Thursday, June22, 2017

Marine Weather and Tides
Guadalupe-Guerra, 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 7:15AMSunset 8:52PM Thursday June 22, 2017 1:23 PM CDT (18:23 UTC) Moonrise 4:00AMMoonset 5:27PM Illumination 2% 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 221733 aab
area forecast discussion... Updated
national weather service brownsville tx
1233 pm cdt Thu jun 22 2017

Discussion Updated for latest aviation discussion below.

Aviation Vfr conditions are expected the next 24 hours. Main
concern this afternoon will be the extreme heat with temperatures
peaking between 102 and 109 degrees through the mid and lower
valley's. Also, stronger south to southwest winds are developing
and will gusts around 25 knots this afternoon. The pressure
gradient remains strong overnight maintain gusty conditions much
of the overnight hours and becoming reestablished mid to late
morning Friday.

Prev discussion issued 644 am cdt Thu jun 22 2017
discussion... Updated for latest aviation discussion below.

Aviation... A few low clouds can be seen on the horizon this
morning, however beside a few CU clouds near the coastal airports
this morning, skies should be mostly clear. South winds will
increase and become rather gusty through the afternoon and remain
elevated into the evening hours as the pressure gradient
strengthens today.

Prev discussion... Issued 421 am cdt Thu jun 22 2017
short term (now through Friday): the heat continues as the
subtropical ridge of high pressure over the desert southwest west
texas remains in control of the pattern. Meanwhile, TS cindy will
continue to swirl into the texas louisiana border later this
morning. As it does, the impacts to the coastal areas will lessen
through the day. Until then, however, some coastal flooding a
continued high surf will remain in place through the mid morning
hours as tides run a foot and half to up to 2 and a half feet
above predicted levels. Although coastal flooding impacts should
improve through the day, dangerous rip current will continue at
area beach through at least this morning until some of the higher
swells subside. As such, will keep all current headlines products
in place for this morning's forecast package and will allow the
next shift to cancel the rip current statement if conditions
improve by the afternoon.

With the aforementioned strong ridge of high pressure over the
region, dry northwest flow aloft will prevail with subsidence
continuing. Have actually increased high temps a degree or so today
given the records that were shattered yesterday. With 850 temps and
compressional heating, it is likely we will see a near carbon copy
for today with additional records broken. Heat indices will also
range from 105 to near 110 degrees. Overnight lows will not offer
much relief as values will still be several degrees above normal as

Models do indicate that temperatures could be a couple of
degrees cooler now for Friday, but only if some moisture can return
with the southerly flow. Even then temperatures will still range
above the century mark across the the mid to upper valley on Friday.

However, because the slightly cooler highs comes with a trade-off of
increased moisture, heat index values could be near or above 111
degrees across portions of the rgv and heat advisories may be

Long term (Friday night through Wednesday): a 500mb ridge over
the southwest united states and northern mexico will initially
provide subsidence across deep south texas Friday night. An
inverted 500mb trough will develop over the western gulf of mexico
Saturday as a weak cold front moves south across north texas. Low
and mid level moisture will increase across the state with
moisture pooling along a weak frontal boundary and across south
texas this weekend. The combination of the mid level weakness,
daytime heating and abundant moisture will support a chance of
showers and thunderstorms this weekend. The weak frontal boundary
across the region along with the arrival of deeper moisture
(precipitable water values 2.10+ inches) will support better
widespread coverage of rainfall on Monday and Tuesday. Lingering
moisture will allow a chance of showers and thunderstorms to
continue into mid week. Near normal temperatures for the weekend
into early next week due to the increase in cloud cover and rain

Fire weather: fire weather continues to be a concern today as
minimum rh values will range from the upper teens across the western
portions of the zapata and starr counties with to upper 20s towards
the i-69c corridor. Meanwhile, extremely warm day-time highs are
expected which will add to the fire danger threat. However, the
southerly 20-ft winds should remain below critical threshold, with
the exception of near coastal locations. Given that it is unlikely
red flag criteria will be met, will go with an rfd to highlight the
enhanced threat. Winds will be stronger on Friday, however moisture
should be increasing with it. However, if the moisture does not
return as quickly as expected, an enhanced fire weather threat will

Marine (now through Thursday): buoy 42020 is reporting ssw winds at
around 15 knots and seas around 6 feet as of 3 am cdt. Tropical
storm cindy is expected to make land fall near the texas louisiana
border later this morning. Once that occurs, swells should improve
rather quickly. However, the surface pressure gradient will increase
through the day as string southerly flow returns as the tropical low
begins to interact with surface pressure systems over the southern
plains. As such, winds will increase across the laguna madre this
afternoon and a small craft advisory will be needed. The gradient
will cause winds and seas to respond for gulf waters east of padre
island later this evening through at least Friday afternoon. Small
craft advisories will posted for this as well.

Friday night through Monday night... Moderate southeast winds will
prevail along the lower texas coast Friday night as low pressure
across west texas interacts with high pressure across the gulf of
mexico. The pressure gradient will weaken across the western gulf
Saturday as a weak cold front moves into north texas. This will
allow light to moderate southeast winds Saturday to turn to the east
and diminish Saturday night into Sunday as the front moves into
central texas. Light east winds should continue across the lower
texas coastal waters Monday as the front moves into south texas.

Rain chances begin to increase Friday night with better rain chances
expected through the weekend into early next week.

Bro watches warnings advisories
Tx... High rip current risk until 7 pm cdt this evening for txz251-256-

Gm... Small craft advisory for winds until 7 pm cdt this evening for

Small craft advisory from 7 pm this evening to 1 pm cdt Friday
for gmz150-155-170-175.

This product is also available on the web at:
http: weather.Gov rgv
59 99

Weather Reporting Stations
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Airport Reports
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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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GOES Local Image of SouthCentralPlains    EDIT

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 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 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.