Sunday, November19, 2017 L-36.com


Marine Weather and Tides
Port Lavaca, TX

Version 3.4
What's New / NOTES
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.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:53AMSunset 5:33PM Sunday November 19, 2017 6:02 AM CST (12:02 UTC) Moonrise 7:45AMMoonset 6:44PM Illumination 1% Phase: New Moon; Moon at 1 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-galveston Bay- 313 Am Cst Sun Nov 19 2017
.low water advisory in effect until 6 pm cst this evening...
.small craft advisory in effect until noon cst today...
Today..North winds 15 to 25 knots decreasing to 10 to 15 knots in the afternoon. Bay waters rough this morning becoming choppy in the afternoon.
Tonight..Northeast winds 5 to 10 knots. Bay waters smooth.
Monday..East winds around 10 knots becoming southeast in the afternoon. Bay waters smooth to slightly choppy becoming smooth in the afternoon.
Monday night..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers after midnight.
Tuesday..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers.
Tuesday night..Northeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Wednesday..North winds 10 to 15 knots. Bay waters slightly choppy.
Wednesday night..North winds 10 to 15 knots. Bay waters slightly choppy.
Thursday..North winds 5 to 10 knots. Bay waters smooth.
Thursday night..North winds 5 to 10 knots becoming northeast after midnight. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 313 Am Cst Sun Nov 19 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Strong offshore winds will continue this morning with frequent gale force gusts and elevated seas. Winds and seas will diminish this afternoon and evening. Easterly to southeast winds should resume Monday and Tuesday as high pressure moves off to the east. The next cold front will push off the coast Tuesday night or early Wednesday morning.

7 Day Forecast for Marine Location Near Port Lavaca, TX
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location: 28.64, -96.6     debug


Area Discussion for - Corpus Christi, TX
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Fxus64 kcrp 191118
afdcrp
area forecast discussion
national weather service corpus christi tx
518 am cst Sun nov 19 2017

Discussion
See aviation discussion below for the 12z tafs.

Aviation
Vfr conditions expected through the TAF period. High cirrus clouds
are expected. Sfc winds will diminish through the day. Winds will veer
from the north and northeast today to northeast and east tonight
and southeast by Monday afternoon.

Previous discussion issued 431 am cst Sun nov 19 2017
short term (today through Monday)...

strong northerly winds across portions of the CWA this morning are
expected to diminish through the day. Models are showing moisture in
the upper levels today, thus am expecting some cirrus which could
help keep mx temps from reaching the 70s. Winds will become light
tonight and begin to veer to the east by Mon morning and southeast
by Mon afternoon. The onshore flow will usher slightly warmer temps
increasing moisture back across S tx on mon. The upper level jet on
the back side of a trough progged to move across tx on Mon will be
in a favorable position by Mon afternoon for upper level support of
a few -shras. Have gone with a 20 pop over the coastal waters where
the moisture is deeper and low level convergence will be strongest
on mon.

As winds across the waters become more northeasterly today, tide
levels may increase to near 1 foot above predicted. This will lead
to tides around 1.7-1.8 feet above msl. Therefore, could see brief
wave run up to the dunes at the time of high tide this afternoon,
but should remain below advisory levels. However, if tides are
slightly higher than anticipated, then a coastal flood advisory may
be needed.

Marine... Gale warning will remain in effect across the coastal
waters this morning until 9 am. Winds should diminish below gale
conditions by then, but will remain at advisory levels. Have gone
with a SCA for the bays and nearshore waters until noon and until 6
pm for the offshore waters.

Fire weather... The strong northerly winds this morning will
diminish through the day as humidity values also decrease. By the
time the humidity values drop to 20-30 percent this afternoon, the
20ft winds will be much lower, therefore no fire weather concerns
are expected at this time.

Long term (Monday night through Saturday)...

the GFS ensemble mean depicts a weak coastal trough (in response to
an earlier shortwave) along with near normal pwat values over the
msa. Anticipate isolated shower activity over the msa Monday night.

The GFS emcwf deterministic predict another upper disturbance to
move across the CWA msa Tuesday night Wednesday along with a
corresponding surge of greater mslp. The combination of the
foregoing surge upper disturbance may result in isolated shower
activity over the msa Tuesday night. SCA conditions may develop at
least over the offshore coastal waters Wednesday. The deterministic
and ensemble output suggest an upper pattern characterized by a
trough over the ern CONUS and a ridge over the wrn CONUS Wednesday
through Saturday, suggestive of subsidence dry conditions over the
cwa msa.

Preliminary point temps pops
Corpus christi 68 48 72 57 79 0 0 10 10 10
victoria 67 42 70 54 77 0 0 10 10 10
laredo 68 48 72 53 78 0 0 10 10 0
alice 69 46 73 53 81 0 0 10 10 10
rockport 66 50 70 60 76 0 0 10 10 10
cotulla 67 44 70 50 78 0 0 10 10 0
kingsville 69 47 73 55 81 0 10 10 10 10
navy corpus 67 55 71 62 77 0 0 10 10 10

Crp watches warnings advisories
Tx... None.

Gm... Small craft advisory from 9 am this morning to 6 pm cst this
evening for the following zones: waters from baffin bay to
port aransas from 20 to 60 nm... Waters from port aransas to
matagorda ship channel from 20 to 60 nm.

Gale warning until 9 am cst this morning for the following
zones: coastal waters from baffin bay to port aransas out
20 nm... Coastal waters from port aransas to matagorda ship
channel out 20 nm... Waters from baffin bay to port aransas
from 20 to 60 nm... Waters from port aransas to matagorda
ship channel from 20 to 60 nm.

Small craft advisory until noon cst today for the following
zones: bays and waterways from baffin bay to port aransas...

bays and waterways from port aransas to port o'connor.

Small craft advisory from 9 am this morning to noon cst today
for the following zones: coastal waters from baffin bay to
port aransas out 20 nm... Coastal waters from port aransas
to matagorda ship channel out 20 nm.

Te 81... Aviation


Weather Reporting Stations
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Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX19 mi69 minN 1110.00 miFair48°F39°F71%1024.3 hPa
Victoria, Victoria Regional Airport, TX23 mi71 minN 710.00 miFair47°F37°F69%1025.1 hPa

Wind History from PKV (wind in knots)
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Last 24hr----SW4SW11SW20
G25
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1 day ago----S6S10----S15
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2 days agoCalmE3E4SE7E6SE9SE9E10SE5SE6S7SE7E5SE4SE6SE5S6SE5SE5S5S5------

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Sun -- 12:25 AM CST     1.00 feet High Tide
Sun -- 06:52 AM CST     Sunrise
Sun -- 07:44 AM CST     Moonrise
Sun -- 02:16 PM CST     0.02 feet Low Tide
Sun -- 05:30 PM CST     Sunset
Sun -- 06:44 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1110.90.90.80.70.60.50.40.30.20.10000.10.20.30.40.60.70.80.9

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Sun -- 04:13 AM CST     0.36 feet High Tide
Sun -- 05:29 AM CST     0.36 feet Low Tide
Sun -- 06:52 AM CST     Sunrise
Sun -- 06:59 AM CST     0.36 feet High Tide
Sun -- 07:44 AM CST     Moonrise
Sun -- 05:31 PM CST     Sunset
Sun -- 06:45 PM CST     Moonset
Sun -- 06:57 PM CST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.30.40.40.40.40.40.40.40.30.30.30.30.30.30.30.20.20.20.20.20.30.3

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Corpus Christi, TX (7,2,3,4)
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Ground Weather Radar Station Corpus Christi, TX
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weather_mapweather_map weather_map

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.