Friday, September21, 2018 L-36.com


Marine Weather and Tides
West University Place, TX

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What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 7:08AMSunset 7:19PM Friday September 21, 2018 10:18 AM CDT (15:18 UTC) Moonrise 4:39PMMoonset 2:56AM Illumination 88% Phase: Waxing Gibbous; Moon at 12 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- 917 Am Cdt Fri Sep 21 2018
Rest of today..Southeast winds around 10 knots. Bay waters smooth to slightly choppy. Isolated Thunderstorms early in the morning. A chance of showers. A chance of Thunderstorms in the afternoon.
Tonight..Southeast winds 10 to 15 knots. Bay waters slightly choppy. A chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Saturday..South winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon.
Saturday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Sunday..Southwest winds around 5 knots. Bay waters smooth. Showers and Thunderstorms likely.
Sunday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Bay waters smooth. Showers and Thunderstorms likely in the morning, then a chance of showers and Thunderstorms in the afternoon.
Monday night..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday..South winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Tuesday night..South winds 5 to 10 knots. Bay waters smooth. 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 917 Am Cdt Fri Sep 21 2018
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore flow will prevail for the next couple days. Winds should diminish this weekend as the pressure gradient relaxes. Deepening tropical moisture and a series of upper level disturbances will bring increased chances of showers and Thunderstorms to the waters today through early next week.


7 Day Forecast for Marine Location Near West University Place, TX
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location: 29.72, -95.36     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 211431
afdhgx
area forecast discussion
national weather service houston galveston tx
931 am cdt Fri sep 21 2018

Discussion
Seeing scattered showers this morning as a weak mid level
disturbance moves across SE texas. The elevated showers
associated with this feature are moving to the northeast with the
mid-level flow, and then there are some isolated showers across
southeast areas that are moving northwest with the low-level flow,
with the latter being driven by some limited heating. I am
expecting a fairly convectively active afternoon with some
additional heating due to low convective temps and ample moisture
in place. Localized amounts of 1 to 3 inches could occur this
afternoon where showers storms move repeated over the same
area(s). Updated the forecast to account for current conditions
and to adjust pops slightly using a consensus of high resolution
models for the rest of today and tonight. Expect MAX temps to
reach the upper 80s across most locations, but could remain in the
mid 80s across NW areas due to the expectation of more persistent
cloud cover. 33

Prev discussion issued 435 am cdt Fri sep 21 2018
discussion...

impulse embedded in the upper trof is currently producing some
-ra across portions of the region this morning. Cloudiness will
delay significant heating early today, but expect sct showers and
tstms do redevelop once we reach the convective temps in the upper
80s later in the day. With deep tropical moisture in place,
localized heavy downpours are possible. Coverage should diminish,
but probably not completely dissipate with the loss of heating
this evening and overnight.

Overall pattern, consisting of a nearby mid & upper trof weakness,
does not change all that much this weekend. A weak frontal boundary
will be sagging into north and central texas and will produce a
focusing mechanism for heavier training precip. There's a wide
variety of model solutions in regards to how far south this
boundary will make it and when. At this time, most currently keep
it north of the forecast area. But as the dayshift noted, this
will more than likely be determined on the mesoscale (cold pool
pushes, etc). So long as it remains to our north, the widespread
threat of flash flooding will be tempered. Keep in mind, however,
that near record high pw's for this time of year (2.2-2.5") will
be pooling over the region, steering flow will be weakening to
<8kt and convective temperatures will fall closer to the 85-87f
range. So even without a well defined trigger or focusing
mechanism, slower moving stronger cells can be efficient
rainmakers. Wpc forecast has an average 1-2" rainfall amounts
today through the weekend, but double+ those amounts can fall in
a short time frame and produce some localized street flooding.

Will keep a close eye on things especially areas that've seen
substantial rainfall in the past few weeks.

Unsettled wx persists into next week with a tropical airmass
remaining in place. Expected fairly good chances of precip each
day... Probably becoming more diurnal in nature (coast at night &
in the morning, afternoon inland). Inverted mid level trof near fl
this morning will be making its way wsw toward the western gulf
coast toward midweek with ridging building in behind it later in
the week. Upper pattern isn't looking quite as favorable for a
late week FROPA as we've been seeing... 47
marine...

generally light moderate onshore winds will prevail the next several
days (as high pressure lingers to the east and a low pressure system
develops to the west). Wind speeds could reach caution levels brief-
ly over offshore waters tonight. However, over the weekend, the over
all gradient should be relaxing as a weak cold front moves into nor-
thern portions of SE tx. This boundary is not expected to make it to
the coast at this time. With the onshore winds persisting, deepening
tropical moisture along with series of upper level disturbances will
lead to unsettled weather for much of next week. 41
aviation...

bands of light rain drizzle will continue to move from west to east
across SE tx through the rest of the morning. At this time, not see-
ing much by way of lower CIGS vis, but MVFR conditions will remain a
possibility. Forecast for the rest of today looks wet unsettled with
the approach of a disturbance from the west. Not that confident with
regard to timing of things, so might keep with the general vcsh vcts
wording for this afternoon early evening. Will be expecting most (if
not all) of this activity to decrease tonight. If skies do clear, we
may have to entertain the possibility of patchy fog for overnight or
early Sat morning timeframe. 41

Preliminary point temps pops
College station (cll) 87 74 86 72 85 50 30 60 60 50
houston (iah) 88 75 87 74 87 50 60 70 50 70
galveston (gls) 88 79 87 78 86 50 60 70 50 60

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 33


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 5 mi30 min 84°F 85°F1014.2 hPa
MGPT2 - 8770613 - Morgans Point, TX 20 mi36 min 85°F 85°F1015 hPa
EPTT2 - 8771013 - Eagle Point, TX 29 mi36 min 84°F 85°F1015.1 hPa
GRRT2 38 mi36 min 85°F 85°F1014.8 hPa
GTOT2 41 mi30 min 85°F 90°F1014.7 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 42 mi36 min 85°F 85°F1014.7 hPa
LUIT2 46 mi30 min 85°F 1014.5 hPa
RLOT2 - 8770971 - Rollover Pass, TX 47 mi30 min 85°F 84°F1015.4 hPa

Wind History for Morgans Point, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John Dunn Helistop, TX2 mi83 minN 08.00 miFair81°F77°F89%1014.6 hPa
Houston, Houston Hobby Airport, TX6 mi85 minSE 410.00 miMostly Cloudy83°F78°F85%1014.9 hPa
Houston, Pearland Regional Airport, TX15 mi85 minSSE 410.00 miFair83°F81°F94%1015.1 hPa
Houston Southwest Airport, TX16 mi83 minSE 310.00 miFair80°F78°F95%1014.9 hPa
Houston Intercontinental Airport, TX17 mi85 minSSE 410.00 miMostly Cloudy81°F80°F97%1014.7 hPa
Houston, Sugar Land Municipal / Hull Field Airport, TX17 mi85 minSE 910.00 miFair84°F79°F85%1014.5 hPa

Wind History from MCJ (wind in knots)
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Last 24hrCalmCalmCalmCalm4CalmCalmCalmCalm4
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CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalm33----Calm3
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2 days ago44CalmCalmCalmCalm3CalmCalmCalm4
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54CalmCalm3CalmCalmCalmCalmCalm

Tide / Current Tables for Houston Ship Channel, Galveston Bay, Manchester, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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GOES Local Image of SouthCentralPlains    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (11,2,3,4)
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Ground Weather Radar Station Houston/Galveston, TX
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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.