Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Seadrift, 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 6:55AMSunset 6:26PM Saturday February 24, 2018 9:54 PM CST (03:54 UTC) Moonrise 1:05PMMoonset 2:04AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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 Pm Cst Sat Feb 24 2018
Rest of tonight..South wind 10 to 15 knots becoming southeast 5 to 10 knots after midnight, then becoming around 5 knots early in the morning. Bays slightly choppy to occasionally choppy. Patchy fog late in the evening. Areas of fog after midnight. A chance of showers late in the evening. A slight chance of Thunderstorms. Rain showers likely after midnight.
Sunday..Northeast wind 5 to 10 knots. Bays smooth to slightly choppy. Areas of fog in the morning. Patchy fog in the afternoon. Showers likely and a slight chance of Thunderstorms.
Sunday night..North wind 5 to 10 knots. Bays smooth to slightly choppy. A slight chance of Thunderstorms in the evening. A slight chance of showers.
Monday..Northeast wind 10 to 15 knots shifting east in the afternoon. Bays slightly choppy to occasionally choppy.
Monday night..East wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. Areas of fog after midnight. A slight chance of light rain after midnight.
Tuesday..Southeast wind 10 to 15 knots shifting south in the afternoon. Bays slightly choppy to occasionally choppy. Areas of fog in the morning, then patchy fog in the afternoon. A chance of showers in the morning, then a slight chance of showers and Thunderstorms in the afternoon.
Tuesday night..South wind 10 to 15 knots. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms.
Wednesday..South wind 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Bays choppy. A slight chance of showers and Thunderstorms.
Wednesday night..South wind 15 to 20 knots becoming west 10 to 15 knots after midnight. Bays choppy. A slight chance of showers and Thunderstorms.
Thursday..Northwest wind 10 to 15 knots shifting north in the afternoon. Bays slightly choppy to occasionally choppy. A slight chance of showers and Thunderstorms.
Thursday night..North wind 10 to 15 knots. Bays slightly choppy to occasionally choppy.
GMZ200 910 Pm Cst Sat Feb 24 2018
Synopsis for the middle texas coastal waters.. Patchy to areas of fog will occur over the bays and nearshore coastal waters once again tonight through Sunday morning with a continued weak to moderate onshore flow. A frontal boundary moving into south texas will help to increase rain chances through the coastal waters tonight and Sunday. The cold front will eventually move offshore Sunday night, followed by drier air and weak to moderate northeast flow. A weak to moderate northeast flow Monday will return onshore Monday night. Areas of sea fog will likely develop again Monday night and Tuesday as gulf moisture returns. Onshore flow will increase to moderate levels Tuesday into Wednesday as low pressure develops over the southern great plains.

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 250156
afdcrp
area forecast discussion
national weather service corpus christi tx
756 pm cst Sat feb 24 2018

Discussion
Have made some substantial updates to forecast grids tonight with
continued slowing of cold front timing. The front still well
northwest of san antonio and just about to austin at this time.

Model guidance... Including meso models in pretty good agreement
that the front will slowly approach the northwest CWA this evening
and then eventually stall bisecting south texas during the daytime
Sunday as a weak surface low develops along it over the rio grande
plains. The front will eventually pushing toward the coast Sunday
evening but not before temperatures east warm into the mid and
upper 70s.

Will still see upper level energy push across the region tonight
and thus will maintain a slight chance to chance pop late this
evening and increasing pops after midnight.

Have also added fog to the eastern two thirds of the forecast area
overnight where the warm moist airmass will remain in place with
weakening wind speeds at the surface and in near surface layers.

Previous discussion issued 532 pm cst Sat feb 24 2018
discussion...

updated for 00z aviation forecast.

Aviation...

very difficult TAF forecast tonight with a cold front anticipated
to move into the region, but stall somewhere in the vicinity of
both ali and vct site through Sunday morning and into the
afternoon. CIGS will become MVFR for all sites regardless of
frontal position, with the potential for some ifr on the eastern
side of the front. Visbys are questionable and will leave at just
MVFR at this time, but could approach low end MVFR late in the
night. Will also have a potential for thunder at most sites
overnight and again Sunday afternoon for crp. Lrd could see a few
showers through the night, but expect tsra activity to remain
east of here. Frontal boundary should push through to the coast by
around 00z Monday. Wind forecast is best guess with current
guidance, but with the stalled boundary, confidence is low,
especially at vct ali.

Previous discussion... Issued 347 pm cst Sat feb 24 2018
short term (tonight through Sunday night)...

concur with the deterministic GFS nam ECMWF which depict an upper
disturbance to lift across the plains midwest region tonight,
while another system moves across the four corners region srn
rockies tonight, then across the SRN plains Sunday and Sunday
night. Msas depicts a frontal boundary across cntrl tx. Concur
with the deterministic nam GFS which moves the front into the cwa
yet stalls it ne-sw across the ERN srn CWA Sunday afternoon, when
considering the foregoing upper pattern. NAM deterministic depict
above normal pwat values over the CWA in advance of the front. The
combination of copious moisture significant CAPE limited q-vector
convergence and sfc convergence associated with the approaching
frontal boundary should generate at least scattered
showers isolated thunderstorms tonight over the CWA msa. An
increase in coverage and intensity of activity expected Sunday
owing to the quasi-stationary frontal boundary, and increasing
upper forcing associated with an upper jet streak. SPC places much
of the ern CWA in a marginal risk for severe thunderstorms
Sunday. At least strong storms seem likely Sunday afternoon given
nam deterministic 0-6km vertical shear and supercell composite
parameter values along and in advance of the front. Concur with
the nam GFS that the front will move offshore Sunday night, which
is consistent with the movement of the foregoing second upper
disturbance that is predicted to move across the SRN plains.

Marine (tonight through Sunday night)...

anticipate that wind will fall below SCA areawide by 00z, when
the current SCA expires for the SRN bays nearshore and offshore
waters. Expect patchy to areas of fog to develop again over the
bays and nearshore coastal waters tonight through Sunday morning.

Dense sea fog possible tonight when considering SREF output, yet
not highly confident in areas widespread dense sea fog.

Long term (Monday through Saturday)...

extended period begins in the wake of a frontal passage with cool
but not cold temperatures and northerly winds. High pressure
moves quickly eastward allowing setting up return flow once again,
with mild temperatures and increasing moisture Tue wed. Rain
chances Tuesday and Wednesday look to be confined to the north and
northeast parts of the coastal bend, and even those chances are
small given better dynamics across central and east texas. A weak
front moves through late Wednesday, with drier and slightly cooler
weather moving in for the rest of the week.

Temperatures will ride the roller coaster between frontal passages
and return flow, with Wednesday being the warmest day of the week.

Preliminary point temps pops
Corpus christi 68 77 57 72 63 60 70 20 10 20
victoria 64 68 52 74 57 60 70 20 10 20
laredo 65 70 52 73 62 30 30 10 10 30
alice 68 76 54 74 62 50 60 10 10 30
rockport 66 72 56 72 63 70 70 20 10 20
cotulla 60 68 48 76 58 10 20 0 0 30
kingsville 69 78 56 72 62 50 60 20 10 30
navy corpus 66 73 58 71 64 60 70 20 10 20

Crp watches warnings advisories
Tx... None.

Gm... None.

Pz 83... Short term


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDRT2 - 8773037 - Seadrift, TX 0 mi55 min ESE 17 G 20 73°F 73°F1011.8 hPa (+0.7)
AWRT2 13 mi55 min SSE 13 G 18 71°F 72°F1011.9 hPa (+1.2)
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi55 min SSE 15 G 17 69°F 66°F1011.4 hPa (+0.5)
VCAT2 17 mi55 min S 15 G 19 72°F 70°F1011.6 hPa (+0.4)
MBET2 20 mi55 min S 14 G 15 69°F 65°F1010.6 hPa (+0.6)
ANPT2 43 mi55 min SSE 14 G 16 67°F 63°F1010.8 hPa (+1.3)
RTAT2 - 8775237 - Port Aransas, TX 44 mi55 min SSE 12 G 16 69°F 63°F1011.9 hPa (+1.3)
EMAT2 47 mi55 min SE 13 G 17 72°F 72°F1011.6 hPa (+0.4)

Wind History for Seadrift, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX17 mi60 minSSE 107.00 miFair72°F68°F91%1011.8 hPa

Wind History from PKV (wind in knots)
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1 day agoN7N6N7N9N6NE7NE8NE8N5N7NE7E8E8SE10SE14
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2 days agoN16N11N10N9N9N7NE13N10N10NE10N8N10N7N7N5NW8N8N7N7N6N6N7N7N9

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
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Sat -- 02:03 AM CST     Moonset
Sat -- 06:56 AM CST     Sunrise
Sat -- 10:01 AM CST     -0.23 feet Low Tide
Sat -- 01:05 PM CST     Moonrise
Sat -- 06:23 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0-0-0-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0-0-0

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Sat -- 02:03 AM CST     Moonset
Sat -- 06:56 AM CST     Sunrise
Sat -- 09:23 AM CST     -0.34 feet Low Tide
Sat -- 01:04 PM CST     Moonrise
Sat -- 06:23 PM CST     Sunset
Sat -- 08:28 PM CST     0.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.30.20.1-0.1-0.2-0.2-0.3-0.3-0.3-0.3-0.2-0.10.10.20.30.50.60.60.70.70.60.6

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 (22,6,7,8)
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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.