Friday, June23, 2017 L-36.com


Marine Weather and Tides
Galveston, 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 6:19AMSunset 8:23PM Friday June 23, 2017 3:49 PM CDT (20:49 UTC) Moonrise 4:58AMMoonset 6:59PM 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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GMZ375 Waters From Freeport To The Matagorda Ship Channel From 20 To 60 Nm-waters From High Island To Freeport From 20 To 60 Nm- 331 Pm Cdt Fri Jun 23 2017
.small craft should exercise caution...
Tonight..South winds 10 to 15 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. A slight chance of showers and Thunderstorms after midnight.
Saturday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. A slight chance of showers and Thunderstorms.
Saturday night..Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A chance of showers and Thunderstorms after midnight.
Sunday..East winds 10 to 15 knots. Seas 3 feet. A chance of showers and Thunderstorms.
Sunday night..East winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms in the evening, then a chance of showers and Thunderstorms after midnight.
Monday..East winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Monday night..East winds 10 to 15 knots. Seas 2 to 3 feet. Showers and Thunderstorms likely.
Tuesday..East winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon. Seas 3 to 5 feet. A chance of showers and Thunderstorms.
Tuesday night..Southeast winds 15 to 20 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. A chance of showers and Thunderstorms.
Wednesday..Southeast winds 10 to 15 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. A chance of showers and Thunderstorms.
Wednesday night..Southeast winds 15 to 20 knots. Seas 4 to 5 feet with occasional seas up to 6 feet. 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 331 Pm Cdt Fri Jun 23 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Southerly winds are gradually slackening, and seas are following, but delayed a few hours. For this reason, though the small craft advisory has expired, small craft should continue to exercise caution into tonight. Winds and seas will continue to slowly diminish into the weekend, with periods of moderate onshore flow and elevated seas returning around midweek.

7 Day Forecast for Marine Location Near Galveston, TX
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location: 28.84, -94.35     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 232042
afdhgx
area forecast discussion
national weather service houston galveston tx
342 pm cdt Fri jun 23 2017

Discussion
A hot afternoon is well underway for southeast texas with 3 pm cdt
temperatures in the low to mid 90s inland and heat index values
ranging from 98 to 107. Visible satellite imagery shows a
scattered to broken stratocumulus deck developing around 4500 feet
and spreading south within an area of isentropic lift on the 310 k
surface. Rap guidance shows this area of lift gradually
translating east over the next few hours (likely as the remnants
of cindy pull farther away from the region), allowing at least
some of these clouds to translate towards the south and east with
it. For those areas lucky to get some shade from these clouds,
temperatures may quickly drop 2-3 degrees and provide some relief
from the heat. Otherwise, cannot rule out a stray shower along the
coast or across the far extreme eastern counties through the
remainder of the day but this would be the exception and not the
rule.

Not much cooling is expected overnight with lows only falling into
the mid 70s to low 80s, but rain chances will increase across the
region on Saturday and Sunday as southeast texas remains situated
in a relative upper level weakness between two ridges. Speed
convergence along the coast Saturday will result in scattered
morning showers, with the northern counties seeing a thunderstorm
complex along an approaching (weak) cold front also during the
morning hours. Regional radar mosaic already shows storms
beginning to develop along this cold front across portions of the
low rolling plains and along the red river, with additional
upscale growth into a thunderstorm complex expected through the
remainder of the afternoon and evening hours as the front pushes
south towards the region.

The cold front looks to make a run for the interstate 10 corridor
through the remainder of the morning hours Saturday, stalling
near or north of it as a sea breeze pushes inland during the late
morning and afternoon hours. Daytime heating and the collision of
both of these boundaries is expected to result in the development
of scattered to numerous showers and thunderstorms on Saturday,
with greatest coverage centering wherever the boundaries collide
(likely near interstate 10). Convection should wane with loss of
heating by Saturday evening. Another round of morning showers are
expected on Sunday, with scattered to numerous thunderstorms again
developing with daytime heating and likely focusing along
wherever the remnant frontal boundary (or outflow boundaries from
Saturday's convection) is. The front won't have much of an effect
on temperatures but increased clouds on Saturday and Sunday will
keep temperatures a few degrees cooler than today with highs in
the mid 80s to low 90s.

Similar to what the previous forecast noted, storm motions will
be very slow both days (around 5 knots Saturday, 10 knots Sunday)
and this, combined with precipitable water values 1.8-2 inches,
will result in the threat for locally heavy rainfall and the
potential for some localized flood issues as thunderstorms have
the potential to remain nearly stationary before collapsing. Sref
plumes show forecast rain totals generally in the 1-2 inch range
during this time, but would not be surprised to see some isolated
2-3 inch totals occur given the aforementioned environmental
conditions. Will also have to keep an eye on a gusty wind threat
as well on Saturday. Relative humidity progs show drier air
evident over the northwest gulf on afternoon water vapor imagery
working its way into the region from the south southwest. This
drier air would help enhance evaporational cooling, accelerating
downdrafts and creating the potential for gusty winds in stronger
convection on Saturday.

The region remains under this relative weakness in the upper flow
through the middle of the upcoming week, with mainly daytime
shower and thunderstorm chances inland through mid-week.

Expect these chances to gradually decrease early to mid next week
as 500 mb heights increase and atmospheric moisture content drops
a bit. These increasing mid-level heights and decreasing rain
chances will also result in gradually warming temperatures with
highs increasing to near or slightly above normal (low to mid 90s)
by the end of the next work week.

Huffman

Marine
Winds are slowly diminishing today, and seas should also come
down with them on a bit of a delay. Though winds may not quite be
at the scec threshold, the lag in waves should justify keeping it
in place into tonight. Going into the weekend and early next week,
light to moderate flow is expected, generally onshore. An
approaching front may back winds slightly to more easterly from
Sunday, but will still be generally onshore. Some stronger winds
may be possible mid to late week.

Tides also remain elevated, and astronomical high tide at around
two feet at galveston are not aiding matters. Another chance at
coastal flooding in vulnerable areas around high tide early
tomorrow morning can't be ruled out. Will hold off on another
coastal flood advisory for now to gauge tidal behavior through low
tide and into the upswing towards high tide.

Luchs

Preliminary point temps pops
College station (cll) 77 90 73 87 71 20 40 50 60 30
houston (iah) 78 90 75 87 73 20 70 40 70 40
galveston (gls) 81 88 80 87 78 30 40 20 50 50

Hgx watches warnings advisories
Tx... Heat advisory until 6 pm cdt this evening for the following
zones: austin... Brazos... Burleson... Colorado... Jackson...

washington... Wharton.

Gm... Small craft should exercise caution until 3 pm cdt this
afternoon for the following zones: galveston bay...

matagorda bay.

Small craft should exercise caution until 10 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.

Small craft advisory until 3 pm cdt this afternoon for the
following zones: waters from freeport to the matagorda ship
channel from 20 to 60 nm... Waters from high island to
freeport from 20 to 60 nm.

Small craft should exercise caution until 10 pm cdt this evening
for the following zones: 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... 25


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KXIH 25 mi35 min SW 8 93°F 79°F
42035 - GALVESTON 22NM East of Galveston, TX 27 mi60 min S 9.7 G 14 83°F 83°F4 ft1011.4 hPa (+0.0)81°F
42043 - GA-252 TABS B 31 mi110 min 9.7 G 12 76°F 82°F1011.2 hPa (+0.5)
GTOT2 40 mi50 min 86°F 82°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 41 mi50 min S 8.9 G 12 84°F1011.1 hPa (-0.3)
GRRT2 43 mi50 min SSE 8.9 G 13 85°F 84°F1011.4 hPa (+0.0)
LUIT2 44 mi50 min S 8.9 G 12 86°F 84°F
RLOT2 - 8770971 - Rollover Pass, TX 47 mi50 min S 7 G 9.9 86°F 81°F1011.7 hPa (+0.0)

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
High Island 179A (Apache Corp), LA25 mi75 minSSW 119.00 miFair91°F78°F67%1011.5 hPa

Wind History from XIH (wind in knots)
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Last 24hrW18W13
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1 day agoNE26
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2 days agoE23NE22NE22NE22--NE24NE23NE24NE23NE24NE23
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Tide / Current Tables for Galveston Pleasure Pier, Gulf Of Mexico, Texas (sub)
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Galveston Pleasure Pier
Click for Map
Fri -- 04:14 AM CDT     2.27 feet High Tide
Fri -- 05:59 AM CDT     Moonrise
Fri -- 06:20 AM CDT     Sunrise
Fri -- 09:54 AM CDT     1.61 feet Low Tide
Fri -- 12:37 PM CDT     1.85 feet High Tide
Fri -- 08:01 PM CDT     Moonset
Fri -- 08:22 PM CDT     Sunset
Fri -- 09:20 PM CDT     -0.95 feet Low Tide
Fri -- 09:32 PM CDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.51.11.72.12.32.22.11.91.71.61.61.71.81.81.81.51.20.70.1-0.4-0.8-0.9-0.9-0.6

Tide / Current Tables for Galveston (Pleasure Pier), Texas
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Galveston (Pleasure Pier)
Click for Map
Fri -- 04:45 AM CDT     2.67 feet High Tide
Fri -- 05:59 AM CDT     Moonrise
Fri -- 06:20 AM CDT     Sunrise
Fri -- 10:52 AM CDT     1.54 feet Low Tide
Fri -- 01:47 PM CDT     1.69 feet High Tide
Fri -- 08:01 PM CDT     Moonset
Fri -- 08:22 PM CDT     Sunset
Fri -- 09:32 PM CDT     New Moon
Fri -- 09:32 PM CDT     -0.76 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.21.92.32.62.72.52.321.71.61.51.61.71.71.61.410.5-0-0.5-0.7-0.7-0.5

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 (16,3,4,5)
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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.