Friday, October20, 2017

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 7:32AMSunset 6:55PM Friday October 20, 2017 1:05 PM CDT (18:05 UTC) Moonrise 7:13AMMoonset 6:50PM Illumination 0% Phase: New Moon; Moon at 0 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- 955 Am Cdt Fri Oct 20 2017
Rest of today..Southeast wind 5 to 10 knots. Bays smooth. Isolated showers.
Tonight..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. Isolated showers in the evening, then scattered showers and isolated Thunderstorms after midnight.
Saturday..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. Scattered showers in the morning. Isolated Thunderstorms. Isolated showers in the afternoon.
Saturday night..Southeast wind 10 to 15 knots becoming south 5 to 10 knots after midnight. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
Sunday..West wind 5 to 10 knots becoming north around 15 knots in the afternoon. Bays slightly choppy to choppy. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon.
Sunday night..North wind 15 to 20 knots. Bays choppy to occasionally rough.
Monday..North wind 10 to 15 knots. Bays slightly choppy to occasionally choppy.
Monday night..Northeast wind 5 to 10 knots shifting west after midnight. Bays smooth.
Tuesday..Northwest wind 5 to 10 knots becoming north 10 to 15 knots in the afternoon. Bays slightly choppy to occasionally choppy.
Tuesday night..North wind 15 to 20 knots. Bays choppy to occasionally rough.
GMZ200 955 Am Cdt Fri Oct 20 2017
Synopsis for the middle texas coastal waters.. Weak flow will become more southeasterly and southerly through the day...with a weak to moderate southeast flow by this evening and persisting into Saturday. Isolated to scattered showers will be possible at times today through Saturday. Scattered showers and Thunderstorms are expected Saturday night through Sunday with a cold front pushing through the area Sunday afternoon. A strong northerly flow will occur in the wake of the cold front Sunday night into Monday. Small craft advisories will likely be needed Sunday night into Monday with the strengthening offshore flow and elevated seas. Northerly flow will weaken slightly Monday night into Tuesday. Another cold front will increase the offshore flow to moderate to strong levels again Tuesday night.

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

Area Discussion for - Corpus Christi, TX
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Fxus64 kcrp 201746
area forecast discussion
national weather service corpus christi tx
1246 pm cdt Fri oct 20 2017

Have issued a coastal flood advisory for nueces and kleberg
counties until 02z this evening. Tides have been persistently
running close to 1 foot above normal. This will lead to tides of
approx. 2 feet above msl this afternoon during high tide.

Previous discussion issued 1213 pm cdt Fri oct 20 2017

see aviation discussion below for the 18z taf's.


a couple of sites continue to report MVFR cig's, with the
remainder of the area reportingVFR conditions.VFR conditions are
expected through the afternoon into tonight. By late tonight into
early Sat morning, patchy fog and low stratus will lead to ifr
conditions, mainly for ali and vct and generally MVFR for lrd and
vct.VFR conditions are then expected to resume by mid morning
sat. There is a slight chance to chance of mainly
shra's... Possibly a few tsra's... Across the far eastern coastal
bend and over the waters overnight and into sat. Therefore have
included a vcsh for crp and vct for Sat morning.

Previous discussion... Issued 929 am cdt Fri oct 20 2017

patchy fog that has developed this morning should be short lived
and begin lifting within the hour. Otherwise, a few showers are
expected today, mainly across the vct area. A clap of thunder can
not be ruled out. Winds are forecast to become more southerly
today. This should keep tide levels from reaching 2ft above msl at
high tide this afternoon for area beaches south of port aransas,
although the tides may be just shy of 2ft msl. Will continue to
monitor for the possibility of tides reaching the 2ft mark. If
warranted, a coastal flood advisory may be issued for this

Previous discussion... Issued 636 am cdt Fri oct 20 2017
discussion... Update for 12z aviation.

Aviation... Worst flight rules to occur at beginning and end of
taf period. Areas of low CIGS and poor vsbys struggling to dvlp
this mrng... But drier air aloft is spreading nwrd early this mrng
and should allow for a small wind of reduced vsbys around shortly
after sunrise. Poor flight rules should then improve by mid to
late mrng withVFR prevailing across the entire area this aftn and
evening. Another round of reduced vsbys and low CIGS xpctd late
tonight. Iso shra possible today vcnty kvct... And late tonight
vcnty kcrp kvct but impacts should be minimal. Weak vrb calm sfc
winds early becmg weak serly sfc winds.

Previous discussion... Issued 405 am cdt Fri oct 20 2017
short term (today through Saturday)...

modest WAA regime early this morning in aiding in development of
isolated showers across the coastal plains. Llvl wind fields are
are prog to veer to a more southerly direction this
morning... With drier air just above the surface spreading
northward at that time. Once that occurs... The ongoing showers
should begin to dissipate with llvl cloud cover eventually mixing
out this morning. Some lingering llvl moisture may persist along
the W gulf and into the victoria area where a more persistent
chance of a shower may exist.

Axis of slightly deeper moisture is prog to develop along the
coast late tonight which should result in renewed shower
development for the coastal counties northward to the victoria
area... .Especially where any moisture convergence bands can setup.

Showers should end during the day Saturday across the coastal
plains as the h85 to h7 wind profile veers more southwesterly.

Chances of showers and perhaps a thunderstorm or two will continue
into the afternoon for the NE CWA where greater instability and a
more conducive wind profile (for precip) will exist.

H85 temps are prog to warm to around 17 18 c today across the
region (and even warmer on Saturday). With thinning cloud cover
and southerly flow... These warmer temps aloft should be able to
mix down to the sfc... Resulting in greater MAX temps than the past
couple of days.

Regarding coastal flooding... Tidal levels may approach 2 ft above
msl with today's major high tide cycle. But with wind fields prog
to become more sse than ese... I have decided to hold off on a
coastal flood advisory at this time as the veering wind should
begin to aid in negating greater wave runup.

Long term (Saturday night through Thursday)...

a strong short wave trough will be diving southeast through the
southern plains Saturday night. The associated cold front will be
pushing southward through texas Saturday night and be near the
northern counties of the forecast area by 12z Sunday. Moisture axis
will be over the gulf waters in advance of the front along with
moisture pooling along the boundary with models indicating pwat
values around 1.7 inches. Scattered convection will be possible over
the gulf Saturday night along with scattered convection moving into
the northern counties as the front approaches. Chance for rain will
be higher in a brief window Sunday morning as the cold front pushes
through the area. Will continue to show likely pops northeast to
slight chance pops far west Sunday morning. Cooler and drier air
will quickly move into the region by late afternoon. SCA conditions
will exist over the gulf waters Sunday night into Monday behind the
front. The short wave trough could develop into an upper low over
the mississippi alabama Monday. Another strong upper trough will dig
south through the central plains Monday night into Tuesday with a
deep trough forming over the great lakes region Tuesday. Another
surge in high pressure will arrive Tuesday afternoon with winds
increasing again over the coastal waters to SCA levels. Surface high
pressure area will settle into the region Wednesday night. Mild
temperatures will be in store for the work week with the coolest
readings on Wednesday.

Preliminary point temps pops
Corpus christi 88 72 89 74 89 10 20 20 20 40
victoria 86 72 89 72 85 20 20 30 40 60
laredo 90 71 92 73 87 10 10 10 10 20
alice 90 70 91 72 91 10 10 10 10 30
rockport 85 76 87 76 86 10 30 30 30 60
cotulla 89 70 92 71 86 10 10 10 20 30
kingsville 91 72 91 73 92 10 10 10 20 30
navy corpus 87 77 88 76 88 10 20 30 30 40

Crp watches warnings advisories
Tx... Coastal flood advisory until 9 pm cdt this evening for the
following zones: kleberg... Nueces.

Gm... None.

Te 81... Short term

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTAT2 - 8775237 - Port Aransas, TX 10 mi48 min W 6 G 6 79°F 77°F1016.1 hPa
ANPT2 11 mi54 min ESE 5.1 G 5.1 79°F 77°F1015.2 hPa
TAQT2 - 8775296 - Texas State Aquarium, TX 21 mi48 min 80°F 76°F1015.1 hPa
AWRT2 22 mi48 min ESE 4.1 G 5.1 80°F 74°F1016.1 hPa
NUET2 25 mi54 min NE 6 G 8 75°F1016 hPa
PACT2 - 8775792 - Packery Channel, TX 26 mi48 min W 1.9 G 4.1 81°F 76°F1016.1 hPa
MQTT2 - 8775870 - Malaquite Beach (Corpus Christi), TX 29 mi48 min ESE 5.1 G 6 80°F 78°F1015.5 hPa
SDRT2 - 8773037 - Seadrift, TX 35 mi48 min SW 4.1 G 4.1 79°F 75°F1016.3 hPa
IRDT2 38 mi48 min W 2.9 G 4.1 80°F 76°F1016.3 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 48 mi48 min NE 1.9 G 2.9 76°F 76°F1015.7 hPa
MBET2 49 mi48 min NNE 2.9 G 5.1 80°F 76°F1014.8 hPa

Wind History for Rockport, TX
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rockport Aransas County Airport, TX7 mi73 minNW 610.00 miA Few Clouds80°F73°F79%1016.3 hPa
Corpus Christi, Corpus Christi Naval Air Station/Truax Field, TX24 mi70 minW 410.00 miMostly Cloudy83°F71°F67%1015.9 hPa

Wind History from NGP (wind in knots)
Last 24hrNE11NE10NE11E10NE16E13E13E12E11NE11NE10E14--E8SE3CalmCalmN3CalmCalmCalmN3NW4W4
1 day agoNE9NE9E8E10E8E8E6E6E6E8E8SE9SE8SE5S3CalmNW3N4N5N6N8N8NE7NE9
2 days agoN75NW5NE8E6E7E6E5E4E4E4CalmCalmCalmW3W3NW3N7N6N7N6N5NE6N6

Tide / Current Tables for Rockport, Aransas Bay, Texas
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Fri -- 04:01 AM CDT     0.69 feet High Tide
Fri -- 07:31 AM CDT     Sunrise
Fri -- 08:12 AM CDT     Moonrise
Fri -- 01:21 PM CDT     0.48 feet Low Tide
Fri -- 06:53 PM CDT     Sunset
Fri -- 07:50 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Aransas Pass, Texas Current
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Aransas Pass
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Fri -- 12:46 AM CDT     -0.16 knots Max Ebb
Fri -- 02:31 AM CDT     0.00 knots Slack
Fri -- 03:26 AM CDT     0.07 knots Max Flood
Fri -- 04:15 AM CDT     -0.00 knots Slack
Fri -- 07:31 AM CDT     Sunrise
Fri -- 08:12 AM CDT     Moonrise
Fri -- 09:03 AM CDT     -0.87 knots Max Ebb
Fri -- 01:37 PM CDT     0.00 knots Slack
Fri -- 05:07 PM CDT     1.13 knots Max Flood
Fri -- 06:53 PM CDT     Sunset
Fri -- 07:50 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of SouthCentralPlains    EDIT

Wind Forecast for Corpus Christi, TX (14,3,4,5)
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Ground Weather Radar Station Corpus Christi, TX
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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 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 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.