Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
Seadrift, TX

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:26AMSunset 7:42PM Wednesday March 22, 2017 7:30 PM CDT (00:30 UTC) Moonrise 2:36AMMoonset 1:36PM Illumination 22% Phase: Waning Crescent; Moon at 25 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- 344 Pm Cdt Wed Mar 22 2017
Tonight..Southeast wind 10 to 15 knots decreasing to 5 to 10 knots after midnight. Bays slightly choppy to occasionally choppy.
Thursday..South wind 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. Bays choppy.
Thursday night..Southeast wind 15 to 20 knots. Bays choppy.
Friday..South wind 15 to 20 knots. Bays choppy. A chance of showers and Thunderstorms.
Friday night..South wind 15 to 20 knots. Bays choppy. A slight chance of showers and Thunderstorms.
Saturday..Southwest wind 10 to 15 knots becoming south around 5 knots in the afternoon. Bays slightly choppy to occasionally choppy.
Saturday night..Southeast wind 5 to 10 knots becoming south 10 to 15 knots after midnight. Bays slightly choppy to occasionally choppy.
Sunday..South wind 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Bays choppy.
Sunday night..South wind 15 to 20 knots. Bays choppy.
Monday..South wind around 10 knots. Bays slightly choppy.
Monday night..Southeast wind around 10 knots. Bays slightly choppy.
GMZ200 344 Pm Cdt Wed Mar 22 2017
Synopsis for the middle texas coastal waters.. Moderate southeast flow is forecast to occur tonight with a moderate to strong flow occurring on Friday. Wind fields will strengthen further Thursday night and Friday...with seas building...as an upper level storm system approaches the central plains. Rain chances increase slightly Friday with the approaching storm system. Winds decrease a bit on Saturday then are expected to become moderate on 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 230024
afdcrp
area forecast discussion
national weather service corpus christi tx
724 pm cdt Wed mar 22 2017

Discussion
Note aviation discussion below regarding the 00z tafs.

Aviation
Vfr this evening followed by a transition to MVFR overnight. A
transition back toVFR conditions expected during the mid/late
morning hours. Onshore sfc wind will decrease to light overnight
yet increase to breezy/windy by late morning/early afternoon
Thursday.

Previous discussion /issued 341 pm cdt Wed mar 22 2017/
short term (tonight through Thursday night)...

mid/upper level ridge axis /currently west of the region/ is prog
to shift east across S tx tonight with a deep trough digging
south across the SW CONUS behind this trough. Result will be an
increase in wind fields across S tx... Resulting in breezy to windy
conditions Thursday and Thursday night.

Cu field currently in place should thin by late this afternoon
with a period of mainly clear skies occurring this evening. A
southerly LLJ of 30 to 35 kts at 925mb /strongest across the w
brush country/ is prog to develop... Which should negate fog
potential overnight. Areas of stratus should also develop once
thermal inversion strengthens overnight. Min temps will continue
to be above normal for this time of year... Generally in the 60s.

Pressure gradient force strengthens Thursday as surface pressures
fall significantly across the southern plains... Resulting in windy
conditions across S tx. There are currently strong indications
that a wind advisory may eventually be required for portions of
the coastal plains for Thursday where the strongest wind speeds
are expected to occur. CU field in the morning should once again
thin in the afternoon. An increase in upper level cloudiness may
occur in the afternoon as h25 jet shifts overnight.

Strong WAA regime prog to occur thurs night as a 45 to 50 kt
southerly LLJ develops across the region as strong trough digs
into the plains. Min temps will struggle to fall much below 70
degrees with the pbl failing to decouple.

Long term (Friday through Wednesday)...

extended period begins with an upper level disturbance moving across
the southern plains. Models are in fair agreement showing lee
cyclogenesis and a surface low pushing across southwest kansas and
into oklahoma, with a dryline extending down into the western brush
country. Moisture is limited to a narrow strip east of the dryline,
but decent upper support should be enough for scattered convection
over generally the northeast quadrant of the cwa. A small threat for
damaging winds or hail exists, and areas east of interstate 37 are
currently included in a marginal risk from spc, but expect the
window of opportunity for such activity to be fairly small this far
south. Marine flow on Friday may be enough to warrant small craft
advisories.

After this impulse passes, dry and warm conditions will resume
through the weekend and into early next week. By next Tuesday or so
another upper disturbance may bring renewed chances for rain, but
timing and strength of that system are still uncertain.

Marine... Moderate SE flow to continue this evening and strengthen
during the day Thursday across area bays... And become strong
nearly areawide Thursday night. Strongest winds during the day
Thursday are expected to be across area bays/waterways from baffin
bay to port aransas and the adjacent nearshore waters near padre
island. Wind speeds are expected to strengthen Thursday night
across nearly all marine areas with high confidence that
sustained wind speeds will exceed 20 knots and that seas will
become hazardous. Thus... Small craft advisories have been issued
for portions of the middle texas coastal waters for Thursday and
Thursday night.

Preliminary point temps/pops
Corpus christi 65 84 70 84 67 / 0 0 10 30 10
victoria 63 83 69 82 66 / 0 0 10 50 20
laredo 66 89 67 91 64 / 0 0 10 10 0
alice 61 90 68 89 64 / 0 0 10 30 10
rockport 70 82 71 81 70 / 0 0 10 30 20
cotulla 65 89 66 89 58 / 0 0 10 20 0
kingsville 63 89 70 87 66 / 0 0 10 20 10
navy corpus 69 81 71 80 69 / 0 0 10 30 20

Crp watches/warnings/advisories
Tx... None.

Gm... Small craft advisory from 7 pm Thursday to 6 am cdt Friday 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 noon Thursday to 6 am cdt Friday for
the following zones: bays and waterways from baffin bay to
port aransas.

Wc/87... Aviation


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDRT2 - 8773037 - Seadrift, TX 0 mi43 min SE 14 G 19 75°F 78°F1018.8 hPa
AWRT2 13 mi43 min SSE 12 G 17 1018.5 hPa
PCNT2 - 8773701 - Matagorda Bay; Port O'Connor, TX 17 mi43 min SE 12 G 14 1018.7 hPa
VCAT2 17 mi43 min SSE 16 G 18 75°F 78°F1018.4 hPa
MBET2 20 mi43 min S 9.9 G 11 73°F 64°F
MAXT2 - Mission-Aransas Reserve, TX 26 mi91 min 12 75°F 1019 hPa (-1.0)67°F
CPNT2 26 mi43 min SSE 13 G 15
RCPT2 - 8774770 - Rockport, TX 32 mi43 min S 14 G 20 74°F 77°F1017.9 hPa
MIST2 43 mi76 min SSE 12 74°F 1019 hPa70°F
RTAT2 - 8775237 - Port Aransas, TX 44 mi43 min SE 8 G 13 73°F 69°F1018.4 hPa
PTAT2 - Port Aransas, TX 44 mi31 min SE 13 G 14 71°F 74°F1018.5 hPa (-0.9)68°F
EMAT2 47 mi43 min SSE 9.9 G 13 1018.7 hPa

Wind History for Seadrift, TX
(wind in knots)    EDIT      (on/off)   Help
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SE11
G15
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G19
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SE15
G20
SE13
G16
SE10
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G14
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G15
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G17
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1 day
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SE11
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G13
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G16
SE13
G18
SE15
SE14
G18
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G17
SE15
G19
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G17
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G17
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G19
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SE15
G20
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SE11
SE12
SE11
SE13
G17
SE16
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G21
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SE17
SE19
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G22
S16
G21
S18
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S17
SE16
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SE17
SE14
G18
SE14
SE17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Lavaca - Calhoun County Airport, TX17 mi36 minSSE 13 G 1610.00 miPartly Cloudy75°F67°F77%1019 hPa

Wind History from PKV (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS6
G15
S12
G16
S10S13S11
G19
S12
G17
S12S11S9
G14
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS12
G18
S13S16
G22
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G20
S18
G23
S18
G24
S18
G23
S12
G21
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S12
2 days agoCalmCalmCalmCalmCalmS9CalmCalmCalmCalmCalmCalmCalmS7S15
G20
S15
G21
S15
G22
S14
G22
S12
G19
S14S14
G17
S13
G17
S10S10

Tide / Current Tables for Seadrift, San Antonio Bay, Texas
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Seadrift
Click for Map
Wed -- 01:03 AM CDT     0.33 feet High Tide
Wed -- 03:35 AM CDT     Moonrise
Wed -- 07:28 AM CDT     Sunrise
Wed -- 09:39 AM CDT     0.15 feet Low Tide
Wed -- 02:35 PM CDT     Moonset
Wed -- 07:39 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.30.30.30.30.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.3

Tide / Current Tables for Port Lavaca, Lavaca Causeway, Matagorda Bay, Texas
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Port Lavaca
Click for Map
Wed -- 03:35 AM CDT     Moonrise
Wed -- 07:27 AM CDT     Sunrise
Wed -- 10:33 AM CDT     0.08 feet Low Tide
Wed -- 02:34 PM CDT     Moonset
Wed -- 07:39 PM CDT     Sunset
Wed -- 09:13 PM CDT     0.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.70.70.60.50.40.30.20.10.10.10.10.20.30.50.60.70.80.90.910.90.9

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 (20,4,5,8)
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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.