Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Seadrift, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:00AMSunset 6:22PM Wednesday February 20, 2019 9:52 AM CST (15:52 UTC) Moonrise 7:48PMMoonset 7:56AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 910 Am Cst Wed Feb 20 2019
.small craft should exercise caution...
Rest of today..North wind 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Bays choppy to occasionally rough.
Tonight..Northeast wind 5 to 10 knots. Bays smooth to slightly choppy. A slight chance of showers after midnight.
Thursday..Northeast wind around 10 knots. Bays slightly choppy. A chance of showers.
Thursday night..Northeast wind 5 to 10 knots shifting east after midnight. Bays smooth. A chance of showers.
Friday..Southeast wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A chance of showers.
Friday night..South wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers.
Saturday..Southwest wind around 15 knots shifting northwest in the afternoon. Bays slightly choppy to occasionally choppy. A slight chance of showers.
Saturday night..North wind 5 to 10 knots. Bays smooth to slightly choppy.
Sunday..Northeast wind 5 to 10 knots shifting east in the afternoon. Bays smooth.
Sunday night..East wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers.
GMZ200 910 Am Cst Wed Feb 20 2019
Synopsis for the middle texas coastal waters.. Showers will be possible over the coastal waters this morning, then drier air will move into the area for this afternoon. The offshore flow will decrease to weak to moderate this afternoon and persist through tonight. Rain chances will return late tonight into Thursday as the boundary returns as a warm front. A weak to moderate northeast wind is expected on Thursday. Rain chances will continue across area waters through the end of the work week and into the weekend. An isolated Thunderstorm or two cannot be completely ruled out Friday afternoon and Saturday ahead of and along a cold front. Weak to moderate northeast winds can be expected Thursday before becoming southerly on Friday. The cold front is expected to push into the area late Saturday. Drier conditions are expected for 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 201141 aaa
afdcrp
area forecast discussion... Updated
national weather service corpus christi tx
541 am cst Wed feb 20 2019

Discussion See aviation section for 12z tafs.

Aviation Isentropic downglide has eroded the low stratus ifr
ceilings over most of the region except for the coastal counties.

The ifr conditions are expected to diminish in the next hour with
vfr ceilings with stratus around 5 kft lingering until 14-15z
over the coastal plains. Then, drier air will move into the area
with mostly clear skies expected for the region through this
evening. Northerly winds will back to northeast for tonight. The
frontal boundary over the northwest gulf of mexico is expected to
return as a warm front into the coastal waters late tonight. Mid
level clouds are expected to increase for the coastal areas
shortly after midnight. Ceilings should lower to MVFR along the
coast by 09z Thursday.

Prev discussion issued 418 am cst Wed feb 20 2019
short term (today through Thursday)...

with the upper trough lifting to the northeast, drier air has
pushed southward out of the edwards plateau. Isentropic downglide
has eroded the stratus over the northern brush country early this
morning. Light rain or drizzle will quickly move eastward through
the coastal waters early this morning. Isentropic downglide in the
285-295k layer will advance toward the coast early this morning
with clearing skies expected before 15z. High pressure building
into the area this morning will provide slightly stronger north
winds with the winds diminishing by this afternoon.

The upper trough will be reinforced by Thursday as energy diving
south will lead to a strong upper low forming over the great basin
Thursday morning. The upper low will be nearly stationary over
southern nevada Thursday while weak impulses in the southwest
flow aloft move out of mexico into south central texas. The
frontal boundary over the northwest gulf today will return as a
warm front on Thursday. Warm air advection over the boundary
will lead to showers forming over the gulf late tonight that will
move toward the coast by daybreak. The low level warm air
advection and isentropic lift will be strongest over the coastal
plains Thursday morning. Rain chances will diminish slightly by
the afternoon as this region of lift along the frontal boundary
moves to the northeast. Went closer to the cooler NAM guidance
over the eastern areas Thursday that will be affected by clouds
and scattered showers.

For tides, tide levels remain above normal but have remained
around 1.5 feet msl along the coast as we approach high tide. The
winds have shifted to more of an offshore flow from the north and
increased slightly this morning. With tide levels falling toward
low tide and stronger north winds, do not expect tide levels to
reach 2 feet msl for advisory criteria. Canceled the coastal flood
advisory.

With northerly flow along the coast, risk for rip currents will
be low today. But winds will shift to northeast for Thursday as the
frontal boundary retreats as a warm front. A moderate risk of rip
currents will exist for beaches of middle texas coast Thursday.

Long term (Thursday night through Tuesday)...

a deepening upper level low pressure system is progged to swing
across the SW CONUS Thu night Fri resulting in a southwest flow
across tx. Embedded short waves and increasing moisture will bring
iso sct convection to the CWA Thu night through Fri night, with the
highest pops across the north and east where the moisture is
deepest. The upper low is progged to lift northeast across the
rockies and toward the plains sat, bringing a cold front through s
tx on sat. An isolated tsra or two are possible, however the chances
are better northeast of the cwa, therefore kept only a mention of
showers for now with the front. Models are in fair agreement with
the timing of the front with the frontal bdry reaching the coast
sat morning between 12z and 15z. Rain chances are progged to end
from west to east sat. Breezy winds and drier air filtering across
the rio grande plains Sat afternoon may lead to elevated fire
weather conditions. Cooler and drier conditions are expected
behind the front Sat night and Sunday, but will be short lived as
onshore flow quickly returns by Sun afternoon. This will usher
moisture dewpoint back across S tx and increase rain chances once
again by Sun night and continuing through Tue with additional
short waves tracking across the area.

Marine...

high pressure pushing into south texas has bumped northerly winds
up to SCA levels over the gulf waters and scec for the bays this
morning behind the front. Small craft advisory is in effect until
16z for the gulf waters. Light precipitation will linger into the
morning hours before diminishing as drier air works its way into
the gulf. The winds will diminish to weak to moderate northeast
for tonight into Thursday with frontal boundary returning as a
warm front on Thursday. Scattered showers will be possible with
the warm front Thursday.

A weak to moderate onshore flow is expected fri, then strengthening
fri night ahead of a cold front. Winds may reach advisory levels fri
night. The cold front is expected to move across the waters sat
morning with a weak to moderate offshore flow developing in its
wake. Onshore flow quickly returns Sunday.

Preliminary point temps pops
Corpus christi 67 54 66 60 76 10 10 30 20 20
victoria 66 49 61 56 74 10 10 40 40 40
laredo 67 49 71 57 77 10 0 10 20 20
alice 68 51 69 58 78 10 10 20 20 20
rockport 65 55 63 58 70 10 20 40 30 30
cotulla 68 45 68 54 73 10 0 10 20 30
kingsville 68 52 68 59 79 10 10 30 20 20
navy corpus 63 57 64 60 73 10 20 40 20 20

Crp watches warnings advisories
Tx... None.

Gm... Small craft advisory until 10 am cst this morning 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.

Tmt 89... Aviation


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDRT2 - 8773037 - Seadrift, TX 0 mi41 min NNW 11 G 15 47°F 56°F1017.2 hPa
AWRT2 13 mi41 min N 12 G 16 48°F 56°F1016.8 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi41 min NNW 16 G 19 47°F 53°F1016.6 hPa
VCAT2 17 mi35 min N 12 G 15 46°F 54°F1017 hPa
MBET2 20 mi41 min N 18 G 21 48°F 64°F1015.2 hPa
RCPT2 - 8774770 - Rockport, TX 32 mi41 min 48°F 1017 hPa
ANPT2 43 mi35 min WNW 16 G 17 48°F 56°F1016.3 hPa
PTAT2 - Port Aransas, TX 44 mi53 min NNW 12 G 14 48°F 58°F1016.6 hPa (+3.2)42°F
RTAT2 - 8775237 - Port Aransas, TX 44 mi41 min NNE 11 G 14 48°F 58°F1017.1 hPa
EMAT2 47 mi35 min NNW 13 G 21 46°F 53°F1015.9 hPa

Wind History for Seadrift, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from PKV (wind in knots)
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Last 24hrNE14NE11N10N12N11
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Tide / Current Tables for Pass Cavallo, Texas
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Pass Cavallo
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Wed -- 03:20 AM CST     1.09 feet High Tide
Wed -- 06:59 AM CST     Sunrise
Wed -- 07:54 AM CST     Moonset
Wed -- 09:17 AM CST     -0.64 feet Low Tide
Wed -- 05:52 PM CST     1.00 feet High Tide
Wed -- 06:19 PM CST     Sunset
Wed -- 07:46 PM CST     Moonrise
Wed -- 09:36 PM CST     0.44 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.911.11.10.80.4-0.1-0.4-0.6-0.6-0.5-0.300.30.60.8110.90.60.50.40.5

Tide / Current Tables for Port O'Connor, Matagorda Bay, Texas
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Port O'Connor
Click for Map
Wed -- 02:44 AM CST     0.53 feet High Tide
Wed -- 06:59 AM CST     Sunrise
Wed -- 07:54 AM CST     Moonset
Wed -- 12:35 PM CST     -0.44 feet Low Tide
Wed -- 06:19 PM CST     Sunset
Wed -- 07:46 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.50.50.50.50.40.20.1-0.1-0.3-0.4-0.4-0.4-0.4-0.3-0.2-00.10.20.20.30.30.3

Weather Map and Satellite Images
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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.
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Wind Forecast for Corpus Christi, TX (10,2,3,4)
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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 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.