Monday, May29, 2017 L-36.com


Marine Weather and Tides
Channelview, TX

Version 3.4
What's New / NOTES
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 6:19AMSunset 8:16PM Monday May 29, 2017 6:21 AM CDT (11:21 UTC) Moonrise 9:24AMMoonset 11:15PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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- 533 Am Cdt Mon May 29 2017
.small craft advisory in effect until 10 am cdt this morning...
Rest of today..East to southeast 20 to 25 knots and gusty in the early morning, then becoming east around 5 knots in the afternoon. Bay waters rough in the morning, then becoming smooth in the afternoon. A chance of showers and Thunderstorms early in the morning, then showers and Thunderstorms likely late in the morning. A chance of showers and Thunderstorms in the afternoon.
Tonight..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday..Southeast winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Wednesday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Showers and Thunderstorms likely.
Thursday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Friday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 533 Am Cdt Mon May 29 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Showers and Thunderstorms this morning with variable strong and gusty winds of 30 to 40 knots will be possible. After storms weaken late this morning expect east and southeasterly winds to develop. Moisture should increase as a pool of deeper moisture over the gulf spreads back into the region increasing rain chances tonight through Wednesday on southeasterly flow. Persistent moderate southeast winds are expected from Tuesday through Saturday along with periods of showers and Thunderstorms. An area of disturbed weather may develop near the lower texas coast Saturday and track into the region early next week.

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 291037
afdhgx
area forecast discussion
national weather service houston galveston tx
537 am cdt Mon may 29 2017

Marine
Meso-high driving gradient winds across the coastal waters and
into the coast and bays. Winds of 20-30kts gusts to 40 for the
next few hours. Winds should weaken as storms well offshore
weaken. Will have to watch comma head rotating in from the west
and could clip or aggravate the already strong winds as it pushes
east. Have hoisted SCA for all waters through 10 am and special
marine warnings through 7 am.

45

Prev discussion issued 419 am cdt Mon may 29 2017
discussion...

light to moderate rainfall lingers across southeast texas this
morning behind an outflow boundary that has since pushed off the
upper texas coast. Regional radar mosiac shows most of the
thunderstorm activity this morning relegated to the western gulf
of mexico, with an expansive thunderstorm complex stretching from
corpus christi to harlingen slowly pushing to the east.

Extrapolation of current storm movement places this complex into
the western waters sometime between 5 and 7 am cdt. At least
through the morning hours, this complex will be the primary driver
for rain chances for the region as its parent shortwave trough
lifts towards the region, pushing the complex and associated
surface low mesoscale convective vortex into it. What remains to
be seen at this time is how far north rain chances will extend
inland this morning as the outflow approaching the south texas
thunderstorm complex may result in enough low level convergence
off the coast to block inflow and cut off rain chances farther
inland. With mid and upper level steering flow from the southwest
concerned that there may be some expansion or movement to the
northeast into the matagorda bay area and have maintained 60-70
pops for this morning as a result. However, if this complex
appears to remain offshore an update may be needed later this
morning to lower rain chances.

With most activity along the coast and across the waters early this
morning, expect to see at least a brief break in rain chances but
daytime heating will result in scattered shower and thunderstorm
development across the region mid to late morning and into the
afternoon. Expect greatest coverage to occur along several of the
remnant boundaries draped across the region. Surface analysis
reveals that yesterday's cold front remains stalled well north of
the interstate 10 corridor, stretching from san antonio to hearne
to athens. The kgrk radar this morning is also showing several
moisture "fine lines" across the brazos valley, indicative of
remnant outflow boundaries from last night's storms. Other
unidentified boundaries may also exist farther south of these
locations. Limited shear (less than 20 knots) present through
early afternoon and much less steep lapse rates than yesterday
(5.5-6.5 c km) will result in a much lower severe weather threat
today, but with some dry air present between the surface and 600
mb on forecast soundings cannot rule out gusty winds in stronger
convection. 1.7-2 inch precipitable water values today (higher
than the 75th percentile for this time of year) will also mean the
locally heavy rain threat will continue, especially along any of
the aforementioned boundaries. Subsidence from the passing
shortwave trough should result in another break in the rain by
this evening and into tonight, with diurnal heating and
precipitable water values in the 1.6-1.8 inch range on Tuesday
resulting in scattered to numerous showers and thunderstorms
capable of locally heavy rain. Expect highs to range in the upper
70s to low 80s today, warming into the low to mid 80s on Tuesday.

Periods of showers and thunderstorms will continue across the
region Wednesday into the weekend as a series of disturbances now
near the gulf of alaska on early morning water vapor imagery drop
to near baja california and translate east across texas. Elevated
precipitable water values in the 1.6-1.9 inch range will mean the
threat for locally heavy rainfall will persist each day, with rain
chances likely being enhanced during the daytime hours from
heating. Expect high temperatures to remain in the low to mid 80s
through the end of the work week. Dry weather may not return to
the forecast until early to mid next week as shortwave ridging
attempts to build into the region.

Huffman
marine...

stormy weather this morning over the coastal waters. Outflow
pushed southward through the region bringing gusty conditions
(20-45kt) and has collided with boundary offshore and being
intercepted by incoming MCS from crp area. Hoisted a SCA through
10 for these strong winds and elevated seas but by 8-10 am expect
that conditions should be improving except for all but the far
coastal waters where storms will probably be the most active-or
just south of there... Will need to keep an eye out for meso high
developing and ramping up winds.

Otherwise easterly winds becoming southeasterly this afternoon
and overnight gradually increasing to 10 to 15 knots and then
persisting through Saturday. As moist to very moist conditions
flowing into and through the region expecting showers and
thunderstorms to remain a threat.

Ecmwf still painting the scenario of fairly intense low pressure
system developing in the western gulf (Saturday) and slowly moving
to near galveston (Monday morning) which would have big impacts
on the current forecast. Have trended the forecast toward the gfs
but will be watching closely to see of the GFS or the ECMWF blink.

45

Preliminary point temps pops
College station (cll) 80 69 84 69 85 40 30 40 20 50
houston (iah) 81 70 84 71 85 50 30 60 30 50
galveston (gls) 80 74 81 76 83 60 50 60 30 50

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory until 10 am cdt this morning 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... Galveston bay... Matagorda
bay... 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... 14
aviation marine... 45


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LYBT2 0 mi51 min W 2.9 G 4.1 71°F 82°F1012.2 hPa
MGPT2 - 8770613 - Morgans Point, TX 8 mi51 min ESE 6 G 9.9 74°F 81°F1012.6 hPa
NCHT2 - 8770777 - Manchester, TX 10 mi51 min WSW 1 G 2.9 71°F 80°F1013.3 hPa
EPTT2 - 8771013 - Eagle Point, TX 22 mi51 min SE 27 G 32 77°F 81°F1011.6 hPa
GRRT2 34 mi51 min E 20 G 27 77°F 82°F1011.1 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 34 mi51 min ESE 32 G 39 81°F1010.8 hPa
GTOT2 35 mi51 min 77°F 82°F
RLOT2 - 8770971 - Rollover Pass, TX 35 mi51 min ESE 31 G 38 77°F 74°F1010.1 hPa
HIST2 39 mi51 min ESE 17 G 25 75°F 80°F1010.8 hPa
LUIT2 48 mi51 min E 29 G 37 78°F

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Houston Hobby Airport, TX13 mi28 minN 010.00 miOvercast71°F69°F94%1013.6 hPa
John Dunn Helistop, TX17 mi46 minSE 310.00 miA Few Clouds70°F66°F88%1012.5 hPa
Houston, Pearland Regional Airport, TX19 mi28 minNNW 410.00 miA Few Clouds73°F68°F84%1013.7 hPa
Houston Intercontinental Airport, TX20 mi28 minN 010.00 miOvercast69°F66°F93%1013.4 hPa

Wind History from EFD (wind in knots)
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Last 24hrS10S10------S7S6S5S5CalmE3E10SE12SE11SE11SE10SE11SE11SE13S8E3E3SE3E7
1 day agoSE9S10S6S10S10S8S8S9S11S14S12S14S14
G20
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S14SE12SE13S13S11S8SE8S10S10
2 days agoS7S8S8S6S5SE3S3S7S5S10S13S12S13S11S12S14S12S9SE8SE11SE9S10SE8SE10

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Mon -- 06:20 AM CDT     Sunrise
Mon -- 06:28 AM CDT     -0.17 feet Low Tide
Mon -- 10:24 AM CDT     Moonrise
Mon -- 03:13 PM CDT     1.44 feet High Tide
Mon -- 08:14 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.80.60.30.1-0.1-0.2-0.2-00.20.50.81.11.31.41.41.41.41.31.21.11.111

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Mon -- 05:33 AM CDT     -0.18 feet Low Tide
Mon -- 06:20 AM CDT     Sunrise
Mon -- 10:24 AM CDT     Moonrise
Mon -- 03:26 PM CDT     1.76 feet High Tide
Mon -- 08:14 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.70.40.2-0-0.2-0.2-0.10.10.40.81.11.31.61.71.81.71.71.61.61.51.41.41.2

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 (7,2,3,4)
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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.