Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Shoreacres, 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 6:49AMSunset 5:23PM Tuesday November 21, 2017 6:05 AM CST (12:05 UTC) Moonrise 9:22AMMoonset 8:06PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 326 Am Cst Tue Nov 21 2017
.small craft advisory in effect from this evening through Wednesday morning...
Today..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and isolated Thunderstorms.
Tonight..Northeast winds 15 to 20 knots increasing to 20 to 25 knots after midnight. Bay waters choppy becoming rough after midnight. A slight chance of showers and isolated Thunderstorms.
Wednesday..North winds 15 to 25 knots becoming 15 to 20 knots in the afternoon. Bay waters choppy.
Wednesday night..North winds 10 to 15 knots. Bay waters slightly choppy.
Thursday..North winds 5 to 10 knots. Bay waters smooth.
Thursday night..Northeast winds 5 to 10 knots. Bay waters smooth.
Friday..East winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Friday night..Southwest winds 5 to 10 knots. Bay waters smooth.
Saturday..Southwest winds around 5 knots becoming south in the afternoon. Bay waters smooth.
Saturday night..Northwest winds around 5 knots becoming north after midnight. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 326 Am Cst Tue Nov 21 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Onshore winds are expected to continue with high pressure east of the area. Scattered showers and Thunderstorms will be possible across the coastal waters ahead of a cold front. Winds will increase quickly behind the front, and a small craft advisory is in effect for the marine areas for late tonight into early Wednesday. Conditions are expected to improve by Thursday with a light onshore flow becoming established by Friday.

7 Day Forecast for Marine Location Near Shoreacres, TX
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location: 29.64, -94.99     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 211016
afdhgx
area forecast discussion
national weather service houston galveston tx
416 am cst Tue nov 21 2017

Discussion
Evening upper air analysis showed southeast texas located in
between two mid-level disturbances, one located over louisiana and
a second located over the texas panhandle. Mid to high clouds
associated with this secondary disturbance are evident streaming
over the region on early morning goes-16 infrared imagery with a
second, lower level of clouds building into the region as moisture
gradually returns from the gulf. In addition to these lower
clouds, signs of this moisture return is also evident with the
isolated to scattered showers developing across the coastal waters
this morning along a coastal trough axis of surface convergence
stretching from freeport southwest towards brownsville.

As southwesterly low-level flow pushes this surface boundary up
the texas coast through the day and nudges inland, shower
coverage is expected to expand across the coastal waters and move
into areas east of a palacios to huntsville line this morning.

Increasing instability as a result of mid-level cooling from the
approach of the panhandle shortwave trough as well as a 60-80 knot
upper level jet nosing into the northwestern gulf today should
provide favorable conditions for thunderstorms to also develop
along the boundary. 00z convection allowing models (cams) have a
fairly consistent signal for scattered showers and thunderstorms
to develop this morning with what appears to be a thunderstorm
complex developing somewhere across the eastern waters later this
afternoon. Have increased rain chances for the marine areas as a
result and pulled the isolated thunderstorm mention farther inland
east of a freeport to houston to livingston line. 0-6 km bulk
shear values over the waters increase to 25-30 knots this
afternoon and have concerns that this may result in enough
organization for a few strong or severe thunderstorms over the
coastal waters today. Marine forecast soundings show a fairly
persistent dry layer of air between 700-500 mb with evaporative
cooling within this layer promoting lower freezing levels and at
least a small hail threat within stronger thunderstorms over the
waters this afternoon into this evening before the thunderstorms
push east towards coastal louisiana. If the thunderstorm complex
the cams have shown does develop, rain chances farther inland
today may be much lower than the 20-40 percent currently
advertised as the coastal storms rob southeast texas of better
moisture inflow.

A cold front located across the northern plains early this morning
will continue to trudge south during the day today, reaching the
brazos valley this evening, houston metro around midnight, and
pushes off the coast by sunrise Wednesday. Weak convergence along
the front may produce a few showers as it sweeps across the region
this evening and tonight with relatively drier and cooler air
being ushered back into the region behind it. Highs today in the
70s will be replaced by highs in the 60s tomorrow with dry
conditions again resuming across the region on Wednesday as north
flow aloft becomes established in the wake of today's shortwave
trough.

The weather on thanksgiving will certainly be something to give
thanks for as dry north flow aloft persists and results in sunny
skies and highs in the mid to upper 60s. North flow aloft becomes
more of a northwest flow aloft on Friday as a northern stream
shortwave trough dives across the great lakes towards the mid-
atlantic states and upper ridging builds in from the west.

Temperatures will gradually warm back into the mid 70s to near 80
by Saturday as ridging spreads eastward, but the northern stream
disturbance looks to send a weak cold front into the region late
Saturday into Sunday and moderate temperatures a few degrees by
the end of the weekend. With the region remaining closed off from
the gulf through the end of the week, expect the frontal passage
to be dry. Upper ridging continues to build across texas during
the late weekend and into early next week with temperatures again
warming back into the mid to upper 70s.

Huffman

Marine
Light onshore flow will persist today with high pressure over the
eastern us and low pressure over the southern plains. A cold
front will cross the coastal waters this evening and usher in a
strong offshore flow. Nne winds will increase to 20-25 kts with
gusts approaching gale force over the gulf waters. A small craft
advisory is in effect for tonight into early Wednesday and a gale
watch warning may yet be required for the offshore waters as gusts
may frequently gust in excess of gale force. A moderate offshore
wind will persist Wednesday night and a scec will be needed. Winds
will decrease on Thursday as high pressure settles over S tx. The
high pressure will move east of the area on Friday and onshore
winds will return. Another cold front will cross the region
Saturday night with moderate offshore winds in the wake of the
front on Sunday.

43 22

Preliminary point temps pops
College station (cll) 74 51 61 36 66 10 20 10 0 0
houston (iah) 74 56 65 40 66 30 20 10 0 0
galveston (gls) 75 61 67 50 64 40 30 10 0 0

Hgx watches warnings advisories
Tx... None.

Gm... Small craft advisory from 11 pm this evening to 11 am cst
Wednesday 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... Galveston
bay... Matagorda bay... 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... 14
aviation marine... 43 22


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 3 mi47 min ENE 4.1 G 5.1 63°F 68°F1013.4 hPa
EPTT2 - 8771013 - Eagle Point, TX 12 mi53 min ESE 1 G 2.9 65°F 63°F1013.2 hPa
NCHT2 - 8770777 - Manchester, TX 16 mi47 min NW 1.9 G 4.1 60°F 70°F1012.9 hPa
GRRT2 24 mi47 min 65°F 63°F1013.1 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 24 mi53 min SE 12 G 14 67°F1012.6 hPa
GTOT2 25 mi47 min 68°F 69°F
RLOT2 - 8770971 - Rollover Pass, TX 27 mi47 min SE 13 G 16 67°F 63°F1012.9 hPa
HIST2 32 mi53 min ESE 5.1 G 7 66°F 66°F1013.3 hPa
LUIT2 40 mi65 min 69°F
KXIH 40 mi30 min SSW 15 70°F 61°F
42035 - GALVESTON 22NM East of Galveston, TX 42 mi75 min SE 18 G 19 70°F 71°F3 ft1012.5 hPa (-2.2)63°F

Wind History for Morgans Point, TX
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SW3
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi75 minN 010.00 miMostly Cloudy63°F59°F88%1013.9 hPa
Houston, Houston Hobby Airport, TX15 mi72 minN 010.00 miOvercast61°F60°F97%1013.6 hPa
Houston, Pearland Regional Airport, TX16 mi72 minN 010.00 miOvercast64°F61°F90%1013.4 hPa
John Dunn Helistop, TX22 mi70 minN 010.00 miMostly Cloudy61°F55°F83%1013.2 hPa

Wind History from EFD (wind in knots)
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Last 24hrNE4NE5NE5NE7E9E9E7E8E8E8E10E9E4E3E4E3CalmE3NE3--Calm--CalmCalm
1 day agoN12N12
G23
N15----N14N7N11NW11NW6NW6N5--N4N4N4E3CalmCalmNE3------NE3
2 days agoS8S4S5SW10SW13
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SW15SW14W14W10W9NW13
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G17

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Tue -- 12:39 AM CST     1.38 feet High Tide
Tue -- 06:49 AM CST     Sunrise
Tue -- 09:21 AM CST     Moonrise
Tue -- 03:29 PM CST     -0.22 feet Low Tide
Tue -- 05:21 PM CST     Sunset
Tue -- 08:06 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.41.31.31.21.21.110.90.80.60.40.20-0.1-0.2-0.2-0.100.30.50.811.2

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Tue -- 12:13 AM CST     -0.00 knots Slack
Tue -- 06:47 AM CST     Sunrise
Tue -- 09:20 AM CST     Moonrise
Tue -- 10:32 AM CST     -1.85 knots Max Ebb
Tue -- 03:04 PM CST     0.00 knots Slack
Tue -- 05:21 PM CST     Sunset
Tue -- 06:44 PM CST     1.98 knots Max Flood
Tue -- 08:06 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.2-0.4-0.6-0.6-0.7-0.8-1.1-1.4-1.7-1.8-1.8-1.7-1.3-0.8-0.10.71.51.921.81.51.10.7

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 (7,2,3,4)
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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.