Monday, May22, 2017 L-36.com


Marine Weather and Tides
Palacios, 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 6:26AMSunset 8:14PM Monday May 22, 2017 12:36 PM CDT (17:36 UTC) Moonrise 3:16AMMoonset 3:56PM Illumination 9% Phase: Waning Crescent; Moon at 27 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- 1033 Am Cdt Mon May 22 2017
.small craft advisory in effect until 5 pm cdt this afternoon...
Rest of today..South winds 15 to 25 knots becoming west at 10 to 15 knots in the afternoon. Bay waters slightly choppy. Showers and Thunderstorms likely.
Tonight..Northeast winds around 5 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday..Northeast winds around 5 knots becoming east in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday night..Northeast winds 10 to 15 knots becoming north after midnight. Bay waters slightly choppy. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
Wednesday..North winds 5 to 10 knots. Bay waters smooth.
Wednesday night..South winds 5 to 10 knots. Bay waters smooth.
Thursday..South winds 10 to 15 knots. Bay waters slightly choppy.
Thursday night..South winds 15 to 20 knots. Bay waters choppy.
Friday..South winds around 15 knots. Bay waters slightly choppy to choppy.
Friday night..Southeast winds around 15 knots. Bay waters slightly choppy to choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1033 Am Cdt Mon May 22 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Very strong and gusty onshore winds will prevail this morning and afternoon in response to a developing area of low pressure over southeast texas. Periods of showers and Thunderstorms will be possible through Tuesday night. Some of the storms could become strong or severe. Winds and seas will be higher in and near these storms. A cold front will move through the area on Tuesday with winds shifting to the north behind the boundary. This will result in increasing northerly winds and building seas Tuesday night. Onshore winds should return Wednesday night and strengthen through the end of the week.

7 Day Forecast for Marine Location Near Palacios, TX
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location: 28.69, -96.39     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 221723
afdhgx
area forecast discussion
national weather service houston/galveston tx
1223 pm cdt Mon may 22 2017

Aviation
General trend this afternoon is for shra/tsra to move off to the east
with some ceiling improvement. Could see patchy fog/low CIGS tonight/
early tomorrow morning. Might see some additional shra/tsra development
tomorrow as another front moves through the area. 42

Prev discussion /issued 1113 am cdt Mon may 22 2017/
update...

main update to the ongoing forecast was to update rain chances and
the flash flood watch based on latest trends. Have removed
jackson, fort bend, and matagorda from the watch as the heaviest
rain threat continues to shift eastward as a surface low/mcv lifts
along the upper texas coast. Morning soundings from lake charles
and corpus christi both showed precipitable water values in the
1.75-2 inch range, which combined with about 1000 j/kg of cape
along the coast, has been sufficient to produce peak rain rates
around 2-2.5 inches an hour. Expect the flooding threat to
gradually shift east with this main complex with time, but
extensions or adjustments to the ongoing flash flood watch are
possible based on short term trends. With surface winds ahead of
this surface low/mcv slightly backed, cannot rule out a brief,
weak tornado or two as a line of storms associated with it
continues to lift across galveston and chambers counties.

Farther north, divergent flow aloft and low level speed/direction
convergence across the northern half of the forecast area is
resulting in a secondary area of moderate to occasionally heavy
rain. Minor flooding issues will be possible across these areas
through mid afternoon as high rain rates contribute to ponding of
water on roads. Expect all activity to continue to move east to
the region by mid to late afternoon as an associated shortwave
trough also pushes east of the region.

Huffman
prev discussion... /issued 501 am cdt Mon may 22 2017/
forecast remains pretty much on track and made just minor tweaks
to the ongoing package.

An MCV has developed with the large cluster of precip west of
matagorda bay. This should continue trekking mostly eastward
today. Surface boundary situated just offshore focused some 5"+
totals overnight. The hope was it would stay there but has since
edged closer to the coast and into the galveston bay area.

Convergent zone appears to be setting up from roughly liberty to
matagorda bay. Inflow has really ramped up offshore with sustained
25-30 knot llvl SE winds perpendicular to this zone. Hopefully
the MCV takes a more ese track in the coming hours and pulls this
boundary back offshore. But there's considerable uncertainty and
with resident 2-2.3" pw's, felt is was best to issue a short fused
flash flood watch and re-evaluate trends in the coming hours.

Those details are in that product that's already been sent.

Bulk of precip should be headed off to the east later in the
afternoon and early evening. With the exception of offshore
areas, most of the region should see a break in the action
tonight. Rain and isolated storm chances return Tue aftn and evng
as a cold front makes its way into the region. The remainder of
the work week should be dry in the wake of the front. Pleasant
temps on Wed will gradually modify back into the 70s/90s Thursday
and into the weekend as onshore winds resume. Next shot of rain
looks to be late Sunday or early next week with the approach of
another weak front. 47
marine...

strong and gusty onshore winds will prevail today into this evening
as low-level jet develops over SE tx. Scattered showers and thunder-
storms are possible thru tues night as a series of upper level dist-
urbances move in from the west and interacts with left-over surface
boundaries lingering over the region. Models remain on track with a
cold front moving into the coastal waters tues... With the stronger/
deeper northerly flow not making it into the gulf until tues night/
weds morning. Caution flags may be needed during this time. Onshore
winds are set to return to the area by weds night and then strength-
ening the rest of the week. 41

Preliminary point temps/pops
College station (cll) 75 65 80 57 81 / 80 20 50 40 0
houston (iah) 77 67 82 60 83 / 90 20 40 40 0
galveston (gls) 81 73 82 66 81 / 100 50 30 40 0

Hgx watches/warnings/advisories
Tx... Flash flood watch until 1 pm cdt this afternoon for the
following zones: brazoria... Chambers... Fort bend...

galveston... Harris... Liberty.

Gm... Small craft advisory until 5 pm cdt this afternoon for the
following zones: coastal waters from freeport to the
matagorda ship channel out 20 nm... Coastal waters from high
island to freeport out 20 nm... Galveston bay... Matagorda
bay... Waters from freeport to the matagorda ship channel
from 20 to 60 nm... Waters from high island to freeport from
20 to 60 nm.

Discussion... 14
aviation/marine... 42


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAT2 12 mi61 min SE 12 G 15 78°F 80°F1013.3 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi61 min SE 9.9 G 11 77°F 1013.2 hPa
MBET2 19 mi61 min S 8.9 G 11 78°F
EMAT2 25 mi61 min E 13 G 17 76°F 80°F1013.3 hPa
SDRT2 - 8773037 - Seadrift, TX 26 mi61 min SE 8.9 G 12 79°F 80°F1013.6 hPa
AWRT2 39 mi61 min SSE 9.9 G 16 77°F 80°F1013.3 hPa
SGNT2 41 mi61 min SSE 8 G 12 75°F 78°F1014.2 hPa
KBQX 48 mi42 min SE 9.9 G 17 81°F 81°F
MAXT2 - Mission-Aransas Reserve, TX 51 mi97 min 7 78°F 1014 hPa (+1.0)73°F

Wind History for Port OConnor, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palacios Municipal Airport, TX8 mi44 minSE 1310.00 miOvercast79°F73°F85%1013.5 hPa
Port Lavaca - Calhoun County Airport, TX16 mi42 minN 010.00 miMostly Cloudy81°F75°F83%1013.9 hPa

Wind History from PKV (wind in knots)
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Last 24hrSE15
G22
SE10CalmCalmCalmCalmCalmNE5
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CalmCalmCalmNE8
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NE9CalmCalmE5CalmCalmCalmCalmE10
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1 day agoSE12SE14SE12SE14CalmSE8SE11
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CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--CalmCalmCalmSE16
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G16
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Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Mon -- 12:43 AM CDT     0.67 feet Low Tide
Mon -- 04:17 AM CDT     Moonrise
Mon -- 06:31 AM CDT     Sunrise
Mon -- 07:18 AM CDT     0.94 feet High Tide
Mon -- 12:11 PM CDT     0.84 feet Low Tide
Mon -- 04:56 PM CDT     Moonset
Mon -- 05:17 PM CDT     1.01 feet High Tide
Mon -- 08:14 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.70.80.80.90.90.90.90.90.90.90.80.90.90.911110.90.80.70.6

Tide / Current Tables for Port Lavaca, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Mon -- 12:50 AM CDT     0.35 feet Low Tide
Mon -- 04:17 AM CDT     Moonrise
Mon -- 06:31 AM CDT     Sunrise
Mon -- 08:48 AM CDT     0.71 feet High Tide
Mon -- 02:00 PM CDT     0.64 feet Low Tide
Mon -- 04:11 PM CDT     0.65 feet High Tide
Mon -- 04:56 PM CDT     Moonset
Mon -- 08:14 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.40.50.60.60.70.70.70.70.70.70.60.60.60.60.60.60.60.50.40.30.2

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 Houston/Galveston, TX (13,3,4,5)
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Ground Weather Radar Station Houston/Galveston, 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.