Friday, January19, 2018 L-36.com


Marine Weather and Tides
Anahuac, TX

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:13AMSunset 5:47PM Thursday January 18, 2018 11:50 PM CST (05:50 UTC) Moonrise 8:15AMMoonset 7:21PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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 Matagorda Bay-galveston Bay- 921 Pm Cst Thu Jan 18 2018
Rest of tonight..East winds 5 to 10 knots. Bay waters smooth. A slight chance of showers.
Friday..East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A chance of showers.
Saturday..South winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A chance of showers.
Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A slight chance of showers.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A chance of showers and isolated Thunderstorms.
Sunday night..South winds 10 to 15 knots becoming west after midnight. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Monday..North winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..North winds 5 to 10 knots. Bay waters smooth.
Tuesday..Northeast winds 5 to 10 knots becoming east in the afternoon. Bay waters smooth.
Tuesday night..East winds 5 to 10 knots becoming northeast 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 921 Pm Cst Thu Jan 18 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Winds will gradually veer to the southeast tomorrow as high pressure moves east of the region. A coastal trough will help to enhance the chance for showers and isolated Thunderstorms Friday. Onshore flow will return by Friday afternoon and seas will build. With this return moisture and warmer temperatures, the development for sea fog will be possible late Friday as warmer air travels over the colder shelf waters. The chance for fog and precipitation will persist into Sunday evening, when the next cold front is expected to push off the coast.

7 Day Forecast for Marine Location Near Anahuac, TX
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location: 29.73, -94.7     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 190313
afdhgx
area forecast discussion
national weather service houston galveston tx
913 pm cst Thu jan 18 2018

Discussion
At 800 pm, a weak area of low pressure was trying to develop over
the western gulf east of kbo. At 850 mb, high pressure was noted
over the western gulf and moisture on the backside of the high was
increasing from bro to crp to lch. At 700 mb, a well defined short
wave extended from SE ok into the big bend region and moisture
had begun to deepen along the middle and lower coast. At 300 mb, a
cyclonic shear axis extended across central texas. Warm air
advection coupled with lift from the short wave and shear axis
will generate some light showers and have expanded the area with
20 pops to include the brazos valley and a bit further east along
the upper coast. It's very dry in the sub-cloud region and much
of the rain will evaporate but some sprinkles still possible.

Surface high pressure over the southern us was moving east and
surface winds were slowly veering to the southeast. Cloud cover is
helping to insulate and temperatures have been very steady this
evening, remaining in the mid upper 30s. The clouds and weak
onshore flow will likely limit the temperature drop tonight and
bumped temps up a few degrees. Temps will likely remain
steady slowly fall through 08z and then slowly warm between
09-12z. 43

Prev discussion issued 615 pm cst Thu jan 18 2018
aviation...

a mid-level cloud deck continues to cover all TAF sites this
evening, with a slightly lower deck over the northern terminals
at 5000 feet and 8000-9000 feet decks closer to the coast. These
mid-level clouds will continue to lower through the overnight
hours, as an area of low pressure approaches from the middle texas
coast Friday morning. This system will bring showers to the area
with an isolated chance of thunderstorms along the coast.

Therefore, carrying vcsh at the coastal TAF sites beginning at
12z with these showers spreading inland across the metro taf
sites through the afternoon hours. Introduced vcts at both lbx and
gls starting 20-21z Friday to account for the possibility of
isolated thunderstorms through the early evening hours. Wind
speeds will increase to 7-11 kts through the afternoon as this
area of low pressure moves across SE tx.

Ceilings will shift fromVFR to MVFR conditions as this system
moves through the region. Went ahead and lowered visibilities
along the coast late Friday into early Saturday to account for
potential misty foggy conditions which could develop underneath
the MVFR ceilings. Ceilings should also lower beginning in the
north late Friday afternoon into early Saturday, with borderline
MVFR to ifr conditions possible, as indicated at cll.

Hathaway
prev discussion... Issued 340 pm cst Thu jan 18 2018
discussion...

persistent cloud cover across central areas has kept temps in the
upper 30s so far this afternoon. Have seen some low to mid 40s across
sw and northern areas where we have seen some cloud cover thin
at times. Expect to see cloudy skies tonight as moisture depths increase
and an upper level low approaches. Will see a much warmer night tonight,
but will still likely see freezing temps near houston and to the north.

Do not expect any areas to experience a hard freeze tonight.

A sfc trof and or broad weak sfc low will develop just off the texas
coast late tonight and on Friday. This feature coupled with an upper
level low that will move across on Friday and will trigger showers
areawide and possibly some thunderstorm activity near the coast and
offshore. The chance of rain will be greatest offshore and near the
southern coast around matagorda bay and taper downward well inland.

However, most of the area will see a chance of showers tomorrow.

The chance of rain will increase again on Sunday afternoon ahead of
a large scale upper low that will be centered across the central plains.

Southerly winds will increase on Saturday and Sunday ahead of this storm
system and this will lead to much warmer temperatures. The best chance of rain
will occur on Sunday afternoon and evening ahead of a cold front that will
move through on Sunday night. A fairly transient and zonal mid-upper level
flow pattern will be present most of next week with a couple of chances for
precipitation. The first occurring on Wednesday (near the coast and offshore)
and then again at the end of next week on Friday as a large mid upper trof
begins to amplify across the western u.S. 33
marine...

winds will gradually veer to the southeast tomorrow as high pressure
moves to the east of the region. As an area of low pressure develops
offshore on Friday, winds will continue to veer to southerly as
seas build. Chances of rain will increase heading into the weekend.

In between periods of precipitation, expect patchy sea fog to
develop late Friday as warmer air moves over the colder shelf water.

The fog threat will persist into Sunday evening when the next cold
front is forecast to push off the coast. 22

Preliminary point temps pops
College station (cll) 33 50 47 67 58 20 20 40 30 20
houston (iah) 35 54 51 69 60 10 30 40 40 20
galveston (gls) 38 55 54 65 58 10 50 50 30 20

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 43


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 15 mi50 min SSE 1.9 G 2.9 46°F1030.5 hPa
RLOT2 - 8770971 - Rollover Pass, TX 18 mi50 min NNE 1.9 G 2.9 38°F 42°F1030.3 hPa (-0.4)
HIST2 19 mi50 min S 1.9 G 1.9 38°F 44°F1030.5 hPa (-0.5)
EPTT2 - 8771013 - Eagle Point, TX 21 mi50 min Calm G 1 38°F 40°F1030.7 hPa (-0.3)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 26 mi50 min NNW 5.1 G 5.1 45°F1030 hPa (-0.3)
GTOT2 29 mi50 min NNW 1.9 G 2.9 39°F 46°F1030.6 hPa (-0.0)
NCHT2 - 8770777 - Manchester, TX 30 mi50 min SSW 2.9 G 4.1 39°F 52°F1029.7 hPa (+0.0)
GRRT2 31 mi50 min NNE 2.9 G 4.1 39°F 40°F1030.9 hPa (-0.0)
SRST2 - Sabine Pass, TX 35 mi50 min E 2.9 G 4.1 37°F 1030.3 hPa (-0.8)24°F
42035 - GALVESTON 22NM East of Galveston, TX 38 mi60 min E 7.8 G 9.7 45°F 51°F2 ft1030.3 hPa (-0.5)32°F
KXIH 39 mi35 min SSE 7 45°F 32°F
PORT2 - 8770475 - Port Arthur, TX 42 mi50 min SE 4.1 G 6 38°F 1030.1 hPa (-0.6)
SBPT2 - 8770570 - Sabine Pass North, TX 44 mi50 min ENE 5.1 G 6 38°F 48°F1031.4 hPa (-0.8)
TXPT2 46 mi50 min E 5.1 G 6 40°F 45°F1029.2 hPa (-0.8)

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX26 mi60 minS 310.00 miMostly Cloudy37°F24°F60%1031.2 hPa

Wind History from EFD (wind in knots)
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Last 24hrNE3--NE3--N4--N4--NE6NE8NE7E9E4E4E4NE3CalmCalmCalmCalmCalmCalmCalmS3
1 day agoN4N9N12
G18
N10N10N7N8N8N9N12N9N11N6N10NE7N5NW3CalmN5N6N4N4--Calm
2 days agoE9E4N3N12NW16
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Tide / Current Tables for Round Point, Trinity Bay, Galveston Bay, Texas (sub)
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Round Point
Click for Map
Fri -- 04:06 AM CST     0.50 feet Low Tide
Fri -- 05:26 AM CST     0.63 feet High Tide
Fri -- 07:14 AM CST     Sunrise
Fri -- 08:54 AM CST     Moonrise
Fri -- 01:28 PM CST     0.57 feet High Tide
Fri -- 04:21 PM CST     -0.38 feet Low Tide
Fri -- 05:45 PM CST     Sunset
Fri -- 08:14 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.60.50.50.60.60.60.50.50.50.50.50.60.50.1-0.3-0.4-0.3-0.100.20.40.5

Tide / Current Tables for Point Barrow, Trinity Bay, Texas
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Point Barrow
Click for Map
Fri -- 12:39 AM CST     0.75 feet High Tide
Fri -- 03:57 AM CST     0.59 feet Low Tide
Fri -- 07:14 AM CST     Sunrise
Fri -- 08:54 AM CST     Moonrise
Fri -- 08:58 AM CST     0.66 feet High Tide
Fri -- 03:57 PM CST     -0.38 feet Low Tide
Fri -- 05:45 PM CST     Sunset
Fri -- 08:15 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.70.60.60.60.60.60.60.70.60.50.30.1-0.1-0.3-0.4-0.3-0.2-0.10.10.30.40.6

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Houston/Galveston, TX (0,6,7,8)
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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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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.