Sunday, February17, 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 6:56AMSunset 6:12PM Sunday February 17, 2019 7:41 PM CST (01:41 UTC) Moonrise 4:10PMMoonset 5:19AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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 Expires:201902181015;;094809 Fzus54 Khgx 172142 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 342 Pm Cst Sun Feb 17 2019 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz330-335-181015- Matagorda Bay-galveston Bay- 342 Pm Cst Sun Feb 17 2019
.small craft advisory in effect through Monday morning...
Tonight..North winds increasing to 20 to 25 knots. Bay waters becoming rough.
Monday..Northeast winds 15 to 20 knots. Bay waters choppy. A slight chance of rain in the afternoon.
Monday night..Northeast winds 15 to 20 knots. Bay waters choppy. A chance of showers. Isolated Thunderstorms after midnight.
Tuesday..East winds 15 to 20 knots becoming southeast 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon. Showers and Thunderstorms likely. Patchy fog in the afternoon.
Tuesday night..Southwest winds 10 to 15 knots becoming northwest after midnight. Bay waters slightly choppy. Patchy fog. Showers likely and isolated Thunderstorms.
Wednesday..North winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
Wednesday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. Showers likely and isolated Thunderstorms.
Thursday..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
Thursday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
Friday..East winds 5 to 10 knots becoming southeast in the afternoon. Bay waters smooth becoming smooth to slightly choppy in the afternoon. A chance of showers and isolated Thunderstorms.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and isolated Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 342 Pm Cst Sun Feb 17 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Look for increasing northeast winds and building seas tonight through Monday night. Unsettled weather expected for much of the week with upper level disturbances moving overhead and a coastal trough situated off the coast. A brief period of sea fog is possible Tuesday afternoon and Tuesday night.


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 172341
afdhgx
area forecast discussion
national weather service houston galveston tx
541 pm cst Sun feb 17 2019

Aviation
Vfr overnight with some cirrus. North winds 5 to 10 knots well inland
and closer to 10 to 20 knots and gusty elsewhere, becoming northeast
during the day tomorrow. Expecting to see increasing clouds (around
5000 feet) beginning tomorrow afternoon near the coast and spreading
inland tomorrow night. Next best chance for rain looks to be setting
up tomorrow night into Tuesday morning (after 19 06z) with better chances
(and deteriorating flying conditions) coming during the day on Tuesday.

42

Prev discussion issued 316 pm cst Sun feb 17 2019
discussion...

a few patches of light rain and drizzle are still occurring along
the upper texas coast, but the patchy rain is shifting E NE of
the forecast area. The western half of SE texas is seeing some sun
this afternoon and temps have warmed several degrees there. Will
continue to see clouds on the decrease this evening and expect all
inland areas to see min temps in the 40s tonight with north winds
remaining in the 10 to 15 mph range.

The good news is tomorrow looks rain-free, but the bad news is
this is likely our last rain free day this week. The mid upper
level pattern will amplify this week and features a large deep
slow moving trough across the western u.S. We will see an active
upper level jet moving SW to NE over texas this week with a
series of upper level disturbances moving across the state. This
will set the stage for a wet period with episodes of showers and
thunderstorms, ending when the upper trough moves across and east
of the area likely late next weekend.

Further forecast details for this week: moisture levels will
begin increasing again on Monday night and a warm front will move
onshore on Tuesday with a surface low developing and moving ne
along the texas coast. The combination of a surface boundary,
instability, upper level lift and diffluence, as wells as
increasing moisture, will produce numerous showers and
thunderstorms. Behind that upper level disturbance and the sfc low,
the warm front retreats offshore and we should have a drier day
on Wednesday with offshore flow. Additional disturbances will
increase rain chances again on Thursday and on Friday. By
Saturday, a warm (max temps in the lower to mid 70s), moist and
unstable airmass will be in place again as the main upper level
trough approaches. This will result in another good chance of
showers and thunderstorms, especially across well inland areas.

Expect a cold front to move through in the wake of the main upper
level trough on next Saturday night or Sunday and bring an end to
this unsettled weather pattern. 33
marine...

gradient is beginning to tighten up and went ahead and expanded the
sca to include both the bays and gulf waters. Winds seas will
continue to increase overnight. Speeds will further increase
offshore Monday and Monday night with a tight pressure gradient
situated between high pressure to the north and lower pressure over
the yucatan. Increasing fetch of NE ene winds will lead to water
levels becoming 1-2 ft above normal. This, in addition to wave run-
up, should drive observed water levels around 3 ft around times of
high tides Monday night and Tuesday morning. May have some minor
overwash at the typical highway 87 124 intersection on bolivar
that'll need to be monitored.

Otherwise, unsettled wx will continue for much of the week with a
fluctuating coastal trof waves in place. Periods of rain, iso tsra,
sea fog (late Tue thru early wed), etc will prevail and elevated
winds & seas require caution advsy flags for a good portion of the
week. 47

Preliminary point temps pops
College station (cll) 42 60 45 52 43 0 0 50 80 40
houston (iah) 46 63 49 60 50 0 0 50 80 50
galveston (gls) 52 59 55 65 56 10 10 50 70 60

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory until 9 am cst Monday for the following
zones: galveston bay... Matagorda bay.

Small craft advisory until 6 am cst Tuesday 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... 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.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi60 min NNE 12 G 18 57°F 63°F1012.3 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi60 min N 8 G 12 57°F 61°F1012.4 hPa
GRRT2 18 mi60 min N 22 G 25 57°F 63°F1011.7 hPa
NCHT2 - 8770777 - Manchester, TX 19 mi60 min NNE 9.9 G 13 57°F 66°F1012.1 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi60 min NNE 19 G 24 55°F 60°F1011.2 hPa
GTOT2 20 mi60 min NNE 13 G 19 56°F 61°F1011.6 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi60 min NNE 21 G 26 55°F 58°F1011.8 hPa
HIST2 32 mi60 min N 13 G 18 52°F 64°F1012.3 hPa
LUIT2 33 mi54 min NNE 14 G 20 59°F 1011.2 hPa
42035 - GALVESTON 22NM East of Galveston, TX 38 mi52 min N 21 G 25 56°F 62°F4 ft1012.1 hPa55°F
42043 - GA-252 TABS B 40 mi192 min NNE 19 G 25 62°F1009.7 hPa
FCGT2 - 8772447 - USCG Freeport, TX 45 mi54 min NNE 12 G 15 58°F 61°F1011.9 hPa
FPST2 45 mi54 min N 11 G 14 58°F 61°F1011.1 hPa

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi52 minN 610.00 miPartly Cloudy61°F50°F68%1013.2 hPa
Houston, Pearland Regional Airport, TX13 mi49 minNNE 1010.00 miFair57°F48°F72%1012.8 hPa
Houston, Houston Hobby Airport, TX16 mi49 minN 1410.00 miMostly Cloudy57°F43°F60%1013 hPa
Galveston, Scholes Field, TX21 mi50 minN 17 G 2510.00 miOvercast57°F48°F74%1012 hPa
John Dunn Helistop, TX24 mi47 minN 1410.00 miFair57°F42°F59%1012.5 hPa

Wind History from EFD (wind in knots)
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Last 24hrN3NW3Calm--S5S7S9------SW7--N4N5NW8N10N11--NW13N11N12N15
G18
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1 day agoS11SW6SW6SW4S3SW3CalmCalmCalmCalmCalmCalmCalmNE5N5N8N9NE3N6NE5NE4NE4--N5
2 days agoS8----S6S4--S3--S3--S4S3SE3----S10S13S13SW11S13
G21
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Tide / Current Tables for Clear Lake, Harris Co. Park, Texas (2)
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Clear Lake
Click for Map
Sun -- 03:14 AM CST     0.64 feet Low Tide
Sun -- 05:18 AM CST     0.66 feet High Tide
Sun -- 05:18 AM CST     Moonset
Sun -- 06:57 AM CST     Sunrise
Sun -- 02:44 PM CST     -0.55 feet Low Tide
Sun -- 04:10 PM CST     Moonrise
Sun -- 06:10 PM CST     Sunset
Sun -- 10:28 PM CST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.60.60.60.70.70.60.50.40.2-0-0.3-0.4-0.5-0.5-0.5-0.3-00.20.50.70.70.8

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sun -- 05:16 AM CST     Moonset
Sun -- 06:56 AM CST     Sunrise
Sun -- 07:12 AM CST     -2.48 knots Max Ebb
Sun -- 11:53 AM CST     0.00 knots Slack
Sun -- 03:22 PM CST     2.38 knots Max Flood
Sun -- 04:09 PM CST     Moonrise
Sun -- 06:09 PM CST     Sunset
Sun -- 10:56 PM CST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.5-0.6-1-1.5-1.9-2.3-2.5-2.4-2.1-1.6-0.90.11.222.42.321.61.20.90.60.3-0

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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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.