Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Jamaica Beach, 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 7:22AMSunset 7:30PM Tuesday March 19, 2019 6:14 PM CDT (23:14 UTC) Moonrise 5:15PMMoonset 5:38AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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GMZ355 Expires:201903200930;;618497 Fzus54 Khgx 192032 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 332 Pm Cdt Tue Mar 19 2019 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz350-355-200930- Coastal Waters From Freeport To Matagorda Ship Channel Tx Out 20 Nm-coastal Waters From High Island To Freeport Tx Out 20 Nm- 332 Pm Cdt Tue Mar 19 2019
Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet.
Wednesday..East winds 5 to 10 knots. Seas 2 to 4 feet.
Wednesday night..South winds 5 to 10 knots becoming northwest 10 to 15 knots after midnight. Seas 2 to 3 feet.
Thursday..Northeast winds 10 to 15 knots becoming east 5 to 10 knots in the afternoon. Seas 1 to 2 feet.
Thursday night..South winds 5 to 10 knots. Seas 1 to 2 feet.
Friday..East winds 5 to 10 knots becoming southeast in the afternoon. Seas 2 to 3 feet.
Friday night..Southeast winds 5 to 10 knots. Seas 2 to 4 feet. A slight chance of showers and Thunderstorms.
Saturday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers and Thunderstorms.
Saturday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A slight chance of showers and Thunderstorms.
Sunday..Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and Thunderstorms.
Sunday night..South winds 10 to 15 knots. Seas 3 feet. A slight chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 332 Pm Cdt Tue Mar 19 2019
Synopsis for high island to matagorda ship channel out 60 nm.. A moderate easterly flow will continue through tonight. Winds will decrease in advance of a weak cold front expected to cross the coastal waters late Wednesday night. High pressure will settle over the state on Thursday and move east of the region on Friday. Onshore winds will return on Friday and gradually strengthen through the weekend.


7 Day Forecast for Marine Location Near Jamaica Beach, TX
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location: 29.2, -94.99     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 192256
afdhgx
area forecast discussion
national weather service houston galveston tx
556 pm cdt Tue mar 19 2019

Aviation
Vfr ceilings will probably mix out tonight and winds will decouple
between 00-02z. Fcst soundings suggest a mid level deck of clouds
forming between 11-15z but conditions will remainVFR. Winds will
begin to shift to the w-nw on Wednesday afternoon over the
northern TAF sites and will back to the SE over southern taf
sites. A cold front will cross the region tomorrow night and
included a wind shift for kiah for its last six hour period. 43

Prev discussion issued 409 pm cdt Tue mar 19 2019
discussion...

temperatures as of 3 pm are in the upper 60s to low 70s, with dew
points in the mid 30s to 40s. Visible satellite imagery shows the
best cloud cover located over south texas this afternoon, with
cloud decks between 5,000-10,000 feet. These decks will attempt to
build in overnight from the west mainly bringing mid to high
level cloud coverage west of i-45.

Upper-level zonal flow continues through Wednesday morning and an
upper-level ridge builds in by early afternoon. A weak shortwave
slides around this ridge Wednesday afternoon, helping to usher in
a weak frontal boundary. This cold front looks to reach the
northern reaches of the forecast area late Wednesday afternoon
into early Thursday. Cloud cover will build in across our northern
zones Wednesday afternoon with the approach of this system. No
precipitation is anticipated with this front at this time, as most
of the best moisture and lift remains west of east texas as can
be seen in the 1000-500mb relative humidity and 850-700mb
frontogenesis fields. Patchy fog will be possible ahead of the
front north of i-10. The front can be best identified in the
forecast equivalent potential temperature fields, but no big
changes in temperature associated with this front. There will be a
noticeable wind shift, as winds out ahead of this feature
Wednesday will be light and variable turning out of the northwest
behind this boundary. Additionally, dew points do dry out into the
upper 30s and low 40s north of i-10 Thursday.

High pressure builds back into the region Wednesday afternoon. This
surface ridge will stay overhead through Friday morning before
shifting east of the region. This will keep dry weather at play,
with high temperatures in the mid 70s and low temperatures in mid
40s to 50s through the remainder of the week. Onshore flow will
return Friday morning and moisture values will be on the rise.

By early Saturday, pressure falls begin over west texas and the
texas panhandle and a weak boundary will drift through the area.

Precipitation chances will be on the rise Saturday and continue
through the beginning of next week. Forecast soundings show
precipitable water values rising to above one inch by Saturday
afternoon. An unsettled pattern will allow for rounds of showers
and thunderstorms the weekend and into Monday. The next strong
cold front will push through north texas and across oklahoma
Monday morning into the afternoon hours. Winds will be much
stronger behind this feature 850 mb flow out of the northwest
between 25-30 knots.

Hathaway
marine...

a weak area of high pressure over the mid-mississippi valley and
lower pressures over the SW gulf have produced a light to moderate
onshore flow today. Will maintain the rip current statement based on
information from the gls beach patrol. Winds and seas have been a
bit higher than progged by models and will extend the SCA for the 20
to 60 waters through 04z when seas should be below 7 feet. Will also
extend the scec through 03z for the 0-20 nm waters for marginal
winds. A weak area of low pressure will develop later tonight over
the central plains and this feature will move slowly northeast and
eventually drag a cold front across the coastal waters Wednesday
night. Weak high pressure will build into SE tx on Thursday with a
light to moderate offshore flow in the wake of the front. The high
over SE tx will move east on Friday with a southeasterly flow
developing and persisting through Monday. A cold front will cross
the coastal waters Monday evening with a strong offshore flow
developing Monday night into Tuesday.

Fire weather...

a fairly stout low level inversion is again expected tonight. Rh
values will recover from todays minimum values between 30-35
percent. Dry air is expected to remain in place through mid week and
rh values will remain on the low side both Wed thurs. A weak cold
front will cross the area Wednesday night. Transport winds will
remain east tonight but switch to the west by Wednesday afternoon
ahead of a cold front. Transport winds will become n-ne in the wake
of a weak front on Thursday. 43
deer park fire - have examined forecast soundings carefully today
for this area and it looks like mixing heights will not collapse to
the surface but will fall to around 900 feet by 03z and under 600
feet by 06z with a minimal value between 200-400 feet around sunrise
Wednesday. Will continue to monitor amdar soundings to see how well
hrrr rap guidance is doing. Transport winds will generally remain e-
se through Wednesday morning. Transport winds lighten considerably
on Wednesday afternoon and the direction will switch to the w-nw and
the plume could switch directions. Mixing heights on Wednesday
afternoon look similar to today reaching 6000 feet by afternoon.

Conditions look semi-favorable for some fog (mainly w-sw of
houston) late Wednesday night ahead of a weak cold front. 43

Preliminary point temps pops
College station (cll) 47 72 45 72 47 0 10 0 0 0
houston (iah) 48 74 49 74 50 0 0 0 0 0
galveston (gls) 58 67 55 67 57 0 0 0 0 0

Hgx watches warnings advisories
Tx... High rip current risk until 8 pm cdt this evening for the
following zones: brazoria islands... Galveston island and
bolivar peninsula... Matagorda islands.

Gm... Small craft should exercise caution until 7 pm cdt this evening
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.

Small craft advisory until 11 pm cdt this evening 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... 39
aviation marine... 43


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GRRT2 9 mi44 min E 13 G 15 63°F 63°F1022.9 hPa
LUIT2 11 mi44 min E 12 G 15 62°F 1022.4 hPa
GTOT2 13 mi44 min ESE 8.9 G 16 63°F 61°F1022.4 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 18 mi44 min E 13 G 15 1022.4 hPa
EPTT2 - 8771013 - Eagle Point, TX 20 mi44 min ESE 12 G 14 1023 hPa
FCGT2 - 8772447 - USCG Freeport, TX 24 mi44 min ENE 9.9 G 16 65°F 61°F1023 hPa
FPST2 24 mi44 min ENE 15 G 18 63°F 62°F1022.1 hPa
42035 - GALVESTON 22NM East of Galveston, TX 31 mi44 min E 14 G 18 62°F 63°F1023.3 hPa54°F
MGPT2 - 8770613 - Morgans Point, TX 33 mi44 min SE 12 G 15 64°F 63°F1022.7 hPa
RLOT2 - 8770971 - Rollover Pass, TX 33 mi194 min ESE 15 G 17 61°F 66°F1024.1 hPa (-2.0)
NCHT2 - 8770777 - Manchester, TX 39 mi44 min SSE 8 G 13 67°F 67°F1022 hPa
HIST2 42 mi44 min ESE 7 G 11 1022.3 hPa
SGNT2 45 mi44 min ENE 12 G 16 64°F 60°F1021.7 hPa

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX8 mi82 minE 11 G 1810.00 miFair65°F50°F59%1023.2 hPa

Wind History from GLS (wind in knots)
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1 day agoE3NE4CalmCalmCalmCalmN3N3N3N5N5N6NE8NE8NE7NE8NE10NE13E13E14NE12E11NE10
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2 days agoNE3NE4CalmCalmCalmNW5NW5W5NW4NW5N8NE6N8NE10NE10NE9NE12NE11N11N12NE7
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Tide / Current Tables for Jamaica Beach, West Bay, 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
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Tue -- 12:33 AM CDT     -0.27 knots Max Ebb
Tue -- 02:46 AM CDT     0.00 knots Slack
Tue -- 03:03 AM CDT     0.01 knots Max Flood
Tue -- 03:19 AM CDT     -0.00 knots Slack
Tue -- 06:36 AM CDT     Moonset
Tue -- 07:24 AM CDT     Sunrise
Tue -- 09:49 AM CDT     -2.25 knots Max Ebb
Tue -- 01:52 PM CDT     0.00 knots Slack
Tue -- 04:58 PM CDT     1.92 knots Max Flood
Tue -- 06:13 PM CDT     Moonrise
Tue -- 07:29 PM CDT     Sunset
Tue -- 10:54 PM CDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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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Wind Forecast for Houston/Galveston, TX (19,4,5,8)
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Ground Weather Radar Station Houston/Galveston, TX
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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.