Saturday, November18, 2017 L-36.com


Marine Weather and Tides
Rockport, TX

Version 3.4
What's New / NOTES
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.
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 6:52AMSunset 5:36PM Saturday November 18, 2017 8:08 AM CST (14:08 UTC) Moonrise 6:53AMMoonset 6:06PM Illumination 0% Phase: New Moon; Moon at 29 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- 328 Am Cst Sat Nov 18 2017
.small craft advisory in effect from this evening through Sunday morning...
Today..Southwest wind 10 to 15 knots shifting northwest late. Bays slightly choppy to occasionally choppy. A slight chance of showers in the afternoon.
Tonight..North wind 20 to 25 knots. Bays choppy to rough.
Sunday..North wind 15 to 20 knots becoming northeast 10 to 15 knots in the afternoon. Bays choppy to occasionally rough.
Sunday night..Northeast wind 5 to 10 knots. Bays smooth to slightly choppy.
Monday..Northeast wind 5 to 10 knots shifting southeast in the afternoon. Bays smooth.
Monday night..Southeast wind 5 to 10 knots shifting south after midnight. Bays smooth.
Tuesday..Southwest wind 5 to 10 knots shifting south in the afternoon. Bays smooth.
Tuesday night..East wind 10 to 15 knots becoming northeast 15 to 20 knots after midnight. Bays choppy to occasionally rough.
Wednesday..North wind 15 to 20 knots. Bays choppy to occasionally rough.
Wednesday night..North wind 10 to 15 knots. Bays slightly choppy to occasionally choppy.
GMZ200 328 Am Cst Sat Nov 18 2017
Synopsis for the middle texas coastal waters.. A moderate to strong southerly flow this morning will decrease through late morning ahead of a strong cold front. The cold front will move across the bays and coastal waters this evening, with strong offshore flow expected behind it. Small craft advisory conditions are expected this evening for the bays and coastal waters, then frequent gusts to gale force will develop by mid evening over the gulf waters where a gale warning is in effect for tonight. Offshore flow will begin to decrease on Sunday. Weak to moderate northeast flow Sunday night. Generally weak onshore flow anticipated Monday and Tuesday. Isolated showers anticipated Monday night in response to a weak coastal trough. Moderate northeast then north wind will develop Tuesday night and Wednesday as a surge of surface high pressure moves across the waters. Additional isolated showers Tuesday in response to the surge of surface high pressure and the associated upper level disturbance.

7 Day Forecast for Marine Location Near Rockport, TX
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location: 27.99, -97.07     debug


Area Discussion for - Corpus Christi, TX
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Fxus64 kcrp 181101
afdcrp
area forecast discussion
national weather service corpus christi tx
501 am cst Sat nov 18 2017

Discussion
See aviation discussion below for the 12z tafs.

Aviation
MVFR CIGS have developed across the eastern portions of S tx and
ifr lifr CIGS are across the brush country this morning.VFR
conditons are expected by mid morning. A low level jet around 30
knots has developed this morning, however sfc winds are sufficient
to preclude llws at this time. Sfc winds are expected to increase
through mid morning then shift around to the west ahead of a
strong cold front. Strong north winds are expected to develop
late this afternoon as the front moves to the south and southeast.

The strongest winds are expected to be this evening across the
coastal areas. Winds should diminish toward early Sunday morning
along with clear and dry conditions.

Previous discussion issued 420 am cst Sat nov 18 2017
short term (today through Sunday)...

a cold front currently moving across N and W tx this morning, is
expected to enter the N and W CWA between 11 am and 1 pm then reach
the coast between 3 pm and 6 pm and well south of the area by 9 pm
tonight. Strong north winds and cooler drier airmass will filter
into S tx behind the front late this afternoon and tonight. Advisory
conditions will develop across the bays and coastal waters beginning
around 6 pm this evening then continue to strengthen across the
coastal waters. Winds across the coastal waters are expected to
reach 25 to 30 knots sustained with frequent gusts to gale force
tonight. Therefore, a gale warning has been issued from 9 pm tonight
to 9 am Sunday. Winds are expected to decrease through Sunday
morning but will likely remain at advisory levels through Sunday
afternoon across the coastal waters. As for rain chances with the
cold front, moisture will be limited. Kept a mention of a slight
chance of -shra's along the coast and over the waters this afternoon
and evening. Much cooler and drier conditions expected tonight with
lows in the mid 40s across much of S tx to lower 50s along the coast.

Highs on Sunday will likely not reach 70 degrees despite abundany
sunshine.

Fire weather... Although strong northerly winds are expected to
develop this afternoon, humidity values will remain elevated. By the
time the humidity values drop to 20-30 percent on Sunday, the winds
will be much lower, therefore no fire weather concerns are expected
at this time.

Long term (Sunday night through Friday)...

cold temperatures expeced early Monday morning with readings in the
40s. The GFS and ECMWF deterministic output is generally consistent
in predicting an upper disturbance to move across the SRN plains tx
Sunday night Monday, followed by another distubance Tuesday along
with a transiton to a high amplitude upper pattern with a trough
over the ern CONUS ridge over the wrn CONUS and thus subsidence over
the CWA msa Tuesday night through the remainder of the period. Do
not expect significant precipitation associated with the Sunday
night Monday disturbance given dry atmospheric conditions (gfs
deterministic pwat values.) however, moisture convergence associated
with a weak surface coastal trough Monday night early Tuesday (gfs
ensemble mean) may generate isolated showers over the msa. The
Tuesday disturbance is expected to generate a surge of surface high
pressure across the CWA msa late Tuesday early Wednesday. Additional
isolated shower activity anticipated Tuesday afternoon night over
the msa owing to the combination of convergence associated with the
surge corresponding upper disturbance. Drier conditions expected
Thursday Friday owing to increasing subsidence.

Preliminary point temps pops
Corpus christi 90 49 68 50 71 10 10 0 10 10
victoria 85 45 66 43 69 10 0 0 10 10
laredo 86 51 67 48 69 0 0 0 10 10
alice 91 48 69 47 72 10 0 0 10 10
rockport 83 52 66 52 69 10 10 0 10 10
cotulla 85 46 67 44 69 0 0 0 10 10
kingsville 91 50 69 48 72 10 10 0 10 10
navy corpus 84 55 67 56 70 10 10 0 10 10

Crp watches warnings advisories
Tx... None.

Gm... Small craft advisory until 9 am cst this morning for the
following zones: 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 6 pm to 9 pm cst this evening 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.

Gale warning from 9 pm this evening to 9 am cst Sunday 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 6 pm this evening to 9 am cst Sunday
for the following zones: bays and waterways from baffin bay
to port aransas... Bays and waterways from port aransas to
port o'connor.

Te 81... Aviation


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTAT2 - Port Aransas, TX 11 mi68 min S 21 G 23 76°F 75°F1010.1 hPa (+0.0)72°F

Wind History for Rockport, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rockport Aransas County Airport, TX7 mi75 minS 9 G 188.00 miFair74°F71°F91%1010.7 hPa
Corpus Christi, Corpus Christi Naval Air Station/Truax Field, TX24 mi72 minS 1310.00 miFair75°F71°F88%1010.4 hPa

Wind History from RKP (wind in knots)
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Last 24hr6S11
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1 day agoSE5S6S10S9S10S8S7SE8SE7SE8SE7SE7S6SE6S6S7S6S7S6S6S4S5S4S4
2 days agoSE6SE9S9S7S9SE10SE9SE9SE9SE8E7SE9SE8SE7SE6SE7SE5SE5SE5SE3SE3SE4CalmCalm

Tide / Current Tables for Rockport, Aransas Bay, Texas
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Rockport
Click for Map
Sat -- 01:58 AM CST     0.57 feet High Tide
Sat -- 05:42 AM CST     New Moon
Sat -- 06:52 AM CST     Sunrise
Sat -- 06:52 AM CST     Moonrise
Sat -- 12:11 PM CST     0.26 feet Low Tide
Sat -- 05:34 PM CST     Sunset
Sat -- 06:05 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.60.60.60.50.50.40.40.30.30.30.30.30.30.30.30.40.40.40.50.50.50.5

Tide / Current Tables for Aransas Pass, Texas Current
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Aransas Pass
Click for Map
Sat -- 05:42 AM CST     New Moon
Sat -- 06:51 AM CST     Sunrise
Sat -- 06:52 AM CST     Moonrise
Sat -- 07:24 AM CST     -1.39 knots Max Ebb
Sat -- 12:26 PM CST     0.00 knots Slack
Sat -- 04:17 PM CST     1.48 knots Max Flood
Sat -- 05:34 PM CST     Sunset
Sat -- 06:06 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.1-0.1-0.4-0.7-1-1.3-1.4-1.4-1.2-1-0.7-0.20.30.91.31.51.51.41.21.10.90.60.3

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 (9,2,3,4)
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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.