Friday, July28, 2017

Marine Weather and Tides
Port Isabel, 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 6:53AMSunset 8:19PM Friday July 28, 2017 11:52 AM CDT (16:52 UTC) Moonrise 11:03AMMoonset 11:13PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 1032 Am Cdt Fri Jul 28 2017
Rest of today..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay increasing to a moderate chop in the afternoon.
Tonight..South winds 10 to 15 knots. A moderate chop on the bay.
Saturday..South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. A light chop on the bay increasing to a moderate chop in the afternoon.
Saturday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Sunday..South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. A light chop on the bay increasing to a moderate chop in the afternoon.
Sunday night..South winds 5 to 10 knots. A light chop on the bay. Slight chance of showers and Thunderstorms.
Monday..Southeast winds around 5 knots becoming east in the afternoon. Smooth on the bay increasing to a light chop in the afternoon. Slight chance of showers and Thunderstorms.
Monday night..East winds 5 to 10 knots becoming southeast after midnight. A light chop on the bay subsiding to smooth after midnight. Slight chance of showers and Thunderstorms.
Tuesday..Southeast winds 5 to 10 knots shifting east in the afternoon. A light chop on the bay. Slight chance of showers and Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots. A light chop on the bay. Slight chance of showers and Thunderstorms.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 1032 Am Cdt Fri Jul 28 2017
Synopsis..Weak high pressure over the gulf waters will maintain a light to occasional moderate southeast wind and lower seas through the weekend. Winds will lessen and become easterly early next week as a weakening cold front moves into the northern gulf. No significant shower activity is expected this weekend but an increase in rain chances is anticipated for next week.

7 Day Forecast for Marine Location Near Port Isabel, TX
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location: 26.06, -97.22     debug

Area Discussion for - Brownsville, TX
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Fxus64 kbro 281117 aaa
area forecast discussion... Updated
national weather service brownsville tx
617 am cdt Fri jul 28 2017

Discussion Updated for latest aviation discussion below.

Aviation Vfr conditions to prevail today and tonight as high
pressure continues to build over the region. Light southeast winds
with occasional higher afternoon gusts are anticipated.

Prev discussion issued 403 am cdt Fri jul 28 2017
short term (today through Saturday): latest model trends remain
on track with the mid and upper level ridge indicated to expand
across texas the next 24-36 hours and beyond. This will continue
to gradually dry out the atmosphere with pwats lowering to 25
percent of normal Saturday. This should continue to keep the
chance of rain at or near zero percent with only a very isolated
brief shower over the gulf waters. As the atmosphere drys out and
the ridge axis builds more directly overhead heights and
thicknesses increase and 850mb temperatures inch upward into the
22-24c range which will translate to many locations exceeding 100
degrees both today and Saturday. The only reprieve will be east of
the 69e where mid to upper 90s are expected and the immediate
coast where lower 90s will be the rule. Dewpoints drop pretty
significantly in the west the next two days allowing for humidity
levels to crash into the 20 and 30 percent range. Pressure
gradient remains on the weak side but with the intense heating
deep mixing should result in occasional gusty periods in the
afternoon but should not be sustained sufficiently to preclude any
critical fire weather threats.

Long term (Saturday night through Thursday): Saturday night into
Sunday remain rain free as dry air remains in place and high
pressure dominates the region. Forecast for the upcoming week is
muddled, as each model focuses on different small-scale features
and the effects they would bring to the valley. Main overarching
midlevel patter is more well-agreed upon, that the us will
transition into a highly amplified pattern, with large ridge
across the rockies and large trough covering the eastern 2 3rds of
the us. This amplified trough will bring flow from the north
through the week, with embedded impulses sweeping across the
state. Timing on these is the problem, as each model focuses on a
different feature. GFS hints at a weak backdoor front as early as
Monday, while ec package hints at a wind shift front midweek. If
any of these features would bring a boundary into the region, they
would tap considerable moisture that will be already in place at
lower levels all week. With all this, have kept low rain chances
each day this week except Tuesday, but confidence is still fairly
low until the smaller features become better resolved in models.

today through Saturday: broad weak high pressure extending across
the gulf and subtle lower pressure over NE mexico to maintain a
light to moderate southeast flow. Favorable marine conditions are
anticipated today and tomorrow with slightly higher winds over the
laguna during the afternoon hours then across the gulf waters
overnight. Slight seas are expected with occasionally higher wind
waves developing in the evening and overnight hours.

Saturday night through Monday: light onshore flow continues
through the middle of next week as high pressure remains in
control of the northern gulf. Winds each day may not reach above
10 knots, which will keep seas 2 feet or less throughout the

Bro watches warnings advisories
Tx... None.

Gm... None.

This product is also available on the web at:
http: weather.Gov rgv
59 64

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi53 min 86°F 85°F1015.2 hPa (+0.3)
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi53 min SSE 9.9 G 13 83°F 1015.6 hPa (+0.3)
BZST2 3 mi53 min SSE 8.9 G 11 82°F 79°F1014.4 hPa (+0.4)
42044 - PS-1126 TABS J 13 mi113 min S 5.8 G 7.8 81°F 82°F1015.2 hPa (+0.6)77°F
RLIT2 14 mi53 min SE 8.9 G 12 86°F 85°F1015 hPa (+0.0)
PMNT2 36 mi53 min 84°F 86°F1014.9 hPa (+0.0)

Wind History for Port Isabel, TX
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Isabel, Port Isabel-Cameron County Airport, TX9 mi60 minS 910.00 miFair91°F73°F57%1014.7 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX16 mi60 minS 1310.00 miA Few Clouds89°F73°F61%1015 hPa

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

Tide / Current Tables for Port Isabel, Texas
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Port Isabel
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Fri -- 01:35 AM CDT     0.22 feet Low Tide
Fri -- 06:52 AM CDT     Sunrise
Fri -- 08:34 AM CDT     0.95 feet High Tide
Fri -- 12:03 PM CDT     Moonrise
Fri -- 03:02 PM CDT     0.51 feet Low Tide
Fri -- 08:17 PM CDT     Sunset
Fri -- 08:33 PM CDT     0.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
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Click for Map
Fri -- 01:16 AM CDT     0.55 feet Low Tide
Fri -- 06:54 AM CDT     Sunrise
Fri -- 08:25 AM CDT     1.28 feet High Tide
Fri -- 12:04 PM CDT     Moonrise
Fri -- 02:28 PM CDT     0.77 feet Low Tide
Fri -- 08:18 PM CDT     Sunset
Fri -- 08:34 PM CDT     1.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of SouthCentralPlains    EDIT

Wind Forecast for Brownsville, TX (12,3,4,5)
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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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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.