Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Channelview, TX

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:09AMSunset 7:39PM Thursday March 30, 2017 1:35 AM CDT (06:35 UTC) Moonrise 8:13AMMoonset 9:40PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 1006 Pm Cdt Wed Mar 29 2017
Rest of tonight..South winds 5 to 10 knots becoming west 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
Thursday..Northwest winds 10 to 15 knots. Bay waters slightly choppy.
Thursday night..Southwest winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and Thunderstorms.
Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Sunday..Southeast winds 10 to 15 knots becoming south in the afternoon. Bay waters slightly choppy. Showers and Thunderstorms likely.
Sunday night..Southwest winds 10 to 15 knots becoming west after midnight. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Monday..West winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Monday night..Southwest winds around 10 knots becoming south after midnight. Bay waters smooth to slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1006 Pm Cdt Wed Mar 29 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Rough seas will continue to gradually decrease this evening. Seas will be slow to decrease due to the long southerly fetch. A pacific cold front is expected to move off the coast early Thursday morning and light to moderate northwest winds will develop in its wake. This offshore flow will persist into Friday but onshore winds will be returning to the area over the 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 300303
afdhgx
area forecast discussion
national weather service houston/galveston tx
1003 pm cdt Wed mar 29 2017

Discussion
Radar VWP shows flow above the sfc has gone mostly sw/w which
should keep things mostly dry overnight. Can't totally rule out
an isolated cell until the front clears the coast overnight, but
think patchy fog will be more likely with winds laying down, skies
clearing and ground being wet. Overall, not many changes for the
update other than to match obs/trends.

Expect a few days of quiet wx. But things look to get more active
later this weekend as a fairly potent storm system approaches from
the w/nw. Though finer details are still rough between most of
the models, they've been consistently showing signals that the
potential for some significant wx might exist somewhere near the
region between the late Saturday thru the early Monday timeframe.

Will dig deeper into this in the coming days. 47

Aviation
Much quieter forecast this go around. Skies have cleared to the east
but, there are some concerns with the possibility of some patchy fog
developing in that small time window before the arrival of the front
sometime overnight. Wet grounds/light winds/minimal dewpoint differ-
ences noted at this time. Cxo already reporting some patchy fog, and
would not be too surprised to see additional reports in the next few
hours. The cold front is currently moving across central tx and will
be arriving into SE tx overnight (cll@05-07z,iah@07-09z,gls@10-12z).

Vfr expected thereafter. 41

Prev discussion /issued 403 pm cdt Wed mar 29 2017/
strong thunderstorms continue to move east of the houston metro
this afternoon, but have left anywhere from 1 to over 3 inches of
rain and multiple reports of damage in their wake. This storm, and
associated storms stretching from polk county southwest to near
freeport. These storms will continue to translate east of the
region over the next few hours, clearing the region by 7 to 9 pm
cdt.

Afternoon water vapor imagery shows the compact upper level storm
system responsible for today's severe weather churning over
oklahoma, with another strong disturbance located farther up
stream off the pacific northwest coast. An upper trough axis
associated with the southern plains low will swing across texas
tonight, aiding the southeastward progress of a cold front
analyzed across west central texas this afternoon. Drying and
stabilization in the wake of today's storms should make the
frontal passage across the region a dry one, with Thursday morning
lows in the mid 50s to mid 60s about 10 degrees cooler than what
was observed this morning.

Westerly flow and shortwave ridging building across the region on
Thursday and Friday will allow for dry conditions to persist into
the beginning of the weekend, with temperatures dramatically
warming into the mid to possibly upper 80s by Friday and Saturday.

As the pacific northwest system drops across the four corners and
reaches the high plains on Saturday, low rain chances will return
to the region on Saturday as moisture returns to the region
(possibly along a developing sea breeze).

Increasing lift ahead of the approaching upper low will result in
periods of showers and thunderstorms spreading across the region
Sunday night, with the development of numerous showers and
thunderstorms possible Sunday and Sunday night as the main energy
from the upper low reaches the region. Given the upper pattern
across the region, both severe weather and heavy rain appear
possible per cips analog threat guidance on Sunday. Dry and warm
conditions are expected in the wake of Sunday's system into the
middle of next week. Huffman

Preliminary point temps/pops
College station (cll) 54 78 56 87 63 / 10 10 0 10 10
houston (iah) 59 78 57 86 65 / 10 10 0 10 10
galveston (gls) 64 75 66 79 71 / 10 10 0 10 10

Hgx watches/warnings/advisories
Tx... None.

Gm... Small craft should exercise caution until midnight cdt tonight
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.

Small craft advisory until midnight cdt tonight for the
following zones: waters from freeport to the matagorda ship
channel from 20 to 60 nm... Waters from high island to
freeport from 20 to 60 nm.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LYBT2 0 mi48 min S 1.9 G 2.9 69°F 74°F1008.5 hPa
MGPT2 - 8770613 - Morgans Point, TX 8 mi48 min WSW 1.9 G 2.9 70°F 74°F1009.3 hPa
NCHT2 - 8770777 - Manchester, TX 10 mi48 min Calm G 1.9 69°F 75°F1009.6 hPa
EPTT2 - 8771013 - Eagle Point, TX 22 mi48 min SSW 6 G 6 70°F 75°F1009.1 hPa
GRRT2 34 mi48 min SSW 5.1 G 6 73°F 75°F1009.4 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 34 mi54 min SSW 8 G 9.9 74°F
GTOT2 35 mi48 min 73°F 74°F
RLOT2 - 8770971 - Rollover Pass, TX 35 mi48 min SSW 5.1 G 7 73°F 75°F1009.5 hPa
HIST2 39 mi48 min SSW 5.1 G 7 72°F 76°F1009.6 hPa
LUIT2 48 mi48 min SSW 4.1 G 5.1 73°F

Wind History for Morgans Point, TX
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SE12
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX11 mi46 minNNW 410.00 miA Few Clouds66°F64°F94%1010.2 hPa
Houston, Houston Hobby Airport, TX13 mi43 minN 010.00 miA Few Clouds65°F63°F93%1009.7 hPa
John Dunn Helistop, TX17 mi61 minWNW 410.00 miFair73°F51°F47%1008.8 hPa
Houston, Pearland Regional Airport, TX19 mi43 minN 010.00 miFair67°F63°F87%1009.8 hPa
Houston Intercontinental Airport, TX20 mi43 minN 08.00 miPatches Fog65°F64°F97%1009.4 hPa

Wind History from EFD (wind in knots)
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Last 24hrSE16
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SE13SE12
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SE11CalmE3E7E9E13E12S8SE7E6W10W6E4CalmCalmCalmS3CalmS3S4NW4
1 day agoSE4SE5SE3SE6SE6SE4E6SE8SE10SE10SE11SE14SE12E13SE17SE17
G23
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2 days agoS5----SE5--SE5S6S6S8S11S11S12S12S14S14S13S11SE13SE8SE7SE4SE4SE4SE3

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Thu -- 05:37 AM CDT     0.13 feet Low Tide
Thu -- 07:11 AM CDT     Sunrise
Thu -- 09:13 AM CDT     Moonrise
Thu -- 01:03 PM CDT     1.27 feet High Tide
Thu -- 06:56 PM CDT     0.90 feet Low Tide
Thu -- 07:37 PM CDT     Sunset
Thu -- 10:39 PM CDT     Moonset
Thu -- 10:45 PM CDT     1.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.60.40.20.10.10.20.40.60.91.11.21.31.21.21.110.90.90.9111.1

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Thu -- 04:27 AM CDT     0.14 feet Low Tide
Thu -- 07:11 AM CDT     Sunrise
Thu -- 09:13 AM CDT     Moonrise
Thu -- 12:15 PM CDT     1.35 feet High Tide
Thu -- 05:44 PM CDT     1.01 feet Low Tide
Thu -- 07:37 PM CDT     Sunset
Thu -- 09:14 PM CDT     1.11 feet High Tide
Thu -- 10:39 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.60.40.20.10.20.30.50.70.91.11.31.31.31.31.21.11111.11.11.11

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 (2,6,7,8)
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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.