Monday, January21, 2019 L-36.com


Marine Weather and Tides
Seabrook, 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 7:13AMSunset 5:49PM Monday January 21, 2019 11:35 AM CST (17:35 UTC) Moonrise 6:37PMMoonset 7:39AM Illumination 99% Phase: Full Moon; 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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GMZ335 Galveston Bay- 921 Am Cst Mon Jan 21 2019
Rest of today..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of sprinkles.
Tuesday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers.
Tuesday night..South winds 5 to 10 knots becoming northwest 20 to 25 knots after midnight. Bay waters smooth becoming rough after midnight. Showers.
Wednesday..North winds 15 to 20 knots. Bay waters choppy. Showers likely in the morning, then a chance of showers in the afternoon.
Wednesday night..Northwest winds 10 to 15 knots becoming north 5 to 10 knots after midnight. Bay waters slightly choppy becoming smooth after midnight.
Thursday..Northeast winds around 5 knots becoming southeast in the afternoon. Bay waters smooth.
Thursday night..South winds around 5 knots becoming northwest after midnight. Bay waters smooth.
Friday..North winds 10 to 15 knots becoming northeast 5 to 10 knots in the afternoon. Bay waters slightly choppy becoming smooth in the afternoon.
Friday night..Southeast winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 921 Am Cst Mon Jan 21 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds will strengthen today in response to deepening low pressure in the lee of the rockies. Moderate to strong onshore winds will prevail tonight through Tuesday morning as the low move east. Winds will relax Tuesday afternoon as a cold front approaches the region. The respite from the stronger winds will be short lived as speeds increase again on Wednesday in the wake of the front.


7 Day Forecast for Marine Location Near Seabrook, TX
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location: 29.61, -94.98     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 211116
afdhgx
area forecast discussion
national weather service houston galveston tx
516 am cst Mon jan 21 2019

Aviation
Onshore winds are expected to strengthen as low pressure over se
co deepens. Low level moisture will increase today beneath a
strong capping inversion. This should yield a sct bkn deck by late
morning over the southern TAF sites. Ceilings will be a mix of
vfr MVFR. At 500 am, satellite imagery shows clouds approaching
the coast and kgls is already showing MVFR ceilings. Other than
the clouds, the other aviation hazard today will strong and gusty
se winds. Winds will not decouple overnight but gusts are expected
to diminish. 43

Prev discussion issued 328 am cst Mon jan 21 2019
discussion...

progressive upper ridge will bring fair weather into Tuesday
afternoon ahead of next cold front pushing across the area late
tue Wed morning. This front will increase rain chances and bring
colder air back into the forecast late Tue into wed. The mid upper
level pattern will transition in the wake of this system as a
longwave trough becomes established over the eastern half of the
u.S.

Near term [today and tonight]...

clear skies today will support gradual warming through the day
after a cold start. Temps should rise out of the lower 30s
through the 40s by late morning before reaching the 60s this
afternoon. Expect clouds will increase through the afternoon with
cloudy to mostly cloudy skies in place tonight as moisture returns
ahead of next weather system, with a slight chance of rain
showers returning to parts of the area later tonight. Higher dew
points and cloudy skies will keep overnight lows in the 50s.

Short term [Tuesday through Wednesday]...

return of modified gulf moisture will increase through the day
tue which will also increase clouds and rain chances. By
afternoon, showers are likely across the north as the surface cold
front moves across norther central tx. Models consistent in
timing of cold front pushing quickly sewd Tue evening and offshore
early Wed morning. While rain is likely along and ahead of the
front, at this time airmass appears too stable for tstms. The
front is expected to push quickly sewd Wed morning gradually
pulling low clouds and rain chances with it during the day. Max
temps will drop 20 degrees behind the front as highs Tue in the
upper 60s north to lower 70s top out in the mid to upper 40s on
wed. Brisk north winds will keep wind chills in the upper 30s for
much of the day wed.

Long term [Wednesday night through Monday]...

clearing skies and diminished winds as surface high pressure
builds in wake of the front will once again bring a light
freeze to a large part of southeast tx Wed night Thu morning.

Have stayed close to the blends with near to subfreezing temps
roughly north and west of i69. Thursday may be the nicest day the
rest of the week (outside of today) with sunny skies and light
winds allowing temps to top off in the upper 50s to around 60
ahead of yet another, weaker, cold front Thu night. Friday will be
another pleasant but cool day with highs near 40 north to the mid
50s south. It gets more interesting on Saturday as both GFS and
euro bring a strong shortwave trough down backside of eastern us
longwave trough. While euro is stronger with this feature, both
models bring some rain chances back to the forecast Saturday,
before pushing quickly ewd by Sunday. MAX temps Sat and Sun should
stay seasonable topping off in the mid 50s north to lower 60s
south, with a bit warmer temps to start the next work week.

Evans
marine...

a light onshore flow will strengthen today and tonight as low
pressure develops deepens over SE co. A scec will be required over
the 0-20 nm waters Mon nite into Tuesday and an SCA will be required
over the 20-60 nm waters. The low will move east on Tuesday and drag
a cold front across the coastal waters late Tuesday night with a
strong offshore flow developing on Wednesday. Another SCA will be
required late tues night into wed. Winds will begin to relax late
Wednesday night into Thursday as high pressure builds into west
texas and moves toward the western gulf. The surface high will be
east of the region by Thursday night but another cold front is
expected to cross the coastal waters by early Friday. Another sca
will be required for the marine area on Friday. High pressure will
settle back into the area with lighter winds expected Friday night.

Water levels are near normal levels and will rise to about 0.5 feet
above normal today as the onshore flow strengthens. 43

Preliminary point temps pops
College station (cll) 62 54 68 38 48 0 20 60 70 40
houston (iah) 62 56 70 41 48 0 20 50 90 60
galveston (gls) 60 59 66 44 50 0 10 30 90 70

Hgx watches warnings advisories
Tx... None.

Gm... Small craft should exercise caution from this evening through
late tonight for the following zones: coastal waters from
freeport to matagorda ship channel tx out 20 nm... Coastal
waters from high island to freeport tx out 20 nm...

matagorda bay.

Small craft advisory from 6 pm this evening to 6 am cst Tuesday
for the following zones: waters from freeport to matagorda
ship channel tx from 20 to 60 nm... Waters from high island
to freeport tx from 20 to 60 nm.

Discussion... 48
aviation marine... 33


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 5 mi41 min ESE 7 G 8.9 53°F 55°F1025 hPa
EPTT2 - 8771013 - Eagle Point, TX 10 mi41 min S 12 G 14 55°F 51°F1025.1 hPa
NCHT2 - 8770777 - Manchester, TX 17 mi41 min SSE 5.1 G 7 54°F 63°F1024.3 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 22 mi41 min SSE 16 G 17 57°F 56°F1024.8 hPa
GRRT2 22 mi41 min SSE 7 G 9.9 56°F 52°F1025.2 hPa
GTOT2 23 mi41 min S 6 G 8 58°F 57°F1024.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi41 min SSE 14 G 16 56°F 1025.2 hPa
HIST2 31 mi41 min SE 6 G 9.9 56°F 53°F1025.5 hPa
KXIH 38 mi40 min SE 12
LUIT2 38 mi41 min SSE 8 G 14 59°F 55°F1025 hPa
42035 - GALVESTON 22NM East of Galveston, TX 40 mi35 min SE 12 G 16 58°F 58°F1025.8 hPa (+0.0)51°F
42043 - GA-252 TABS B 44 mi95 min SSE 14 G 18 58°F1025 hPa (+0.4)
FCGT2 - 8772447 - USCG Freeport, TX 49 mi41 min SSE 9.9 G 12 58°F 57°F1025.4 hPa
FPST2 49 mi41 min SE 12 G 13 58°F 56°F1024.5 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi45 minSSE 1010.00 miMostly Cloudy57°F44°F63%1025.7 hPa
Houston, Pearland Regional Airport, TX15 mi42 minS 9 G 1810.00 miOvercast58°F46°F67%1025.2 hPa
Houston, Houston Hobby Airport, TX16 mi42 minSSE 9 G 1410.00 miOvercast57°F45°F64%1025.2 hPa
John Dunn Helistop, TX23 mi40 minVar 310.00 miOvercast55°F44°F67%1024.4 hPa
Galveston, Scholes Field, TX24 mi43 minSSE 1110.00 miOvercast59°F48°F67%1025.4 hPa

Wind History from EFD (wind in knots)
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Last 24hr----NW7N4NE4N4NE4CalmCalmCalmCalm--Calm--Calm--Calm--CalmCalmNE3NE5E6SE10
1 day agoNW21
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NW18NW10NW10NW11NW10----NW13NW13NW13NW13--NW10NW10
2 days agoS8S11S12S18
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--S11SW12S14
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W9SW5W19
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G31

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Mon -- 07:12 AM CST     Sunrise
Mon -- 07:36 AM CST     Moonset
Mon -- 09:13 AM CST     -2.75 knots Max Ebb
Mon -- 01:52 PM CST     0.00 knots Slack
Mon -- 05:16 PM CST     2.55 knots Max Flood
Mon -- 05:47 PM CST     Sunset
Mon -- 06:36 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.2-0.3-0.3-0.5-1-1.6-2.1-2.6-2.7-2.7-2.4-1.8-10.11.32.22.52.52.11.71.310.6

Weather Map and Satellite Images
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wmap_A
GOES Local Image of SouthCentralPlains    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (12,3,4,5)
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Ground Weather Radar Station Houston/Galveston, 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.