset 1:15AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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- 934 Pm Cst Sat Nov 17 2018
Rest of tonight..Southeast winds 5 to 10 knots. Bay waters smooth.
Sunday..East winds 5 to 10 knots becoming northeast in the afternoon. Bay waters smooth. Isolated showers in the morning, then scattered showers and isolated Thunderstorms in the afternoon.
Sunday night..Northeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and isolated Thunderstorms.
Monday..Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Monday night..North winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
Tuesday..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
Tuesday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Wednesday..Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Wednesday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Thursday..Northeast winds 10 to 15 knots. Bay waters slightly choppy.
Thursday night..East winds 10 to 15 knots. Bay waters slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 934 Pm Cst Sat Nov 17 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds will prevail tonight as high pressure moves east and a weak coastal trough develops. A cold front will sag south approaching the coast in the evening then should push off the coast early Monday with winds and seas increasing from the northeast.


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 180258
afdhgx
area forecast discussion
national weather service houston galveston tx
858 pm cst Sat nov 17 2018

Discussion
Forecast looks on track so far this evening. Some very light re-
turns are developing moving in from the SW (as noted on regional
radar)... But not seeing any mention of precipitation from obs in
that area just yet. This should be changing overnight as the ov-
erall moisture profile begins to deepen. All of this is occuring
ahead of the next cold front that is still slated to move across
se tx tomorrow. 41

Prev discussion issued 704 pm cst Sat nov 17 2018
aviation...

dry air still holding on over the eastern areas but this is
changing with weak upglide producing a sct bkn deck around
3500-6000ft. Richer moisture streaming northward across the far
western gulf and into the psx area this evening as cold front
noses in through sps-lbb area at 00z. The cold front will continue
to march southward then begin to slow Sunday morning. This should
bring the front into the cll area 12-15z. Expecting light rain to
develop over the region Sunday with scattered showers mainly along
and elevated in the wake of the front. A narrow axis of deeper
moisture and weak instability will probably support a smattering
of thunderstorms from near cll down to sgr to psx. The front will
push south throughout the day with the mix ofVFR MVFR skies
abruptly becoming solid MVFR in the 1000-1800ft range with
the fropa. Will carry vcsh transitioning to ra for most sites
though cll sgr gls will be looking for vcts.

Improvement in MVFR ifr ceilings isn't likely for iah hou area
until Monday evening when low level dry air infiltrates.

45
prev discussion... Issued 220 pm cst Sat nov 17 2018
discussion...

strato cumulus is increasing across the area this afternoon as
moisture levels gradually increase. Pleasant day with current temps
generally ranging from the upper 60s to mid 70s across the area.

Change is in the way for tomorrow as a cold front is expected to
enter NW portions of the area early on Sunday and reach gls very
late in the day or in the evening. Showers are likely near and
also behind the front, especially across SW areas where the
deeper moisture will be present. Could see isolated thunderstorms
across southern areas. Temperatures are a challenge tomorrow as
they will fall behind the front. So, W NW areas will see early
morning MAX temps, where SE areas will warm some ahead of the
front, but there will also be abundant cloud cover which will
limit that warming. The front is likely to stall in our coastal
waters on Sunday night early Monday. Moisture levels are still
high in the wake of the shallow front and rain chances remain high
through Monday. A mid upper disturbance moves across Monday night
and we will see drier air push through the area behind that
disturbance. That drier air will be short lived as moisture levels
and a coastal surface trough return by early Wednesday as another
mid upper trough approaches. This sets the stage for more
widespread showers, especially across coastal and central areas.

Model guidance is in agreement that drier air will push in behind
the Wed wed night mid upper trough, so am expecting a dry
thanksgiving with temperatures warming into the 60s. Looks like
low rain chances and warmer temperatures for Fri Sat as a zonal
mid-level flow pattern is at least briefly in place over se
texas. 33

Preliminary point temps pops
College station (cll) 55 56 45 52 43 20 60 50 60 20
houston (iah) 57 64 50 57 48 10 60 40 60 40
galveston (gls) 64 70 58 62 56 10 40 40 70 50

Hgx watches warnings advisories
Tx... None.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 30 mi40 min S 1.9 G 7 64°F 67°F1019.4 hPa (+0.8)
MGPT2 - 8770613 - Morgans Point, TX 30 mi40 min E 7 G 8 60°F 60°F1020.1 hPa (+0.5)
EPTT2 - 8771013 - Eagle Point, TX 44 mi40 min ESE 2.9 G 4.1 58°F 58°F1020.2 hPa (+0.6)
HIST2 48 mi40 min ESE 7 G 8.9 62°F 55°F1020.4 hPa (+0.0)
RLOT2 - 8770971 - Rollover Pass, TX 49 mi40 min ESE 13 G 16 64°F 61°F1020.2 hPa (+0.5)

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cleveland, TX17 mi66 minN 010.00 miFair56°F52°F87%1020.3 hPa
Houston Intercontinental Airport, TX21 mi48 minE 310.00 miMostly Cloudy61°F55°F84%1020.3 hPa

Wind History from 6R3 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3SE3SE5SE5S5S6S3CalmS4CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW4SW7CalmS3S7SW4SW4CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4CalmSW3S3CalmCalmCalmCalmCalm

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Sat -- 01:15 AM CST     Moonset
Sat -- 04:57 AM CST     1.07 feet High Tide
Sat -- 06:46 AM CST     Sunrise
Sat -- 12:33 PM CST     0.68 feet Low Tide
Sat -- 02:20 PM CST     Moonrise
Sat -- 04:24 PM CST     0.76 feet High Tide
Sat -- 05:23 PM CST     Sunset
Sat -- 10:31 PM CST     0.67 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.80.9111.11.1110.90.80.70.70.70.70.70.80.80.70.70.70.70.70.7

Tide / Current Tables for Point Barrow, Trinity Bay, Texas
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Point Barrow
Click for Map
Sat -- 01:14 AM CST     Moonset
Sat -- 06:11 AM CST     1.15 feet High Tide
Sat -- 06:45 AM CST     Sunrise
Sat -- 12:16 PM CST     0.76 feet Low Tide
Sat -- 02:19 PM CST     Moonrise
Sat -- 05:22 PM CST     Sunset
Sat -- 05:23 PM CST     0.88 feet High Tide
Sat -- 10:11 PM CST     0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.70.80.911.11.11.110.90.90.80.80.80.80.80.90.90.90.80.70.60.50.5

Weather Map and Satellite Images
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GOES 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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Wind Forecast for Houston/Galveston, TX (22,6,7,8)
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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.