Friday, May26, 2017 L-36.com


Marine Weather and Tides
Port Isabel, 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 6:38AMSunset 8:16PM Friday May 26, 2017 2:29 AM CDT (07:29 UTC) Moonrise 6:35AMMoonset 8:23PM Illumination 1% Phase: New Moon; Moon at 1 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
    EDIT      (on/off)   Help
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- 1020 Pm Cdt Thu May 25 2017
.small craft should exercise caution...
Rest of tonight..South winds 15 to 19 knots. Choppy on the bay.
Friday..Southeast winds 15 to 19 knots. Choppy on the bay.
Friday night..South winds 13 to 18 knots. Choppy on the bay.
Saturday..Southeast winds 14 to 19 knots. Choppy on the bay.
Saturday night..Southeast winds 12 to 17 knots. A moderate chop on the bay.
Sunday..Southeast winds 12 to 17 knots. A moderate chop on the bay.
Sunday night..Southeast winds 12 to 17 knots. A moderate chop on the bay.
Monday..Southeast winds 10 to 13 knots. A moderate chop on the bay. Slight chance of showers and Thunderstorms.
Monday night..East winds 7 to 12 knots. A light chop on the bay. Chance of showers and Thunderstorms.
Tuesday..Southeast winds 8 to 12 knots. A light chop on the bay. Chance of showers and Thunderstorms.
Tuesday night..Southeast winds 9 to 12 knots. A moderate chop on the bay. Chance of showers and Thunderstorms.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 1020 Pm Cdt Thu May 25 2017
Synopsis..The pressure gradient will remain tight through Friday as gulf high pressure interacts with low pressure across the southern plains. Adverse marine conditions will prevail along the lower texas coast tonight into Friday. More moderate marine conditions return for the holiday weekend through early next week as a frontal boundary approaches and then stalls just north of the area...weakening the pressure gradient. Showers and some Thunderstorms will return to the forecast by memorial day.

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


Area Discussion for - Brownsville, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 kbro 260549 aaa
afdbro
area forecast discussion... Updated
national weather service brownsville tx
1249 am cdt Fri may 26 2017

Discussion Updated for latest aviation discussion below.

Aviation Mostly cloudy skies with southeast winds around 15
knots prevail across deep south texas early this morning. Winds
will become breezy later this morning into the afternoon as low
pressure across west texas interacts with gulf high pressure. MVFR
ceilings expected to persist overnight with brief periods of
scattering out. FullVFR should return by early afternoon as the
cloud layer mixes out. MVFR ceilings will develop late in the
period mainly after 2z Saturday.

Prev discussion issued 646 pm cdt Thu may 25 2017
discussion... Updated for latest aviation discussion below.

Aviation... Tight pressure gradient across texas and the gulf of
mexico will keep breezy SE winds going until an hour or so after
sunset, with winds expected to remain at moderate levels through
the night at all of the terminals. Winds quickly pick back up to
breezy levels by mid-morning, continuing into the afternoon, but
do not expect airport weather warning criterion of 35kt to be
threatened at either bro or hrl.

Lowered cig slightly for the overnight hours at all three
terminals. Confident that MVFR ceilings will develop, though there
could be brief periods of scattering out, as suggested by mos
guidance and rap forecast soundings. FullVFR should return by
early afternoon as the cloud layer mixes out.

Prev discussion... Issued 249 pm cdt Thu may 25 2017
short term (tonight through Friday night): 500mb ridge across
the central united states this afternoon will begin to move
eastward tonight into Friday as a 500mb subtropical ridge develops
across northeast mexico and the rio grande valley. This will
continue to provide subsidence across the CWA even as an onshore
flow continues to increase across the lower texas coast tonight
into Friday. Very warm... Breezy and humid conditions will prevail
across the rio grande valley and northern ranchlands tonight
through Fri night with no rain chances expected through the
period.

Long term (Saturday through Thursday): hot and dry weather will
prevail Saturday with weak ridging over the southeast united states
and high pressure over the gulf. High temperatures locally will
range from the lower 90s to above the century mark. Heat index
values will increase to between 105 and 110 degrees Saturday
afternoon. A front will overtake the dry line upstream, provoking
convection over the big bend area of texas. By Sunday, with a mean
trough over the upper midwest and ridging again building over the
western united states, high pressure will spill southeast from the
upper northwest united states, pushing into central tex. A similarly
hot day relative to Saturday will prevail Sunday, with upstream
convection edging closer with the slow moving front. Convection will
fire over the rgv plains Sunday night with a few cells possibly
moving into the northwest sector of the cwa. The front will approach
the CWA on Monday, less emphatically than before, with winds
weakening and with some uncertainty as to whether the front will
have enough push to make it through. At any rate, the atmosphere
will be slightly destabilized resulting in an increase in rain
chances, particularly inland, where convection may fire late Monday
night into Tuesday morning. Southeast flow will regain its footing
on Tuesday and Wednesday, plus a destabilizing mid level low will
approach from the west, with diurnal showers firing over the cwa
while the lingering front is stalled or pushed back north. Only by
Thursday will rain chances settle down to the more benign coastal
sea breeze type, as the upstream low edges northeast. A weakness
above the southwest gulf may begin to trigger convection offshore
the latter half of next week.

Marine (tonight through Friday night): seas were near 4 feet with
south to southeast winds near 21 knots at buoy020 this afternoon.

Moderate to strong south to southeast winds will prevail across
the coastal waters tonight as low pressure across the southern
plains and high pressure across the eastern gulf of mexico
provides a tight pressure gradient across the western gulf. Will
go ahead and extend the SCA for the bay waters through this
evening and post an SCA for the offshore for this evening through
fri morning. The pressure gradient will remain strong across the
coastal waters Friday and small craft advisories will be needed
for the laguna madre Fri morning and the SCA for the offshore
waters may need to be extended possibly through Fri afternoon.

Small craft advisories will be needed for the offshore waters for
fri night for strong southeast winds.

Saturday through Tuesday night: a persistent pattern of high
pressure will dominate the gulf during this period. Thus, look for
mainly moderate southeast winds and seas. Seas of four to six feet
will be common offshore, qualifying for small craft should exercise
caution headlines.

Bro watches warnings advisories
Tx... None.

Gm... Small craft advisory until 7 am cdt this morning for gmz150-155-
170-175.

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


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi41 min SSE 20 G 24 80°F 82°F1009.5 hPa
BZST2 3 mi41 min SSE 20 G 23 80°F 81°F1008.6 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi41 min S 19 G 23 80°F 1009.9 hPa
42044 - PS-1126 TABS J 13 mi89 min S 18 G 21 79°F 80°F1010 hPa74°F
RLIT2 14 mi41 min SSE 16 G 20 79°F1009.5 hPa
PMNT2 36 mi41 min 79°F 82°F1008.4 hPa
42045 - PI-745 TABS K 40 mi89 min 19 G 25 78°F 79°F1009.7 hPa75°F

Wind History for Port Isabel, TX
(wind in knots)    EDIT      (on/off)   Help
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
Last
24hr
SE13
G17
SE11
G15
SE12
G16
SE13
G17
SE13
G16
SE11
G14
SE11
SE12
G17
SE13
G20
SE14
G20
SE14
G20
SE15
G21
SE15
G20
SE16
G21
SE17
G23
SE17
G22
SE17
G22
SE19
G23
SE18
G22
SE19
G24
SE18
G22
SE16
SE16
G21
SE19
1 day
ago
N15
G21
N12
G15
N16
G21
N14
G18
N12
G16
N11
G16
N14
G18
N17
G22
N14
G19
N11
G15
N12
G16
N8
G13
N10
G13
N3
G11
N2
G11
N3
G7
SW2
S2
G5
S4
G7
S3
G6
S3
S4
G7
S5
S6
G10
2 days
ago
S5
S4
N3
NW4
SE1
S1
NE2
G7
N3
G6
W1
G6
S2
G5
S2
G5
S5
G8
W1
N3
N4
N4
S3
S1
N1
N19
G23
N16
G22

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Isabel, Port Isabel-Cameron County Airport, TX9 mi36 minS 13 G 199.00 miOvercast80°F75°F85%1009.3 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX16 mi36 minSSE 1310.00 miOvercast81°F75°F82%1009.5 hPa

Wind History from SPL (wind in knots)
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hrSE7S7S10S8S8S9S8W5SW11S14SW13SW8SW6N4E3NE7NE6E4E5E6E4E3E4Calm
1 day agoS8S7S4SW5NW3N3N3N6E4NE4E5E13SE16NW8S4S7S5CalmCalmSE6SE6SE5SE6SE5
2 days agoSE7SE7SE8SE3S5S6S6SW5NW3NW4SW8SW11S20SW16
G21
SW14
G18
S15S18S15S14S10SW9SW8S9S7

Tide / Current Tables for Port Isabel, Texas
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Port Isabel
Click for Map
Fri -- 06:38 AM CDT     Sunrise
Fri -- 07:22 AM CDT     1.64 feet High Tide
Fri -- 07:35 AM CDT     Moonrise
Fri -- 08:13 PM CDT     Sunset
Fri -- 09:22 PM CDT     Moonset
Fri -- 10:47 PM CDT     -0.61 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.10.40.81.21.41.61.61.61.61.51.41.31.31.21.110.80.50.2-0.1-0.4-0.6-0.6

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
   EDIT      (on/off)   Help   One Week of Data
Matamoros
Click for Map
Fri -- 06:39 AM CDT     Sunrise
Fri -- 06:44 AM CDT     1.49 feet High Tide
Fri -- 07:36 AM CDT     Moonrise
Fri -- 08:14 PM CDT     Sunset
Fri -- 09:23 PM CDT     Moonset
Fri -- 10:32 PM CDT     -0.78 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-00.40.81.11.31.51.51.41.31.21.11.11.11.110.90.60.40-0.3-0.6-0.8-0.8

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Brownsville, TX (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Brownsville, TX
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


Ad by Google

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.