Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Houston, 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 7:09AMSunset 7:17PM Saturday September 23, 2017 5:00 PM CDT (22:00 UTC) Moonrise 9:17AMMoonset 8:45PM Illumination 11% 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 Galveston Bay- 246 Pm Cdt Sat Sep 23 2017
Tonight..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms early in the evening.
Sunday..East winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Sunday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..East winds around 10 knots. Bay waters smooth to slightly choppy. A chance of showers and Thunderstorms.
Monday night..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms after midnight.
Tuesday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots. Bay waters smooth.
Wednesday..East winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots becoming east after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms.
Thursday..Northeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Thursday night..Northeast winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A slight chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 246 Pm Cdt Sat Sep 23 2017
Synopsis for high island to matagorda ship channel out 60 nm.. A light to moderate onshore flow with 2 to 3 foot seas should prevail into the mid part of the upcoming week. Tides will run slightly above normal with the onshore flow, but should not reach any coastal impact criteria. Isolated showers and Thunderstorms can be expected daily, especially during pre-dawn hours. A cold front will move offshore late next week and will increase winds and seas by next weekend.

7 Day Forecast for Marine Location Near Houston, TX
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location: 29.74, -95.33     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 232022
afdhgx
area forecast discussion
national weather service houston galveston tx
322 pm cdt Sat sep 23 2017

Discussion
Temperatures have warmed to near 90 and some showers are beginning
to develop. Should continue to get some isolated widely scattered
showers through about 600 pm before the loss of heating puts the
kibosh on precip. SREF ensemble guidance suggest some potential
for patchy fog late tonight and this seems reasonable as nam
soundings show mstr trapped beneath a strong capping inversion.

Pw values drop to around 1.45 inches on Sunday and convective
temps remain in the upper 80's. Fcst soundings look dry so not
convinced the area will receive much more than an isolated
shower... Mainly over the SW zones (deeper mstr). Weak upper
level ridging will try to develop over the western gulf between a
deep upper level tough over the intermountain west and maria to
the east. The ridge will impart some subsidence over the region
and despite some increase in moisture, rainfall will likely remain
sparse through mid week. 850 mb temps remain warm through Thursday
and high temps will remain around 90 degrees. Overnight lows will
remain unseasonably warm as SE winds maintain sfc dew pts in the
lower and middle 70s.

Finally some relief from the warm and humid conditions as cold
front approaches the region. A strong upper level trough over the
great lakes will produce a strong northerly upper flow and this
will help suppress the upper ridge and a sfc cold front will
undercut the ridge on Friday. Cooler and drier air will filter
into the region late Friday. The ECMWF is wetter next Saturday as
weak isentropic upglide behind the front could bring some light
rain while the GFS looks considerably drier. For now, have leaned
toward the drier gfs. 43

Marine
A light to moderate onshore flow with 2 to 3 foot seas should
prevail into the mid part of the upcoming week. Tides will run
slightly above normal with the onshore flow, but should not reach
any coastal impact criteria. Isolated showers and thunderstorms can
be expected daily, especially during pre-dawn hours.

A cold front will move offshore late next week and will increase
winds and seas by next weekend. 44

Preliminary point temps pops
College station (cll) 72 90 72 90 72 20 10 10 30 10
houston (iah) 73 90 73 89 73 20 20 10 30 10
galveston (gls) 79 89 80 88 79 20 20 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
NCHT2 - 8770777 - Manchester, TX 4 mi42 min SSE 8 G 11 88°F 82°F1010.6 hPa
MGPT2 - 8770613 - Morgans Point, TX 19 mi42 min SE 8 G 12 85°F 84°F1011.7 hPa
EPTT2 - 8771013 - Eagle Point, TX 28 mi48 min SE 11 G 13 84°F 86°F1012 hPa
GRRT2 38 mi42 min NNE 9.9 G 12 85°F 86°F1011.9 hPa
GTOT2 41 mi42 min 85°F 85°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 42 mi48 min ESE 11 G 12 85°F1011.6 hPa
RLOT2 - 8770971 - Rollover Pass, TX 46 mi42 min SE 11 G 13 83°F 88°F1012 hPa
LUIT2 47 mi42 min E 13 G 15 83°F

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John Dunn Helistop, TX4 mi65 minSE 7 G 1310.00 miA Few Clouds90°F69°F52%1011.2 hPa
Houston, Houston Hobby Airport, TX7 mi2.1 hrsSE 1010.00 miPartly Cloudy90°F71°F54%1012.3 hPa
Houston / Ellington, TX12 mi70 minESE 1010.00 miPartly Cloudy88°F71°F59%1012.5 hPa
Houston Intercontinental Airport, TX16 mi67 minESE 910.00 miPartly Cloudy90°F68°F49%1011.2 hPa
Houston Southwest Airport, TX18 mi65 minSE 710.00 miPartly Cloudy89°F71°F57%1011.8 hPa
Houston, Sugar Land Municipal / Hull Field Airport, TX19 mi3.1 hrsESE 810.00 miMostly Cloudy91°F71°F52%1012.2 hPa

Wind History from MCJ (wind in knots)
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Last 24hrN10N6N8N5N4N5N4N5N4N3N4N4N4N4CalmN5N7N6N7N3
G10
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SE10E10
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1 day agoN6NE3N4N5N6N8N11N7N8N8N6N6N5N6N4N5N6N7N7N6
G13
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2 days agoN12
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N9N8N8N7N6N7N7N7N7N6N5N4N6N9N5CalmN8N8N7N6

Tide / Current Tables for Houston Ship Channel, Galveston Bay, Manchester, Texas
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Houston Ship Channel
Click for Map
Sat -- 12:32 AM CDT     1.60 feet High Tide
Sat -- 06:42 AM CDT     1.09 feet Low Tide
Sat -- 07:10 AM CDT     Sunrise
Sat -- 10:16 AM CDT     Moonrise
Sat -- 11:11 AM CDT     1.38 feet High Tide
Sat -- 06:21 PM CDT     0.55 feet Low Tide
Sat -- 07:15 PM CDT     Sunset
Sat -- 09:44 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.61.51.41.31.21.11.11.11.21.31.41.41.31.10.90.80.60.60.60.70.91.11.3

Tide / Current Tables for San Jacinto Battleground State Historic Site, Texas
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San Jacinto Battleground State Historic Site
Click for Map
Sat -- 12:03 AM CDT     1.77 feet High Tide
Sat -- 05:49 AM CDT     1.38 feet Low Tide
Sat -- 07:09 AM CDT     Sunrise
Sat -- 10:16 AM CDT     Moonrise
Sat -- 10:36 AM CDT     1.65 feet High Tide
Sat -- 05:50 PM CDT     0.84 feet Low Tide
Sat -- 07:15 PM CDT     Sunset
Sat -- 09:44 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.71.71.61.51.41.41.41.51.61.61.61.61.51.31.110.90.80.911.21.41.6

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 (18,4,5,8)
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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.