Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Clear Lake Shores, 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 7:13AMSunset 5:48PM Thursday January 18, 2018 7:45 AM CST (13:45 UTC) Moonrise 8:16AMMoonset 7:22PM Illumination 3% 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- 329 Am Cst Thu Jan 18 2018
Today..Northeast winds 10 to 15 knots. Bay waters slightly choppy.
Tonight..East winds 5 to 10 knots. Bay waters smooth. A slight chance of showers after midnight.
Friday..East winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers.
Friday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A chance of showers.
Saturday..South winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A chance of showers.
Saturday night..South winds 10 to 15 knots. Bay waters slightly choppy. Patchy fog. A slight chance of showers.
Sunday..South winds around 15 knots. Bay waters choppy. Patchy fog. A chance of showers and isolated Thunderstorms.
Sunday night..South winds 10 to 15 knots becoming northwest near 15 knots. Bay waters choppy. A chance of showers and isolated Thunderstorms.
Monday..North winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..North winds 5 to 10 knots. Bay waters smooth.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 329 Am Cst Thu Jan 18 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Winds will gradually veer to the southeast by Friday as high pressure moves away from the region. Winds will increase offshore and seas will build. Small craft advisories may be required as early as Friday well offshore. Chances of rain will increase going into the weekend. In between periods of precipitation, expect sea fog to develop late Friday as warmer air moves over the cold shelf waters. The fog threat will persist into Sunday evening when the next cold front is forecast to push off the coast.

7 Day Forecast for Marine Location Near Clear Lake Shores, TX
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location: 29.55, -95     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 180933
afdhgx
area forecast discussion
national weather service houston galveston tx
333 am cst Thu jan 18 2018

Discussion
The hard freeze warning remains in effect until 9 am this morning
for counties mainly along and north of interstate 10 where 3 am
temperatures are in the mid teens to lower 20s. To the south of
these spots, temperatures are generally ranging from the mid to
upper 20s inland to the low to mid 30s at the coast. Cloud cover
that has been making slow progress to the northeast across our
area is partly associated with the slow moving far west texas area
mid upper level low. These clouds will likely keep high temperatures
in the low to mid 40s across a majority of the area today, and will
probably keep tonight's Friday morning's low temperatures mostly
in the 30s. Expect to see increasing rain chances mainly Friday
and Friday night as the low moves eastward across the state. Will
adjust these rain chances (and gain a little more confidence) over
the next day or two as models hopefully come into better agreement
with the location strength movement of the low. We are more confident
with the temperature forecast that becomes significantly warmer
(highs in the 50s Friday, in the 60s 70s Saturday and mostly in
the 70s on Sunday) as south to southeast winds return to the area
and strengthen. Look for increasing shower and possible thunderstorm
chances Sunday and Sunday night associated with the approach and
passage of a pacific cold front. Will continue to keep the first
half of next week dry with temperatures mainly near normal. 42

Marine
As surface high pressure moves away, a coastal trof will develop
along the tx coast. Winds will veer to the NE & E today and
eventually from the E to SE Friday. The pressure gradient will
tighten so wind speeds will increase and seas will build offshore.

May need small craft advisories in the 20-60nm group as early as
Friday.

The cold water temps closer to the coast will limit onshore wind
speeds, but with a warmer airmass moving overhead we do expect to
see some sea fog development by Friday evening in between periods of
precipitation going into Saturday. The sea fog will remain a threat
until the next front (and probably line of showers tstms) Sunday
night. Moderate offshore winds in its wake may require caution advsy
flags into Monday. 47

Aviation
6000-7000ft ceilings will be moving into the region from the
southwest today. They'll lower overnight and to 2500-4000ft by
sunrise Friday. Areas of rain should move into the southern parts of
the region Friday, but mostly beyond the time covered by the
upcoming 12z tafs. 47

Preliminary point temps pops
College station (cll) 42 30 52 46 67 10 10 30 40 20
houston (iah) 43 34 53 52 71 10 10 30 40 30
galveston (gls) 42 41 55 52 66 10 10 50 50 30

Hgx watches warnings advisories
Tx... Hard freeze warning until 9 am cst this morning for the
following zones: austin... Brazos... Burleson... Chambers...

colorado... Grimes... Harris... Houston... Liberty... Madison...

montgomery... Polk... San jacinto... Trinity... Walker...

waller... Washington.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 6 mi52 min ENE 15 G 18 30°F 39°F1035.2 hPa
MGPT2 - 8770613 - Morgans Point, TX 9 mi52 min ENE 11 G 12 46°F1035.4 hPa
GRRT2 18 mi52 min NNE 14 G 17 32°F 40°F1035 hPa
NCHT2 - 8770777 - Manchester, TX 19 mi52 min NE 4.1 G 5.1 27°F 51°F1034.6 hPa
GTOT2 20 mi52 min NE 8 G 12 31°F 46°F1034.7 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 20 mi52 min NNE 15 G 18 44°F1034.2 hPa
RLOT2 - 8770971 - Rollover Pass, TX 26 mi52 min NNE 7 G 8 27°F 41°F1035.6 hPa
HIST2 32 mi52 min W 5.1 G 7 25°F 44°F1036.2 hPa
LUIT2 33 mi52 min NE 14 G 17 34°F 46°F1033.8 hPa
KXIH 36 mi31 min E 15 G 20 36°F 27°F
42035 - GALVESTON 22NM East of Galveston, TX 38 mi116 min NNE 9.7 G 14 35°F 51°F3 ft1034.8 hPa (+0.5)27°F
FCGT2 - 8772447 - USCG Freeport, TX 45 mi52 min N 11 G 14 33°F 47°F1034.3 hPa

Wind History for Eagle Point, TX
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE12
G19
NE17
NE14
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N17
G25
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G18
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N12
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G16
NE14
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2 days
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SE5
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N10
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G16
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G25
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N19
G26

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX10 mi1.9 hrsNNE 410.00 miMostly Cloudy28°F17°F64%1035.6 hPa
Houston, Pearland Regional Airport, TX13 mi53 minNE 510.00 miOvercast29°F21°F72%1035.5 hPa
Houston, Houston Hobby Airport, TX16 mi53 minNE 710.00 miOvercast28°F21°F75%1035.5 hPa
Galveston, Scholes Field, TX21 mi54 minNNE 1310.00 miOvercast32°F18°F56%1035 hPa
John Dunn Helistop, TX24 mi71 minNE 710.00 miOvercast28°F14°F55%1034.5 hPa

Wind History from EFD (wind in knots)
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Last 24hrN8N9N12N9N11N6N10NE7N5NW3CalmN5N6N4N4--CalmNE3--NE3--N4--N4
1 day agoN14
G22
N14
G25
N13N18
G24
N14
G25
N12
G22
NW10
G20
N15
G25
N3N3N3N3N3N3N5N4N4N4N9N12
G18
N10N10N7N8
2 days agoCalmCalmE4SE8--SE8S7SE8E12E12E9--E8E7E7E8E6E9E4N3N12NW16
G22
NW14
G19
N16
G24

Tide / Current Tables for Clear Lake, Harris Co. Park, Texas
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Clear Lake
Click for Map
Thu -- 12:49 AM CST     0.42 feet High Tide
Thu -- 05:53 AM CST     0.32 feet Low Tide
Thu -- 07:15 AM CST     Sunrise
Thu -- 08:16 AM CST     Moonrise
Thu -- 09:16 AM CST     0.39 feet High Tide
Thu -- 05:16 PM CST     -0.52 feet Low Tide
Thu -- 05:46 PM CST     Sunset
Thu -- 07:22 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.40.40.30.30.30.40.40.40.30.2-0-0.2-0.4-0.5-0.5-0.5-0.4-0.3-0.10.10.3

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Thu -- 07:13 AM CST     Sunrise
Thu -- 08:14 AM CST     Moonrise
Thu -- 10:06 AM CST     -1.69 knots Max Ebb
Thu -- 02:38 PM CST     0.00 knots Slack
Thu -- 05:45 PM CST     Sunset
Thu -- 06:15 PM CST     1.84 knots Max Flood
Thu -- 07:21 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.4-0.6-0.7-0.7-0.8-1-1.2-1.4-1.6-1.7-1.6-1.5-1.1-0.50.31.11.61.81.81.61.30.90.6

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 (8,2,3,4)
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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.