Tuesday, November21, 2017 L-36.com

Marine Weather and Tides
South Point, 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 5:38AMSunset 5:15PM Tuesday November 21, 2017 1:37 PM CST (19:37 UTC) Moonrise 9:01AMMoonset 8:46PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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 South Point , TX
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location: 12.21, -97.29     debug

Area Discussion for - Brownsville, TX
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Fxus64 kbro 211744
area forecast discussion
national weather service brownsville tx
1144 am cst Tue nov 21 2017

Discussion Updated for latest aviation discussion below.

The rest of the afternoon and evening will continue withVFR
conditions with the passing of some high level clouds. Winds
are expected to diminish around sunset with southeasterly to
variable directions. Attention will then turn to a cold front
during the overnight that will result in cig vis dropping to
MVFR conditions, passing rain showers and a north wind shift.

Confidence remains low at the time of this TAF cycle but ifr
conditions and a few lightning strikes may briefly occur with
heavier rain activity. MVFR conditions continue for Wednesday
morning with low cig at around 2000 feet. The northerly winds
increase with gusts to near 25 knots during Wednesday morning.

62 brady

Prev discussion issued 514 am cst Tue nov 21 2017
discussion... Updated for latest aviation discussion below.

Aviation... Will see some patchy haze fog and ifr CIGS between
12z and 14z this morning mainly over portions of the mid and lower
valley before low level moisture is dissipated by the rising sun.

Vfr conditions will then prevail region-wide until at least 06z
tonight as a dry southwest to west low level flow develops.

Surface winds throughout the day will generally remain at or below
12 knots. Will start to see some MVFR-ifr CIGS develop over the
northern portions of the forecast area after 06z tonight as a cold
front enters the rio grande valley. This front will sweep
southward through the early Wednesday morning hours.

Prev discussion... Issued 322 am cst Tue nov 21 2017
short term (today through Wednesday):northwest flow was in place
aloft over deep south tx early this morning with considerable high
clouds pushing southeast into the region amidst the upper flow.

Temp dew point spreads were closing mainly at the coastal
observation sites due to residual low level moisture and generally
calm winds. Will have to keep an eye on possible haze fog formation
early this morning, however the influx of high clouds from the north
will work to delay inhibit the development of haze fog before

For the rest of today, a shortwave trough riding down the east side
of a strong upper ridge over the southwest us will dig south and
strengthen over the southern plains. The low level flow over the rio
grande valley will turn southwest, then west in the afternoon, in
advance of a strong cold front associated with approaching shortwave
trough. The change in flow, an influx of drier low level air, and
more sunshine will cause high temperatures to rise noticeably above
values that were reached Monday afternoon. Highs today will
generally be in the lower to mid 80s, which will roughly be 6 to 10
degrees above normal.

For tonight, the aforementioned cold front will enter the northern
portion of the forecast area around 3 am then rapidly push south
through the early morning hours on Wednesday. Clouds will increase
across much of the forecast area in advance of the front and
scattered showers with embedded thunderstorms will develop along and
behind the front. Could see some areas pick up a half-inch of precip
tomorrow morning as the front progresses southward... Otherwise not
anticipating any severe weather (large hail or damaging winds) with
any thunderstorms that do develop. Showers and thunderstorms will
diminish through the late morning and afternoon hours as the front
exits the region to the south. Cloud cover, precipitation, and cold
air advection will keep high temperatures Wednesday afternoon
limited to somewhat below normal values ranging from the upper 60s
out west with lower 70s elsewhere.

Long term (Wednesday night through Monday): the long term could
not be any nicer or quieter as all of texas will be in between
a high pressure ridge anchored over the southwest u.S and a low
pressure trough extending over the gulf of mexico to the
midwest ne. This highly amplified mid level pattern will maintain
a dry northwest to north flow over our region through early next
week. At the surface high pressure will stretch from deep south
texas along the gulf coast through Saturday before becoming
reinforced next Sunday and Monday. Models are in good agreement
and consistency with the midlevel and surface features making for
a highly confident forecast. No rain is expected for the long term
with deep layer dry air (layered mean rh below 30 percent)
providing very low humidity days Thursday and Friday. Southeast
winds return for the weekend as surface highs settles to the east
allowing for some limited humidity and clouds to return.

Expect 25-30 degree swings in temperatures Thursday and Friday
as temps start off below normal thanksgiving morning, day and
into Friday morning before returning to near normal Friday
afternoon. Southeast winds next weekend will take temperatures
back above normal with daytime high exceeding 80 degrees. Models
temperatures guidance is all within a few degrees through the next
7 days giving better then average confidence to the going
forecast. Enjoy.

Marine:(today through Wednesday): modest winds seas to prevail
today ahead of a strong cold front slated to move across the waters
late tonight early Wednesday morning. The front will enter the
northern waters around 3 am then rapidly push south through the
early morning hours causing winds to rise solidly into the small
craft advisory range around sunrise Wednesday morning. Waves will
respond to the increase in winds with maximum heights over the outer
waters reaching up to 8 to 10 feet throughout the day on Wednesday.

Instability associated with the front will lead to chances of
showers and thunderstorms over the waters mainly between 4 and 10 am
with chances of precipitation diminishing through the afternoon

Wednesday night through Saturday... Surface high pressure north of
the gulf coast Wednesday night and Thursday will maintain a modest
north wind and higher sea with possible ongoing small craft
advisories for all or portions of the lower texas coast. As the
ridge of high pressure settles along the texas gulf coast late
Thursday afternoon and Friday marine conditions rapidly improve
with fair conditions continuing next weekend.

Bro watches warnings advisories
Tx... None.

Gm... Small craft advisory for winds from 3 am to 6 pm cst Wednesday
for gmz130-132-135.

Small craft advisory from 3 am Wednesday to midnight cst
Wednesday night for gmz150-155-170-175.

This product is also available on the web at:
http: weather.Gov rgv
66 54

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Wind Forecast for Brownsville, TX (14,3,4,5)
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Ground Weather Radar Station Brownsville, TX
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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.