Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Port Lavaca, TX

Version 3.4
NOTICE
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:40AMSunset 8:28PM Thursday July 18, 2019 12:07 PM CDT (17:07 UTC) Moonrise 8:57PMMoonset 7:07AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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- 1011 Am Cdt Thu Jul 18 2019
Rest of today..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and isolated Thunderstorms.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Sunday night..South winds 5 to 10 knots. Bay waters smooth.
Monday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday night..South winds around 10 knots becoming 5 to 10 knots after midnight. Bay waters smooth to slightly choppy becoming smooth after midnight. 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 1011 Am Cdt Thu Jul 18 2019
Synopsis for high island to matagorda ship channel out 60 nm.. High pressure over the gulf and lower pressure in the lee of the rockies will maintain a typical summertime pattern with moderate onshore winds.


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 181130
afdcrp
area forecast discussion
national weather service corpus christi tx
630 am cdt Thu jul 18 2019

Discussion
Note aviation discussion below corresponding to the 12z tafs.

Aviation
A mixture of MVFR andVFR conditions early this morning will
transition to predominateVFR by afternoon. MVFR conditions will
develop after 06z Friday. Weak onshore flow early this morning
will become moderate breezy this afternoon early evening. Weak
s SE wind near the end of the TAF period.

Prev discussion issued 423 am cdt Thu jul 18 2019
short term (today through Friday)...

no change to the semi-permanent upper pattern (ridge over the srn
conus with disturbances moving around the NRN periphery of the
ridge) during the period (gfs ECMWF nam deterministic output). Nam
and GFS deterministic runs maintain pwat values below normal
during the period. No significant pcpn expected. Expect maximum
heat index values in the 105-109f range with isolated amounts
around 110f over SRN sections.

Long term (Friday night through Wednesday)...

the 500mb sub-tropical ridge will remain in place through Saturday
before starting to break down and shift northwest late this weekend.

Above normal temperatures and generally dry conditions are expected
through the weekend as limited moisture and subsidence continues.

However, can not rule out an isolated shower or thunderstorm with
the afternoon sea breeze. Breezy conditions will be possible
Saturday afternoon as broad high pressure across the gulf of mexico
and lower pressure upstream persist. The latest GFS and ecmwf
continue to suggest a weak cold front will move south into central
texas early next week before stalling across south texas by mid to
late week. There remains some uncertainty on how far south this
frontal boundary will make it. However, rain chances should begin to
increase across the CWA by early next week. Southeast winds are
expected to shift to the east with slightly cooler temperatures
on Tuesday and Wednesday.

Marine...

anticipate small craft exercise caution conditions over the srn
bays nearshore coastal waters this afternoon owing to the expected
thermal mslp gradient. Application of local expert system
suggests a moderate risk of rip currents today Friday. Small craft
exercise caution conditions are possible Friday night into
Saturday, mainly for the southern waters. Otherwise, weak to
moderate onshore flow will prevail with seas 2 to 4 feet. Isolated
to scattered thunderstorms over the waters Sunday through
Tuesday.

Preliminary point temps pops
Corpus christi 95 79 94 79 95 10 10 10 0 10
victoria 95 77 94 76 95 10 10 10 0 10
laredo 105 78 104 77 104 0 0 0 0 0
alice 100 77 99 76 99 10 0 0 0 0
rockport 90 82 90 81 90 10 10 10 0 10
cotulla 104 77 104 76 103 0 0 0 0 0
kingsville 98 77 96 77 97 10 0 0 0 0
navy corpus 90 82 90 82 90 10 10 10 0 10

Crp watches warnings advisories
Tx... None.

Gm... None.

Wc 87... Aviation


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 0 mi55 min S 9.9 G 12 86°F 86°F1016.7 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi55 min SSE 13 G 15 84°F 85°F1016.4 hPa
SDRT2 - 8773037 - Seadrift, TX 17 mi55 min SSE 9.9 G 13 87°F 85°F1016.9 hPa
MBET2 21 mi55 min S 12 G 13 85°F 1015.8 hPa
AWRT2 30 mi61 min SSE 9.9 G 13 86°F 85°F1016.8 hPa
EMAT2 37 mi61 min SSE 8.9 G 12 86°F 87°F1016.8 hPa
RCPT2 - 8774770 - Rockport, TX 49 mi55 min 86°F 1016.7 hPa

Wind History for Port OConnor, TX
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SW11
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G15
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX4 mi72 minS 910.00 miPartly Cloudy90°F77°F67%1016.9 hPa
Palacios Municipal Airport, TX19 mi74 minS 1010.00 miFair90°F75°F62%1016.8 hPa
Victoria, Victoria Regional Airport, TX23 mi76 minSSE 1110.00 miFair92°F73°F54%1016.4 hPa

Wind History from PKV (wind in knots)
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Last 24hrSE12S12SE12
G20
S12
G17
SE13S12
G17
S10
G17
SE11
G14
S10SE5SE6SE5S6SE6S5S5S4S3SE3S3S5S10S8S7
G15
1 day agoS12
G18
SE13
G18
S15S11
G19
SE13
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S11S8S6SE4SE4SE5SE4SE5SE5S5S4CalmE3SE3S5S11
G16
S10S10
G15
2 days agoS9S9
G14
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G18
S10
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G15
S13
G17
S11
G16
S11
G16
S8S6S3S5S6S3S4CalmCalmS4SE4SE4S7S10
G14
S10
G14
S11
G15

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
GOES 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 Corpus Christi, TX (13,3,4,5)
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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.