Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Surfside Beach, 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 7:56PM Thursday April 26, 2018 8:26 AM CDT (13:26 UTC) Moonrise 3:52PMMoonset 3:50AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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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GMZ355 Coastal Waters From Freeport To The Matagorda Ship Channel Out 20 Nm-coastal Waters From High Island To Freeport Out 20 Nm- 316 Am Cdt Thu Apr 26 2018
.small craft should exercise caution early this morning...
Today..North winds 15 to 20 knots early this morning becoming northwest 5 to 10 knots in the afternoon. Seas 2 to 3 feet.
Tonight..Southwest winds 5 to 10 knots becoming north after midnight. Seas 1 foot.
Friday..North winds 5 to 10 knots becoming east in the afternoon. Seas 1 foot.
Friday night..South winds 5 to 10 knots becoming north after midnight. Seas 1 foot.
Saturday..Northeast winds 5 to 10 knots becoming southeast in the afternoon. Seas 1 foot.
Saturday night..Southeast winds 5 to 10 knots. Seas 1 foot.
Sunday..East winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Seas 1 to 2 feet.
Sunday night..Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Monday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A slight chance of showers and Thunderstorms.
Monday night..Southeast winds around 15 knots. Seas 4 to 5 feet with occasional seas up to 6 feet.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 316 Am Cdt Thu Apr 26 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Elevated offshore winds in the wake of a cold front are expected to decrease today. A lighter offshore flow can be expected tonight and Friday. With low seas over the weekend...light northeast winds become southeast. Strengthening onshore winds and building seas can be expected for much of next week.

7 Day Forecast for Marine Location Near Surfside Beach, TX
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location: 29.04, -95.18     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 261126
afdhgx
area forecast discussion
national weather service houston galveston tx
626 am cdt Thu apr 26 2018

Aviation
Skies are gradually clearing from north to south early this
morning. Monitoring some fog north of uts. All sites should
beVFR today with N to NW winds 5-10 knots. Weaker winds
tonight with some high clouds possible moving into the area
from the west.VFR tomorrow with N to NW winds 5-10 knots.

42

Prev discussion issued 352 am cdt Thu apr 26 2018
discussion...

fair weather expected through at least the weekend - cooler today
than earlier in the week thanks to the recent frontal passage.

Each succeeding day looks to be a bit warmer, but temperatures
stay pretty close to seasonal averages. Chances for precipitation
return early next week, but considerable uncertainty in just how
much potential there is until late in the week, just beyond the
end of the current forecast period.

Near term [through today]...

obs show that winds have turned north northwesterly across
southeast texas, and dewpoints have fallen below 60 degrees every
in the area but at palacios (at 60.1 degrees, of course). It is
relatively safe to say that the front has passed. Some low clouds
linger in the immediate post-frontal zone, but the radar is pretty
clear - drizzle at the absolute most. The clearing line has
reached roughly to a brenham-conroe line, and behind that are the
fair skies that will dominate most of the time into the weekend.

Lows this morning look to fall below 50 degrees in the far north
as colder and drier air tries to work into the area, while most
bottom out in the 50s, and dewpoint obs show that we have that
floor established already. After that, despite the pretty sunny
skies, today will be noticeably cooler than most of the week so
far. That said, we're nearly to may, and sunny skies can warm
things pretty effectively. Have highs in the 70s across the area.

Short term [tonight through Sunday]...

biggest challenge into the weekend is likely to come with low
temperatures. A weak, reinforcing cold front looks to move into
the area late tonight or early tomorrow morning... But i'm
wondering if the front may bring enough brief clouds and or keep
up winds enough to ruin ideal radiational cooling and actually
overcome any additional cold advection. My inner perfectionist
may come to regret this, but keep lows a little higher in the
coming couple of nights relative to this morning. The more
pragmatic part has to remind the rest of me that the impacts of
the upper 40s versus the lower 50s are not likely to be terribly
significant.

Days in this period should be pretty pleasant. Keeping the lows up
a touch give me the confidence to introduce some 80 degree highs
tomorrow and make that area a little bit bigger each day until
most all of southeast texas is maxing out in the lower 80s by
Sunday. If it gets warm enough, we may see the semblances of a sea
breeze set up in the afternoons. It may be a little inconsistent
at first, but as surface high pressure drifts off to our east, we
should see onshore winds return by late Sunday afternoon or
evening.

Long term [Sunday night through Thursday]...

in addition to the surface high moving off, the weekend's ridging
aloft should also be moving on for early next week. This will help
deepen the low level onshore flow, improving moisture return. It
will also set us up for a "string-of-pearl" chain of vort maxes to
cross the area early next week. Because of this, we'll see
increasing clouds and introduce some slight chance pops as early
as Monday. While i'm reasonably certain that we'll squeeze some
showers and maybe even some storms out of this setup at some point
in the first half of the week, I have basically zero confidence
in timing out such a fragile setup this far out. The result is a
bunch of slight chance and low end chance pops splattered
throughout the entire first half of the week. In other words... The
most recent xkcd comic (number 1985, for posterity) is
disturbingly appropriate to my situation tonight and i'll be
keeping my eye out for security for the rest of my shift...

another more significant chance of rain looks to be on tap just
beyond the end of this forecast period. Guidance is very gung ho
on rain, and if this period were a part of the official forecast,
i'd undercut it significantly on pops. This is partly due to
range, and partly due to the underperformance of the last couple
of fronts. Let's be honest, here - the nascent beginning of a
seabreeze pattern, some more spacing between fronts, more
underwhelming fronts, and the fact that it's late april... We're
not there yet, and there's still some springtime to be had in the
coming weeks, but it's time to brace yourselves, as summer is
coming.

Marine...

elevated offshore winds in the wake of a cold front
are expected to decrease today (caution flags are in
effect early this morning). A lighter offshore flow
can be expected tonight and Friday. With low seas
over the weekend, light northeast winds become
southeast as high pressure moves off to the east.

Strengthening onshore winds and building seas can
be expected for much of next week. Caution flags
are likely (maybe beginning as early as Monday or
Monday night), and advisories might be needed. 42

Preliminary point temps pops
College station (cll) 75 54 80 54 81 0 0 0 0 0
houston (iah) 77 57 81 56 81 0 0 0 0 0
galveston (gls) 73 64 77 64 76 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... Galveston bay...

matagorda bay... 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
LUIT2 4 mi38 min N 14 G 19 60°F 1016.5 hPa
FCGT2 - 8772447 - USCG Freeport, TX 9 mi38 min N 7 G 11 59°F 72°F1017.5 hPa
GRRT2 24 mi38 min N 17 G 21 60°F 72°F1016.5 hPa
GTOT2 28 mi38 min NNE 12 G 19 60°F 73°F1016.5 hPa
SGNT2 30 mi38 min N 8.9 G 12 59°F 73°F1016.8 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 33 mi44 min NNE 19 G 22 59°F 71°F1015.9 hPa
EPTT2 - 8771013 - Eagle Point, TX 34 mi44 min N 8.9 G 15 58°F 73°F1016.7 hPa
KXIH 36 mi31 min N 21 61°F 50°F
EMAT2 45 mi44 min N 8.9 G 11 58°F 71°F1016.6 hPa
MGPT2 - 8770613 - Morgans Point, TX 46 mi38 min N 11 G 14 57°F 70°F1017.2 hPa
NCHT2 - 8770777 - Manchester, TX 48 mi38 min NNW 6 G 8.9 57°F 71°F1016.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 48 mi38 min N 16 G 18 60°F 67°F1016.5 hPa

Wind History for USCG Freeport, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Angleton / Lake Jackson, Brazoria County Airport, TX16 mi33 minN 710.00 miPartly Cloudy59°F48°F67%1017.3 hPa
Galveston, Scholes Field, TX23 mi34 minN 1710.00 miMostly Cloudy60°F50°F70%1017.2 hPa

Wind History from LBX (wind in knots)
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Last 24hrCalmS5S5S7S7S8S5SW7S12S12SW7
G15
SW6SW4NW43NW11
G17
NW5NW7NW8N8N8N11N9N7
1 day agoCalmN43N53N543S9S7S6S6S5S5SW4CalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoW3W4NW6NW7N8NW7NW11
G15
NW9NW6NW7NW7N3CalmS4CalmCalmCalmCalmCalmCalmCalmN4CalmN3

Tide / Current Tables for Christmas Bay, Texas
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Christmas Bay
Click for Map
Thu -- 04:50 AM CDT     Moonset
Thu -- 06:43 AM CDT     Sunrise
Thu -- 06:52 AM CDT     0.77 feet High Tide
Thu -- 11:21 AM CDT     0.12 feet Low Tide
Thu -- 04:51 PM CDT     Moonrise
Thu -- 07:52 PM CDT     0.80 feet High Tide
Thu -- 07:53 PM CDT     Sunset
Thu -- 11:56 PM CDT     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.20.30.40.60.70.70.80.70.50.20.10.10.20.20.40.50.60.70.80.80.70.40.2

Tide / Current Tables for Freeport Harbor, Texas
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Freeport Harbor
Click for Map
Thu -- 01:12 AM CDT     1.38 feet High Tide
Thu -- 04:50 AM CDT     Moonset
Thu -- 06:44 AM CDT     Sunrise
Thu -- 07:34 AM CDT     0.25 feet Low Tide
Thu -- 02:11 PM CDT     1.46 feet High Tide
Thu -- 04:52 PM CDT     Moonrise
Thu -- 07:54 PM CDT     Sunset
Thu -- 08:11 PM CDT     0.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.41.31.10.90.60.40.30.30.40.50.81.11.31.51.41.210.70.60.50.50.70.9

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.
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Wind Forecast for Houston/Galveston, TX (9,2,3,4)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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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.