Tuesday, April24, 2018 L-36.com


Marine Weather and Tides
Seadrift, TX

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:51AMSunset 8:00PM Tuesday April 24, 2018 7:40 PM CDT (00:40 UTC) Moonrise 1:56PMMoonset 2:32AM Illumination 72% Phase: Waxing Gibbous; Moon at 10 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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GMZ235 Bays And Waterways From Port Aransas To Port O'connor- 354 Pm Cdt Tue Apr 24 2018
Tonight..South wind 5 to 10 knots. Bays smooth.
Wednesday..Southeast wind 5 to 10 knots. Bays smooth.
Wednesday night..Southeast wind 5 to 10 knots becoming north 10 to 15 knots after midnight. Bays slightly choppy to occasionally choppy. A slight chance of Thunderstorms in the evening. A slight chance of showers.
Thursday..North wind 10 to 15 knots becoming east 5 to 10 knots in the afternoon. Bays slightly choppy to occasionally choppy.
Thursday night..Southeast wind 5 to 10 knots shifting south after midnight. Bays smooth.
Friday..North wind 10 to 15 knots. Bays slightly choppy to occasionally choppy.
Friday night..Northeast wind 5 to 10 knots. Bays smooth to slightly choppy.
Saturday..Northeast wind 5 to 10 knots shifting east in the afternoon. Bays smooth.
Saturday night..Southeast wind 5 to 10 knots. Bays smooth.
Sunday..Southeast wind 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bays slightly choppy to occasionally choppy.
Sunday night..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms.
GMZ200 354 Pm Cdt Tue Apr 24 2018
Synopsis for the middle texas coastal waters.. A weak to moderate onshore flow is expected Wednesday ahead of a cold front that will push south across the area Wednesday night. A weak north to northeast wind will develop on Thursday. Winds briefly veer to the east on Thursday night, but another surge of high pressure backs winds to the northeast again on Friday, prevailing through the end of the week. Onshore flow will return, strengthening to a moderate flow on Sunday.

7 Day Forecast for Marine Location Near Seadrift, TX
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location: 28.41, -96.71     debug


Area Discussion for - Corpus Christi, TX
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Fxus64 kcrp 242349
afdcrp
area forecast discussion
national weather service corpus christi tx
649 pm cdt Tue apr 24 2018

Discussion
Note aviation discussion below corresponding to the 00z tafs.

Aviation
Vfr conditions this evening will transition to a mixture of MVFR
ceilings and MVFR ifr visibilities overnight early Wednesday
morning. Anticipate predominateVFR ceilings by late morning
Wednesday. Isolated to scattered showers and thunderstorms are
expected to develop wednesdsay afternoon, mainly west of u.S. 281.

Weak moderate onshore flow this evening, light south or variable
overnight early Wednesday morning, becoming moderate onshore
Wednesday afternoon.

Previous discussion issued 352 pm cdt Tue apr 24 2018
short term (tonight through Wednesday night)...

another tranquil evening is in store for south texas with light east-
southeast flow. Some higher level clouds expected to move in late
tonight as low-level moisture continues to stream in from the gulf.

With higher dewpoints and lighter boundary layer winds more patchy
fog is expected over the coastal plains and victoria crossroads.

Areas of stratus is also possible by tomorrow morning with light
winds in the low-levels and weak isentropic lift along the 295k
layer.

Wednesday late afternoon early evening look rather interesting
across the rio grande plains. Here's what we are thinking:
* surface cold front moves into the region from the north-northwest
late in the afternoon.

* convection develops in the sierra madres' late afternoon ahead of
the boundary.

* mid-level shortwave ejects out of the big bend region carrying
more convection towards the south-southeast.

* these two clusters of storms could merge and move east-southeast
into our region along with the cold front.

* ample instability and shear across the rio grande plains could
make for strong to possibly severe thunderstorms.

* large hail and damaging winds are the main threats.

A few things remain a bit uncertain however. The best instability
looks to remain locked just to the west of the region, in mexico,
not sure if any of the higher instability makes it into our region.

Northwest flow events are tough as the sharp cut-off of lift can
limit convection... Confined mostly to the western third of our
region. How far east does the stronger convection, if it develops,
make it?
for now we increased the pops and added in some enhanced wording for
rainfall and possibly stronger winds. Tried to show a gradient in
the rain and storm chances as you head eastward with victoria
crossroads and the northern coastal bend expected to see less
rainfall at this time. As the surface front moves through there
could still be a bit of leftover lift along the 850mb boundary which
would keep some isolated showers across the region through at least
sunrise.

Long term (Thursday through Tuesday)...

slightly cooler and drier conditions will develop on Thursday with a
weak northeasterly flow in the morning and early afternoon. A weak
onshore flow will develop briefly Thursday night. However, a
reinforcing surge of high pressure will push into the region on
Friday as an upper level shortwave moves down the northwest flow
aloft into the lower mississippi valley. Precipitable water values
remain limited across the region on Friday, though slightly higher
across the western brush country. Anticipate most locations to
remain dry, but could see an isolated shower pop up over the brush
country as the boundary moves into the area. Near to slightly below
seasonable temperatures will prevail through the end of the week.

Light northeasterly flow will gradually transition back to the
southeast as surface high pressure shifts east of the area. Onshore
flow will strengthen on Friday, gradually bringing more moisture
back into the region. An unsettled weather pattern will begin to
develop in the extended as a deep trough begins digging into the
western CONUS and weak perturbations in the flow aloft may traverse
the region. Aided by daytime heating, an isolated shower or
thunderstorm will be possible during the early work week.

Preliminary point temps pops
Corpus christi 64 83 61 79 61 0 10 40 10 10
victoria 59 84 58 79 56 0 10 20 10 10
laredo 68 89 63 79 65 10 50 70 10 10
alice 61 88 60 81 60 0 10 50 10 10
rockport 69 79 60 77 63 0 10 20 10 10
cotulla 63 87 60 79 61 0 60 50 10 10
kingsville 63 87 61 81 61 0 10 50 10 10
navy corpus 70 80 64 77 66 0 10 30 10 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
SDRT2 - 8773037 - Seadrift, TX 0 mi41 min SE 12 G 13 76°F 80°F1015.6 hPa (-0.9)
AWRT2 13 mi41 min S 8.9 G 14 74°F 79°F1015.7 hPa (-0.7)
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi41 min SSE 11 G 12 74°F 76°F1015.2 hPa (-1.0)
VCAT2 17 mi41 min SE 11 G 13 75°F 78°F1015 hPa (-1.1)
MBET2 20 mi41 min S 11 G 12 73°F 73°F1014.3 hPa (-1.0)
ANPT2 43 mi41 min SE 11 G 12 73°F 74°F1015.3 hPa (-0.0)
RTAT2 - 8775237 - Port Aransas, TX 44 mi41 min SE 7 G 12 74°F 73°F1016.3 hPa (-0.0)
EMAT2 47 mi41 min SSE 7 G 8.9 73°F 77°F1015 hPa (-0.9)

Wind History for Seadrift, 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, TX17 mi46 minSE 810.00 miFair80°F60°F52%1015.2 hPa

Wind History from PKV (wind in knots)
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Last 24hrS8SW9SW9SW8SW6SW3CalmCalmNE5CalmN4NE5CalmN4CalmNE3SE5SE4SE5NE4S4SE4SE6SE9
1 day agoN5N5NE3CalmCalmCalmNE5N3N4N4N3CalmN3CalmNE7NE7NE4N5N6W7SW4NW3NW5S9
2 days agoSE11
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Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Tue -- 12:20 AM CDT     0.65 feet High Tide
Tue -- 03:32 AM CDT     Moonset
Tue -- 06:52 AM CDT     Sunrise
Tue -- 09:58 AM CDT     0.47 feet Low Tide
Tue -- 02:56 PM CDT     Moonrise
Tue -- 07:57 PM CDT     Sunset
Tue -- 11:57 PM CDT     0.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.60.60.60.60.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.60.6

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Tue -- 03:32 AM CDT     Moonset
Tue -- 06:51 AM CDT     Sunrise
Tue -- 10:23 AM CDT     0.39 feet Low Tide
Tue -- 02:55 PM CDT     Moonrise
Tue -- 07:57 PM CDT     Sunset
Tue -- 08:05 PM CDT     1.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.1110.90.80.70.60.50.40.40.40.50.60.70.811.11.21.21.31.21.21.2

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Corpus Christi, TX (20,4,5,8)
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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.