Monday, October23, 2017 L-36.com


Marine Weather and Tides
Galveston, 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 7:25AMSunset 6:41PM Monday October 23, 2017 6:31 AM CDT (11:31 UTC) Moonrise 9:43AMMoonset 8:38PM 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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GMZ375 Waters From Freeport To The Matagorda Ship Channel From 20 To 60 Nm-waters From High Island To Freeport From 20 To 60 Nm- 350 Am Cdt Mon Oct 23 2017
.small craft should exercise caution...
Today..North winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Seas 4 to 6 feet with occasional seas up to 7 feet.
Tonight..North winds around 10 knots increasing to 20 to 25 knots after midnight. Seas 3 to 5 feet.
Tuesday..North winds 20 to 25 knots. Seas 5 to 7 feet with occasional seas up to 8 feet.
Tuesday night..North winds 20 to 25 knots. Seas 5 to 7 feet with occasional seas up to 8 feet.
Wednesday..North winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Seas 4 to 6 feet with occasional seas up to 7 feet subsiding to 2 to 4 feet in the afternoon.
Wednesday night..Northwest winds 5 to 10 knots. Seas 2 to 3 feet.
Thursday..South winds 10 to 15 knots. Seas 1 to 2 feet.
Thursday night..South winds 15 to 20 knots. Seas 3 to 5 feet.
Friday..Southwest winds around 15 knots becoming northwest in the afternoon. Seas 3 to 5 feet. A chance of showers.
Friday night..North winds 15 to 25 knots becoming 20 to 25 knots after midnight. Seas 4 to 6 feet with occasional seas up to 7 feet. A slight chance of showers.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 350 Am Cdt Mon Oct 23 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Diminishing winds will occur today as high pressure moves overhead. A cold front is expected to move off of the coast early Tuesday morning. Strong offshore winds will develop behind the front Tuesday morning and then persist through Tuesday night. Winds will diminish on Wednesday and then become onshore by late Thursday as high pressure moves east of the area. Another cold front should arrive on Saturday.

7 Day Forecast for Marine Location Near Galveston, TX
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location: 28.84, -94.35     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 231115
afdhgx
area forecast discussion
national weather service houston galveston tx
615 am cdt Mon oct 23 2017

Aviation
Vfr conditions are expected through tonight. Isolated patches of
low-level ground fog was observed at klbx earlier but think the
chances are too low to include in the klbx forecast for now. If
the fog returns, it should burn off by around 14z. Winds may
increase to between 6 and 8 knots at most inland sites this
afternoon. A cold front will move across the area between 06z and
12z tonight and Tuesday morning. Do expect the northerly winds to
increase after the frontal passage, especially along the coast
after 09z Tuesday.

40

Prev discussion issued 347 am cdt Mon oct 23 2017
discussion...

at 3 am, surface high pressure was located over deep south texas
with northerly winds bringing drier air into the region. Surface
dew points are in the upper 40s to lower 50s. Ideal radiational
cooling is ongoing and temperatures have already fallen into the
upper 40s to mid 50s over most of the region and a further drop
before sunrise is likely. The dry nature of the current air mass
should allow for a large diurnal range in temperatures today and
high temperatures today warm to around 80 degrees under full sun.

A secondary surge of colder and drier air should cross SE tx
tonight. Tuesday and Wednesday look cooler and drier. Elevated
fire weather conditions look possible on Tuesday as rh values fall
near or below 25 percent and north winds increase to around 15
mph. It remains dry on Wednesday but winds are progged to be
lighter. 850 mb temps are near 5 c on Wednesday and bringing that
down dry adiabatically only produces high temps in the mid upper
60s. Numerical guidance is significantly warmer so split the
difference between the two camps for high temps. Onshore winds
return Wed night and a warm up begins on Thursday. A cold front
will cross the region on Fri morning and moisture is not looking
too impressive at this time with pw values reaching 0.90 inches.

Will carry 20 pops with the front on Friday. The ECMWF is still
advertising a weak isentropic upglide event in the wake of the
front but the ec is now trending faster with the front and
associated upper level trough. The canadian looks similar to the
gfs so have leaned toward the drier solutions for next weekend. 43
marine...

winds will continue to diminish across the coastal waters and bays
today as a surface high pressure area moves across the texas coastal
areas. The next front will move off of the coast late Monday night.

Offshore winds behind this front will reach advisory levels Tuesday
morning and persist through Tuesday night. Another surface high
pressure ridge will move overhead and help diminish winds below
criteria Wednesday morning. Onshore winds are expected by Thursday.

Another strong front is expected to move off of the coast on Friday.

40
fire...

elevated fire weather conditions are expected today through
Wednesday with Tuesday the driest day. Minimum relative humidity
values will fall to between 25 and 30 percent this afternoon, around
25 percent on Tuesday, and 25 to 30 percent on Wednesday. Light
winds of about 5 mph are expected today away from the coast. The
coastal counties should see northerly winds of 5 to 10 mph. A cold
front will move across southeast texas tonight and move off of the
coast early Tuesday morning. Winds behind this front will reach from
15 to 20 mph during Tuesday afternoon. A deep layer of 25 to 30 mph
winds will persist above the ground surface Tuesday afternoon as
well. The wind speeds will diminish on Wednesday and speeds will
likely only range from 5 to 10 mph inland to about 10 mph near the
coast. Onshore winds will help return gulf moisture back across the
area on Thursday.

40

Preliminary point temps pops
College station (cll) 81 54 74 46 74 0 0 0 0 0
houston (iah) 80 56 74 50 72 0 0 0 0 0
galveston (gls) 80 65 75 60 72 0 0 0 0 0

Hgx watches warnings advisories
Tx... None.

Gm... Small craft should exercise caution 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... 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... 43
aviation marine... 40


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KXIH 25 mi37 min ENE 17 66°F 50°F
42035 - GALVESTON 22NM East of Galveston, TX 27 mi42 min N 16 G 19 67°F 78°F2 ft1019.7 hPa (+0.5)53°F
GTOT2 40 mi44 min 64°F 75°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 41 mi50 min NNE 12 G 14 72°F1019.7 hPa
GRRT2 43 mi44 min W 13 G 16 66°F 72°F1020.3 hPa
LUIT2 44 mi44 min N 11 G 13 66°F 1020.1 hPa
RLOT2 - 8770971 - Rollover Pass, TX 47 mi44 min NNE 8.9 G 11 59°F 70°F1020.1 hPa

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
High Island 179A (Apache Corp), LA25 mi57 minNE 1910.00 miFair and Breezy66°F50°F56%1019.3 hPa

Wind History from XIH (wind in knots)
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Last 24hrW6CalmNE5NE36
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2 days ago--------------SE13
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Tide / Current Tables for Galveston Pleasure Pier, Gulf Of Mexico, Texas (sub)
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Galveston Pleasure Pier
Click for Map
Mon -- 12:02 AM CDT     1.94 feet Low Tide
Mon -- 03:16 AM CDT     2.18 feet High Tide
Mon -- 07:25 AM CDT     Sunrise
Mon -- 10:44 AM CDT     Moonrise
Mon -- 11:45 AM CDT     0.50 feet Low Tide
Mon -- 06:40 PM CDT     Sunset
Mon -- 07:37 PM CDT     2.42 feet High Tide
Mon -- 09:39 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.922.12.22.22.11.91.71.310.70.50.50.60.91.21.622.22.42.42.32.22.1

Tide / Current Tables for Galveston (Pleasure Pier), Texas
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Galveston (Pleasure Pier)
Click for Map
Mon -- 01:04 AM CDT     1.66 feet Low Tide
Mon -- 04:22 AM CDT     1.79 feet High Tide
Mon -- 07:25 AM CDT     Sunrise
Mon -- 10:44 AM CDT     Moonrise
Mon -- 11:55 AM CDT     0.42 feet Low Tide
Mon -- 06:40 PM CDT     Sunset
Mon -- 08:00 PM CDT     2.28 feet High Tide
Mon -- 09:39 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.71.71.71.81.81.71.51.20.90.70.50.40.50.711.41.822.22.32.22.12

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.