Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Kemah, 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 7:07AMSunset 7:19PM Wednesday September 20, 2017 11:17 AM CDT (16:17 UTC) Moonrise 6:26AMMoonset 6:55PM Illumination 0% Phase: New Moon; Moon at 29 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- 1001 Am Cdt Wed Sep 20 2017
Rest of today..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Tonight..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Thursday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..Southeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms in the evening.
Friday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Friday night..Southeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms.
Saturday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Saturday night..Southeast winds 10 to 15 knots becoming east 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms.
Sunday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A chance of showers and Thunderstorms.
Sunday night..Southeast winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth 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 1001 Am Cdt Wed Sep 20 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Light to occasionally moderate southeast winds and seas near 2 to 3 feet are expected to persist through the weekend and into early next week. A few showers will be possible each morning.

7 Day Forecast for Marine Location Near Kemah, TX
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location: 29.55, -94.97     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 201443
afdhgx
area forecast discussion
national weather service houston galveston tx
943 am cdt Wed sep 20 2017

Discussion
Expect most of the area to be partly cloudy today with temperatures
warming into the 90s (slightly above normal temperatures for this time
of the year). Already seeing some showers and thunderstorms near the
coast, and the area should see showers and thunderstorms to continue
to develop as the day progresses, with the greatest concentration
probably setting up generally along and to the east of i-45. Current
forecast has things covered, and only minor changes were made on the
morning update. 42

Prev discussion issued 652 am cdt Wed sep 20 2017
aviation... 12z taf
radar shows a few showers off the coast near kgls with most
observations showing fog low clouds. There are a range ofVFR to
lifr conditions across the area with even quarter mile visibility
at kcxo. That has since improved and think most terminals will
experience changes in visibility. Ceilings are for the most part
vfr across the area but that has not always been the case.

Possible to get some MVFR ifr ceilings for kcll kuts kcxo like
yesterday through about 14z. Expect ceilings to improve through
18z but there could even be an hour or two with MVFR. Afternoon
period should beVFR with widely scattered shower development
across much of the area. Possible an isolated tsra could develop
but will wait to add that to tafs. Confidence is still low on
tsra especially given trends in hrrr and other hi-res models.

Winds should decouple again and likely have more low clouds fog
tomorrow morning. Thunderstorm chances look better tomorrow but
beyond the 24 30hr TAF period.

Overpeck
prev discussion... Issued 351 am cdt Wed sep 20 2017
discussion...

the upper level shortwave ridge that moved over SE texas yesterday
was now east of the area. A shortwave trough will be moving across
the forecast area today. Not a lot of activity has resulted so far
early this morning with this system. Pws over SE texas ahead of
the shortwave were lower than 24 hours ago and ranged from about
1.7 to 1.9 inches. Model pw forecasts do not differ much from the
satellite derived pws throughout the day today. The high
resolution models do indicate a potential for isolated to
scattered showers and thunderstorms.

The pattern aloft is still expected to develop into an upper
trough across la into SE texas with an upstream high pressure
ridge over N texas into the hill country. This should translate
into isolated to scattered showers and thunderstorms mainly during
the daytime hours on Thursday and Friday. The upper level high
pressure ridge should then knock down the rain chances a bit;
although, a blend of the models still shows daily isolated
coverage. Do expect rain chances to increase beginning on Monday
as the main upper trough over the rockies begins to slowly move
eastward into the plains. As it does so, SE texas should begin to
see an increase in moisture and warm air advection. In turn,
shortwave troughs moving ahead of the main trough will in help to
destabilize the airmass enough for scattered showers and
thunderstorms.

Marine...

persistent southeast winds across the upper texas coast will
continue to support seas around 3 feet for the rest of the week
and into the weekend. Passing showers will be possible the next
couple of days but more so on Thursday with higher moisture over
the gulf. Tide levels will be about a half foot to 1 foot above
normal especially along gulf facing beaches and western portions
of galveston bay.

Overpeck

Preliminary point temps pops
College station (cll) 93 75 90 73 91 20 0 40 10 20
houston (iah) 92 77 90 75 91 40 10 40 20 20
galveston (gls) 89 80 86 79 87 20 20 30 20 20

Hgx watches warnings advisories
Tx... None.

Gm... None.

11 42


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi48 min S 14 G 15 85°F 84°F1014.9 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi48 min S 8 G 12 86°F 82°F1014.9 hPa
GRRT2 18 mi48 min E 9.9 G 12 85°F 85°F1015.2 hPa
GTOT2 19 mi48 min 84°F 84°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 19 mi48 min S 9.9 G 12 83°F1014.7 hPa
NCHT2 - 8770777 - Manchester, TX 20 mi48 min SSW 6 G 12 85°F 81°F1014 hPa
RLOT2 - 8770971 - Rollover Pass, TX 24 mi48 min SSE 6 G 8.9 80°F 83°F1015.5 hPa
HIST2 31 mi48 min SW 8 G 15 79°F 84°F1015.6 hPa
LUIT2 34 mi48 min S 9.9 G 16 86°F
KXIH 35 mi23 min
42035 - GALVESTON 22NM East of Galveston, TX 37 mi78 min S 9.7 G 12 83°F 83°F3 ft1014.4 hPa (+1.8)80°F
FCGT2 - 8772447 - USCG Freeport, TX 45 mi48 min SSE 11 G 13 84°F 84°F1015.2 hPa

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX12 mi28 minS 710.00 miMostly Cloudy86°F77°F75%1015.2 hPa
Houston, Pearland Regional Airport, TX15 mi25 minS 119.00 miThunderstorm in Vicinity88°F73°F63%1015 hPa
Houston, Houston Hobby Airport, TX18 mi25 minSSW 7 G 1610.00 miPartly Cloudy90°F75°F63%1014.8 hPa
Galveston, Scholes Field, TX20 mi26 minS 1210.00 miPartly Cloudy90°F80°F73%1015.2 hPa

Wind History from EFD (wind in knots)
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Last 24hrS9S9S9SE9SE11SE12S8S9S6S6S4SE5SE5SE5SE4SE4S5SE3SE3CalmCalmSE3S9S7
1 day agoSE7--S9S5S5S9SE9SE7SW4N4CalmCalmE4SE3S5CalmCalmCalmCalmS3CalmS5S9S6
2 days agoNE3S6E3SE6SE9E8E9SE7SE7SE7SE5--CalmE3------CalmCalmCalmCalmSE3SE3S5

Tide / Current Tables for Eagle Point, Texas
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Eagle Point
Click for Map
Wed -- 12:30 AM CDT     New Moon
Wed -- 02:58 AM CDT     0.34 feet Low Tide
Wed -- 07:07 AM CDT     Sunrise
Wed -- 07:26 AM CDT     Moonrise
Wed -- 09:08 AM CDT     1.10 feet High Tide
Wed -- 03:14 PM CDT     0.58 feet Low Tide
Wed -- 07:18 PM CDT     Sunset
Wed -- 07:54 PM CDT     Moonset
Wed -- 09:00 PM CDT     1.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.30.40.50.70.911.11.110.80.70.60.60.60.70.811.11.11.11

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Wed -- 12:30 AM CDT     New Moon
Wed -- 02:39 AM CDT     0.00 knots Slack
Wed -- 05:18 AM CDT     1.20 knots Max Flood
Wed -- 07:06 AM CDT     Sunrise
Wed -- 07:25 AM CDT     Moonrise
Wed -- 08:53 AM CDT     -0.00 knots Slack
Wed -- 12:36 PM CDT     -0.72 knots Max Ebb
Wed -- 03:12 PM CDT     0.00 knots Slack
Wed -- 05:24 PM CDT     0.67 knots Max Flood
Wed -- 07:17 PM CDT     Sunset
Wed -- 07:48 PM CDT     -0.00 knots Slack
Wed -- 07:54 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.3-1-0.50.20.91.21.10.80.4-0-0.3-0.5-0.7-0.7-0.5-0.10.40.60.60.3-0.1-0.5-0.8-1

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 (12,3,4,5)
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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.