Sunday, September24, 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 7:16AMSunset 7:22PM Sunday September 24, 2017 7:20 AM CDT (12:20 UTC) Moonrise 10:15AMMoonset 9:30PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 554 Am Cdt Sun Sep 24 2017
Today..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Tonight..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Monday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Tuesday night..East winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms.
Wednesday..East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Wednesday night..East winds 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A slight chance of showers and Thunderstorms.
Thursday..East winds around 10 knots. Bay waters smooth to slightly choppy. A slight chance of showers and Thunderstorms.
Thursday night..East winds around 10 knots becoming northeast after midnight. Bay waters smooth to slightly choppy becoming slightly choppy 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 554 Am Cdt Sun Sep 24 2017
Synopsis for high island to matagorda ship channel out 60 nm.. A light to moderate onshore flow with 2 to 3 foot seas should prevail into the mid-week. Tides are running slightly above normal with the onshore flow, but should not be high enough for any critical impacts to be expected. Isolated showers and Thunderstorms can be expected daily, especially in the pre-dawn hours. A cold front will move offshore late next week, increasing winds and building seas.

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 241141
afdcrp
area forecast discussion
national weather service corpus christi tx
641 am cdt Sun sep 24 2017

Discussion
See aviation below for 12z TAF update.

Aviation
Patchy fog has been developing at and around vct and ali early
this morning. Anticipate visibilities to improve as fog clears
within the next couple hours after daybreak. MVFR cloud deck may
briefly form over ali and lrd early this morning, but should clear
the area by the mid to late morning.VFR will then prevail at all
area terminals. Isolated streamer showers are moving within the
vicinity of crp and vct early this morning. Anticipate more
scattered convection to develop and move onshore later this
morning into the afternoon. Weak to moderate southeast winds will
develop through the afternoon, relaxing this later this evening.

Previous discussion issued 435 am cdt Sun sep 24 2017
short term (today through Monday)...

the region remains positioned between a deep upper level trough
over the rockies and a weak cutoff low over the northern gulf
coast. This cutoff low will continue retrograding to the west as
the deeper trough progresses further east through the period.

Anticipate isolated streamer showers to continue through the early
morning, with more scattered sea breeze convection developing
during the afternoon. Moisture will increase overnight and more so
on Monday, with pwat values climbing back over 2 inches across
most inland areas, but especially across the western zones.

After a repeat of streamer showers and storms overnight, chances
for showers and thunderstorms will increase through the day on
Monday.

Temperatures today will be similar to yesterday, with highs near
90 degrees along the coast to the mid upper 90s across the rio
grande plains. Highs tomorrow will be a few degrees cooler across
the west where higher cloud cover and more rainfall is expected
throughout the day.

Long term (Tuesday through Saturday)...

main upper trough will eject into the northern plains at the start
of the extended. However, some energy hangs back to the west over
the SW CONUS and four corners region with a closed low developing
Tuesday night into Wednesday morning. Deeper moisture will exist
over south texas with pw values at or slightly above 2 inches
Tuesday persisting into at least Thursday. Areas along the western
brush country and rio grande will be the favored locations for
showers and storms these days due to closer proximity of better
dynamics. Will keep pops in the 50 to 60 percent range for these
areas, but may need to bump pops up in later forecasts. The threat
for moderate to heavy rain could evolve over the western zones, but
at this time confidence is higher of heavy rains northwest of the
forecast area. Model trends will need to be monitored for the
potential to add mdt heavy rain to the forecast, ESP for Tuesday and
Wednesday. For the coastal bend into the victoria crossroads, decent
rain chances will still exist during the week, considering moisture
may pool along a southward moving frontal boundary. Daytime heating
and the sea breeze may also be sufficient enough to generate
convection as well. The front may actually make it through the area
in the Thursday to Friday time frame. Rain chances will then
diminish from northeast to southwest Friday night into Saturday as
drier air filters into south texas.

Regarding temperatures, highs will be around normal Tuesday through
Thursday. Evolution of the showers and storms could end complicating
the temperature forecast though. By late in the forecast, highs will
be setback into the lower to mid 80s behind the boundary.

Preliminary point temps pops
Corpus christi 90 76 90 76 89 30 20 30 20 40
victoria 89 73 90 74 89 30 10 30 20 40
laredo 97 77 94 78 94 20 10 40 40 60
alice 93 73 92 74 92 30 10 40 20 40
rockport 90 78 89 79 88 30 20 30 20 40
cotulla 96 75 94 76 93 20 20 40 50 60
kingsville 92 74 92 76 92 30 20 30 20 40
navy corpus 90 79 89 80 88 30 20 30 20 40

Crp watches warnings advisories
Tx... None.

Gm... None.

Xx 99... Short term


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 0 mi50 min SE 12 G 15 82°F 83°F1010.1 hPa
SDRT2 - 8773037 - Seadrift, TX 17 mi50 min E 4.1 G 6 80°F 83°F1010.3 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi50 min SE 13 G 16 82°F 83°F1009.8 hPa
MBET2 21 mi50 min SSE 16 G 17 82°F 84°F1008.9 hPa
AWRT2 30 mi50 min SE 7 G 11 82°F 84°F1010 hPa
EMAT2 37 mi50 min E 8.9 G 14 82°F 84°F1009.9 hPa
CPNT2 43 mi50 min SE 9.9 G 11 82°F 83°F

Wind History for Port OConnor, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX4 mi45 minESE 610.00 miFair77°F72°F85%1010.5 hPa
Palacios Municipal Airport, TX19 mi27 minE 510.00 miFair75°F73°F96%1010.5 hPa
Victoria, Victoria Regional Airport, TX23 mi29 minENE 54.00 miFog/Mist74°F72°F94%1010.5 hPa

Wind History from PKV (wind in knots)
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Last 24hr--CalmE5E8S7E10
G15
SE6E14SE16
G19
E13----------SE12----------SE5SE6SE6
1 day ago--SE5SE3E10E9SE11SE12
G17
E12--SE11----------------------------
2 days ago--SE3S7S8----S11
G18
--S8SE14----------------------------

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Sun -- 03:00 AM CDT     1.00 feet High Tide
Sun -- 07:15 AM CDT     Sunrise
Sun -- 11:14 AM CDT     Moonrise
Sun -- 05:26 PM CDT     0.43 feet Low Tide
Sun -- 07:20 PM CDT     Sunset
Sun -- 10:30 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.9111110.90.90.90.80.80.70.70.60.50.50.50.40.40.50.50.60.70.8

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Sun -- 03:23 AM CDT     0.43 feet High Tide
Sun -- 07:16 AM CDT     Sunrise
Sun -- 08:31 AM CDT     0.38 feet Low Tide
Sun -- 11:14 AM CDT     Moonrise
Sun -- 02:29 PM CDT     0.46 feet High Tide
Sun -- 07:20 PM CDT     Sunset
Sun -- 09:33 PM CDT     0.33 feet Low Tide
Sun -- 10:31 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.50.50.40.40.40.40.30.30.30.3

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 (8,2,3,4)
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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.