Sunday, July5, 2020
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Marine Weather and Tides
Clear Lake Shores, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:24AMSunset 8:25PM Sunday July 5, 2020 9:52 PM CDT (02:52 UTC) Moonrise 8:11PMMoonset 5:43AM Illumination 100% Phase: Full Moon; Moon at 15 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- 305 Pm Cdt Sun Jul 5 2020
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms after midnight. A chance of showers and Thunderstorms late.
Monday..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A chance of showers and Thunderstorms early in the morning, then a slight chance of showers and Thunderstorms in the late morning and afternoon.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy. Isolated showers and Thunderstorms early in the evening. Isolated showers after midnight.
Tuesday..South winds 5 to 10 knots. Bay waters smooth. Isolated Thunderstorms early in the morning. Scattered showers. Scattered Thunderstorms in the late morning and afternoon.
Tuesday night..South winds around 10 knots. Bay waters smooth to slightly choppy.
Wednesday..South winds 10 to 15 knots. Bay waters slightly choppy. Scattered showers and Thunderstorms in the morning, then isolated showers and Thunderstorms in the afternoon.
Wednesday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Thursday..South winds 10 to 15 knots. Bay waters slightly choppy. Isolated showers and Thunderstorms in the afternoon.
Thursday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..South winds 10 to 15 knots becoming southwest after midnight. Bay waters slightly choppy becoming smooth to slightly choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 305 Pm Cdt Sun Jul 5 2020
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore winds will continue through mid-week as high pressure remains in place over the eastern gulf. Scattered to isolated showers and Thunderstorms will be possible over the next several days, although precipitation should neither be prolonged nor heavy.


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 052346 AFDHGX

Area Forecast Discussion National Weather Service Houston/Galveston TX 646 PM CDT Sun Jul 5 2020

AVIATION [00Z TAF Issuance].

VFR conditions in the flying areas overnight and into the morning. Beginning at 06z over night, some showers are expected to effect the UTS/CXO area then later develop into thunderstorm activity around 18Z, but dissipate by around 23z. At IAH, showers are expected at 18z, followed by thunderstorms at around 22z and end at around 01z tomorrow night. HOU is the furthest south the showers are expected to reach at around 21z and should be ending just outside the TAF time. 35


SHORT TERM [Tonight and Tomorrow/Monday].

Satellite imagery still shows a pool of 2.00 inch PW air over much of East and Southeast Texas. A series of weak upper level disturbances will move from NW to the SE over the next 24 to 36 hours and bring SE TX a chance for showers and thunderstorms. Timing and exact placement of these disturbance is always tricky but a consensus of models brings one such disturbance across the extreme eastern edge of the CWA between 06-09z and another one Monday morning between 15-18z. The best chance for rain should be in the deeper moisture or roughly east of a Madisonville to Cleveland line. Fcst soundings show mid level clouds developing overnight so went a bit warmer than the past couple of nights for MinT. 850 temps cool a bit on Monday so MaxT should be a few degrees cooler than today. Convective temps also lower to around 92 degrees so would expect a bit more activity in the afternoon with heating. Will keep PoPs in the chance category but coverage should be noticeably higher than today. 43

LONG TERM [Tomorrow Night through Sunday].

Will be keeping with the generally wetter forecast tomorrow night through Weds as the upper low/trof near the Lower MS River Valley and deep Gulf moisture remain the main features with this overall weather pattern. The bulk of the activity should be diurnal, dev- eloping along the seabreeze during the afternoon. Shower/thunder- storm coverage will be better east of I-45 as the higher PWs (2.1 to 2.4 inches) move in from that direction. However, we could see enhanced development over SE TX should any of the disturbances in the NW flow aloft make its way down into the area. And at present models are indicating such a scenario for Tues.

As the main upper low/trof to our east begins to weaken and lifts out to the NE around mid week, heights aloft will be rising. Will keep 30 to 40% POPs in for Weds as the elevated PWs linger just a bit longer . but rain chances should drop off to isolated/nil for Thur and Fri as the upper ridge takes hold over the region. There are a few hints in the extended guidance that indicate perhaps we could see a slight increase in POPs for next weekend as the deep- ening upper trof over the eastern U.S. tries to build back to the SW. This may allow for a slug of slightly deeper moisture to move back toward the FA from the east at that time. But given the time of year, odds are likely in favor of the ridge. 41

MARINE.

With surface high pressure remaining in place over the eastern Gulf, expect light to occasionally moderate onshore winds to continue over the next several days. The pressure gradient will tighten tonight and a SCEC is in effect for Matagorda bay and the Gulf waters. The gradient relaxes somewhat Monday morning with a persistent light to moderate onshore flow. 43

PRELIMINARY POINT TEMPS/POPS.

College Station (CLL) 77 94 78 94 76 / 20 30 20 40 20 Houston (IAH) 79 94 80 92 79 / 30 30 20 60 10 Galveston (GLS) 82 92 82 91 82 / 30 30 20 50 10

HGX WATCHES/WARNINGS/ADVISORIES.

TX . None. GM . SMALL CRAFT SHOULD EXERCISE CAUTION until 5 AM CDT Monday 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.



AVIATION . 35


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi59 min SSW 12 G 18 84°F 89°F1009.4 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi59 min SSW 7 G 12 85°F 87°F1009.6 hPa
GRRT2 18 mi59 min SW 12 G 14 83°F 88°F1009.4 hPa
NCHT2 - 8770777 - Manchester, TX 19 mi59 min SSW 8 G 11 86°F 87°F1009.1 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi59 min SSW 14 G 17 86°F 86°F1009 hPa
GTOT2 20 mi59 min SSW 5.1 G 12 84°F 87°F1009.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi59 min SW 5.1 G 9.9 86°F1010.1 hPa
HIST2 32 mi59 min SSW 6 G 11 83°F 89°F1009.7 hPa
LUIT2 33 mi59 min SSW 8.9 G 13 83°F 85°F1011.3 hPa
42035 - GALVESTON 22NM East of Galveston, TX 38 mi43 min SSW 16 G 18 84°F 85°F1009.7 hPa80°F
FPST2 45 mi59 min S 9.9 G 12 84°F 89°F1009.2 hPa

Wind History for Eagle Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi63 minS 1010.00 miMostly Cloudy84°F71°F66%1009.5 hPa
Houston, Pearland Regional Airport, TX13 mi60 minSSW 610.00 miFair85°F73°F68%1010.3 hPa
Houston, Houston Hobby Airport, TX16 mi60 minSSW 1010.00 miMostly Cloudy86°F73°F67%1009.9 hPa
Galveston, Scholes Field, TX21 mi61 minSSW 1110.00 miFair85°F78°F80%1010.1 hPa
John Dunn Helistop, TX24 mi58 minSSW 7 G 1810.00 miFair84°F75°F74%1009.5 hPa

Link to 5 minute data for KEFD

Wind History from EFD (wind in knots)
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1 day agoSE3CalmCalmCalmCalmCalmCalmCalmCalmW4--W9W9SW10NW4W5SE4--S6S5SW4S11S9S10
2 days agoS8S6S6S6S5S4SW5SW6SW3NW3--SW10W8W8NW8SW5--W8SW3W6CalmNE11E11
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Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
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Clear Lake
Click for Map
Sun -- 05:05 AM CDT     -0.63 feet Low Tide
Sun -- 06:25 AM CDT     Sunrise
Sun -- 06:42 AM CDT     Moonset
Sun -- 01:58 PM CDT     0.82 feet High Tide
Sun -- 07:15 PM CDT     0.66 feet Low Tide
Sun -- 08:24 PM CDT     Sunset
Sun -- 08:57 PM CDT     0.67 feet High Tide
Sun -- 09:11 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20-0.2-0.4-0.6-0.6-0.6-0.4-0.20.10.30.60.70.80.80.80.80.70.70.70.70.70.60.6

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Sun -- 02:08 AM CDT     0.00 knots Slack
Sun -- 05:43 AM CDT     2.33 knots Max Flood
Sun -- 06:25 AM CDT     Sunrise
Sun -- 06:41 AM CDT     Moonset
Sun -- 01:23 PM CDT     -0.00 knots Slack
Sun -- 08:22 PM CDT     Sunset
Sun -- 09:09 PM CDT     Moonrise
Sun -- 09:59 PM CDT     -2.46 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.7-1-0.10.91.72.22.32.11.71.41.20.90.50.1-0.2-0.4-0.5-0.7-1.1-1.5-2-2.3-2.5-2.4

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (22,6,7,8)
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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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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 numerous 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.