Thursday, June29, 2017 L-36.com


Marine Weather and Tides
Channelview, 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 6:21AMSunset 8:26PM Thursday June 29, 2017 10:53 AM CDT (15:53 UTC) Moonrise 11:14AMMoonset 11:55PM Illumination 30% Phase: Waxing Crescent; Moon at 6 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- 957 Am Cdt Thu Jun 29 2017
Rest of today..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..South winds around 10 knots. Bay waters smooth to slightly choppy.
Saturday night..South winds 5 to 10 knots. Bay waters smooth.
Sunday..South winds 5 to 10 knots. Bay waters smooth.
Sunday night..South winds 5 to 10 knots. Bay waters smooth.
Monday..South winds 5 to 10 knots. Bay waters smooth.
Monday night..South 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 957 Am Cdt Thu Jun 29 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Scattered to numerous showers and Thunderstorms will diminish this afternoon. As pressures fall over the central plains southwesterly flow this morning will become southerly overnight. Elevated tide levels could produce some minor coastal flooding at times of high tide. Onshore winds are expected to persist through the holiday weekend.

7 Day Forecast for Marine Location Near Channelview, TX
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location: 29.77, -95.08     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 291530
afdhgx
area forecast discussion
national weather service houston galveston tx
1030 am cdt Thu jun 29 2017

Discussion
Cloud tops in the convection over the coastal counties have warmed
over the past couple of hours. However, other isolated showers
were developing further inland at 10:00 am. An analysis of the
7:00 am surface showed a surface trough from near cleveland to
columbus with dewpoints south of the trough in the mid 70s. At
850 mb a 25 knot area of wind was feeding some higher moisture
(dewpoints of 12 to 16 celsius) into the upper texas coastal
areas. A 700 mb trough along the highway 59 corridor was
separating drier air to the west to high moisture along the coast
(where 700 mb dewpoints were from 3 to 6 celsius). Finally a 500
mb trough was off of the coast. Satellite showed the much drier
air inland contrasted to the higher moisture along and off of the
coast. High resolution models are showing the potential for at
least scattered showers and thunderstorms over inland areas with
better chances along the coast.

For the update, extended the isolated pops a bit farther inland.

Also tweaked the high temperatures for today.

40

Prev discussion issued 446 am cdt Thu jun 29 2017
discussion...

periods of showers and thunderstorms will likely continue along
the coast and over the gulf waters for much of the morning.

Isolated pockets of heavy rain are possible this morning,
especially if these storms continue to train over the same areas.

Isolated to scattered showers and storms will be possible this
afternoon further inland, but the greatest potential will likely
be generally south of the hwy 59 corridor. Right now, there is a
pretty tight pw gradient across the cwa, with values close to 2.0"
right at the coast and offshore tapering off to around 1.3" in
the college station area. With southwest flow in place, this pw
gradient will likely remain in place for today and severely limit
pop chances across the brazos valley. Scattered showers and storms
are forecast again on Friday, with the greatest chances over the
eastern portion of the area as an upper-level weakness pushes
further off to the east.

Ridging noses in beginning on Friday night and takes hold of the
forecast through the rest of the forecast period, leaving us with
very summer-like conditions through next week. Temperatures will
warm into the mid 90s during the afternoons, with heat indices
pushing into the mid 100s. Make sure any holiday plans include
plenty of water and a place to cool off.

11
marine...

storms ongoing across the coastal waters this morning along the
remains of the boundary with it slowly drifting north into setx.

Southwesterly along the boundary and moderate southerly flow to the
south of it should warrant scec conditions through at least late
morning. Expect storm coverage to diminish this morning with a lull
over the waters this afternoon with redevelopment (less so than with
ongoing coverage) this evening. The persistent southerly flow
becomes dominant as upper ridging builds over the western us and
pressures fall over the plains. Periods of scec winds possible
through Saturday. Tide levels still elevated and don't see much in
the way of improvement until Friday and that may only be slightly.

Will continue the beach hazard statement for strong rip currents and
elevate tide levels through this afternoon but will likely need
extending.

45
aviation...

not quite as messy as last night... Main issue is possibly some
MVFR ifr ceilings possible for an hour or two near sunrise across
the northern terminals but across the south is the threat of showers
and isolated thunderstorms. Gusty winds of 15 to 20 mph with storms
near the coast should gradually expand north and may reach hou
before weakening. Scattered shra tsra possible for hou southward
this morning then decreasing coverage this afternoon and vcsh will
likely the norm for hou southward. Patchy MVFR ceilings after 06z
Friday for iah hou northward. Quieter weather expected Friday
afternoon thanks to increased upper ridging influence.

45

Preliminary point temps pops
College station (cll) 93 77 93 77 96 10 10 20 10 10
houston (iah) 91 78 92 78 94 30 10 30 10 10
galveston (gls) 87 82 88 81 88 60 10 20 10 10

Hgx watches warnings advisories
Tx... None.

Gm... Small craft should exercise caution until 6 pm cdt this evening
for the following zones: coastal waters from freeport to
the matagorda ship channel out 20 nm... Coastal waters from
high island to freeport out 20 nm... Waters from freeport to
the matagorda ship channel from 20 to 60 nm... Waters from
high island to freeport from 20 to 60 nm.

Discussion... 40
aviation marine... 43


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LYBT2 0 mi54 min SW 8.9 G 16 83°F 84°F1012.9 hPa (+1.0)
MGPT2 - 8770613 - Morgans Point, TX 8 mi54 min SSW 6 G 9.9 83°F 84°F1012.9 hPa (+1.1)
NCHT2 - 8770777 - Manchester, TX 10 mi54 min WSW 5.1 G 11 84°F 82°F1011.6 hPa (+0.8)
EPTT2 - 8771013 - Eagle Point, TX 22 mi54 min SW 8.9 G 11 79°F 83°F1013.2 hPa (+1.4)
GRRT2 34 mi54 min WSW 6 G 8 81°F 83°F1013.2 hPa (+1.5)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 34 mi54 min W 2.9 G 5.1 84°F1012.9 hPa (+1.5)
GTOT2 35 mi54 min 81°F 84°F
RLOT2 - 8770971 - Rollover Pass, TX 35 mi54 min WSW 14 G 19 80°F 81°F1013.5 hPa (+1.7)
HIST2 39 mi54 min S 9.9 G 14 79°F 83°F1013.4 hPa (+1.3)
LUIT2 48 mi54 min SSW 4.1 G 6 78°F 84°F

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX11 mi2.1 hrsS 510.00 miShowers in Vicinity79°F77°F94%1013.2 hPa
Houston, Houston Hobby Airport, TX13 mi61 minSW 610.00 miLight Rain83°F75°F77%1013 hPa
John Dunn Helistop, TX17 mi99 minSSE 510.00 miPartly Cloudy82°F75°F79%1012.2 hPa
Houston, Pearland Regional Airport, TX19 mi61 minSSW 510.00 miA Few Clouds82°F75°F79%1013 hPa
Houston Intercontinental Airport, TX20 mi61 minVar 310.00 miMostly Cloudy84°F75°F77%1012.5 hPa

Wind History from EFD (wind in knots)
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Last 24hrE9E8E10E11E11E9E10E10E10E7E8E4E3E4--E3--Calm--CalmSE4S4--SW9
1 day agoE8NE7SE8SE8SE6E9NE6SE7E7E4E4E8SE4NE4E4NE4E4E7NE5NE5NE5NE4--E8
2 days agoE8NE7E8NE7E9NE10E5E5NE5NE3NE5NE5SE5SE5CalmNE3E3--CalmCalmCalmE4E5E7

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Thu -- 12:17 AM CDT     Moonset
Thu -- 12:24 AM CDT     0.86 feet High Tide
Thu -- 06:22 AM CDT     Sunrise
Thu -- 07:42 AM CDT     0.33 feet Low Tide
Thu -- 12:13 PM CDT     Moonrise
Thu -- 03:13 PM CDT     1.23 feet High Tide
Thu -- 08:24 PM CDT     Sunset
Thu -- 10:24 PM CDT     0.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.80.70.60.50.40.30.30.40.50.70.91.11.21.21.21.110.90.80.70.70.7

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Thu -- 12:17 AM CDT     Moonset
Thu -- 06:22 AM CDT     Sunrise
Thu -- 07:19 AM CDT     0.13 feet Low Tide
Thu -- 12:13 PM CDT     Moonrise
Thu -- 03:27 PM CDT     1.25 feet High Tide
Thu -- 08:24 PM CDT     Sunset
Thu -- 10:18 PM CDT     0.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.70.60.50.30.20.10.10.20.40.60.811.21.21.21.21.10.90.80.80.70.7

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 (11,2,3,4)
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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.