Wednesday, May22, 2019 L-36.com


Marine Weather and Tides
Clear Lake Shores, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:22AMSunset 8:11PM Wednesday May 22, 2019 7:39 PM CDT (00:39 UTC) Moonrise 10:52PMMoonset 8:35AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 333 Pm Cdt Wed May 22 2019
.small craft advisory in effect through Thursday morning...
Tonight..Southeast winds 15 to 20 knots. Bay waters choppy.
Thursday..Southeast winds 15 to 20 knots. Bay waters choppy.
Thursday night through Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..Southeast winds around 10 knots. Bay waters smooth to slightly choppy.
Sunday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Monday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 333 Pm Cdt Wed May 22 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Moderate to occasionally strong onshore winds and elevated seas will persist for the next couple of days. Wind speeds and seas should generally diminish Saturday with more typical summer wind patterns with higher winds offshore at night that relax during the day. The pressure gradient will tighten back up again early next week with a corresponding increase of winds and seas.


7 Day Forecast for Marine Location Near Clear Lake Shores, TX
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location: 29.55, -95     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 222349
afdhgx
area forecast discussion
national weather service houston galveston tx
649 pm cdt Wed may 22 2019

Aviation
Mostly MVFR ceilings across the SE tx terminals this evening and
those sites that are still atVFR criteria should be falling
shortly as decks lower. Holding on to MVFR ceilings through early
tomorrow morning, but with winds strengthening once again tonight,
not expecting ceilings to be able to fall to low MVFR criteria
besides potentially over the coastal terminals to around 1500
feet. Drier conditions work their way in over the region by
tomorrow morning, with some slightly better moisture anticipated
to pool over our southwestern zones, potentially impacting sgr
and lbx. Some of the short term guidance is trying to develop some
showers over this region in the early afternoon hours, but not
confident that we will see much of anything, and kept all taf
sites dry through the period. Gusty conditions will continue through
the overnight hours and into the afternoon tomorrow, with the
pressure gradient remaining rather tight over the region.VFR
ceilings look likely as the drier airmass ushers in by mid
morning, with the coastal terminals potentially holding on to high
MVFR decks through the afternoon. These sites may too scatter out
by the mid afternoon hours, before MVFR conditions return once
again by the early evening hours across SE tx.

Hathaway

Prev discussion issued 320 pm cdt Wed may 22 2019
discussion...

while not as breezy as yesterday, the wind is still fairly breezy
across the area. Despite that, temperatures continue to scrape to
around 90 degrees across the area this afternoon. Temperatures
will continue to be the focus of the next week or so, as the
environment continues to resemble something more like early summer
than spring.

Guidance is increasingly focused on a weak disturbance managing to
squeeze out a few showers and perhaps a thunderstorm tomorrow,
primarily in the west. It shouldn't amount to much, but tomorrow
may not be completely dry across southeast texas. For our next
significant chance of rain, we will have to look until the middle
of next week... Or longer.

Near term [through tonight]...

a variance of partly to mostly cloudy conditions are in place
across southeast texas this afternoon with nothing of note on the
radar screen. Winds of 15 to a little over 20 mph are occurring
across most of the area, with gusts of 25-30 mph. This puts us on
the edge of a wind advisory, but don't expect winds to come up any
more, so will hold off on that for now.

Despite the clouds and though winds should help with the vertical
mixing, we're still warming fairly well this afternoon. Several
spots have reached 90 degrees, with the rest of the area in the
upper half of the 80s. Tonight, those winds and clouds will have
the reverse impact on cooling, keeping temperatures up through the
night. Look for overnight lows to be even a bit warmer than last
night, only falling into the middle to upper 70s.

Short term [Thursday through Friday night]...

while no explicit record warm minimum temps are forecast at this
time, those records won't be entirely safe on Thursday - it will
be another day to watch the thermometer closely.

Guidance continues to indicate a very subtle upper vort max, and
nearly unanimously squeezes out some very light precip well to the
west of houston tomorrow afternoon. I suppose, with onshore flow
and the developing strong upper ridge centered well to our east,
that it's not out of the question. Precipitable water values in
that area are progged to be around or even a little above 1.5
inches, as well. Still, I would expect most everyone to stay dry.

I chose not to go higher than slight chance and low end chance
pops for the afternoon.

As the upper ridge continues over the southeast continues to
reign, Friday looks pretty much exactly like Thursday, only
without the rain chances.

Long term [Saturday through Wednesday]...

very little change through the weekend and into early next week.

The main question will be how far west does the upper ridge
migrate in the coming days? Some retrograde motion should be
expected, especially early in the work week, as i'd expect the
ridge to beef up a bit in advance of a deepening upper trough to
our west. The more the MAX heights drift our way, the warmer we
can expect to be. I've overshot the guidance consensus on highs in
this time frame, but not by much - just enough to keep highs
around the lower 90s and not slip back into the 80s. Regardless,
we should not see the torch action the southeastern states have
ahead of them.

For the midweek, we'll be watching how well the western trough can
break down the upper ridge as it moves east. This will potentially
bring our next solid chance of rain. The GFS is all on board with
this idea, and moves a pretty coherent line of showers and storms
into southeast texas. The canadian is a little less sure of the
idea, and the euro is strongly team ridge. This creates a split
even amongst blended guidance. Those blends that are more gfs-
heavy are giving me high pops, more euro-dominated blends are dry.

This is 8+ days out, so this seems like a perfect time to punt and
see where we're at after another run or two.

Marine...

persistent southeasterly flow on tap through at least early next
week. Winds should increase tonight to 15 to 25 knots then gradually
weaken Saturday 10-15 kts into early Monday then begin to increase
back up 15-20 knots again by late Monday. Seas of 6-10 feet
overnight in the offshore waters should gradually lessen Thursday
afternoon through Saturday with a persistent long SE fetch seas of 3-
7 feet should remain through the weekend. SCA in place for all of
the upper tx coastal waters tonight through 7 am Fri except
galveston bay through 7 am Thu and this will likely need a scec
after.

Coastal flood advisory will continue along the gulf facing coast.

Minor coastal flooding remains a possibility around times of high
tide. Wave run up and strong rip currents will prevail with building
seas overnight. As the seas slowly lower Friday as well as the
overall amplitude of the astronomical tide range the threat for
coastal flooding should slightly lower but will still have strong
rip currents.

45
climate...

low temperatures this morning were a good 10 to nearly 20 degrees
above normal across the area. As of this afternoon, galveston and
both houston climate sites are on pace to tie or break record warm
minimum temperatures for the day. But... We still have until
midnight for temperatures to fall below record values, so don't
start counting on records just yet. Check back overnight for the
official word.

Preliminary point temps pops
College station (cll) 76 89 74 89 72 0 10 0 0 0
houston (iah) 78 88 75 88 74 0 10 0 0 0
galveston (gls) 79 83 78 83 78 10 10 0 0 0

Hgx watches warnings advisories
Tx... Coastal flood advisory until 5 pm cdt Thursday for the following
zones: brazoria islands... Galveston island and bolivar
peninsula... Matagorda islands.

Gm... Small craft advisory until 7 am cdt Friday for the following
zones: coastal waters from freeport to matagorda ship
channel tx out 20 nm... Coastal waters from high island to
freeport tx out 20 nm... Matagorda bay... Waters from
freeport to matagorda ship channel tx from 20 to 60 nm...

waters from high island to freeport tx from 20 to 60 nm.

Small craft advisory until 7 am cdt Thursday for the following
zones: galveston bay.

Aviation... 08


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi40 min SSE 23 G 26 81°F 82°F1010.3 hPa (-0.5)
MGPT2 - 8770613 - Morgans Point, TX 9 mi40 min SE 13 G 19 82°F 81°F1011.2 hPa (-0.4)
GRRT2 18 mi40 min S 17 G 21 81°F 83°F1010.2 hPa (-0.4)
NCHT2 - 8770777 - Manchester, TX 19 mi40 min S 7 G 16 83°F 82°F1010.2 hPa (+0.0)
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi46 min SSE 23 G 26 85°F 82°F1010.4 hPa
GTOT2 20 mi40 min S 8 G 17 81°F 81°F1011.1 hPa (+0.0)
RLOT2 - 8770971 - Rollover Pass, TX 26 mi40 min SSE 19 G 23 81°F 82°F1011.8 hPa (+0.0)
HIST2 32 mi46 min SSE 7 G 12 81°F 82°F1011.5 hPa
LUIT2 33 mi40 min SSE 17 G 24 81°F 83°F1010.7 hPa (+0.0)
KXIH 36 mi25 min SE 23 81°F 77°F
42035 - GALVESTON 22NM East of Galveston, TX 38 mi40 min SE 19 G 25 80°F 80°F1012.1 hPa (-0.3)
42043 - GA-252 TABS B 40 mi100 min SE 16 G 19 82°F1010.7 hPa (+0.0)
FCGT2 - 8772447 - USCG Freeport, TX 45 mi46 min SE 19 G 24 81°F 82°F1011.1 hPa
FPST2 45 mi40 min SE 22 G 26 81°F 82°F1010.1 hPa (+0.0)

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi1.8 hrsSE 1210.00 miOvercast82°F71°F70%1010.8 hPa
Houston, Pearland Regional Airport, TX13 mi47 minSSE 12 G 208.00 miOvercast83°F75°F77%1011.1 hPa
Houston, Houston Hobby Airport, TX16 mi47 minSSE 159.00 miOvercast84°F73°F72%1011 hPa
Galveston, Scholes Field, TX21 mi48 minSE 16 G 246.00 miFog/Mist81°F77°F88%1011.4 hPa
John Dunn Helistop, TX24 mi45 minVar 3 G 145.00 miMostly Cloudy with Haze84°F75°F74%1010.5 hPa

Wind History from EFD (wind in knots)
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2 days agoSE10SE9SE8E8SE8SE6S9S10SE8SE5SE6SE8SE8SE9SE14SE14SE14SE14
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Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Wed -- 06:24 AM CDT     Sunrise
Wed -- 07:30 AM CDT     -0.12 feet Low Tide
Wed -- 09:36 AM CDT     Moonset
Wed -- 03:44 PM CDT     1.01 feet High Tide
Wed -- 08:10 PM CDT     Sunset
Wed -- 11:52 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.60.50.30.1-0-0.1-0.1-00.10.30.50.80.91110.90.90.90.90.90.8

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Wed -- 04:21 AM CDT     0.00 knots Slack
Wed -- 06:23 AM CDT     Sunrise
Wed -- 08:01 AM CDT     2.08 knots Max Flood
Wed -- 09:35 AM CDT     Moonset
Wed -- 03:19 PM CDT     -0.00 knots Slack
Wed -- 08:08 PM CDT     Sunset
Wed -- 11:50 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.2-2-1.6-1-0.30.51.31.92.121.71.30.90.60.40.1-0.2-0.4-0.6-0.7-0.9-1.2-1.5-1.8

Weather Map and Satellite Images
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GOES Local Image of    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 (20,4,5,8)
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Ground Weather Radar Station Houston/Galveston, TX
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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.