Friday, March24, 2017 L-36.com


Marine Weather and Tides
Oak Island, 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 7:16AMSunset 7:35PM Friday March 24, 2017 5:01 PM CDT (22:01 UTC) Moonrise 4:00AMMoonset 3:17PM Illumination 8% Phase: Waning Crescent; Moon at 27 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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GMZ335 Matagorda Bay-galveston Bay- 431 Pm Cdt Fri Mar 24 2017
.small craft advisory in effect until 10 pm cdt this evening...
Tonight..South winds 20 to 25 knots becoming southwest 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight. A chance of showers and Thunderstorms.
Saturday..Southwest winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon. A chance of showers and Thunderstorms in the morning.
Saturday night..South winds 5 to 10 knots. Bay waters smooth.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds around 10 knots. Bay waters smooth to slightly choppy. A slight chance of showers.
Monday night..South winds 5 to 10 knots becoming southeast after midnight. Bay waters smooth.
Tuesday..East winds 10 to 15 knots becoming southeast in the afternoon. Bay waters slightly choppy.
Tuesday night..Southeast winds 15 to 20 knots. Bay waters choppy.
Wednesday..South winds 15 to 25 knots becoming 20 to 25 knots in the afternoon. Bay waters choppy becoming rough in the afternoon. A chance of showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall.
Wednesday night..South winds 15 to 20 knots decreasing to 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight. A chance of showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 431 Pm Cdt Fri Mar 24 2017
Synopsis for high island to matagorda ship channel out 60 nm.. The moderate to strong onshore winds are expected to slowly diminish this evening ahead of an approaching surface trough of low pressure. This weak front will approach the coastal waters Saturday but is forecast to stall inland. Weaker onshore winds are expected over the weekend.

7 Day Forecast for Marine Location Near Oak Island, TX
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location: 29.71, -94.69     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 242013
afdhgx
area forecast discussion
national weather service houston/galveston tx
313 pm cdt Fri mar 24 2017

Short term
Showers and thunderstorms are continuing to push in from the west,
out ahead of the associated cold front. Still monitoring radar
for severe weather such as gusty winds, hail, and isolated
tornadoes. More details can be found in the most recent afd, which
was specifically a mesoscale/severe weather based discussion.

Long term
Drier conditions can be anticipated for much of Sunday morning
and into the afternoon hours. High temperatures will be in the mid
80s, and the low temperatures should dip into the mid to upper
60s. Overnight Sunday and into Monday morning, another upper level
low swings across the rolling plains and into northern texas. Out
ahead of this system, the pressure gradient tightens resulting in
an increase in wind speed and instability Monday afternoon. This
should help to provide ascent, to sustain some showers out ahead
of the boundary. Larger values of vorticity will be advected into
the northern half of the forecast area along with this system.

Showers will begin to push into the northwestern counties of
southeast texas early Monday afternoon and spread across the
northern counties into the early evening hours. This disturbance
should push off to the northeast by Monday evening. Partly cloudy
skies will prevail along with drier conditions early Tuesday
morning through Wednesday morning.

Another upper level disturbance treks across texas Wednesday
bringing with it another frontal boundary, before eventually sliding
off to the northeast by Wednesday evening. Model guidance such as
the ECMWF and gfs, in the most recent run, are for the most part
in agreement regarding the timing of the front. Around 18z on
Wednesday afternoon, the frontal passage will push into the
western counties of southeast texas and should move out of the
eastern counties by 06z Thursday. Based off the latest model
trends, this system will likely bring better chances for showers
and thunderstorms than the system that is expected to move through
southeast texas this upcoming Monday. What the models are not
agreeing on, are the potential rainfall totals associated with
this system. The 12z run of the GFS is indicating higher
precipitation totals than the 12z run of the ecmwf. Regardless,
forecast soundings show moisture in surplus with precipitable
water values ranging between 1.60 to 1.8 inches, so the occasional
heavier downpour will be possible. The chance of precipitation
should linger through late Wednesday evening.

Dewpoints will fall back into the mid 50s to 60s early Thursday
morning. Partly cloudy skies will begin to thin out Thursday, and
clear skies will prevail Friday and into the beginning of next
weekend. High temperatures will be in the low 80s Thursday and
Friday. Not expecting to see precipitation return to the forecast
until Saturday afternoon as another low pressure system begins to
push in from the west.

Hathaway

Marine
Strong onshore winds ad elevated seas persisting this afternoon out
ahead of the system currently moving into the NW portions of SE tx.

Did not make any significant changes with the previous forecast and
have kept the scec/sca configuration in place for the short-term. A
slightly more relaxed gradient is expected just before the dry line
moves into the region, but seas may be slower to respond. And so no
change with the expiration times of the advisory. Winds shifting to
the w/nw remains possible tomorrow morning for mainly the bays/near
shore waters... But onshore winds should return areawide by tomorrow
night. As the next storm system moves into the central plains... The
tightening pressure gradient will help to increase wind speeds once
again Sun afternoon. Scec (at the very least) may be needed through
sun night. Decreased winds/seas by Mon with the presence of a weak/
stalled frontal boundary over SE tx, with a return of strengthening
winds once again tues afternoon on through late weds as yet another
storm system moves in from the west. 41

Preliminary point temps/pops
College station (cll) 77 58 78 58 84 / 80 50 10 10 10
houston (iah) 80 65 83 61 85 / 50 70 20 10 10
galveston (gls) 78 71 79 70 79 / 20 50 40 10 10

Hgx watches/warnings/advisories
Tx... Wind advisory until 4 pm cdt this afternoon for the following
zones: austin... Brazoria... Brazos... Burleson... Colorado...

fort bend... Jackson... Matagorda... Waller... Washington...

wharton.

Gm... Small craft should exercise caution until 10 pm cdt this evening
for the following zones: galveston bay... Matagorda bay.

Small craft advisory until 10 pm cdt this evening for the
following zones: coastal waters from freeport to the
matagorda ship channel out 20 nm... Coastal waters from high
island to freeport out 20 nm... Waters from freeport to the
matagorda ship channel from 20 to 60 nm... Waters from high
island to freeport from 20 to 60 nm.

Discussion... 08
aviation/marine... 41


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 16 mi44 min SSE 17 G 24 76°F 73°F1014.6 hPa
HIST2 18 mi50 min SSE 11 G 17 76°F 75°F1015.9 hPa
EPTT2 - 8771013 - Eagle Point, TX 20 mi44 min S 23 G 30 74°F 75°F1014.7 hPa
LYBT2 21 mi44 min S 17 G 29 76°F 73°F1013.4 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 24 mi50 min SSE 15 G 17 77°F 71°F
GTOT2 28 mi44 min 75°F 69°F
GRRT2 30 mi44 min S 16 G 21 73°F 75°F1015.2 hPa
NCHT2 - 8770777 - Manchester, TX 31 mi44 min S 15 G 24 76°F 72°F1014 hPa
SRST2 - Sabine Pass, TX 35 mi62 min SSE 19 G 24 73°F 1016.7 hPa (-2.2)68°F
42035 - GALVESTON 22NM East of Galveston, TX 36 mi72 min SSE 18 G 21 72°F 70°F6 ft1015.8 hPa (-1.7)69°F
KXIH 38 mi27 min S 9.9 G 17 77°F 68°F
PORT2 - 8770475 - Port Arthur, TX 42 mi44 min SSE 13 G 22 72°F1016.3 hPa
SBPT2 - 8770570 - Sabine Pass North, TX 43 mi44 min SSE 19 G 24 74°F 73°F1017.5 hPa
TXPT2 45 mi44 min SSE 22 G 26 72°F 71°F1016.5 hPa
LUIT2 49 mi44 min SSE 11 G 16 74°F

Wind History for Rollover Pass, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX26 mi72 minSSE 21 G 3010.00 miMostly Cloudy and Breezy79°F62°F58%1015.2 hPa

Wind History from EFD (wind in knots)
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Last 24hrSE15S14
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1 day agoSE10S11SE10SE8SE7SE5S5S4S3--Calm--SE3SE3SE22SE5SE9SE10SE12S10
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2 days agoS10S13S10S9S7SE4Calm--CalmCalmCalmCalmCalmCalmCalmCalmNE3S2S8CalmCalmCalmS12SE10

Tide / Current Tables for Round Point, Trinity Bay, Galveston Bay, Texas
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Round Point
Click for Map
Fri -- 01:08 AM CDT     0.93 feet Low Tide
Fri -- 03:10 AM CDT     0.96 feet High Tide
Fri -- 04:59 AM CDT     Moonrise
Fri -- 07:17 AM CDT     Sunrise
Fri -- 12:33 PM CDT     0.04 feet Low Tide
Fri -- 04:17 PM CDT     Moonset
Fri -- 07:32 PM CDT     Sunset
Fri -- 09:22 PM CDT     1.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.90.910.90.90.80.70.50.40.20.1000.10.30.50.60.80.91111

Tide / Current Tables for Point Barrow, Trinity Bay, Texas
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Point Barrow
Click for Map
Fri -- 01:44 AM CDT     0.78 feet Low Tide
Fri -- 05:00 AM CDT     Moonrise
Fri -- 06:47 AM CDT     0.86 feet High Tide
Fri -- 07:18 AM CDT     Sunrise
Fri -- 01:04 PM CDT     0.05 feet Low Tide
Fri -- 04:18 PM CDT     Moonset
Fri -- 07:33 PM CDT     Sunset
Fri -- 09:41 PM CDT     0.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.80.80.80.80.90.90.80.70.50.30.100.10.10.30.40.60.80.9110.9

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 Houston/Galveston, TX (18,4,5,8)
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Ground Weather Radar Station Houston/Galveston, 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.