Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Bay City, 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 7:25AMSunset 7:36PM Thursday March 21, 2019 10:33 AM CDT (15:33 UTC) Moonrise 7:33PMMoonset 7:06AM 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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GMZ330 Matagorda Bay- 1016 Am Cdt Thu Mar 21 2019
Rest of today..Northeast winds around 5 knots becoming southeast in the afternoon. Bay waters smooth.
Tonight..Southeast winds 5 to 10 knots. Bay waters smooth.
Friday..Southeast winds 5 to 10 knots. Bay waters smooth.
Friday night..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers after midnight.
Saturday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. Scattered showers and Thunderstorms.
Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms in the afternoon.
Sunday night..South winds 5 to 10 knots. Bay waters smooth.
Monday..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Monday night..South winds around 5 knots becoming southeast after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1016 Am Cdt Thu Mar 21 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Weak high pressure will build into southeast texas today bringing light and variable winds. Onshore winds will return tonight as the area of high pressure moves east. The winds should gradually increase Friday night and Saturday. Winds relax Monday before a cold front moves through early Tuesday.


7 Day Forecast for Marine Location Near Bay City, TX
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location: 28.95, -95.94     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 211516
afdhgx
area forecast discussion
national weather service houston galveston tx
1016 am cdt Thu mar 21 2019

Update
High pressure anchored across the region is producing very weak
near surface winds under clear skies. This should allow for
efficient warming into the average middle 70s, with some spots
warming to near 80 f, across southeast texas today. Drier air
aloft will mix down this afternoon and drive mid to late day
humidities into the 30(%)s, possibly a few hours where further
inland humidities bottom out in the mid to upper 20(%)s. Clear
overnight skies and weak winds will have many interior locales
falling to around 50 f by sunrise. Another warm and mostly sunny
day in the areawide middle to upper 70s tomorrow afternoon.

Onshore flow returns that will commence the moisture pump going
into the weekend. A developing rocky lee low mid-upper trough on
Saturday will strengthen onshore winds and increase westerly-
northwesterly pops to low end chances for primarily showers with
isolated thunderstorms. 31

Prev discussion issued 508 am cdt Thu mar 21 2019
discussion...

per obs, the latest cold front looks to be just off the coast this
morning. Weak CAA noted in the wake of this boundary thus far, but
the slightly lower dewpoints filtering into the region will likely
have impacts with fire weather concerns this afternoon. Otherwise,
this mild dry weather will prevail another day or so as high pres-
sure remains the in charge.

With the surface high moving further east by tomorrow... The return
of onshore winds will also herald the return of low-level moisture
and warmer temperatures. This SE flow will be strengthening during
the evening overnight (fri night into Sat morning) as the next up-
per trof moves into the southern plains and deepens. While progged
pws are not terribly impressive (1.0-1.3"), there should be enough
to interact with any short-waves (moving in just ahead of the main
system) on Sat to produce isolated scattered activity. The highest
pops will likely range from north to south (given the proximity of
the upper low as it lift out to the ne). Will maintain some lowish
pops for Sun as the onshore flow slightly elevated pws remain over
the area. Daytime heating seabreeze should be the main triggers.

These latest (00z) runs are not quite as aggressive with this next
cold front on mon... But are still indicating FROPA late Mon after-
noon. Rain chances look much lower with its passage, perhaps owing
to the pronounced W SW low-level flow ahead of it early mon. Drier
and slightly cooler weather expected in its wake for tues weds. 41
marine...

cold front moving through the coastal waters and winds should
increase a little this morning becoming more northeasterly with time
today. A seabreeze will likely develop and alter winds locally along
the icw and bays. Southeasterly flow developing Friday strengthening
into Saturday. Gradual moistening through the weekend and could see
an isolated shower or thunderstorm Saturday around matagorda bay
(less likely for the nearshore waters and galveston bay areas) with
rain chances lingering Sunday through Tuesday morning. A stronger
cold front swings through early Tuesday.

45
aviation...

vfr for the area with a narrow scattered mid level deck around 6000-
7000ft shifting southward this morning. Patchy fog around byy lbx
areas this morning should mix out as the north and northeasterly
winds pick up slightly by 13z. Most of the area terminals will see
west or northwest winds becoming northeasterly with time. Weak
seabreeze developing this afternoon to impact gls lbx. Cirrus on the
increase tomorrow morning. Again may see some fog around lbx byy
areas Friday morning.

45

Preliminary point temps pops
College station (cll) 77 51 77 55 74 0 0 0 20 50
houston (iah) 76 49 79 55 75 0 0 0 10 30
galveston (gls) 70 60 72 61 72 0 0 0 10 20

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 31


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EMAT2 17 mi45 min ENE 8.9 G 9.9 61°F 63°F1024.3 hPa
SGNT2 21 mi45 min ENE 7 G 9.9 62°F1024.4 hPa
FCGT2 - 8772447 - USCG Freeport, TX 34 mi45 min E 6 G 8.9 63°F 62°F1025.2 hPa
FPST2 34 mi45 min NE 8.9 G 11 62°F 63°F1024.3 hPa
VCAT2 41 mi45 min E 8.9 G 11 62°F 63°F1024.7 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 42 mi51 min ENE 11 G 12 60°F 62°F1024.4 hPa
LUIT2 44 mi45 min ENE 7 G 8.9 61°F 1024.6 hPa
KBQX 47 mi38 min E 9.9 64°F 54°F

Wind History for USCG Freeport, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay City, Bay City Municipal Airport, TX4 mi58 minE 410.00 miFair61°F53°F78%1025.1 hPa
Palacios Municipal Airport, TX23 mi40 minE 910.00 miFair65°F55°F70%1024.8 hPa
Wharton, Wharton Regional Airport, TX24 mi58 minE 310.00 miFair61°F50°F68%1025.4 hPa

Wind History from BYY (wind in knots)
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Last 24hrNE5CalmSE3CalmCalmSE8S9S8S5CalmCalmCalmCalmCalmNW5CalmCalmCalmCalmCalmNE3CalmE4E5
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E10E8E5CalmE4CalmNE3CalmCalmCalmCalmE3CalmNE4NE4NE4NE7
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E12E10E7E5NE3NE5NE3NE5NE5NE5NE4NE4NE4CalmN3CalmE9E9

Tide / Current Tables for Freeport Harbor, Texas
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Freeport Harbor
Click for Map
Thu -- 04:05 AM CDT     1.45 feet High Tide
Thu -- 07:24 AM CDT     Sunrise
Thu -- 08:03 AM CDT     Moonset
Thu -- 10:27 AM CDT     -0.18 feet Low Tide
Thu -- 04:56 PM CDT     1.16 feet High Tide
Thu -- 07:33 PM CDT     Sunset
Thu -- 08:30 PM CDT     Moonrise
Thu -- 10:29 PM CDT     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.91.11.41.51.41.10.70.3-0-0.2-0.2-00.20.50.91.11.21.10.80.50.200

Tide / Current Tables for Freeport Harbor, Texas (2)
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Freeport Harbor
Click for Map
Thu -- 04:09 AM CDT     1.74 feet High Tide
Thu -- 07:24 AM CDT     Sunrise
Thu -- 08:03 AM CDT     Moonset
Thu -- 10:24 AM CDT     0.07 feet Low Tide
Thu -- 05:01 PM CDT     1.44 feet High Tide
Thu -- 07:33 PM CDT     Sunset
Thu -- 08:30 PM CDT     Moonrise
Thu -- 10:26 PM CDT     0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.11.41.61.71.71.410.60.30.10.10.20.50.81.11.41.41.31.10.70.50.30.3

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 (11,2,3,4)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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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.