Thursday, March30, 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 7:17AMSunset 7:46PM Thursday March 30, 2017 5:46 AM CDT (10:46 UTC) Moonrise 8:21AMMoonset 9:45PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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- 342 Am Cdt Thu Mar 30 2017
.small craft should exercise caution...
Today..Northwest winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon.
Tonight..Southwest winds 5 to 10 knots becoming south 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..Southeast winds 15 to 20 knots. Bay waters choppy.
Saturday..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and Thunderstorms in the morning, then a chance of showers and Thunderstorms in the afternoon.
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 in the afternoon. Bay waters slightly choppy. Showers and Thunderstorms likely.
Sunday night..West winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A chance of showers and Thunderstorms.
Monday..West winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..Southwest winds 5 to 10 knots becoming south 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 342 Am Cdt Thu Mar 30 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Higher period southerly seas will become mixed as a front pushes off the coast this morning with northwest winds. Elevated seas along with strong northwest winds this morning support a short small craft advisory for the offshore waters of the upper texas coast. Winds become southerly Friday and increase Friday night. A small craft advisory may be needed Friday night into Saturday for strong southerly winds. Another front may push off the coast Sunday night into Monday.

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 300845
afdcrp
area forecast discussion
national weather service corpus christi tx
345 am cdt Thu mar 30 2017

Short term (today through Friday)
A cold front is currently pushing off the middle texas coast as of
writing with NW surface winds developing in its wake. Some mid
and upper level cloudiness /associated with an approaching h5
trough axis and 105kt h25 jet currently overhead/ are expected to
persist through much of the morning with clearing skies this
afternoon as the upper level jet shifts east and the h5 trough
axis pushes through. Breezy conditions this morning will quickly
wane through the day as surface high pressure builds into the
region. Continued low humidity and cooler temps than Wed /still in
the 80s this afternoon across many areas/ should make today feel
rather nice.

Surface high pressure quickly shifts east tonight with southerly
flow redeveloping across the region. A 30 to 35 kt southerly llj
is prog to develop after midnight across the W brush country and
along the rio grande which should lead to breezy conditions for
these areas overnight. Farther east... Weaker wind fields and
clear skies should allow for many inland areas across the coastal
plains to fall into the mid/upper 50s for min temps.

Waa strengthens Friday as the next storm system digs into the sw
conus and as surface pressures lower across texas. Breezy to
windy conditions are expected during the day along with
significantly warmer temps. H85 temps are prog to increase to 19
to 20 c across the coastal plains to 20 to 22 c across the brush
country... Translating to afternoon highs in the 80s to low 90s.

Sunny skies will continue with very limited moisture depth.

Long term (Friday night through Wednesday)
The deterministic ecmwf/gfs continue to predict the upper
disturbance to approach texas Saturday... Move across the region
Saturday night/Sunday... Then move east of the cwa/msa by early
Monday. Increasing onshore flow with at least scec conditions
expected over the msa Friday night through early Sunday. Increasing
upper forcing associated with this system expected over the cwa/msa
Saturday with the bulk of the dynamics Sunday. GFS deterministic
increase pwat values to above normal Saturday/Sunday mainly over the
ern cwa. Expect the combination of moisture/upper forcing to
contribute to isolated/scattered convection Saturday and
scattered/numerous convection Sunday. Anticipate that some storms
will at least become strong given GFS deterministic prediction of
very high CAPE values during the afternoon hours Saturday/Sunday
(spc has issued a marginal risk of severe for the nrn CWA for
Saturday.) increasing subsidence/drying anticipated for Sunday
night/Monday as the upper system moves sufficiently east (gfs
ensemble mean.)

Marine A cold front is currently pushing off the middle texas
coast. A period of strong n/nw flow may develop this morning
across nearly all marine areas. The strong flow should rapidly
weaken by midday /if not earlier/ as high pressure builds into the
area. Small craft advisories are in effect for most areas this
morning. S/se flow returns Friday with the strongest flow expected
across bay/waterways from baffin bay to port aransas where
additional small craft advisories may be required for the mid/late
afternoon hours on Friday.

Preliminary point temps/pops
Corpus christi 80 59 87 70 84 / 0 0 0 10 20
victoria 79 56 87 67 82 / 0 0 0 10 30
laredo 85 63 95 69 94 / 0 0 0 10 10
alice 83 55 92 68 90 / 0 0 0 10 20
rockport 80 63 86 72 81 / 0 0 0 10 20
cotulla 83 59 95 66 91 / 0 0 0 10 20
kingsville 84 56 92 69 89 / 0 0 0 10 10
navy corpus 77 65 85 72 81 / 0 0 0 10 10

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

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

Rh/79... Short term
wc/87... Long term


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 0 mi46 min NNW 11 G 17 66°F 78°F1011.6 hPa (+1.6)
SDRT2 - 8773037 - Seadrift, TX 17 mi46 min NW 11 G 15 65°F 73°F1011.5 hPa (+1.0)
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi46 min NNW 23 G 28 68°F 1010.9 hPa (+1.2)
MBET2 21 mi46 min N 21 G 25 68°F
AWRT2 30 mi46 min NNW 8 G 11 63°F 76°F1011.3 hPa (+1.0)
EMAT2 37 mi46 min NW 12 G 14 64°F 76°F1009.8 hPa (+0.9)
MAXT2 - Mission-Aransas Reserve, TX 42 mi46 min 11 67°F 1012 hPa (+1.0)54°F
CPNT2 43 mi46 min NNW 17 G 21 67°F 76°F
RCPT2 - 8774770 - Rockport, TX 49 mi46 min N 12 G 19 67°F 78°F1011.2 hPa (+1.2)

Wind History for Port OConnor, TX
(wind in knots)    EDIT      (on/off)   Help
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SE6
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S6
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G8
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NW18
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G28
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SE16
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G23
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G24
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G22
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G31
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G30
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G27
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G23
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SE11
SE6
E4
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SE11
SE11
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G14
SE14
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G17
SE15
SE17
SE17
SE18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX4 mi51 minN 010.00 miFair62°F57°F85%1011.8 hPa
Palacios Municipal Airport, TX19 mi53 minNNW 1110.00 miFair63°F52°F68%1011 hPa
Victoria, Victoria Regional Airport, TX23 mi55 minNNW 910.00 miFair61°F52°F72%1011.9 hPa

Wind History from PKV (wind in knots)
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Last 24hrCalmCalmSE10N11CalmCalmCalmCalmNE5N3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN10NW8N4
1 day agoSE10SE9SE6SE11SE16
G20
SE16
G21
SE17
G25
SE17
G27
SE23
G27
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G29
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G30
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G28
SE13
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S13S12
G17
Calm
2 days agoCalmCalmCalmCalmS7CalmS8
G15
S12
G17
S12S10
G16
S10
G16
CalmS10CalmCalmCalmCalmCalmCalmCalmSE10S11
G16
S11
G14
S10
G14

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Thu -- 04:26 AM CDT     0.29 feet Low Tide
Thu -- 07:18 AM CDT     Sunrise
Thu -- 09:20 AM CDT     Moonrise
Thu -- 02:07 PM CDT     0.96 feet High Tide
Thu -- 07:43 PM CDT     Sunset
Thu -- 10:44 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.30.30.30.30.40.50.70.80.90.91110.90.90.90.90.80.80.80.7

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Thu -- 07:18 AM CDT     Sunrise
Thu -- 07:22 AM CDT     0.20 feet Low Tide
Thu -- 09:21 AM CDT     Moonrise
Thu -- 07:43 PM CDT     Sunset
Thu -- 10:36 PM CDT     0.46 feet High Tide
Thu -- 10:44 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.30.30.30.20.20.20.20.20.30.30.30.30.40.40.40.40.40.40.40.50.50.5

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 (6,6,7,8)
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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.