Thursday, July2, 2020
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Marine Weather and Tides
Rio Hondo, TX

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:41AMSunset 8:28PM Thursday July 2, 2020 4:33 AM CDT (09:33 UTC) Moonrise 5:15PMMoonset 3:20AM Illumination 89% Phase: Waxing Gibbous; Moon at 12 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- 407 Am Cdt Thu Jul 2 2020
.small craft should exercise caution...
Today..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon. Haze.
Tonight..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight. Haze.
Friday..Southeast winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon.
Friday night..Southeast winds 10 to 15 knots becoming south 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Saturday..South winds 5 to 10 knots becoming southeast 10 to 15 knots in the afternoon. A light chop on the bay building to a moderate chop in the afternoon.
Saturday night..South winds 10 to 15 knots. A moderate chop on the bay.
Sunday..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Sunday night..South winds 10 to 15 knots. A moderate chop on the bay.
Monday..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy in the afternoon.
Monday night..Southeast winds 15 to 20 knots becoming south 10 to 15 knots after midnight. Choppy on the bay subsiding to a moderate chop after midnight.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 407 Am Cdt Thu Jul 2 2020
Synopsis..Slightly adverse marine conditions will persist today through the evening across the lower texas coastal waters with moderate southeast winds. These winds will diminish tonight and into the weekend with a weakening of the overall pressure gradient, leading to more favorable marine conditions. A light to moderate onshore flow and slight to moderate seas will prevail into the weekend and early next week as high pressure settles across the western gulf.


7 Day Forecast for Marine Location Near Rio Hondo, TX
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location: 26.26, -97.53     debug


Area Discussion for - Brownsville, TX
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FXUS64 KBRO 020858 AFDBRO

Area Forecast Discussion National Weather Service Brownsville TX 358 AM CDT Thu Jul 2 2020

.SHORT TERM (Now through Friday): The short term period will be rather tranquil under a ridging pattern. An elongated mid level ridge will continue to edge further westward across the central CONUS into this weekend, and surface high pressure currently over the north central Gulf will also slide westward over the northwestern Gulf by Friday. Subsidence will help to suppress any mentionable rain chances into the weekend, along with the intrusion of drier air at mid to upper levels. Southeasterly winds will become breezy around mid morning today and gust up to around 20 knots. As the surface ridge moves overhead on Friday, the pressure/thermal gradient weakens allowing for winds to be slightly calmer than what will be seen today. Hot temperatures and elevated boundary level moisture will lead to mild and muggy nights and hot and humid days. Heat index values will range between 105 to 110 degrees in the Rio Grande Valley each afternoon. NASA GMAO guidance continues to show another round of Saharan dust moving into the region this morning, potentially leading to persistent haze and reduced air quality through this evening.

.LONG TERM (Friday Night through Wednesday): Mid-level ridge axis initially over Texas Friday night will retrograde westward through the holiday weekend as a mid-level trough/weakness develops over the northeast Gulf of Mexico. This weather pattern will continue to produce well above normal temperatures and rain- free conditions across deep south Texas through most of the period. Rain chances may increase across the area early next week as the 500 mb weakness/upper level low drifts over the Gulf and nudges into the CWA. However, moisture appears very limited, so will mention a slight chance of convection on Tuesday, which may be a little generous. Surface high pressure settles across the western Gulf of Mexico resulting in a fairly weak pressure gradient through much of the weekend. Generally light winds are expected each night with moderate to gusty southeast winds each afternoon.

The anticipated heat index readings through the longer range forecast period will likely remain below Advisory levels with most of the peak heat indices ranging from 105 to 110. However, some readings over the far western counties could touch or briefly exceed the 110 degree mark.

.MARINE (Now through Friday): Marine conditions will continue to be slightly adverse today with southeast winds gusting to around 20 knots. Small craft should exercise caution across the lower Texas coastal waters through this evening. High pressure over the northern Gulf of Mexico will interact with a general area of low pressure over Mexico to generate moderate southeasterly winds today and will weaken overnight and into tomorrow, effectively decreasing the winds along with the seas.

Friday Night through Wednesday: The pressure gradient will remain fairly weak through the holiday weekend as high pressure settles across the western Gulf. This will maintain light to moderate winds and low to moderate seas through the weekend. The pressure gradient is expected to strengthen early next week and may support exercise caution conditions along the lower Texas coast by Monday.

PRELIMINARY POINT TEMPS/POPS. BAYVIEW/PORT ISABEL 93 77 93 77 / 0 0 0 0 BROWNSVILLE 94 78 94 77 / 0 0 0 0 HARLINGEN 97 75 97 75 / 0 0 0 0 MCALLEN 98 76 99 76 / 0 0 0 0 RIO GRANDE CITY 103 76 102 75 / 0 0 0 0 SOUTH PADRE ISLAND 89 81 89 80 / 0 0 0 0

BRO WATCHES/WARNINGS/ADVISORIES. TX . None. GM . None.

This product is also available on the web at: HTTP://WEATHER.GOV/RGV

Short Term/Aviation . 69-Farris Long Term/Upper Air . 63


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMNT2 21 mi46 min 82°F 87°F1012.8 hPa
PTIT2 - 8779770 - Port Isabel, TX 22 mi46 min SSE 12 G 16 81°F 83°F1014.6 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 23 mi46 min S 12 G 15 80°F 1012.3 hPa
BZST2 24 mi46 min S 11 G 13 80°F 78°F1011.6 hPa
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 38 mi46 min S 21 G 25 83°F 86°F1012.2 hPa

Wind History for Port Isabel, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Harlingen, Rio Grande Valley International Airport, TX8 mi42 minS 1110.00 miOvercast81°F78°F91%1012.4 hPa
Port Isabel, Port Isabel-Cameron County Airport, TX12 mi41 minSSE 129.00 miMostly Cloudy82°F77°F85%1012.4 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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1 day agoS12S14SE13S13S18S21
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SE10SE16SE15S12S11SE8SE8SE10
2 days agoS13
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Tide / Current Tables for Port Isabel, Texas
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Port Isabel
Click for Map
Thu -- 04:18 AM CDT     Moonset
Thu -- 05:37 AM CDT     1.41 feet High Tide
Thu -- 06:40 AM CDT     Sunrise
Thu -- 06:13 PM CDT     Moonrise
Thu -- 08:18 PM CDT     -0.69 feet Low Tide
Thu -- 08:24 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.711.21.31.41.41.41.31.31.21.21.110.80.50.2-0.1-0.4-0.6-0.7-0.7-0.5-0.2

Tide / Current Tables for Port Isabel, Texas (2)
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Port Isabel
Click for Map
Thu -- 04:18 AM CDT     Moonset
Thu -- 05:46 AM CDT     1.37 feet High Tide
Thu -- 06:40 AM CDT     Sunrise
Thu -- 09:39 AM CDT     1.18 feet Low Tide
Thu -- 01:02 PM CDT     1.18 feet High Tide
Thu -- 06:13 PM CDT     Moonrise
Thu -- 08:18 PM CDT     -0.58 feet Low Tide
Thu -- 08:24 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.60.91.11.31.41.41.31.21.21.21.21.21.21.210.80.4-0.1-0.4-0.6-0.6-0.4-0.2

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Brownsville, TX (5,6,7,8)
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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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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 numerous 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.