Marine Weather and Tides
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 7:49AM||Sunset 7:59PM||Thursday September 21, 2017 4:18 PM CDT (21:18 UTC)||Moonrise 7:06AM||Moonset 7:17PM||Illumination 1%|
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7 Day Forecast for Marine Location Near Guadalupe-Guerra, TXHourly EDIT Help
Area Discussion for - Brownsville, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus64 kbro 212018|
area forecast discussion
national weather service brownsville tx
318 pm cdt Thu sep 21 2017
.Short term (now through Friday night): scattered showers and
thunderstorms have developed along the coastal counties this
afternoon, in part due to the coastal seabreeze, as well as a weak
shortwave trough moving overhead today. 12z sounding this morning
from bro measured 2.20" of precipitable water and the non-
operational, preliminary goes-16 satellite imagery was in decent
agreement this afternoon with 2.00-2.20" across the area.
Therefore, any showers and storms that develop will have the
potential to produce locally heavy downpours. Tonight the
shortwave will exit the area and shower activity should decrease
in intensity tonight.
Friday, flow aloft will be weak with mean broad ridging affecting
south texas, however isolated showers and storms will be possible
along the seabreeze in the morning and afternoon. Nam MOS guidance
is showing much higher pops than the ECMWF and gfs, but think the
lack of upper level support would inhibit more scattered activity as
a broad low over the central gulf of mexico will be to our east.
Temperatures will likely be above normal again with highs in the
upper 90s to near 100f from mcallen through the upper valley.
.Long term (Saturday through Thursday): south texas will be under
part of the 500mb ridge across the northeast united states
extending into east tx Saturday with a 500mb trough across the
western u.S. And a 500mb low across the northeast gulf of mexico.
Low to mid level moisture will be high across northern mexico into
west tx through the weekend into early next week. Will likely see
isolated seabreeze convection across the coastal sections of the
cwa Saturday and Sunday. Low to mid level moisture is expected to
increase across southwest tx Monday and will mention a slight
chance to chance of showers and thunderstorms early next
week... Mainly across the coastal sections of the cwa. The 500mb
trough across the western u.S. Will move little through the middle|
of next week. A weak cold front across the central u.S. Monday
will make its way into the tx panhandle Tuesday and into north tx
Wednesday. Moisture will pool along and ahead of the front and
this will provide a chance of showers and thunderstorms across
portions of south tx Tuesday through the rest of the forecast
.Marine (now through Friday night): surface high pressure over the
northeast gulf of mexico will maintain light to moderate
southeast flow through the short term with seas at 2 to 4 feet.
Periods of isolated showers and storms will be possible,
especially in the overnight hours.
Saturday through Tuesday... Light to moderate southeast winds will
prevail across the coastal waters Saturday with surface high
pressure across the eastern united states and surface low pressure
across colorado. The pressure gradient will remain weak across
the western gulf of mexico Sunday before increasing on Monday as
low pressure develops across west texas. Light to moderate
southeast winds across the lower texas coast Sunday will increase
to moderate on Monday and continue through Tuesday.
Preliminary point temps pops
Bayview port isabel 79 92 79 90 20 20 10 20
brownsville 79 93 79 92 20 20 10 20
harlingen 78 96 78 94 20 20 10 20
mcallen 80 99 79 96 20 20 10 20
rio grande city 79 99 78 98 10 10 10 20
south padre island 79 88 81 87 20 20 20 20
Bro watches warnings advisories
This product is also available on the web at:
http: weather.Gov rgv
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Wind Forecast for Brownsville, TX (17,4,5,8)(on/off)  Help
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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.