Friday, August14, 2020
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Marine Weather and Tides
Port Mansfield, 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 7:01AMSunset 8:08PM Friday August 14, 2020 11:08 AM CDT (16:08 UTC) Moonrise 1:33AMMoonset 3:40PM Illumination 19% Phase: Waning Crescent; Moon at 25 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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GMZ132 Expires:202008142130;;441003 Fzus54 Kbro 141445 Cwfbro Coastal Waters Forecast National Weather Service Brownsville Tx 945 Am Cdt Fri Aug 14 2020 Lower Texas Coastal Waters From Baffin Bay To The Mouth Of The Rio Grande Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz130-132-135-142130- 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- 945 Am Cdt Fri Aug 14 2020
Rest of today..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 on the bay in the afternoon.
Tonight..South winds 10 to 15 knots. A moderate chop on the bay.
Saturday..South winds 10 to 15 knots becoming southeast 15 to 20 knots in the afternoon. A moderate chop on the bay building to choppy bay waters in the afternoon.
Saturday 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 on the bay after midnight.
Sunday..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 on the bay in the afternoon.
Sunday 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 on the bay after midnight.
Monday..South winds around 5 knots becoming east in the afternoon. A light chop on the bay.
Monday night..Southeast winds 5 to 10 knots becoming southwest after midnight. A light chop on the bay. Slight chance of showers and Thunderstorms.
Tuesday..Northwest winds around 5 knots becoming northeast in the afternoon. A light chop on the bay. Slight chance of showers and Thunderstorms.
Tuesday night..East winds 5 to 10 knots becoming south after midnight. A light chop on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 945 Am Cdt Fri Aug 14 2020
Synopsis..Favorable marine conditions are expected through the next several days with high pressure in control over the western gulf of mexico.


7 Day Forecast for Marine Location Near Port Mansfield, TX
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location: 26.54, -97.4     debug


Area Discussion for - Brownsville, TX
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FXUS64 KBRO 141108 AFDBRO

Area Forecast Discussion National Weather Service Brownsville TX 608 AM CDT Fri Aug 14 2020

DISCUSSION. Updated for latest aviation discussion below.

AVIATION. Fair flying conditions for all of Deep South Texas and the three Rio Grande Valley airports as high pressure remains in control. VFR conditions expected the next 24 hours with generally light southeast to south winds with an occasional afternoon gusts up to 20 knots.

PREV DISCUSSION. /issued 310 AM CDT Fri Aug 14 2020/

SHORT TERM (Now through Saturday): Persistence is the best forecast with latest model suite insisting that the position of the 500mb subtropical ridge remains anchored over Arizona extending well into Texas. Atmosphere continues unusually dry for Mid-August with 1000-500mb mean RH ranging from 30-45 percent today and Saturday, hardly enough to warrant any mentionable PoPs. Surface pressure gradient remains slack as broad surface ridge over the Gulf is rather weak but sufficient to preserve slight afternoon breezes. Finally, temperatures stay the course with mid- August normals having been met for much of this week and will be maintained through the first half of the weekend. Also, heat index values remain in check ranging from 100 to 107 due to forecast of lower daytime relative humidity.

LONG TERM (Saturday Night through Thursday): The subtropical ridge holds through the weekend across Texas. A shower or thunderstorm may develop along the seabreeze Monday, as moisture increases across South Texas. The ridge hikes northwestward across the Rockies into early next week as a trough across the eastern CONUS deepens through the Southeast. A frontal boundary tries to work into Texas Monday night into Tuesday, with a brief and weak wind shift possibly reaching into Deep South Texas. Coastal low pressure develops and sits along the lower Texas coast through late next week.

The best chance of rain still resides along the seabreeze Tuesday through Thursday, including whatever boundary collisions happen as a result of the seabreeze, wind shift, and any remnant outflow boundaries working south. Mid-level disturbances rounding the ridge and western edge of the trough would also add bouts of instability to the mix through late week. PWAT values climb to around 1.8 to 2.0 inches Tuesday afternoon into Tuesday evening, leading to the potential for slow moving efficient rain producing showers or thunderstorms, if they can develop. Temperatures remain warm and seasonal this weekend to a couple of degrees below normal by mid next week. The calm conditions Monday night, combined with increasing moisture, may help fog develop and settle in, especially across the northern ranchlands. Patchy fog may be possible into mid or late next week with continued light to calm winds at night.

MARINE (Now through Saturday): Weak high pressure over the Gulf of Mexico holds firm with little change in the overall Marine forecast for the Lower Texas coast. Light onshore flow providing favorable seas offshore and a light chop on the bay can be expected today and Saturday.

Saturday Night through Thursday: High pressure remains in control across the Gulf of Mexico through this weekend, with light to moderate southeasterly onshore flow generally expected through the period, yielding very favorable marine conditions. A weak wind shift and frontal boundary may approach the region Monday night into Tuesday. The chance of showers and thunderstorms increases Monday night and continues into Thursday as moisture and instability increase across the northeastern Gulf of Mexico with a weak coastal trough of low pressure developing.

PRELIMINARY POINT TEMPS/POPS. BAYVIEW/PORT ISABEL 93 79 93 79 / 0 0 0 0 BROWNSVILLE 95 79 96 79 / 0 0 0 0 HARLINGEN 97 77 98 77 / 0 0 0 0 MCALLEN 99 78 100 78 / 0 0 0 0 RIO GRANDE CITY 102 77 102 77 / 0 0 0 0 SOUTH PADRE ISLAND 88 83 89 82 / 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

59-GB . Short Term/Aviation 56-Hallman . Long Term


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX 48 mi88 min 2 ft

Wind History for Rincon Del San Jose, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Harlingen, Rio Grande Valley International Airport, TX26 mi76 minS 810.00 miPartly Cloudy86°F77°F75%1014 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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SE17SE14SE13SE12SE10SE6SE7------------SE4SE4------

Tide / Current Tables for Padre Island (South), Texas
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Padre Island (South)
Click for Map
Fri -- 02:32 AM CDT     Moonrise
Fri -- 03:34 AM CDT     1.44 feet High Tide
Fri -- 07:01 AM CDT     Sunrise
Fri -- 04:37 PM CDT     Moonset
Fri -- 06:04 PM CDT     -0.23 feet Low Tide
Fri -- 08:04 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.31.41.41.41.41.41.31.31.21.110.80.60.40.2-0-0.2-0.2-0.2-0.10.20.40.7

Tide / Current Tables for Padre Island (South), Texas (2)
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Padre Island (South)
Click for Map
Fri -- 02:32 AM CDT     Moonrise
Fri -- 03:52 AM CDT     1.45 feet High Tide
Fri -- 07:01 AM CDT     Sunrise
Fri -- 04:37 PM CDT     Moonset
Fri -- 05:47 PM CDT     -0.04 feet Low Tide
Fri -- 08:04 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.31.41.41.41.41.41.41.41.31.31.21.10.90.70.40.1-0-000.10.30.50.8

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 (12,3,4,5)
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Ground Weather Radar Station Brownsville, TX
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Gulf Stream Current


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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 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.