Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Seadrift, TX

Version 3.4
What's New / NOTES
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 6:29AMSunset 8:31PM Thursday June 22, 2017 3:23 PM CDT (20:23 UTC) Moonrise 4:12AMMoonset 6:02PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 1024 Am Cdt Thu Jun 22 2017
Rest of today..West wind 5 to 10 knots shifting southwest early in the afternoon, then becoming south 10 to 15 knots late in the afternoon. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms.
Tonight..South wind 15 to 20 knots. Bays choppy.
Friday..South wind 15 to 20 knots. Bays choppy.
Friday night..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms after midnight.
Saturday..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms.
Saturday night..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
Sunday..East wind 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
Sunday night..Southeast wind 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
Monday..East wind 5 to 10 knots. Bays smooth. A chance of showers and Thunderstorms.
Monday night..East wind 5 to 10 knots. Bays smooth. A chance of showers and Thunderstorms.
GMZ200 1024 Am Cdt Thu Jun 22 2017
Synopsis for the middle texas coastal waters.. Offshore flow this morning will gradually transition to onshore, and increase. The onshore flow will then strengthen to moderate to strong levels tonight and continue into Friday. A few showers and possible Thunderstorms may occur today mainly east of port aransas. Rain chances will increase this weekend and into early next week as moisture increases and an upper level trough moves across the area. A frontal boundary will move close to the waters on Monday, resulting in a weak easterly flow.

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 221741 aac
afdcrp
area forecast discussion... Updated
national weather service corpus christi tx
1241 pm cdt Thu jun 22 2017

Discussion
See aviation discussion for 18z tafs.

Aviation
Vfr conditions expected with mid high clouds diminishing during
the period. Winds becoming southerly later today and maintaining a
weak southerly flow tonight. Winds increase around 15z Friday
with some gusts as pressure gradient tightens.

Previous discussion issued 1055 am cdt Thu jun 22 2017
discussion...

just some minor adjustments to the first period. Did remove the
mention of rain over the victoria area, but kept it offshore in
case a band develops later this afternoon (short-term models not
showing much however). Removed thunder too. So far temperatures
are running a bit cool in a few locations (like crp) but for now
will let the forecast ride as the same thing happened yesterday
and we went past the century mark anyway. Concerning the heat
advisory, winds are expected to become sse later this afternoon
and dew points will go back up which could bring values 110f or
more, so will maintain it at this time as even if it does not make
it for two hours it will be hot and humid anyway.

As a final note... The coastal flood advisory will likely be
extended for one more 18-24 hour period, since the tides are
still running 1 to 2 feet above predicted and another high tide at
bob hall pier is expected to bring levels 2 feet or more (but
should not be 3 like for the 1-2 hours early this morning). Will
likely allow the high rip current risk expire and not re-
issue extend this after 7 pm. Will evaluate timing issues with the
cfw for the afternoon package.

Marine...

some adjustments to the winds and waves, but overall the forecast
was fine. Did adjust the shower a bit for today but no other
significant changes.

Previous discussion... Issued 651 am cdt Thu jun 22 2017
discussion...

updated for 12z aviation.

Aviation...

vfr conditions are expected during the next 24 hours. Light and
variable winds this morning will become more southerly and
southeasterly by this afternoon. A few gusts around 20 knots will
be possible this afternoon, but winds will then subside around
02z 03z. Vcsh remarks were retained at vct through the afternoon
as precip shield associated with TS cindy rotate through.

Previous discussion... Issued 353 am cdt Thu jun 22 2017
short term (today through Friday)...

tropical storm cindy currently is approaching the tx la state
line. Despite TS cindy passing off to our northeast, a host of
impacts continue across south texas this morning.

Early morning radar imagery shows an area of rain associated with
ts cindy approaching the victoria crossroads. Will keep 20 pops
over the northern coastal bend and victoria region as western
fringes of TS or what's left it rotate through today. Coastal
flood issues will persist today as elevated swells continue along
the mid texas coast. Bob hall pier has recently just exceeded 3
feet msl, but will monitor trends over the next little while to
see if coastal flood warning will be needed. The only other change
to the coastal flood headline was to include san patricio and
refugio counties in the advisory as minor flooding was noted in
ingleside on the bay and bayside earlier. In addition, the high
risk of rip currents will continue as well, but as the day
progresses swells should be on the downswing. For now, these
hazards will run through 00z but may be cancelled early if
conditions improve.

The other weather issue today and again tomorrow will be the
heat. High temps this afternoon could reach 107 108 over the rio
grande with 100s approaching the southern coastal bend. Dewpoints
may remain a little elevated along the southern coastal bend
resulting in heat index values of 110 or greater for a few hours.

A heat advisory will be issued for nueces and kleberg counties.

Temperatures on Friday will be similar to today. However, onshore
flow will resume by late this afternoon and evening, bringing
higher dewpoints back to south texas by tomorrow. Current
forecast has a large part of the area in heat advisory criteria
for Friday, mainly west of a line from beeville to taft to corpus
christi.

Marine...

elevated seas will continue through about 12z this morning over
the offshore gulf waters. Onshore flow will resume late this
afternoon and quickly strengthen by this evening. Additional small
craft advisories will be needed for the southern bays and gulf
waters later today.

Long term (Friday night through Wednesday)...

medium range guidance in agreement that the band of deeper mstr
evident on satellite imagery over the central gulf yucatan will be
pushing into the area early in the period. Showers will become
scattered over the waters Friday night and gradually spread into the
immediate coastal areas during the morning. Convective chances will
then increase diurnally inland... Esply as sea breeze spreads in.

Clouds and scattered precip will keep readings svrl deg cooler than
the preceding days.

Deep mstr (pwat AOA 2 inches) will be present over the area through
the weekend into early next week with an upper level shear axis
overhead. May also see a boundary, likely upstream convection
driven, drop into the area Sunday or Monday. Bottom line, we'll
continue with mainly chance pops through the period along with a
refreshing break from the high heat. Somewhat drier air is expected
to infiltrate the CWA by Wednesday as the mid upr shear axis
weakens.

Preliminary point temps pops
Corpus christi 81 99 80 92 77 10 10 20 40 30
victoria 80 97 78 92 75 10 10 20 40 30
laredo 80 108 79 99 77 0 0 10 30 30
alice 78 103 78 96 75 0 0 20 40 30
rockport 83 93 82 90 79 10 10 20 30 30
cotulla 78 106 79 99 76 0 0 10 30 30
kingsville 79 100 79 95 76 0 0 20 30 30
navy corpus 83 94 82 91 80 10 10 20 30 30

Crp watches warnings advisories
Tx... High rip current risk until 7 pm cdt this evening for the
following zones: aransas... Calhoun... Kleberg... Nueces.

Coastal flood advisory until 7 pm cdt this evening for the
following zones: aransas... Calhoun... Kleberg... Nueces...

refugio... San patricio.

Heat advisory until 7 pm cdt this evening for the following
zones: kleberg... Nueces.

Gm... Small craft advisory from 7 pm this evening to 7 am cdt Friday
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 from 4 pm this afternoon to 7 am cdt Friday
for the following zones: bays and waterways from baffin bay
to port aransas.

Gw 86... Aviation


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDRT2 - 8773037 - Seadrift, TX 0 mi54 min SSE 14 G 17 87°F 86°F1006 hPa
AWRT2 13 mi54 min S 9.9 G 14 88°F 85°F1006.1 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi54 min SSE 14 G 15 84°F 1006.2 hPa
VCAT2 17 mi54 min SSE 8 G 12 88°F 85°F1005.7 hPa
MBET2 20 mi54 min SSW 11 G 12 84°F
MAXT2 - Mission-Aransas Reserve, TX 26 mi84 min SSE 14
CPNT2 26 mi54 min SSE 9.9 G 12 86°F 87°F
RCPT2 - 8774770 - Rockport, TX 32 mi54 min S 11 G 15 86°F 87°F1005.8 hPa
MIST2 43 mi69 min SSE 13 87°F 1007 hPa78°F
ANPT2 43 mi54 min ESE 13 G 16 85°F 85°F
RTAT2 - 8775237 - Port Aransas, TX 44 mi54 min SSE 8.9 G 16 87°F 86°F1006.2 hPa
PTAT2 - Port Aransas, TX 44 mi84 min SE 13 G 15 84°F 86°F1006.5 hPa (-0.3)76°F
EMAT2 47 mi54 min S 12 G 14 87°F 85°F1005.7 hPa

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 mi49 minN 010.00 miFair91°F74°F58%1006.1 hPa

Wind History from PKV (wind in knots)
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Last 24hrN13
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N9CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoNE11
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SE8CalmCalmCalmCalmNE6CalmCalmCalmCalmCalmCalmCalmCalm--N11
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE9
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G17
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G15
NE13

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Thu -- 05:12 AM CDT     Moonrise
Thu -- 06:30 AM CDT     Sunrise
Thu -- 07:23 AM CDT     0.11 feet Low Tide
Thu -- 06:07 PM CDT     0.42 feet High Tide
Thu -- 07:02 PM CDT     Moonset
Thu -- 08:27 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.20.20.20.20.10.10.10.10.10.20.20.20.30.30.40.40.40.40.40.40.40.30.3

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Thu -- 01:25 AM CDT     0.01 feet Low Tide
Thu -- 05:11 AM CDT     Moonrise
Thu -- 06:29 AM CDT     Sunrise
Thu -- 01:13 PM CDT     1.05 feet High Tide
Thu -- 07:01 PM CDT     Moonset
Thu -- 08:27 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1000.10.20.30.50.60.70.90.911111110.90.80.60.50.30.2

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 Corpus Christi, TX (16,3,4,5)
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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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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.