Tuesday, April24, 2018 L-36.com


Marine Weather and Tides
Channelview, TX

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:42AMSunset 7:54PM Tuesday April 24, 2018 7:19 AM CDT (12:19 UTC) Moonrise 1:48PMMoonset 2:27AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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- 353 Am Cdt Tue Apr 24 2018
Today..North winds 5 to 10 knots. Bay waters smooth.
Tonight..Southwest winds 5 to 10 knots becoming northwest after midnight. Bay waters smooth.
Wednesday..Northeast winds around 5 knots becoming southeast in the afternoon. Bay waters smooth.
Wednesday night..South winds around 10 knots becoming west after midnight. Bay waters smooth to slightly choppy becoming slightly choppy after midnight. A chance of showers and Thunderstorms.
Thursday..North winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon. A slight chance of showers and Thunderstorms.
Thursday night..North winds 5 to 10 knots. Bay waters smooth.
Friday and Friday night..North winds 5 to 10 knots. Bay waters smooth.
Saturday..Northeast winds around 10 knots becoming east in the afternoon. Bay waters smooth to slightly choppy.
Saturday night..Southeast 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 353 Am Cdt Tue Apr 24 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Light winds and low seas should persist through Wednesday. A weak cold front will move off the coast Wednesday night. The offshore flow behind the front will persist through the end of the week as another cold front moves through the area on Friday. Onshore winds that are expected to return late Saturday or Saturday night should persist for the remainder of the weekend and then strengthen into the start of 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 241122
afdhgx
area forecast discussion
national weather service houston galveston tx
622 am cdt Tue apr 24 2018

Aviation
Seeing some MVFR fog early this morning on the lbx obs. It is
possible some more patchy fog could develop in around more of
our TAF sites late tonight through early Wednesday morning, so
have mentioned it in some of our rural locations. Otherwise,
vfr with some high clouds eventually streaming into the area
from the west. Generally expecting to see north winds today
under 7 knots with a possible shift to the southeast and
south later this afternoon near the coast. 42

Prev discussion issued 350 am cdt Tue apr 24 2018
discussion...

relatively quiet week ahead, though that will be more a function
of a progressive, but lower amplitude, pattern rather than much in
the way of stagnation. A mid-week cold front will bring a chance
for rain and some thunderstorms Wednesday afternoon into Thursday
morning. After that, a series of weak upper troughs will multiple
chances of rain, but those chances look to be relatively low at
this time. Otherwise, look for temperatures to be pleasant in the
upper 70s and lower 80s.

Near term [through today]...

if yesterday was your thing - sunny skies, generally seasonable
conditions - not much is going to be different today. Surface high
pressure will drift just east of us, and light onshore flow may
set up at the coast, making today a bit more humid there. But,
winds should be light and most will see dewpoints still stuck in
the 50s. We may see enough moisture aloft to finally get a few
scraps of clouds, but if skies aren't completely blue, it should
be pretty close.

Short term [tonight through Thursday]...

look for light and variable winds to return tonight, but dewpoints
should be modestly higher, helping tonight be similarly modestly
warmer. However, more established onshore winds don't look to show
up until Wednesday morning. With the front expected Wednesday
night, that doesn't give us much chance for quality moisture
return. Still, by Wednesday night, the GFS and NAM both have
precipitable water increasing to around 1.5 inches (the SREF is a
little more modest in the 1.25 to 1.5 inch range), along with some
modest instability. Upper dynamics look fairly lousy with the
upper jet lingering too far behind the front. But, a decent low
level jet should help increase low level convergence into the
frontal zone. Expect that this will push convection back into the
cool sector some and elevate the convection. This will generally
limit severe potential, but steeper lapse rates aloft may allow
for the strongest storms to squeeze out some small hail. This is
likely more of a worst-case scenario. On the other hand, things
could play out more like the 00z ttu-wrf. Not dry, but not really
stormy, either. Some cooler and drier air will cool things down
for Thursday, but only by 5ish degrees, cutting highs into the
upper 70s rather than the lower 80s. Still fairly close to
seasonal averages.

Long term [Thursday night through Tuesday]...

in the late week, surface high pressure will drop into the area,
then eventually move off to the east, continuing our recent
pattern of rapid shifts from offshore winds in the wake of fronts
to the return of onshore winds as high pressure shifts east of the
region. In the stretch from this weekend into early next week,
multiple weak shortwave troughs pass near across southeast texas,
which may provide some low chances at showers. The weekend may be
too dry to squeeze anything out, so early next week should be the
next best shot at some showers. Next week, a more significant
upper trough should drop off the rockies, accompanied by lee
cyclogenesis. Right now, it appears the troughing will not dig
enough, and the front stalls out before reaching our area. Will
have to see which way the setup trends in the coming days. But,
for now, with relatively weak deep moisture and lack of strong
forcing, precip potential looks fairly limited.

Marine...

light winds and low seas should persist through Wednesday.

A weak cold front and associated showers will move off the
coast Wednesday night. Offshore winds behind the front
might reach caution levels for a short period Thursday
morning. The offshore flow will persist through the end
of the week as another cold front moves through the area
on Friday. Onshore winds that are expected to return
late Saturday or Saturday night should persist for the
remainder of the weekend and then strengthen into the
start of next week. At this time, it looks like caution
flags might be needed beginning late Monday or Monday
night for the increasing winds and building seas. 42

Preliminary point temps pops
College station (cll) 82 60 81 54 76 0 0 20 40 10
houston (iah) 83 62 83 58 78 0 0 10 30 10
galveston (gls) 76 67 76 63 74 0 0 10 30 20

Hgx watches warnings advisories
Tx... None.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 8 mi49 min Calm G 1 65°F 70°F1017.2 hPa
NCHT2 - 8770777 - Manchester, TX 10 mi49 min W 1.9 G 2.9 63°F 71°F1016.9 hPa
EPTT2 - 8771013 - Eagle Point, TX 22 mi49 min WNW 2.9 G 2.9 64°F 70°F1017.1 hPa
GRRT2 34 mi49 min N 5.1 G 6 64°F 71°F1017 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 34 mi49 min Calm G 1 66°F 70°F1016.7 hPa
GTOT2 35 mi49 min Calm G 1 65°F 73°F1017 hPa
RLOT2 - 8770971 - Rollover Pass, TX 35 mi49 min NNW 1.9 G 4.1 67°F 65°F1017.2 hPa
HIST2 39 mi49 min WNW 1 G 2.9 59°F 69°F1017.4 hPa
LUIT2 48 mi49 min N 6 G 7 65°F 1016.8 hPa

Wind History for Morgans Point, TX
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Last
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W4
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G14
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G15
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NW12
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G9
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G13
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G15
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G12
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N3
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W2
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E12
G15
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G17
E12
G16
SE10
G15
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G18
SE13
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SE11
G14
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G12
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G18
SE2
N8
G11
W6
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NW11
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NW15
G20

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX11 mi89 minSW 110.00 miA Few Clouds57°F55°F94%1017.3 hPa
Houston, Houston Hobby Airport, TX13 mi26 minN 09.00 miA Few Clouds58°F57°F97%1017.9 hPa
John Dunn Helistop, TX17 mi44 minN 010.00 miFair66°F55°F68%1017.3 hPa
Houston, Pearland Regional Airport, TX19 mi26 minN 010.00 miFair56°F55°F97%1017.9 hPa
Houston Intercontinental Airport, TX20 mi26 minN 010.00 miFair56°F55°F97%1017.7 hPa

Wind History from EFD (wind in knots)
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Last 24hrW5W5W8W7NW10
G16
W8
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G17
------NW11
G19
SW12NW6--CalmCalmCalmN1CalmSW2N2--SW1Calm
1 day agoSW13--NW10NW12NW12NW9NW10NW10NW14NW13NW12--NW6NW6NW7NW6N6N3N4CalmN2SE1SW2W5
2 days agoE10E10E13E13E13E16E16E9E11SE9SE10
G16
E7
G14
SE12SE7SE10SE11
G20
S8N10--W4--NW10NW10NW10

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Tue -- 03:27 AM CDT     Moonset
Tue -- 06:44 AM CDT     Sunrise
Tue -- 11:14 AM CDT     0.28 feet Low Tide
Tue -- 02:47 PM CDT     Moonrise
Tue -- 07:30 PM CDT     1.16 feet High Tide
Tue -- 07:52 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.90.90.90.90.80.70.60.50.40.30.30.30.40.50.70.911.11.21.21.111

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Tue -- 03:27 AM CDT     Moonset
Tue -- 06:44 AM CDT     Sunrise
Tue -- 10:45 AM CDT     0.25 feet Low Tide
Tue -- 02:47 PM CDT     Moonrise
Tue -- 07:26 PM CDT     1.66 feet High Tide
Tue -- 07:52 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.31.21.21.110.90.70.50.40.30.30.30.50.70.91.21.41.61.61.61.61.51.4

Weather Map and Satellite Images
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wmap_A
GOES Local Image of SouthCentralPlains    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (8,2,3,4)
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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.