Thursday, March23, 2017 L-36.com


Marine Weather and Tides
South Padre Island, TX

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:28AMSunset 7:44PM Thursday March 23, 2017 3:16 AM CDT (08:16 UTC) Moonrise 3:20AMMoonset 2:35PM Illumination 19% Phase: Waning Crescent; Moon at 25 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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GMZ130 Laguna Madre From The Port Of Brownsville To The Arroyo Colorado- Laguna Madre From The Arroyo Colorado To 5 Nm North Of Port Mansfield Tx- Laguna Madre From 5 Nm North Of Port Mansfield To Baffin Bay Tx- 1039 Pm Cdt Wed Mar 22 2017
Rest of tonight..Southeast winds 10 to 14 knots. A moderate chop on the bay.
Thursday..Southeast winds 12 to 17 knots increasing to 17 to 20 knots in the afternoon. A moderate chop on the bay increasing to choppy in the afternoon.
Thursday night..Southeast winds 17 to 22 knots. Rough on the bay.
Friday..South winds 16 to 21 knots. Choppy on the bay.
Friday night..South winds 14 to 19 knots diminishing to 8 to 12 knots. Choppy on the bay subsiding to a light chop.
Saturday..South winds 7 to 12 knots shifting southeast 10 to 14 knots late in the afternoon. A light chop on the bay increasing to a moderate chop late in the afternoon.
Saturday night..Southeast winds 12 to 15 knots. A moderate chop on the bay.
Sunday..Southeast winds 16 to 21 knots. Choppy on the bay.
Sunday night..Southeast winds 15 to 20 knots. Choppy on the bay.
Monday..Southeast winds 12 to 17 knots. A moderate chop on the bay.
Monday night..Southeast winds 9 to 14 knots. A moderate chop on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 1039 Pm Cdt Wed Mar 22 2017
Synopsis..Surface high pressure over the gulf of mexico will maintain light to moderate southeast winds and moderate seas through tonight. An area of low pressure developing in the plains over the next couple of days will result in a stronger pressure gradient. This will lead to stronger winds and higher seas from Thursday through Monday along the lower texas coastline.

7 Day Forecast for Marine Location Near South Padre Island, TX
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location: 26.11, -97.16     debug


Area Discussion for - Brownsville, TX
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Fxus64 kbro 230616 aab
afdbro
area forecast discussion... Updated
national weather service brownsville tx
116 am cdt Thu mar 23 2017

Discussion Updated for latest aviation discussion below.

Aviation Mostly clear skies and light southeast winds prevail
across deep south texas early this morning. Daytime heating and
strengthening southeasterly low level flow will maintain good low
level mixing later today. Winds around 25 knots with gusts of 30
to 35 knots are possible this afternoon. Southeast winds will
gradually diminish to moderate levels after sunset this evening.

Vfr conditions expected to continue for the next 24 hours.

Prev discussion /issued 838 pm cdt Wed mar 22 2017/
discussion... Updated for latest aviation discussion below.

Aviation... The diurnally driven fair wx sc deck from earlier this
afternoon is dissipating as the sea breeze pushes inland. The
evening bro sounding comes in today with a pretty dry atms with
only some very limited moisture evident at the lowest levels of
the atms. The latest short term forecast soundings show these dry
conditions persisting through the night into early tomorrow
potentially limiting any low cld formation. Daytime heating
and strengthening southeasterly low level flow tomorrow will
maintain good low level mixing. So expectVFR conditions to
continue over the next 24 hours.

Prev discussion... /issued 251 pm cdt Wed mar 22 2017/
short term (tonight through Thursday night):the short term will remain
relatively quiet, though temperatures will continue to run several
degrees above normal. Mid level ridging will lie overhead, shifting
slowly east toward the mississippi river valley. High pressure over
the gulf of mexico will support south southeast winds. Overnight low
temperatures will range from the mid to upper 60s.

The axis of a mid level trough will cross the four corners area
tonight and thurs., with pressure falls developing over the central
high plains. Winds will start out breezy, with eastern sections
becoming windy by afternoon under partly cloudy skies. High temps.

Will be in the mid to upper 80s.

A front will push into central texas Thursday night as the plains
storm system matures. Gulf high pressure will retreat east slightly.

Moderate southeast winds will continue locally under partly cloudy
skies, with low temperatures ranging from the mid 60s to near 70.

Long term (Friday through Wednesday): no significant changes to
the long term forecast this afternoon. Friday will still be
another rather windy day with winds advisories likely needed as
the surface pressure gradient remains strong. Meanwhile, a strong
storm system moving through the panhandle region will bring a
dryline into the western half of the CWA Friday afternoon.

Moisture is still lacking in the mid levels and current thinking
is that precip will be difficult to materialize despite some gulf
moisture pooling along the boundary. The dryline will retreat to
the west Friday night with onshore flow dominate the flow regime.

Even then, there is little moisture return.

The storm system will move east into arkansas and swing up into
the mid west. All the be better dynamics will pass well north of
us, leaving deep south texas under zonal flow. The trailing cold
associated with the system will move into the northern ranchlands,
but will not move through given the lack of forcing and will
quickly move back north. Winds will not be as strong Saturday with
weak low pressure in the region.

By the Sunday, yet another storm system develops in the
southern/central plains, with a tightening pressure gradient and
strong winds possible across the region. This system will rapidly
move east Monday with another cold front nearing deep south
texas. However, long range models do vary on if the front will
stall and then lift north before entering the rgv or if it will
drift into the region through mid week. As such, have brought in
small, but still silent pops given this uncertainty.

Meanwhile, well above normal highs and lows are expected through
the period given the potential for dry air mixing down and
occasional downsloping winds across from the southwest.

Marine:
now through Thursday night: gulf high pressure will continue to
dominate, with a tightening gradient Thursday due to pressure
falls developing in the high plains tonight. Southeast winds will
ramp up to fresh by Thursday. Hence, small craft should exercise
caution conditions will be possible Thursday, with low end small
craft advisory conditions possible Thursday night.

Friday through Monday: a tight surface pressure gradient will
remain in place on Friday with hazardous winds and seas keeping
the need for scas through the day. A brief weakening of the
pressure gradient will allow winds to decrease below sca
threshold, however seas will remain around 7 feet range until
early Saturday. However, the gradient will tighten again for
Sunday into Monday as yet another storm system moves through the
central plains with winds and seas building again.

Bro watches/warnings/advisories
Tx... None.

Gm... None.

This product is also available on the web at:
http://weather.Gov/rgv
63


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi47 min SSE 12 G 14 71°F 1019.1 hPa
PTIT2 - 8779770 - Port Isabel, TX 4 mi47 min SSE 11 G 13 72°F 73°F1018.7 hPa
42044 - PS-1126 TABS J 8 mi137 min SSE 12 G 14 72°F 72°F1019.7 hPa66°F
RLIT2 12 mi47 min SE 15 G 21 74°F1018.7 hPa
PMNT2 34 mi47 min 72°F 77°F1018.7 hPa

Wind History for South Padre Island C.G Station, TX
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G14
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Isabel, Port Isabel-Cameron County Airport, TX10 mi24 minSSE 89.00 miFair70°F66°F87%1018.2 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX20 mi24 minSE 410.00 miFair66°F64°F93%1018.4 hPa

Wind History from SPL (wind in knots)
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Last 24hrSE7S7S10S8S8S9S8W5SW11S14SW13SW8SW6N4E3NE7NE6E4E5E6E4E3E4Calm
1 day agoS8S7S4SW5NW3N3N3N6E4NE4E5E13SE16NW8S4S7S5CalmCalmSE6SE6SE5SE6SE5
2 days agoSE7SE7SE8SE3S5S6S6SW5NW3NW4SW8SW11S20SW16
G21
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G18
S15S18S15S14S10SW9SW8S9S7

Tide / Current Tables for Queen Isabella Causeway (east end), Texas
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Queen Isabella Causeway (east end)
Click for Map
Thu -- 04:20 AM CDT     Moonrise
Thu -- 06:20 AM CDT     0.10 feet Low Tide
Thu -- 07:29 AM CDT     Sunrise
Thu -- 03:17 PM CDT     1.24 feet High Tide
Thu -- 03:35 PM CDT     Moonset
Thu -- 07:41 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.70.60.40.30.20.10.10.20.30.50.70.91.11.21.21.21.21.11.11111

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
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Matamoros
Click for Map
Thu -- 03:21 AM CST     Moonrise
Thu -- 05:37 AM CST     0.01 feet Low Tide
Thu -- 06:30 AM CST     Sunrise
Thu -- 02:25 PM CST     1.16 feet High Tide
Thu -- 02:37 PM CST     Moonset
Thu -- 06:42 PM CST     Sunset
Thu -- 07:56 PM CST     0.90 feet Low Tide
Thu -- 10:23 PM CST     0.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.60.40.20.1000.10.20.40.60.811.11.21.11.1110.90.90.90.90.9

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 Brownsville, TX (4,6,7,8)
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Ground Weather Radar Station Brownsville, 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.