Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
San Leon, TX

Version 3.4
What's New / NOTES
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 6:21AMSunset 8:11PM Tuesday May 23, 2017 7:28 PM CDT (00:28 UTC) Moonrise 3:52AMMoonset 4:56PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 Galveston Bay- 322 Pm Cdt Tue May 23 2017
Tonight..West winds 10 to 15 knots becoming north after midnight. Bay waters slightly choppy. Scattered showers and Thunderstorms early in the evening, then numerous showers and Thunderstorms late in the evening. Some Thunderstorms may be severe early in the evening.
Wednesday..Northwest winds 10 to 15 knots. Bay waters slightly choppy.
Wednesday night..West winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth.
Thursday..South winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Bay waters slightly choppy becoming choppy in the afternoon.
Thursday night and Friday..South winds 15 to 20 knots. Bay waters choppy.
Friday night through Saturday night..South winds around 15 knots. Bay waters slightly choppy to choppy.
Sunday..South winds 10 to 15 knots. Bay waters slightly choppy. A slight chance of showers and Thunderstorms.
Sunday night..South 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 322 Pm Cdt Tue May 23 2017
Synopsis for high island to matagorda ship channel out 60 nm.. A cold front will push off the coast tonight with strengthening northerly winds and building seas in its wake (some Thunderstorms developing along and ahead of the front could become strong or severe as they move off the coast this evening). Onshore winds will return early Thursday and quickly strengthen during the day. Elevated winds and seas can be expected from the end of the week on through the upcoming memorial day weekend.

7 Day Forecast for Marine Location Near San Leon, TX
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location: 29.48, -94.92     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 232344
afdhgx
area forecast discussion
national weather service houston galveston tx
644 pm cdt Tue may 23 2017

Aviation
Storms occurring ahead of the cold front will be moving across the
terminals from 00z at kuts to about 04-05z at kgls. A strong
thunderstorm should be east of kcll by 00z; however, more showers
were developing to the west of the site. There is a slight
possibility of a strong or severe storm with gusts in excess of
50 knots and large hail making its way through the sites between
kcxo and khou between 00z and 02z.

Expect the storms to be off the coast by 06z.VFR conditions are
then expected. Breezy winds are expected to then develop after 15z
Wednesday.

40

Prev discussion issued 438 pm cdt Tue may 23 2017
discussion...

surface analysis as of 1 pm cdt showed an approaching cold front
stretching from del rio to waco towards shreveport, with a weak
prefrontal wind shift entering portions of the brazos valley.

Regional radar mosaic this afternoon shows a few cells developing
along and behind the front as it continues to push towards the
southeast. With rap guidance instability increasing ahead of the
approaching boundary and lift overspreading the region from a
passing 90 knot upper jet, expect the severe weather threat to
increase over the next few hours for southeast texas as scattered
thunderstorms continue to develop along the front. Expect the
front to clear the brazos valley late this afternoon, reaching the
houston metro mid-evening, and clearing the coast around midnight
tonight. Steep mid-level lapse rates will result in a large hail
and damaging wind threat (especially if any storms bow out) as the
front progresses southward.

A few showers may linger behind the front tonight before
dissipating as drier air moves into the region, with clearing
clouds and cold air advection behind the front resulting in
cool overnight low temperatures in the mid 50s to mid 60s. Dry
weather will continue through the rest of the week with high
temperatures gradually warming into into the low 90s by Friday as
shortwave ridging translates across the region. Northerly winds
will gradually swing around to the south by Thursday as surface
high pressure slides off to the east, allowing moisture to
gradually return by the beginning of the weekend. A cold front
looks to slide into texas by the beginning of the weekend and
stall at the beginning of next week as an upper low reaches the
great lakes. Will have to keep an eye on the Monday Tuesday
portion of the forecast next week as disturbances overriding this
stalled boundary look to result in a very wet period for the
region.

Huffman
aviation...

a cold front will push off the coast tonight with strengthening
northerly winds and building seas in its wake (some thunderstorms
developing along and ahead of the front could become strong or
severe as they move off the coast this evening). Onshore winds
will return early Thursday and quickly strengthen during the day.

Elevated winds and seas can be expected from the end of the week
on through the upcoming memorial day weekend. Caution flags will
probably be needed, and advisories will be possible. 42
climate...

low temperatures Wednesday morning will be well-below normal for
late may and observations across parts of the brazos valley and
piney woods regions may approach or reach record low temperatures
for may 24. A listing of record low temperatures for may 24 for
the first order climate sites are provided below.

Location record low year
city of houston 54 1892
houston hobby 57 1940
college station 55 1913
galveston 62 1940
huffman

Preliminary point temps pops
College station (cll) 56 82 60 90 73 50 10 0 0 10
houston (iah) 59 83 64 89 74 60 10 0 0 0
galveston (gls) 63 81 73 84 79 60 10 0 0 0

Hgx watches warnings advisories
Tx... None.

Gm... Small craft should exercise caution from 11 pm cdt this evening
through Wednesday morning 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... 14
aviation marine... 40


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EPTT2 - 8771013 - Eagle Point, TX 0 mi47 min SSE 7 G 8 79°F 83°F1007 hPa
GRRT2 12 mi47 min SSE 7 G 11 77°F 80°F1007 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi53 min SSE 11 G 12 80°F1006.6 hPa
MGPT2 - 8770613 - Morgans Point, TX 14 mi47 min ESE 5.1 G 8 80°F 80°F1006.9 hPa
GTOT2 14 mi47 min 78°F 79°F
LYBT2 21 mi47 min NE 6 G 7 77°F 80°F1005.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 22 mi47 min S 6 G 9.9 78°F 81°F1007.4 hPa
NCHT2 - 8770777 - Manchester, TX 25 mi47 min NNE 5.1 G 7 84°F 79°F1007.1 hPa
HIST2 29 mi47 min S 6 G 8.9 78°F 81°F1007.5 hPa
KXIH 30 mi34 min SSE 8 79°F 66°F
LUIT2 30 mi47 min E 8 G 11 77°F
42035 - GALVESTON 22NM East of Galveston, TX 32 mi99 min SE 3.9 G 5.8 76°F 80°F2 ft1008.1 hPa (-0.9)68°F
FCGT2 - 8772447 - USCG Freeport, TX 42 mi47 min SE 7 G 9.9 77°F 82°F1007.5 hPa
SRST2 - Sabine Pass, TX 49 mi29 min NNE 1.9 G 2.9 78°F 1007.6 hPa (-1.2)63°F

Wind History for Eagle Point, TX
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E13
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G23
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SE25
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G31
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SE20
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N11
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SE9
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NE12
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G15
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E22
E14
G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX15 mi37 minSE 910.00 miFair79°F70°F74%1007.3 hPa
Houston / Ellington, TX16 mi39 minSE 510.00 miMostly Cloudy82°F62°F51%1007.4 hPa
Houston, Pearland Regional Airport, TX17 mi36 minS 710.00 miOvercast84°F66°F57%1007.2 hPa
Houston, Houston Hobby Airport, TX22 mi36 minSE 410.00 miMostly Cloudy82°F64°F56%1007.2 hPa

Wind History from GLS (wind in knots)
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Last 24hrN12N10N10N13N11NE7N9NW12NW11NW9NW7N12N11CalmN10N10N10N9N8N11NE9NE8SE10SE9
1 day agoE14NE10NE10NE16
G23
NE14E16
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G26
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G32
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SE19SE15S11
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3SE11S7S7N15
G18
N11N11
2 days agoSE7E7E8SE7SE8SE8SE7SE6E3E8E5SE7E6SE7SE10S9S8E53SE7SE7E4E11NE13

Tide / Current Tables for Eagle Point, Galveston Bay, Texas
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Eagle Point
Click for Map
Tue -- 04:51 AM CDT     Moonrise
Tue -- 06:22 AM CDT     Sunrise
Tue -- 07:57 AM CDT     1.03 feet High Tide
Tue -- 12:11 PM CDT     0.95 feet Low Tide
Tue -- 03:24 PM CDT     0.99 feet High Tide
Tue -- 05:55 PM CDT     Moonset
Tue -- 08:10 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.40.60.70.91111110.911110.90.90.70.60.40.20.1

Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
Click for Map
Tue -- 12:16 AM CDT     0.00 knots Slack
Tue -- 03:19 AM CDT     1.65 knots Max Flood
Tue -- 04:51 AM CDT     Moonrise
Tue -- 06:22 AM CDT     Sunrise
Tue -- 07:11 AM CDT     -0.00 knots Slack
Tue -- 10:29 AM CDT     -0.67 knots Max Ebb
Tue -- 01:36 PM CDT     0.00 knots Slack
Tue -- 02:57 PM CDT     0.27 knots Max Flood
Tue -- 04:14 PM CDT     -0.00 knots Slack
Tue -- 05:54 PM CDT     Moonset
Tue -- 08:09 PM CDT     Sunset
Tue -- 08:48 PM CDT     -1.85 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.61.31.61.61.20.60.1-0.3-0.5-0.7-0.7-0.5-0.20.10.30.1-0.4-0.9-1.5-1.8-1.8-1.7-1.3

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 (20,4,5,8)
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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.