Monday, August19, 2019 L-36.com


Marine Weather and Tides
Seadrift, TX

Version 3.4
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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:58AMSunset 8:05PM Monday August 19, 2019 3:34 PM CDT (20:34 UTC) Moonrise 9:43PMMoonset 9:25AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 1030 Am Cdt Mon Aug 19 2019
Rest of today..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers late in the morning.
Tonight..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy.
Tuesday..South wind 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. Bays slightly choppy to occasionally choppy. A slight chance of showers. A slight chance of Thunderstorms in the afternoon.
Tuesday night..Southeast wind 10 to 15 knots becoming south 5 to 10 knots after midnight. Bays slightly choppy to occasionally choppy.
Wednesday..Southeast wind 5 to 10 knots. Bays smooth. A slight chance of showers and Thunderstorms.
Wednesday night..Southeast wind 5 to 10 knots. Bays smooth. A slight chance of showers after midnight.
Thursday..Southeast wind 5 to 10 knots. Bays smooth. A chance of showers and Thunderstorms.
Thursday night..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms after midnight.
Friday..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
Friday night..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A chance of showers and Thunderstorms.
GMZ200 1030 Am Cdt Mon Aug 19 2019
Synopsis for the middle texas coastal waters.. Weak to moderate onshore flow is expected today through Friday. Increasing moisture will contribute to isolated to scattered showers and Thunderstorms through the week.


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 191818
afdcrp
area forecast discussion
national weather service corpus christi tx
118 pm cdt Mon aug 19 2019

Discussion
Note aviation discussion below corresponding to the 18z tafs.

Aviation
PredominateVFR conditions expected this afternoon evening then
transition to a mixture of MVFR andVFR ceilings overnight early
Tuesday morning. Anticipate predominate MVFR ceilings over the
coastal bend coastal plains during the mid late morning Tuesday
while isolated showers develop near the coast. Generally moderate
onshore flow this afternoon evening, becoming light variable
overnight, followed by an increase in wind speeds near the end of
the TAF period.

Prev discussion issued 623 am cdt Mon aug 19 2019
discussion...

12z aviation discussion follows.

Aviation...

observations show MVFR ceilings are very near cot and lrd at
present, so a tempo mention of lower ceilings will continue here
for a few more hours. The remaining terminals look to escape MVFR
clouds for now despite a lowVFR deck currently at vct. Still
expect some showers to affect the vct area later this morning or
afternoon, but lightning appears less likely than previously
indicated.

Prev discussion... Issued 344 am cdt Mon aug 19 2019
short term...

satellite and last evening's upper air obs showed the center of
the subtropical high had shifted about 300 miles west of corpus
christi. Although this may sound meaningful, the only byproduct
here will be a 1-2 degree drop in high temps today thanks to
slightly lower thicknesses. Following a few streamer showers this
morning, the best precip chances today should reside on the
eastern periphery of this ridge along the texas upper coast closer
to an axis of better 700-500 mb moisture, but some of this
activity may graze our NE zones this afternoon where slight chance
pops exist. As the upper high moves even farther northwest of the
region tomorrow, spotty showers and storms should expand west to
the i-37 corridor. In other news, today looks to be our last heat
advisory headline for a while as high temps continue to edge lower
Tuesday and beyond.

Long term...

models are in fair agreement with the mid level high shifting
northward as an inverted trough slides west across S tx by mid week.

This will allow deeper moisture to begin advecting into the area.

Best chance for rain will remain mainly over the waters Wed as a cap
will remain in place over S tx. The cap is progged to begin
weakening slightly Thu along with deepening moisture with pwats
approaching 2 inches across the eastern cwa. This should allow
convection to move farther inland by thu. Model solutions begin to
diverge somewhat by the end of the week, but both the GFS and ecmwf
show a weakness aloft but the ECMWF is farther east, thus the ecmwf
keeps most of the precip over the waters. Went with a blend of
models and have increasing chance of convection across the east on
fri. This trend continues through the weekend, with a slight chance
of precip across the western areas by sun. Given the differences in
model solutions over the weekend, kept pops at 40 percent or lower
over the land. Did go up to 50 percent over the waters where
confidence is a bit higher.

With the increase in moisture, high temps are expected to be closer
to normal with afternoon heat indices expected to reach 105-109
across a majority of S tx.

Marine...

occasionally moderate onshore this afternoon and evening will
become weak to moderate tonight and persist through the week.

Increasing moisture will contribute to isolated showers and
thunderstorms each day, increasing in coverage at times later this
week as a broad disturbance reaches the western gulf of mexico.

Preliminary point temps pops
Corpus christi 79 96 78 95 78 0 10 10 10 10
victoria 77 97 76 98 76 0 20 10 20 10
laredo 79 104 78 103 77 0 0 10 10 10
alice 77 100 76 101 76 0 10 10 10 10
rockport 82 91 81 91 80 10 20 10 20 20
cotulla 77 104 76 103 76 0 0 10 10 10
kingsville 78 99 77 99 77 0 10 10 10 10
navy corpus 82 91 81 92 81 10 20 10 10 20

Crp watches warnings advisories
Tx... Heat advisory until 6 pm cdt this evening for the following
zones: coastal kleberg... Coastal nueces... Inland kleberg...

inland nueces... Jim wells.

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 mi53 min SSE 13 G 15 88°F 90°F1014.8 hPa
AWRT2 13 mi53 min S 9.9 G 15 88°F 89°F1014.7 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi53 min S 13 G 16 87°F 88°F1014.5 hPa
VCAT2 17 mi53 min S 12 G 14 89°F 90°F1014.4 hPa
MBET2 20 mi53 min SSW 8.9 G 11 87°F 1013.9 hPa
RCPT2 - 8774770 - Rockport, TX 32 mi53 min 87°F 1014.4 hPa
ANPT2 43 mi53 min E 8 G 8.9 85°F 84°F1013.7 hPa
PTAT2 - Port Aransas, TX 44 mi35 min ESE 8.9 G 9.9 85°F 86°F1014.5 hPa (-1.1)81°F
RTAT2 - 8775237 - Port Aransas, TX 44 mi53 min SE 8 G 13 87°F 83°F1014.6 hPa
EMAT2 47 mi47 min SSE 9.9 G 13 88°F 90°F1014.6 hPa

Wind History for Seadrift, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX17 mi40 minS 11 G 1510.00 miMostly Cloudy97°F75°F50%1014.6 hPa

Link to 5 minute data for KPKV

Wind History from PKV (wind in knots)
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S12S13S11SE8SE7SE6SE4S3S5--SE3SE4S3S3CalmCalmS9S9S10SE8S11
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Tide / Current Tables for Pass Cavallo, Texas
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Pass Cavallo
Click for Map
Mon -- 06:57 AM CDT     Sunrise
Mon -- 07:51 AM CDT     1.28 feet High Tide
Mon -- 10:23 AM CDT     Moonset
Mon -- 12:04 PM CDT     0.79 feet Low Tide
Mon -- 07:24 PM CDT     1.14 feet High Tide
Mon -- 08:00 PM CDT     Sunset
Mon -- 10:40 PM CDT     Moonrise
Mon -- 11:46 PM CDT     0.63 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.60.80.91.11.21.31.31.210.80.80.80.80.9111.11.11.110.80.7

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Mon -- 03:15 AM CDT     0.08 feet Low Tide
Mon -- 06:57 AM CDT     Sunrise
Mon -- 10:23 AM CDT     Moonset
Mon -- 07:35 PM CDT     0.47 feet High Tide
Mon -- 08:00 PM CDT     Sunset
Mon -- 10:40 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.20.10.10.10.10.20.20.30.30.40.40.40.40.40.40.40.40.50.50.50.50.40.4

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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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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.