Marine Weather and Tides
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.
|Sunrise 7:33AM||Sunset 7:41PM||Sunday March 18, 2018 2:37 PM CDT (19:37 UTC)||Moonrise 7:29AM||Moonset 7:56PM||Illumination 4%|
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- 901 Am Cdt Sun Mar 18 2018 |
Rest of today..Southeast winds around 5 knots increasing to 5 to 10 knots in the afternoon. Smooth on the bay increasing to a light chop in the afternoon.
Tonight..Southeast winds 5 to 10 knots shifting south after midnight. A light chop on the bay. Patchy fog after midnight.
Monday..Northwest winds 5 to 10 knots shifting north in the afternoon. A light chop on the bay. Patchy fog in the morning. Slight chance of showers in the morning.
Monday night..Southeast winds 5 to 10 knots becoming west 10 to 15 knots after midnight. A light chop on the bay increasing to a moderate chop after midnight.
Tuesday..North winds 15 to 20 knots becoming northeast 10 to 15 knots in the afternoon. Choppy on the bay subsiding to a moderate chop in the afternoon.
Tuesday night..East winds 5 to 10 knots. A light chop on the bay.
Wednesday..East 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.
Wednesday night..Southeast 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.
Thursday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Thursday night..Southeast winds 10 to 15 knots. A moderate chop on the bay.
|GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 901 Am Cdt Sun Mar 18 2018 |
Synopsis..Weak pressure systems across the gulf of mexico will maintain light winds and slight to moderate seas today and tonight. A weak cold front will cross the waters Monday, followed by weak high pressure into Monday night, with light winds and slight to moderate seas continuing. A somewhat stronger front will sweep the waters Monday night with a stronger high quickly building over the waters Tuesday. Gusty north winds and briefly building seas are expected Tuesday. The high pressure ridge will remain near the waters Wednesday, with diminishing winds and subsiding seas. The ridge will strengthen while moving across the northern gulf coast Wednesday night and Thursday as trough of low pressure develops over west texas. Increasing southerly flow between the two systems Thursday afternoon and night may require small craft advisories for all or part of the waters.
7 Day Forecast for Marine Location Near South Padre Island, TXHourly EDIT Help
Area Discussion for - Brownsville, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus64 kbro 181708|
area forecast discussion
national weather service brownsville tx
1208 pm cdt Sun mar 18 2018
Discussion Updated for latest aviation discussion below.
Aviation Satellite imagery was showing clouds diminishing
from west to east across the forecast area in a fashion very
similar to what occurred Saturday afternoon... Albiet a little
slower than Saturday afternoon. Skies were mostly clear withVFR
conditions west of a kbks-kmfe behind a weak front moving across
the forecast area. Clouds MVFR CIGS were widespread east of this
line along and ahead of the front, but were slowly diminishing
with daytime heating and the eastward progression of the front.
Clouds will be the slowest to diminish over willacy and cameron
counties this afternoon as the weak front continues to move east.
Overnight tonight, mvrf CIGS will become widespread once again
mainly over the eastern two-thirds of the forecast area before
another weak front moves southeastward through the forecast area
Monday morning. This front will bring similar west to east
clearing at the tail end of the TAF period. Winds generally
remaining below 15 knots at all of the terminals through the taf
Prev discussion issued 645 am cdt Sun mar 18 2018
discussion... Updated for latest 12z aviation discussion below.
Aviation... "underrunning" southerly flow overnight has been key
to keeping ceilings at MVFR for most of the night, and even light
mist has been virtually non-existent as we approach sunrise. That
said, if there's a slight dip in winds around daybreak, some light
mist could form and ceilings could briefly dip to high ifr levels
for a couple hours post-sunrise. Thereafter, no change to the
prior forecast, which breaks clouds gradually by late morning with
hazy sunshine (no visibility restrictions however) by afternoon.
Winds a bit tricky as peak values did rise to near 20 knots on
Saturday, but gradient has further slackened and with flow above
950 mb dropping below 10 knots before shifting northwest higher
up, expect no more than 15-17 knot gusts with sustained winds
fresh but relatively light.
No changes for tonight, either - except to push back the arrival
of ceilings closer to midnight as has been the case the past few
nights. 06z model guidance still suggesting lifr as the dominant
cloud base for most areas, and kept this for all but mcallen (MVFR
there). With lighter winds toward daybreak ahead of the Monday
wind shift, a better opportunity for some mist but nowhere near as
low as guidance suggest for reasons given in prior aviation
discussion at 06z. Held at 4-5sm for now... And that's no
prev discussion... Issued 350 am cdt Sun mar 18 2018
short term (today through Monday):
the spring we've expected, at least for the short term and through
most of the work week, is right in gear: warmer to much warmer
than average, little to no rainfall, and drying fronts and or
patterns that combine with the increasing Sun angle to gradually
worsen drought conditions while winds and drying fuels increase
the threat for erratic wildfire behavior and growth. For the short
term, we'll be dealing with all of these issues.
For today (Sunday)... Little change to the prior forecast thinking. A
weak shear axis passes through the south texas brush country and
coastal bend this afternoon evening and brushes by the northern
ranchlands late this afternoon. Position of 250 mb jet and low level
potential temperature ridge are ideal for convection... And model
soundings (particularly the gfs) for hebbronville falfurrias are
quite impressive. Only problem? Timing, and impressive drying
above the thinning to erasing clouds down low; the atmospheric
energy is indeed moisture starved soon after the potential builds.
There remains a window between 1 and 4 pm (hebbronville to
falfurrias) and a little after 4 pm (king ranch area) for isolated
thunderstorms. Should a storm or two "go", large hail gusty winds
are supported by the atmosphere and will add to the hazardous
Otherwise, the valley remains dry with an afternoon heat "spike" as
winds turn northwest mainly west of us 281. We reached 97 in zapata
and 94 in mcallen, with an unofficial mesowest site touching 100
near the river at falcon lake on Saturday, and see no reason for
this not to occur again today so will raise temperatures
accordingly. Dewpoints have been woefully overforecast by models in
recent days out there and will lower by 5 to 10 degrees in the
pocket of northwest winds to account for reality this afternoon.
Morning clouds in most areas will burn off by or shortly after noon
so the sense of the sky will be sunny to mostly sunny.
The low clouds return tonight across the rgv and probably for a time|
across the rio grande plains, though the wind shift to the northwest
will arrive right around or just after sunrise out there. One last
muggy night with temperatures not falling below 70 for most
populated areas, as southeast winds kick up a hair as they have done
in recent nights. For this reason, fog will be limited but did add
patchy wording for 3 mile type action through the Monday morning
commute in these areas.
For Monday, the wind shift quickly surges from the rio grande plains
through the lower valley by mid morning; the slightly faster GFS nam
are preferred based on the fairly speedy flow aloft that brings
the "dip" which pushes the boundary through. There is just a hint
of low level moisture and lift during the late morning through
noon or so that could kick off light showers behind the wind
shift, but these too favor areas north of the rgv and won't last
more than an hour in any one location. Soon after, clearing skies
and a cleaner look to the sky overspreads the entire region. A
fresh northwest breeze won't do much to dent high temperatures,
though slightly lower 850 mb temperatures will bring afternoon
temperatures down about 8 to 10 degrees from today across the
starr-jim hogg-zapata region, 5 degrees cooler in kenedy county,
with little change farther east and southeast.
Long term (Monday night through Saturday):
the long term forecast is dominated by strong h5 ridge across the
central us, keeping the main storm system track well to the north.
This means local weather will continue to be influenced more by
surface features through the upcoming week. On Tuesday, the main
surge of high pressure arrives behind Monday's front, bringing
breezy conditions along the coast. This will also provide nearly
clear skies with highs in the lower 80s across the region. Onshore
flow returns on Wednesday as the sfc high moves across the
mississippi valley. This will help bring gulf moisture back into
the region, pushing temperatures back into the upper 80s. Gusty
southeast winds continue Thursday through Saturday, with highs
reaching the upper 80s and lower 90s each afternoon.
now through Monday: winds and seas at 3 am were right where we
left them on Saturday morning: around 3 feet with 11 knot
sustained and a few higher gusts from the south southeast. The
usual diurnal dip will keep winds around 7 to 10 knots and seas 2
to 3 feet in the gulf, with some gustiness over laguna madre
especially north of the bay. Similar winds overnight with a
similar gradient well ahead of the wind shift, which arrives
Monday late morning to early afternoon. Flat flow aloft translates
to a weak "bubble" high of less than 1010 mb and with little cold
air advection expect 10 knot or less wind and slight to moderate
seas at most. A pretty fine situation for boating and fishing both
Tuesday through Thursday: gusty north winds arrive across the gulf
waters Tuesday as a secondary surge of high pressure sweeps
southward. Winds will likely reach right around 20 knots,
necessitating short advisories for the day Tuesday. Lighter
easterly flow develops Wednesday with the ridge in the vicinity,
allowing seas to relax down to around 2 feet. Southeast return
flow sets up Thursday as the high moves east and low pressure
deepens across kansas. Winds will reach the 15 to 20 knot range,
with wave heights increasing to 4 to 5 feet.
Fire weather... As discussed here and in outlooks the past couple of
days, Monday's situation is locking in for at least part of the
forecast area. Current forecast indicates afternoon humidity falling
to 10 to 15 percent from western hidalgo and much of brooks county
through the rio grande plains, with the longest duration and lowest
humidity likely in starr, jim hogg, and zapata county. Ecmwf
dewpoints continue to point to upper teens to mid 20s across these
areas, with upper 20s to mid 30s during the rapid dryout farther
east but not including areas along east of us 77 in the lower valley
where some onshore component will neutralize dewpoint falls. In
fact, ECMWF still carries upper 60s in brownsville, around 60 in
harlingen, but around 50 in harlingen and falling to the lower 20s
farther west and northwest. In these areas, increased downward
mixing of 20 to 25 knot winds off the surface is expected, and have
bumped 10m wind forecasts to 15-17 knots for the time of the rapidly
falling humidity. This translates to a "15 15" rule event - but
with the weekend's drying (12 percent rh in hebbronville to zapata)
we likely have dry to very dry fine fuels setting up to further
enhance the threat. With all this in mind, will be issuing a fire
weather watch for hidalgo brooks westward. Thanks for NWS corpus
christi for collaborating this morning.
Bro watches warnings advisories
Tx... Fire weather watch from Monday afternoon through Monday evening
This product is also available on the web at:
http: weather.Gov rgv
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|BZST2||3 mi||56 min||SE 8.9 G 9.9||73°F||73°F||1008.1 hPa|
|PCGT2 - 8779748 - South Padre Island CGS, TX||3 mi||50 min||SE 9.9 G 12||75°F||1009.5 hPa|
|PTIT2 - 8779770 - Port Isabel, TX||4 mi||50 min||SE 9.9 G 14||76°F||71°F||1008.9 hPa|
|RLIT2||12 mi||56 min||E 8.9 G 9.9||75°F||71°F||1009.3 hPa|
|PMNT2||34 mi||50 min||77°F||74°F||1008.9 hPa|
|42045 - PI-745 TABS K||36 mi||98 min||SE 3.9 G 3.9||71°F||71°F||1010.5 hPa|
Wind History for South Padre Island C.G Station, TX(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Port Isabel, Port Isabel-Cameron County Airport, TX||10 mi||45 min||E 15||6.00 mi||Overcast with Haze||81°F||71°F||72%||1008.4 hPa|
|Brownsville, Brownsville / South Padre Island International Airport, TX||20 mi||45 min||SSW 10||10.00 mi||Overcast||86°F||72°F||63%||1008.6 hPa|
Wind History from SPL (wind in knots)
|1 day ago||S||S||S||SW||NW||N||N||N||E||NE||E||E||SE||NW||S||S||S||Calm||Calm||SE||SE||SE||SE||SE|
|2 days ago||SE||SE||SE||SE||S||S||S||SW||NW||NW||SW||SW||S||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Queen Isabella Causeway (east end) |
Click for Map
Sun -- 04:16 AM CDT 1.04 feet High Tide
Sun -- 07:34 AM CDT Sunrise
Sun -- 08:28 AM CDT Moonrise
Sun -- 11:00 AM CDT 0.30 feet Low Tide
Sun -- 05:07 PM CDT 0.86 feet High Tide
Sun -- 07:39 PM CDT Sunset
Sun -- 08:56 PM CDT Moonset
Sun -- 10:50 PM CDT 0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
Click for Map
Sun -- 03:40 AM CST 1.07 feet High Tide
Sun -- 06:36 AM CST Sunrise
Sun -- 07:30 AM CST Moonrise
Sun -- 10:00 AM CST 0.30 feet Low Tide
Sun -- 04:16 PM CST 0.91 feet High Tide
Sun -- 06:40 PM CST Sunset
Sun -- 07:57 PM CST Moonset
Sun -- 09:56 PM CST 0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of SouthCentralPlains 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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Brownsville, TX (15,3,4,5)(on/off)  Help
Ad by Google
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.