Monday, September25, 2017 L-36.com


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 7:19AMSunset 7:23PM Monday September 25, 2017 7:12 PM CDT (00:12 UTC) Moonrise 11:06AMMoonset 10:17PM Illumination 28% 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- 434 Pm Cdt Mon Sep 25 2017
Tonight..Southeast winds 10 to 15 knots. A moderate chop on the bay. Chance of showers and slight chance of Thunderstorms after midnight.
Tuesday..Southeast winds 10 to 15 knots. A moderate chop on the bay. Chance of showers and slight chance of Thunderstorms.
Tuesday night..Southeast winds 10 to 15 knots. A moderate chop on the bay. Chance of showers in the evening. Slight chance of Thunderstorms through the night. Slight chance of showers after midnight.
Wednesday..East 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. Chance of showers and slight chance of Thunderstorms.
Wednesday 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. Chance of showers and slight chance of Thunderstorms.
Thursday..Northeast winds 10 to 15 knots. A moderate chop on the bay. Chance of showers and slight chance of Thunderstorms.
Thursday night..Northeast 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 showers and Thunderstorms.
Friday..Northeast winds 5 to 10 knots. A light chop on the bay. Slight chance of showers and Thunderstorms.
Friday night..Northeast winds 5 to 10 knots. A light chop on the bay. Chance of showers and slight chance of Thunderstorms.
Saturday..Northeast winds 10 to 15 knots. A moderate chop on the bay. Chance of showers and slight chance of Thunderstorms.
Saturday night..Northeast 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 showers and Thunderstorms.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 434 Pm Cdt Mon Sep 25 2017
Synopsis..Light to moderate onshore flow and low seas will prevail through at least midweek as surface high pressure remains in place over the southeastern united states. Winds will shift to the northeast on Friday as a weak cold front moves through the lower texas coastal waters. Isolated to scattered showers and Thunderstorms each day may produce locally higher winds and seas.

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 252320 aaa
afdbro
area forecast discussion... Updated
national weather service brownsville tx
620 pm cdt Mon sep 25 2017

Discussion Updated for latest aviation discussion below.

Aviation Generally,VFR conditions are expected for all
terminals through this TAF cycle. Winds will decrease shortly
after sunset this evening, however, gusty conditions can be
expected again by mid-morning on Tuesday.

Mid and upper level clouds will likely begin to increase with time
Tuesday afternoon and can't rule out a shower or storm, especially
for the mcallen terminal. At this time, confidence is rather low
so only included vcs for now. If convection does indeed occur,
expect brief reduction in cig vis.

Prev discussion issued 241 pm cdt Mon sep 25 2017
short term (now through Tuesday night): south texas remains
between the h5 ridge just offshore and the large-scale along the
rockies. Morning sounding showed pw values of 2.02 inches, which
is similar to goes16 sounder readings this afternoon. As the ridge
shifts east slightly late tonight, the leading edge of the trough
will begin to push more moisture into the region aloft. Along
with this will be shortwave impulses rotating through the region,
adding instability to the atmosphere. Tonight, rain chances will
remain low, as surface forcing will be minimal with no boundaries
to work with. Tomorrow will see a better shot for showers and
thunderstorms as the next shortwave arrives and influences the
seabreeze. Best chances for rainfall will be further inland closer
to the trough, once the seabreeze gets moving. Increased cloud
cover closer to the surface and increased cirrus aloft will hold
temps down a couple degrees from today, but will still reach the
low to mid 90s ahead of the advancing seabreeze.

Long term (Wednesday through Monday):
a cut off low should set up over the southwest united states by
Wednesday while ridging centered over the northwest gulf spreads
out. A persistent weak background of surface high pressure will
continue over the north gulf, providing a moderate east flow for the
cwa. Plains high pressure will push a weak front into north texas on
Thursday. The front will arrive Thursday night with a local wind
shift to northeast. The front will push offshore on Friday. High
pressure will move out of canada over the great lakes on Friday, a
portion of which will ultimately spread south over the lower
mississippi valley and into east texas and the northwest gulf,
reinforcing the ongoing high pressure pattern and prolonging
northeast winds. The proximity of the cut off low could provide a
higher strong weather threat to the upper valley in the early stages
of the long term, but the models seem less eager to do so today
compared to yesterday. Nonetheless, slightly higher pops were
retained for portions of the upper valley. Rain chances over the
remainder of the CWA will be better predicated on the ample low
level gulf moisture forecast, generally at or above two inches near
the coast, except for a brief decrement on Sunday. Should see a mix
of clouds and Sun throughout, maybe leaning toward mostly cloudy,
with near normal temperatures. Retained the inherited forecast with
minor changes, and used a model blend as the background. The GFS was
slightly wetter in a couple of the periods, but comparable to the
ecmwf in most other respects.

Marine:
now through Tuesday night: minimal chance in the forecast for the
next 36 hours across the northwest gulf as high pressure remains
well to the northeast, causing modest onshore east to southeast
flow. Wave action will remain consistent through tomorrow in the 2
to 3 foot range. An increase in fetch length later tomorrow will
bring some higher longer period swells closer to shore Tuesday
night. Streamer shower activity will continue tonight and again
tomorrow night, mainly just before dawn.

Wednesday through Saturday night: the pressure field will remain
rather broad and flat through the long term, supporting continued
light to moderate onshore winds and low to moderate seas. However,
winds will back from southeast to east Wednesday and Thursday as a
new air mass works into the area from the north. Subsequent high
pressure reinforcement will further back winds to northeast Thursday
night. Ample moisture pooling ahead of the associated weak front
identified to arrive Thursday night will keep at least a slight
chance of showers and thunderstorms in the forecast for the marine
areas.

Bro watches warnings advisories
Tx... None.

Gm... None.

This product is also available on the web at:
http: weather.Gov rgv
61 59 58


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi43 min SE 14 G 18 84°F 85°F1006.8 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi43 min SE 15 G 18 84°F 1007.2 hPa
BZST2 3 mi43 min ESE 17 G 19 1006 hPa
RLIT2 14 mi43 min ESE 16 G 20 85°F 84°F1006.7 hPa
PMNT2 36 mi43 min 85°F 85°F1006.8 hPa
42045 - PI-745 TABS K 40 mi133 min S 14 G 16 85°F1007.1 hPa (-1.2)

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 mi20 minESE 136.00 miPartly Cloudy with Haze86°F77°F75%1006.5 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX16 mi20 minSE 1310.00 miFair85°F75°F75%1006.5 hPa

Wind History from SPL (wind in knots)
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Last 24hrSE7S7S10S8S8S9S8W5SW11S14SW13SW8SW6N4E3NE7NE6E4E5E6E4E3E4Calm
1 day agoS8S7S4SW5NW3N3N3N6E4NE4E5E13SE16NW8S4S7S5CalmCalmSE6SE6SE5SE6SE5
2 days agoSE7SE7SE8SE3S5S6S6SW5NW3NW4SW8SW11S20SW16
G21
SW14
G18
S15S18S15S14S10SW9SW8S9S7

Tide / Current Tables for Port Isabel, Texas
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Port Isabel
Click for Map
Mon -- 07:18 AM CDT     Sunrise
Mon -- 12:06 PM CDT     Moonrise
Mon -- 01:16 PM CDT     0.49 feet Low Tide
Mon -- 07:21 PM CDT     Sunset
Mon -- 10:56 PM CDT     1.53 feet High Tide
Mon -- 11:17 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.41.31.31.31.31.31.21.110.80.70.50.50.50.60.70.91.11.31.41.51.51.5

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
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Matamoros
Click for Map
Mon -- 02:15 AM CDT     1.71 feet Low Tide
Mon -- 04:20 AM CDT     1.72 feet High Tide
Mon -- 07:19 AM CDT     Sunrise
Mon -- 12:07 PM CDT     Moonrise
Mon -- 01:05 PM CDT     0.81 feet Low Tide
Mon -- 07:22 PM CDT     Sunset
Mon -- 10:36 PM CDT     1.88 feet High Tide
Mon -- 11:19 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.71.71.71.71.71.71.61.51.31.110.90.80.80.91.11.31.51.61.81.81.91.9

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 (20,4,5,8)
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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.