Saturday, July22, 2017 L-36.com


Marine Weather and Tides
Anahuac, 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 6:32AMSunset 8:19PM Saturday July 22, 2017 9:38 PM CDT (02:38 UTC) Moonrise 4:42AMMoonset 6:45PM Illumination 0% Phase: New Moon; Moon at 29 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- 337 Pm Cdt Sat Jul 22 2017
Tonight..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Sunday night..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms in the evening.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Tuesday..South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Tuesday night..South winds 10 to 15 knots. Bay waters slightly choppy.
Wednesday..South winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots. Bay waters smooth.
Thursday..South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Bay waters smooth becoming slightly choppy in the afternoon. A slight chance of showers and Thunderstorms.
Thursday night..South winds 10 to 15 knots. Bay waters slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 337 Pm Cdt Sat Jul 22 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Shower and Thunderstorm coverage has weakened over the waters this afternoon. Onshore flow can be expected this weekend, with increasing wind speeds and a rise in wave heights late Sunday into Monday in response to a tightened onshore pressure gradient. These should weaken by Tuesday as an area of high pressure fills in towards the middle of next week.

7 Day Forecast for Marine Location Near Anahuac, TX
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location: 29.73, -94.7     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 230219
afdhgx
area forecast discussion
national weather service houston galveston tx
919 pm cdt Sat jul 22 2017

Update
Earlier evening convection has dissipated, with northern portions
of harris county receiving anywhere from 1 to up to 3 inches.

Cannot rule out a few more isolated showers and maybe a
thunderstorm or two along the coastal counties and across the
coastal waters tonight as a mid to upper level weakness evident on
evening raobs meanders across the area, but have low confidence
on how far inland this activity will actually push given
increasingly southwest low level flow in response to surface
ridging over the northern gulf. As a result, have lowered rain
chances inland for night while maintaining 20 pops along the coast
and for the waters. Otherwise, made minor updates for hourly
trends with overnight lows in the mid 70s to low 80s.

Huffman

Prev discussion issued 648 pm cdt Sat jul 22 2017
aviation...

a cluster of strong storms over near kiah will end within the
next 30 minutes or so and other than a few showers near kuts and
kcll, not expecting much more precip tonight. The upper low over
the western gulf will meander near the coast tonight into Sunday
and some showers along the immediate coast will be possible toward
sunrise Sunday morning. Daytime heating will trigger another round
of afternoon storms... Impacting mainly the houston terminals and
kcxo and ksgr. Convective temps on Sunday are around 89 degrees
and pw values will reach 2.11 inches by 21z with soundings showing
a weak capping inversion developing near 850 mb but this looks
breakable during peak heating. 43
prev discussion... Issued 351 pm cdt Sat jul 22 2017
discussion...

precipitation not quite as widespread across SE tx this afternoon
likely owing to the extensive clouds and persistent storms
offshore (limiting stability and preventing decent inflow
respectively). While temperatures have been a touch lower than
yesterday, the higher dewpoints are keeping heat index values
elevated (100-106f) so far today.

With the upper low lingering around the coast between gls and lch
through tomorrow am a bit hesitant to lower pops too much... Especially
for our eastern and coastal counties. Progged pws from 2.0 to 2.2
inches do appear supportive of some decent rains tomorrow.

However... Do agree that the main issue with the upcoming forecast
could be the rising heat heat indicies for next week. As this low
washes out, we should see the upper ridge out west begin building
east into the central southern plains. Rain chances will decrease
starting Monday save for some isolated development at or along
the seabreeze. Daytime highs are progged to be in the upper
90s to around 100 for central northern parts of our cwa, and with
dewpoints remaining in the 70s, this could translate to heat
index values at or near our heat advisory criteria of 108
degrees. 41
marine...

the upper level low pressure system is continuing to fill into the
region and aid in the development of showers and thunderstorms this
afternoon. Although coverage this afternoon has diminished in
comparison to this mornings convection, lingering showers and an
isolated thunderstorm or two can be expected over the waters through
the remainder of this evening. Gusty winds can also be anticipated
with these stronger storms. Onshore flow overnight will begin to
increase in wind speed as the pressure gradient tightens over SE tx
Sunday into Monday. Winds should increase to between 10-15 knots
tonight and hold through Sunday. Sunday night into Monday winds
again will pick up in speed and stay closer to 15 knots before
diminishing late morning on Monday. Therefore, we will be flirting
with scec criteria while this tighter pressure gradient holds place.

Seas will also pick up during this time from 2 feet to 2-4 feet. By
Tuesday an area of high pressure begins to build in resulting in a
lowering in wave height and weaker onshore flow. Conditions will
also be drier through next Friday.

Hathaway

Preliminary point temps pops
College station (cll) 77 95 77 98 76 10 30 20 10 10
houston (iah) 79 91 80 96 78 10 50 30 20 10
galveston (gls) 82 88 84 91 82 20 50 20 20 10

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 14


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGPT2 - 8770613 - Morgans Point, TX 15 mi56 min S 8.9 G 13 85°F 88°F1012.7 hPa
RLOT2 - 8770971 - Rollover Pass, TX 18 mi56 min S 6 G 11 84°F 87°F1013.6 hPa
HIST2 19 mi56 min SSW 8.9 G 13 83°F 88°F1013.6 hPa
LYBT2 20 mi56 min S 6 G 8.9 84°F 87°F1012.6 hPa
EPTT2 - 8771013 - Eagle Point, TX 21 mi56 min SW 11 G 14 85°F 90°F1013.2 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 26 mi56 min S 13 G 15 89°F1012.9 hPa
GTOT2 29 mi56 min 86°F
NCHT2 - 8770777 - Manchester, TX 30 mi56 min SSW 8.9 G 12 85°F 86°F1011.8 hPa
GRRT2 31 mi56 min S 9.9 G 12 85°F 91°F1013.2 hPa
SRST2 - Sabine Pass, TX 35 mi38 min SSW 11 G 14 83°F 1014.3 hPa (-0.0)77°F
42035 - GALVESTON 22NM East of Galveston, TX 38 mi108 min S 16 G 18 84°F 87°F3 ft1013 hPa (-1.0)78°F
KXIH 39 mi43 min S 11 G 18 84°F 77°F
PORT2 - 8770475 - Port Arthur, TX 42 mi56 min S 4.1 G 6 81°F 88°F1013.8 hPa
SBPT2 - 8770570 - Sabine Pass North, TX 44 mi56 min S 7 G 9.9 83°F 89°F1015.1 hPa
TXPT2 46 mi56 min S 11 G 15 83°F 88°F1013.9 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX26 mi3.8 hrsS 1310.00 miMostly Cloudy91°F73°F56%1013.2 hPa

Wind History from EFD (wind in knots)
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Last 24hrS9S7S5S3SE3CalmCalmCalmCalmCalmCalmCalmCalmCalmSW4S5S7S3S10S8S8S7S9S13
1 day agoS9S6S6S4S3CalmCalmCalmCalmCalmCalmCalmCalmCalmW5W4W3CalmCalmE4--E8S14SE7
2 days agoSW5S4S4CalmS4Calm--Calm--Calm--CalmCalmNE1W4W5--W4SW5CalmCalmE8SE5S11

Tide / Current Tables for Round Point, Trinity Bay, Galveston Bay, Texas (sub)
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Round Point
Click for Map
Sat -- 02:39 AM CDT     -0.48 feet Low Tide
Sat -- 05:42 AM CDT     Moonrise
Sat -- 06:32 AM CDT     Sunrise
Sat -- 03:47 PM CDT     0.87 feet Low Tide
Sat -- 04:18 PM CDT     1.08 feet High Tide
Sat -- 07:44 PM CDT     Moonset
Sat -- 08:17 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.5-0.3-0.5-0.4-0.20.10.40.70.911.1110.90.90.91.110.90.90.90.90.9

Tide / Current Tables for Point Barrow, Trinity Bay, Texas
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Point Barrow
Click for Map
Sat -- 02:09 AM CDT     -0.52 feet Low Tide
Sat -- 05:42 AM CDT     Moonrise
Sat -- 06:33 AM CDT     Sunrise
Sat -- 11:33 AM CDT     1.22 feet High Tide
Sat -- 03:22 PM CDT     0.99 feet Low Tide
Sat -- 07:45 PM CDT     Moonset
Sat -- 07:51 PM CDT     1.06 feet High Tide
Sat -- 08:18 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.4-0.5-0.5-0.4-0.10.10.40.711.11.21.21.1111111.11.110.80.5

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 (22,6,7,8)
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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.