Tuesday, November20, 2018 L-36.com


Marine Weather and Tides
Port Isabel, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:51AMSunset 5:40PM Tuesday November 20, 2018 1:25 PM CST (19:25 UTC) Moonrise 4:13PMMoonset 4:09AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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- 937 Am Cst Tue Nov 20 2018
Rest of today..North winds 15 to 20 knots. Choppy on the bay. Slight chance of rain and drizzle through the day.
Tonight..North winds 10 to 15 knots. A moderate chop on the bay. Slight chance of rain in the evening, then chance of rain after midnight.
Wednesday..Northeast winds 10 to 15 knots increasing to 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon. Chance of rain showers in the morning, then rain likely and chance of drizzle in the afternoon.
Wednesday night..Northeast winds 15 to 20 knots. Choppy on the bay. Chance of rain and drizzle.
Thursday..Northeast winds 15 to 20 knots diminishing to 10 to 15 knots in the afternoon. Choppy on the bay subsiding to a moderate chop in the afternoon. Chance of rain and drizzle.
Thursday night..East winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight. Slight chance of rain and drizzle.
Friday..Southwest winds around 5 knots shifting west in the afternoon. Smooth on the bay. Slight chance of rain and drizzle.
Friday night..Northwest winds around 5 knots. Smooth on the bay.
Saturday..North winds around 5 knots becoming east in the afternoon. Smooth on the bay building to a light chop in the afternoon.
Saturday night..South winds 10 to 15 knots. A moderate chop on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 937 Am Cst Tue Nov 20 2018
Synopsis..Fresh north northeast winds will relax tonight. Coastal low pressure and troughing will interact with high pressure over the northwest gulf again Wednesday through thanksgiving day, supporting strong winds and elevated seas. After improvement Friday and Saturday, south winds will pick up Saturday night ahead of a Sunday cold front that is forecast to bring strong north winds.


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 201736 aab
afdbro
area forecast discussion... Updated
national weather service brownsville tx
1136 am cst Tue nov 20 2018

Discussion Updated for latest aviation discussion below.

Aviation A pretty stout inversion still appears to be in
place at bro, with the vad wind profile confirming the NAM model
output with north winds up to 3 or 4 kft, shifting to southwest
above that. Guidance is showing an MVFR regime through tonight,
and with strengthening southeast 850 mb flow bringing moisture
over the top of the cooler air, don't expect much improvement
from the overcast skies. As light rain chances increase for
Wednesday, guidance lowers ceilings into high ifr territory,
along with possible modest visibility reductions into the 3 to 5
mile range.

Prev discussion issued 539 am cst Tue nov 20 2018
discussion... Updated for latest aviation discussion below.

Aviation... Ifr to isolated lifr ceilings can be expected this
morning as warm southerly flow continues to flow over relatively
cooler air at the surface. This inversion will continue through
the day, though some drier air in the low levels should allow for
some improvement this afternoon to MVFR. Overcast skies and light
drizzle will be possible through the night, especially closer to
the coast from hrl to bro.

Prev discussion... Issued 456 am cst Tue nov 20 2018
short term (now through Wednesday): a weak area of low pressure is
located over the gulf waters off the lower texas coast, which is in
part helping to bring cool, drizzly and overcast conditions to much
of deep south texas this morning. This trend will continue through
the period as another strong 1030mb surface high builds southward
across the southern plains Tuesday and Tuesday night. The surface
low offshore will weaken and gradually shift eastward this
afternoon, so rain chances will also shift to the immediate coast
and over the marine areas through the night. On Wednesday, models
are in good agreement with another coastal trough strengthening just
off the lower texas coast. This will increase rain chances once
again across the most of the area and especially across the eastern
half of the cwa. Most of the precipitation should be light and
stratiform with model soundings showing very little instability, if
any at all. Time-heights show the warm southerly low-level jet
riding over the relatively cooler surface, which will keep thick
overcast skies and drizzle into the thanksgiving holiday. Those
traveling for the holiday should allow extra time due to the
possibility of slick roadways.

Long term (Wednesday night through Monday): the weather pattern
discussed above will persist through Friday, with a continuation
of light precipitation and overcast skies anticipated. Dry weather
with decreased cloudiness and warming temperatures will occur for
very early in the weekend in advance of the next cold front,
which will sweep through late in the weekend. Generally dry
weather will continue with this frontal passage, but temperatures
should be brought to near normal levels after spiking to well
above normal values in advance of the boundary.

Marine (now through Wednesday): a coastal low just off the lower
texas coast will continue to produce moderate to strong north
winds through this morning and early afternoon. Small craft
advisory conditions will be possible across the offshore water
beyond 20 nautical miles, therefore a small craft advisory is in
effect through 12 pm cst today. Conditions should briefly improve
Tuesday night before another high pushes into north texas on
Wednesday. Coastal troughing is expected to strengthen again, with
possible adverse marine conditions returning.

Wednesday night through Monday: slightly adverse marine
conditions, featuring small craft exercise caution or small craft
advisory, are anticipated Wednesday night through Thursday night
with coastal troughiness along the lower texas coast persisting. A
brief improvement in winds and seas is expected for the end of the
week and early in the weekend before a cold front blasts through
the lower texas coastal waters late in the weekend. Small craft
advisory and even gale warning conditions may occur Sunday into
Monday due to the passage of this front.

Bro watches warnings advisories
Tx... None.

Gm... Small craft advisory until 6 pm cst this evening for gmz170-175.

This product is also available on the web at:
http: weather.Gov rgv
54 56


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi44 min NNW 17 G 21 56°F 65°F1023.5 hPa
BZST2 3 mi44 min NNW 16 G 22 57°F 64°F1022.8 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi44 min NNW 21 G 26 57°F 1023.9 hPa
RLIT2 14 mi44 min NNW 17 G 22 57°F 55°F1024.3 hPa
PMNT2 36 mi38 min 57°F 62°F1024.9 hPa

Wind History for Port Isabel, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Isabel, Port Isabel-Cameron County Airport, TX9 mi33 minNNW 1410.00 miOvercast59°F50°F72%1024 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX16 mi33 minNNW 13 G 1910.00 miOvercast58°F51°F78%1024.2 hPa

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

Tide / Current Tables for Port Isabel, Texas
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Port Isabel
Click for Map
Tue -- 12:10 AM CST     1.27 feet High Tide
Tue -- 04:09 AM CST     Moonset
Tue -- 06:50 AM CST     Sunrise
Tue -- 07:14 AM CST     0.52 feet Low Tide
Tue -- 03:11 PM CST     1.42 feet High Tide
Tue -- 04:12 PM CST     Moonrise
Tue -- 05:37 PM CST     Sunset
Tue -- 08:33 PM CST     1.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.21.210.90.70.60.50.50.60.811.11.31.41.41.41.31.31.21.21.21.21.2

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
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Matamoros
Click for Map
Tue -- 12:09 AM CST     1.23 feet High Tide
Tue -- 04:10 AM CST     Moonset
Tue -- 06:51 AM CST     Sunrise
Tue -- 07:05 AM CST     0.36 feet Low Tide
Tue -- 02:50 PM CST     1.37 feet High Tide
Tue -- 04:14 PM CST     Moonrise
Tue -- 05:39 PM CST     Sunset
Tue -- 07:54 PM CST     1.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.21.10.90.70.60.40.40.40.50.70.91.11.31.31.41.31.21.11.11.11.11.11.2

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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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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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.