Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Houston, 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 7:11AMSunset 7:39PM Wednesday March 29, 2017 6:07 AM CDT (11:07 UTC) Moonrise 7:30AMMoonset 8:35PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 341 Am Cdt Wed Mar 29 2017
.small craft advisory in effect until 10 am cdt this morning...
.small craft should exercise caution...
Today..South winds 15 to 25 knots. Bay waters choppy. Showers and Thunderstorms. Some Thunderstorms may be severe.
Tonight..South winds 10 to 15 knots becoming southwest after midnight. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Thursday..Northwest winds 15 to 20 knots decreasing to 10 to 15 knots in the afternoon. Bay waters choppy becoming slightly choppy in the afternoon.
Thursday night..Southwest winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Saturday..Southeast winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Bay waters slightly choppy becoming choppy in the afternoon.
Saturday night..Southeast winds around 15 knots. Bay waters slightly choppy to choppy. A chance of showers and Thunderstorms.
Sunday..Southeast winds around 15 knots becoming south in the afternoon. Bay waters slightly choppy to choppy becoming choppy in the afternoon. Showers and Thunderstorms likely.
Sunday night..Southwest winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 341 Am Cdt Wed Mar 29 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Strong southerly winds and rough seas should continue this morning and gradually decrease this afternoon. Seas will be slow to decrease due to the long southerly fetch. Conditions will improve further Thursday as a pacific cold front pushes off the coast. Moderate offshore winds are expected Thursday into Friday but southerly winds will be redeveloping over the weekend.

7 Day Forecast for Marine Location Near Houston, TX
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location: 29.74, -95.33     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 290832
afdhgx
area forecast discussion
national weather service houston/galveston tx
332 am cdt Wed mar 29 2017

Discussion
An upper low pressure trough will move across the state today and
the associated cold front will push across SE texas tonight. A
line of thunderstorms was moving east of the interstate 35
corridor at 3:00 am. The latest models have been a bit slow with
the advent of the storms; although, the latest runs of the hrrr
are fairly close. All the models slow the advance of the line of
storms as they enter into the western counties of the forecast
area. If the storms continue their current trends, expect the line
to reach college station and madisonville by 4:00 am. If it does
not slow down, the line should then reach huntsville, bellville,
and possibly columbus between 5:00 and 6:00 am. All the models
then show the line slowing and probably not reaching metro
houston until sometime between 6:00 am and 9:00 am.

Still looking at a decent environment for at least isolated severe
storms. Main threats are damaging winds and isolated tornadoes
given 0-3 km helicity values are between 300 and 400 ahead of the
line. Other threats include large hail and locally heavy rainfall.

Expect the initial line of storms to move out of the area during
the midday to early afternoon period. The hrrr shows the potential
for additional development later in the afternoon. The actual cold
front will move across the forecast area tonight.

After a cooler day on Thursday, an upper level ridge moving
overhead will set things up for a rather warm Friday. Highs on
Friday will likely reach into the mid 80s.

The progressive flow aloft will bring the next system across se
texas over the weekend and early next week. The best chances for
showers and thunderstorms will be on Sunday and Sunday night.

Isolated to strong to severe storms and locally heavy rainfall
again look to be possible.

40

Marine
Southeast winds of 20 to 28 knots will continue across the upper
texas coast this morning. Seas have become rough with significant
wave heights reaching 6-7ft nearshore and 8-9ft off shore based on
noaa buoys. Winds should decrease later today but due to the long
fetch of southeast winds, seas will remain rough. Small craft
advisory has been extended for the offshore waters until this
evening when seas should drop below 7 feet. A pacific front will
push off the coast thrusday morning allowing for winds to shift to
the northwest. Winds quickly return to the south on Friday and
increase through the weekend. Caution or advisories may be needed
over the weekend. Another pacific front pushes through early Monday
which will shift winds again.

Overpeck

Preliminary point temps/pops
College station (cll) 82 56 77 56 86 / 80 20 10 0 0
houston (iah) 81 61 78 57 86 / 80 40 10 0 0
galveston (gls) 77 66 74 66 78 / 70 50 10 0 10

Hgx watches/warnings/advisories
Tx... None.

Gm... Small craft advisory until 10 am cdt this morning for the
following zones: galveston bay... Matagorda bay.

Small craft should exercise caution from 10 am cdt this morning
through this evening for the following zones: galveston
bay... Matagorda bay.

Small craft advisory until 7 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... 40
aviation/marine... 39


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 4 mi50 min WSW 1.9 G 4.1 74°F 74°F1010.1 hPa
LYBT2 13 mi50 min S 2.9 G 6 74°F 75°F1009.1 hPa
MGPT2 - 8770613 - Morgans Point, TX 19 mi50 min SW 2.9 G 7 74°F 76°F1010.1 hPa
EPTT2 - 8771013 - Eagle Point, TX 28 mi50 min S 13 G 18
GRRT2 38 mi50 min S 9.9 G 13 73°F 75°F1007.3 hPa
GTOT2 41 mi50 min 73°F 73°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 42 mi50 min SSE 17 G 20
RLOT2 - 8770971 - Rollover Pass, TX 46 mi50 min SSE 13 G 15 73°F 75°F1007.8 hPa
LUIT2 47 mi50 min SSE 9.9 G 14 73°F

Wind History for Morgans Point, TX
(wind in knots)    EDIT      (on/off)   Help
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Last
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SE7
G10
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G15
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G14
SE12
G18
SE16
G20
SE12
G16
SE13
G18
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G20
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G23
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G24
SE17
G21
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G23
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G22
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G24
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G22
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G24
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G20
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G24
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G17
S2
1 day
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SE9
G13
S7
G11
S7
G12
S7
G11
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G11
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G13
SE7
G13
SE11
G14
SE12
G16
SE7
G13
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G15
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G16
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G16
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G13
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G12
SE6
G10
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G11
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SE5
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S4
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G9
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G14
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G14
SE11
G16
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G19
SE12
G17
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G15
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G17
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G14
S9
G14
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G12
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G14
S9
S7
G11
S8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John Dunn Helistop, TX4 mi33 minN 08.00 miMostly Cloudy73°F66°F78%1008.5 hPa
Houston, Houston Hobby Airport, TX7 mi15 minSE 310.00 miMostly Cloudy72°F66°F84%1009.3 hPa
Houston / Ellington, TX12 mi78 minSSE 1110.00 miMostly Cloudy73°F68°F83%1007.8 hPa
Houston Intercontinental Airport, TX16 mi15 minSSE 410.00 miMostly Cloudy73°F66°F79%1009.4 hPa
Houston, Pearland Regional Airport, TX16 mi15 minN 09.00 miMostly Cloudy75°F68°F79%1009.6 hPa
Houston Southwest Airport, TX18 mi13 minN 010.00 miMostly Cloudy71°F66°F86%1009.1 hPa
Houston, Sugar Land Municipal / Hull Field Airport, TX19 mi15 minN 010.00 miOvercast74°F68°F82%1008.8 hPa

Wind History from MCJ (wind in knots)
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Last 24hrSE7E6SE7SE8
G15
SE11
G17
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G25
SE11
G22
SE15
G27
SE16
G26
SE19
G32
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G33
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SW3
1 day agoSE7S4S7SW7S5S8
G14
SW11
G19
S6
G14
S3S5
G14
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G14
S8
G18
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G20
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G17
S10SE6SE7SE7SE6SE7SE4SE8SE6
2 days agoSE4SE5SE4SE7S7
G15
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G19
S7
G21
SE18
G23
SE14
G22
SE13
G24
S16
G24
SE14
G18
S17
G25
SE12
G25
S11
G17
S11
G14
SE13SE6SE8CalmS7S7S3SE3

Tide / Current Tables for Houston Ship Channel, Galveston Bay, Manchester, Texas
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Houston Ship Channel
Click for Map
Wed -- 04:47 AM CDT     0.50 feet Low Tide
Wed -- 07:13 AM CDT     Sunrise
Wed -- 08:29 AM CDT     Moonrise
Wed -- 11:42 AM CDT     1.69 feet High Tide
Wed -- 06:02 PM CDT     0.98 feet Low Tide
Wed -- 07:38 PM CDT     Sunset
Wed -- 09:34 PM CDT     Moonset
Wed -- 10:30 PM CDT     1.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.210.80.70.50.50.60.811.31.51.71.71.61.41.31.11111.11.21.31.3

Tide / Current Tables for San Jacinto Battleground State Historic Site, Texas
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San Jacinto Battleground State Historic Site
Click for Map
Wed -- 04:34 AM CDT     0.23 feet Low Tide
Wed -- 07:13 AM CDT     Sunrise
Wed -- 08:28 AM CDT     Moonrise
Wed -- 11:24 AM CDT     1.37 feet High Tide
Wed -- 05:33 PM CDT     0.67 feet Low Tide
Wed -- 07:37 PM CDT     Sunset
Wed -- 09:33 PM CDT     Moonset
Wed -- 10:25 PM CDT     1.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.70.50.40.20.20.40.60.81.11.31.41.41.21.10.90.80.70.70.80.911.11.1

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.