Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Port Lavaca, TX

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:19AMSunset 7:45PM Tuesday March 28, 2017 6:32 PM CDT (23:32 UTC) Moonrise 6:53AMMoonset 7:34PM Illumination 2% Phase: Waxing Crescent; 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- 346 Pm Cdt Tue Mar 28 2017
.small craft should exercise caution...
Tonight..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and Thunderstorms after midnight.
Wednesday..South winds 15 to 20 knots. Bay waters choppy. Showers likely and isolated Thunderstorms. Some Thunderstorms may be severe with heavy rainfall.
Wednesday night..South winds 10 to 15 knots becoming southwest after midnight. Bay waters slightly choppy. Showers likely and isolated Thunderstorms in the evening, then a chance of showers and Thunderstorms after midnight. Some Thunderstorms may be severe with heavy rainfall in the evening.
Thursday..Northwest winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Thursday night..Northwest winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
Friday..South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Sunday..Southeast winds 10 to 15 knots becoming south 15 to 20 knots in the afternoon. Bay waters slightly choppy becoming choppy in the afternoon. Showers and Thunderstorms likely.
Sunday night..South winds 10 to 15 knots becoming southwest 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight. A chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 346 Pm Cdt Tue Mar 28 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Southeast winds will increase tonight across the upper texas coastal waters. Seas will continue to gradually build this afternoon and tonight. Winds and seas should decrease late Wednesday into Thursday as a pacific cold front pushes off the coast on Thursday. Offshore winds are expected Thursday into Friday but southerly winds develop again for the weekend strenthening late Saturday and Sunday.

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 282108
afdcrp
area forecast discussion
national weather service corpus christi tx
408 pm cdt Tue mar 28 2017

Short term (tonight through Wednesday night)
As a deep upper level low approaches the region, a dryline is
expected to push into the western CWA tonight. Convection may
begin to affect the NW CWA after 10 pm, but not expecting any
significant precip until after midnight. As the dryline moves
east, moisture is progged to deepen across the eastern CWA with
pwat's of 1.5-1.6 inches. The atmosphere is progged to be unstable
with ample shear, however CIN values/capping inversion will also
be high overnight. Kept the higher pops across the northern cwa
where the cap is weaker and upper dynamics are better. There
appears to be a brief window after 09z (closer to 12z) through
15z where the atmosphere will be most conducive for convection to
develop. The CAPE is mod to strong and cin/cap decreases across
the eastern CWA coincident with the dryline bdry and an embedded
short wave tracking around the SE periphery of the low. The better
chc of strong to isol svr wx is expected during this time frame
across the NE cwa. Generally, the CWA is expected be at the tail
end of the storm system. As the short wave tracks ne, the
convection will also exit to the east and northeast by mid to late
morning. Models prog drier mid/upper levels as
dryslotting/subsidence overtakes the area through Wed afternoon.

The dryline is progged to stall along the coast Wed afternoon then
retreat west slightly as the sea breeze pushes inland. Wed night,
the upper low will move east across tx and push a weak cold front
through the cwa. Residual low level moisture may be sufficient
for isol (sct over the waters) convection across the east ahead
of and along the frontal bdry Wed night. The cold front will bring
slightly cooler temps to the area Wed night.

Long term (Thursday through Tuesday)
Drier conditions develop behind the exiting front Thursday. Low
afternoon relative humidity values will be in place Thursday/Friday
however winds should remain below fire weather criteria. Moisture
gradually returns on Saturday ahead of the next approaching upper
disturbance. The cap continues to remain strong on Saturday. As a
result, have removed Saturday 20 pops for now due to the cap,
although a few isolated streamer showers may be possible in the
morning hours under the cap. It is not until Saturday night, more so
into Sunday, that pops will increase as the next disturbance digs
down through texas. With slightly more energy and a slightly farther
dip south, chances for rain remain rather high, with likely pops
draped across the northern zones from cotulla to victoria. Model
soundings show profiles developing steep lapse rates aloft which may
contribute to strong activity. Things may change between now and the
weekend but this is the next shot of rain with the possibility of
strong weather. Temperatures will remain rather warm thru the
period, with temperatures even reaching into the low to mid 90s
across the brush country Thursday thru Saturday.

Preliminary point temps/pops
Corpus christi 72 88 62 82 62 / 20 40 20 10 0
victoria 71 85 59 79 56 / 40 70 20 10 0
laredo 68 93 58 85 62 / 30 10 10 0 0
alice 71 90 60 84 59 / 20 30 20 10 0
rockport 72 81 65 80 67 / 20 50 20 10 0
cotulla 65 91 57 84 59 / 50 10 10 0 0
kingsville 72 91 61 84 59 / 20 30 20 10 0
navy corpus 73 82 66 80 67 / 20 40 20 10 0

Crp watches/warnings/advisories
Tx... None.

Gm... Small craft advisory until 10 am cdt Wednesday for the following
zones: bays and waterways from baffin bay to port aransas...

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

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.

Te/81... Short term
cb/85... Long term


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 0 mi44 min SE 22 G 27 76°F 80°F1005.7 hPa
SDRT2 - 8773037 - Seadrift, TX 17 mi44 min ESE 16 G 25 78°F 80°F1005.7 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi44 min SE 20 G 23 1005.6 hPa
MBET2 21 mi44 min SSE 18 G 21 74°F
AWRT2 30 mi44 min SE 18 G 22 1005.4 hPa
EMAT2 37 mi44 min ESE 17 G 23 1006.3 hPa
MAXT2 - Mission-Aransas Reserve, TX 42 mi92 min 12 76°F 1006 hPa (-3.0)72°F
CPNT2 43 mi44 min SE 15 G 19
RCPT2 - 8774770 - Rockport, TX 49 mi44 min SSE 16 G 23 76°F 79°F1004.7 hPa

Wind History for Port OConnor, TX
(wind in knots)    EDIT      (on/off)   Help
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SE11
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G16
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G23
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SE16
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SE14
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S9
G12
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S14
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S15
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G15
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SE9
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SE14
SE16
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G20
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G21
SE17
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SE17
G21
SE17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX4 mi37 minSE 20 G 2510.00 miOvercast and Breezy78°F72°F83%1006.1 hPa
Palacios Municipal Airport, TX19 mi39 minSE 20 G 3010.00 miOvercast and Breezy78°F71°F79%1006.5 hPa
Victoria, Victoria Regional Airport, TX23 mi41 minSE 21 G 2910.00 miMostly Cloudy and Breezy80°F68°F67%1005.7 hPa

Wind History from PKV (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmSE10S11
G16
S11
G14
S10
G14
SE10SE9SE6SE11SE16
G20
SE16
G21
SE17
G25
SE17
G27
SE23
G27
SE20
G29
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G30
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G29
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G26
1 day agoSE17
G21
SE12SE10
G16
SE13SE10S5CalmCalmCalmCalmSE4CalmCalmCalmCalmS7CalmS8
G15
S12
G17
S12S10
G16
S10
G16
CalmS10
2 days agoSE10S8S8S3CalmCalmS7CalmCalmCalmCalmCalmCalmCalmCalmS13S14SE17
G24
SE19
G22
S18
G23
S18
G23
S15
G21
S17
G20
SE16
G21

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Tue -- 03:16 AM CDT     0.51 feet Low Tide
Tue -- 07:20 AM CDT     Sunrise
Tue -- 07:53 AM CDT     Moonrise
Tue -- 09:47 AM CDT     0.83 feet High Tide
Tue -- 04:19 PM CDT     0.57 feet Low Tide
Tue -- 07:42 PM CDT     Sunset
Tue -- 08:33 PM CDT     Moonset
Tue -- 08:49 PM CDT     0.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.50.50.50.60.60.70.80.80.80.80.80.70.70.60.60.60.60.70.70.70.70.6

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Tue -- 06:35 AM CDT     0.25 feet Low Tide
Tue -- 07:21 AM CDT     Sunrise
Tue -- 07:53 AM CDT     Moonrise
Tue -- 04:28 PM CDT     0.38 feet High Tide
Tue -- 06:54 PM CDT     0.37 feet Low Tide
Tue -- 07:42 PM CDT     Sunset
Tue -- 08:34 PM CDT     Moonset
Tue -- 09:05 PM CDT     0.38 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.30.30.30.30.20.20.30.30.30.30.30.30.40.40.40.40.40.40.40.40.40.4

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 (19,4,5,8)
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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.