Tuesday, May21, 2019 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 6:40AMSunset 8:13PM Tuesday May 21, 2019 1:38 PM CDT (18:38 UTC) Moonrise 10:04PMMoonset 8:01AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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- 1011 Am Cdt Tue May 21 2019
.small craft advisory for winds in effect through Wednesday morning...
Rest of today..Southeast winds 20 to 25 knots through early afternoon...diminishing 15 to 20 knots. Few gusts up to 34 knots. Choppy to rough on the bay.
Tonight..Southeast winds 15 to 20 knots. Choppy on the bay.
Wednesday..Southeast winds around 20 knots. Choppy on the bay.
Wednesday night..Southeast winds around 20 knots. Rough on the bay.
Thursday..Southeast winds 15 to 20 knots. Choppy on the bay.
Thursday night..Southeast winds 15 to 20 knots. Choppy on the bay.
Friday..Southeast winds 15 to 20 knots. Choppy on the bay.
Friday night..Southeast winds 15 to 20 knots. Choppy on the bay.
Saturday..Southeast winds 15 to 20 knots. Choppy on the bay.
Saturday night..Southeast winds 15 to 20 knots. Choppy on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 1011 Am Cdt Tue May 21 2019
Synopsis..A strong pressure gradient continues this morning with only a slight weakening later today and tonight with a weak cold front approach western areas of deep south texas. The slight diminishing of the winds will not last long with persistent low pressure across the plains and high pressure over the gulf maintaining a moderate to strong onshore flow in place through the remainder of the week. As a result, small craft advisories are likely to continue through much of the week for winds, seas or both.


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 211747 aac
afdbro
area forecast discussion... Updated
national weather service brownsville tx
1247 pm cdt Tue may 21 2019

Discussion Updated for latest aviation discussion below.

Aviation MVFR CIGS near kbro becomeVFR this afternoon as
cumulus disperse with the continued mixing of drier air aloft.VFR
to dominate the remainder of the afternoon and a few hours after
sunset before the stratus layer reforms and spread north and west.

MVFR CIGS expected most of the night and into Wednesday morning
before mixing out by noon Wednesday. South and southeast wind
remain strong and gusty with gusts as high as 30 knots at khrl and
kbro before diminishing by evening, however gusts to remain around
20 knots much of the night. Windy conditions resume Wednesday with
southeast winds 20-25 knots.

Prev discussion issued 958 am cdt Tue may 21 2019
discussion... Latest surface observations platforms and wsr-88d
vad wind profile indicate the pressure gradient across the region
remaining strong this morning. The current VWP showing winds up
to 52 knots between 2500-4500 feet with some of these stronger
winds mixing to the surface this morning with plenty of mechanical
mixing underway. With this said, a wind advisory has been issued
for the 3 coastal counties through at least 2 pm. The low level
jet is expected to shift offshore by or shortly after noon as the
cold front dry line moves into the far western portions of the cwa
weakening the overall pressure gradient.

Prev discussion... Issued 607 am cdt Tue may 21 2019
discussion... Updated for latest aviation and marine discussions
below.

Aviation...VFR conditions will work in from west to east this
morning, with skies likely clearing to the west, including mfe for
this afternoon. Hrl and bro may hold onto a fewer high clouds this
afternoon. MVFR CIGS return late this evening from east to west
and continue into Wednesday morning. Strong southerly winds will
diminish slightly this morning into this afternoon, remaining
breezy to windy across hrl and bro through this evening and into
tonight.

Marine... Have replaced the gale warning with a small craft
advisory across gulf of mexico waters as previously advertised,
currently in effect through tonight. Winds may diminish this
evening through tonight, with seas expected to stay above sca
criteria through Wednesday. Extended the small craft advisory for
winds across the laguna madre also through tonight, although, this
would depend on winds along the lower texas coast persisting
above advisory criteria through the period.

Prev discussion... Issued 422 am cdt Tue may 21 2019
short term (today through Wednesday): low pressure continues
across the plains, keeping SE to sse winds moderate to strong
along the lower texas coast. The dryline works into the western
counties this afternoon, perhaps as far east as hidalgo county,
before retreating back west this evening. The arrival of this
feature could help boost high temperatures out west, clear skies
faster, and help to keep stronger winds further east. This will
also bring a brief break from the muggy conditions, cutting
humidity values through the afternoon. Heat index values across
portions of the low to mid valley will approach 105 degrees today.

Today will likely be the hottest day of the week, at the very
least rivaling the highs observed on Sunday and Monday, but
Wednesday may feel more uncomfortable due to the return of higher
humidity values. This leads the upper valley and western brush
country areas towards heat advisory criteria Wednesday afternoon.

Heat index values across the rgv will top 105 degrees, and
approach 110 degrees near the border in starr and zapata counties.

Long term (Wednesday night through Monday): a series of 500 mb
closed lows will dominate the western portions of the lower 48
states through Monday. At the same time, 500 mb troughs will dig
down over the western atlantic into the weekend. This will in turn
build a broad and strong ridge axis over much of the southeastern
states and the gulf of mexico. This will result in a persistent
hot and rain free pattern over the rgv through mon. Low level
moisture values will persist throughout the period making for
pretty elevated heat indices each afternoon. However, significant
deep layer moisture will remain absent across the area keeping
pops in the silent 5 to 10 % range.

Temp and pop guidance from both the ECMWF and the GFS are in very
good agreement through day 7 8 and run to run consistency is very
steady over the last several days runs. So will go close to a
model blend for highs and lows throughout the period.

The pgf will remain pretty strong throughout the upcoming long
range period resulting in persistent breezy to windy conditions
into the memorial day weekend.

Marine (now through Wednesday): strong SE winds gradually
decrease into mid morning, with moderate to strong SE and sse
winds continuing through Wednesday, peaking slightly again
Wednesday afternoon. Gale warning continues until 7 am this
morning, with most observations showing improvement over the past
couple of hours. A small craft advisory will follow and likely
continue through Wednesday. A small craft advisory for winds will
be extended across the laguna madre into Wednesday as well.

Wednesday night through Saturday night: persistent surface
ridging over the gulf of mex will interact with a steady
progression of surface low pressure systems moving across the
central plains states to maintain scec SCA conditions over much
of the lower tx marine areas through Sat night. The strongest pgf
will most likely occur around Wed thurs with a little lower winds
and seas expected Sat sat night.

Bro watches warnings advisories
Tx... Wind advisory until 2 pm cdt this afternoon for txz251-254>257-
351.

Gm... Small craft advisory for winds until 7 am cdt Wednesday for
gmz130-132-135.

Small craft advisory until 7 am cdt Wednesday for gmz150-155-170-
175.

This product is also available on the web at:
http: weather.Gov rgv
59 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTIT2 - 8779770 - Port Isabel, TX 0 mi44 min SSE 21 G 26 87°F 81°F1004.5 hPa
BZST2 3 mi44 min S 17 G 20 82°F 75°F1003.8 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 3 mi44 min SSE 25 G 28 83°F 1004.6 hPa
42044 - PS-1126 TABS J 13 mi98 min 1004.1 hPa (+0.8)
RLIT2 14 mi44 min SSE 20 G 23 88°F 81°F1004.4 hPa
PMNT2 36 mi44 min 90°F 83°F1004.1 hPa
42045 - PI-745 TABS K 40 mi128 min SSE 18 G 21 78°F 80°F1004.9 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 mi45 minS 16 G 286.00 miPartly Cloudy with Haze91°F73°F57%1003.9 hPa
Brownsville, Brownsville / South Padre Island International Airport, TX16 mi45 minS 23 G 3310.00 miPartly Cloudy and Windy93°F77°F60%1004.1 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 Port Isabel, Texas
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Port Isabel
Click for Map
Tue -- 06:39 AM CDT     Sunrise
Tue -- 09:00 AM CDT     Moonset
Tue -- 09:20 AM CDT     1.58 feet High Tide
Tue -- 08:11 PM CDT     Sunset
Tue -- 11:03 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.200.30.711.21.41.51.61.61.51.51.41.31.21.110.80.60.40.1-0.1-0.3

Tide / Current Tables for Matamoros, Tamaulipas, Mexico
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Matamoros
Click for Map
Tue -- 06:41 AM CDT     Sunrise
Tue -- 08:45 AM CDT     1.39 feet High Tide
Tue -- 09:02 AM CDT     Moonset
Tue -- 08:12 PM CDT     Sunset
Tue -- 11:04 PM CDT     Moonrise
Tue -- 11:49 PM CDT     -0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.5-0.4-0.10.20.60.91.11.31.41.41.31.31.21.21.11.110.90.70.40.2-0.1-0.3-0.5

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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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.