Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Guadalupe-Guerra, 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 7:38AMSunset 8:30PM Sunday August 20, 2017 6:46 AM CDT (11:46 UTC) Moonrise 4:31AMMoonset 5:49PM 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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7 Day Forecast for Marine Location Near Guadalupe-Guerra, TX
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location: 20.87, -105.44     debug


Area Discussion for - Brownsville, TX
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Fxus64 kbro 201134 aaa
afdbro
area forecast discussion... Updated
national weather service brownsville tx
634 am cdt Sun aug 20 2017

Discussion Updated for latest aviation discussion below.

Aviation Minor adjustments were made to the previous set of
tafs, specifically to initial conditions.VFR continues to be
anticipated through the next 24 hours with winds increasing and
backing today due to the westward progression of the seabreeze
boundary. Tranquil conditions will persist overnight tonight.

Prev discussion issued 400 am cdt Sun aug 20 2017
short term (today through Monday):water vapor satellite imagery
shows 500 mb low pressure spinning over the eastern gulf of mexico.

Model guidance progs this system to move gradually west across the
gulf of mexico during the short term forecast period, ending up in
the western gulf of mexico by sunset Monday evening. This mid-level
low pressure system will nudge 500 mb high pressure north and west
as it advances. Dry weather will prevail today and tonight over the
inland portion of the bro cwfa, with the only hope for isolated
showers occurring tonight over most of the lower texas coastal
waters. On Monday, isolated showers are possible along and east of
the interstate 69e corridor as the mid-level low approaches and
precipitable water values begin to increase to near 2 inches.

Unfortunately, not enough cloudiness and precipitation will occur
to prevent temperatures from reaching well above normal levels. In
fact, inherited daytime highs and overnight lows were increased by
a degree or two based on observations from the past couple of days.

Long term (Monday night through Saturday): first things first,
harvey has dissipated into an open wave (tropical wave) but
continues to move steadily westward. This wave will continue to be
monitored for regeneration as most global models show the wave
moving into the bay of campeche mid to late next week.

There remains a lot of uncertainty on the chance of rain this
week and especially next Friday and Saturday. Initially the large
upper low to is still indicated by gfs,ecmwf, canadian the GEFS to
drift west across the gulf but stalling just east of the texas
coast Wednesday as it bumps into the la canicula ridge. The upper
low then is shown to weaken Thursday leaving a weak shear zone
over the western gulf going into next weekend. Moisture although
shows some increase it remains limited in depth and content also
with CWA on the west side of the low shear line upper support for
lift is limited. We would have to depend on the sea breeze and
daytime heating to do the lifting. GFS ec guidance remains
reluctant to raise pops above 20 percent Tuesday through Thursday
so no change in the previous forecast with slight chances mainly
along and east of i-69c 281. As we move into Friday and
Saturday globals models are in somewhat agreement with a moisture
surge over south texas as the tropical wave (harvey remnants)
move into the southwest gulf which is reasonable and
climatologicalfavorable for this time of year. As a result, the
rain forecast was left unaltered maintaining chance pops for the
end of next week.

Temperatures to see little variation Tuesday through Thursday from
what has been experienced the last several weeks. With the upper
ridge the dominating feature and the upper low not expected to
move over the region temperatures are likely to remain on the
higher end of guidance. Not until days 6 and 7 would we see a few
degrees drop in highs and lows if the increase in rain chances
materialize.

Marine:(today through Monday): buoy 42020 reported southeast winds
around 12 knots gusting to around 14 knots with seas slightly over
2.5 feet with a period of 4 seconds at 02 cdt 07 utc. Surface high
pressure will produce light to moderate winds and low to moderate
seas for the lower texas coastal waters during the period. Small
craft exercise caution and small craft advisory are not likely to
be needed.

Monday night through through Thursday... A weak pressure gradient
is likely to remain across the western gulf much of next week with
an upper ridge over texas and an upper low moving over the western
gulf keeping the surface features weak. No tropical issues are
anticipated at this time with tropical storm harvey having
dissipated into a tropical wave. Light to moderate onshore winds
and a slow sea state to persist much of next week.

Bro watches warnings advisories None.

This product is also available on the web at:
http: weather.Gov rgv


Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Brownsville, TX (7,2,3,4)
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Ground Weather Radar Station Brownsville, TX
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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.