Friday, December13, 2019
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Marine Weather and Tides
Port Mansfield, TX

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:08AMSunset 5:41PM Friday December 13, 2019 1:17 AM CST (07:17 UTC) Moonrise 7:15PMMoonset 8:27AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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:201912131515;;267857 Fzus54 Kbro 130314 Cwfbro Coastal Waters Forecast National Weather Service Brownsville Tx 914 Pm Cst Thu Dec 12 2019 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. Gmz130-132-135-131515- 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- 914 Pm Cst Thu Dec 12 2019
Rest of tonight..North winds around 5 knots shifting northwest after midnight. Smooth on the bay.
Friday..West winds around 5 knots shifting southwest in the afternoon. Smooth on the bay.
Friday night..South winds around 5 knots shifting southwest after midnight. Smooth on the bay.
Saturday..Northwest winds around 5 knots becoming southeast in the afternoon. Smooth on the bay building to a light chop in the afternoon.
Saturday night..South winds 10 to 15 knots. A moderate chop on the bay.
Sunday..South winds 15 to 20 knots. Choppy on the bay.
Sunday night..South winds 10 to 15 knots. A moderate chop on the bay. Slight chance of showers.
Monday..South winds 10 to 15 knots. A moderate chop on the bay. Chance of showers.
Monday night..North winds 10 to 15 knots increasing to 15 to 20 knots after midnight. A moderate chop on the bay building to choppy after midnight. Slight chance of showers.
Tuesday..North winds 20 to 25 knots becoming 15 to 25 knots in the afternoon. Rough on the bay.
Tuesday night..North winds 15 to 20 knots. Choppy on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 914 Pm Cst Thu Dec 12 2019
Synopsis..As high pressure builds across the western gulf of mexico tonight, seas will gradually subside through the night. Small craft should continue to exercise caution until conditions improve Friday afternoon. Lighter winds and lower seas will continue through Saturday before the next storm system deepens across the texas panhandle on Sunday. This will increase southerly flow across the western gulf and eventually bring the next cold front through the region Monday into Tuesday. Hazardous conditions will be possible Sunday through Wednesday.


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 130538 AAC AFDBRO

Area Forecast Discussion . UPDATED National Weather Service Brownsville TX 1138 PM CST Thu Dec 12 2019

DISCUSSION. Updated for latest aviation discussion below.

AVIATION. Surface high pressure will continue to settle over the region tonight with clear skies in place. This will combine with a relatively dry layer in the low levels, resulting in the development of fog overnight. Dense fog will be possible, especially in the lower RGV from BRO to HRL, before sunrise. Therefore, a period of IFR to LIFR visibilities continue to be possible. By mid-morning, conditions will improve and VFR conditions should prevail.

PREV DISCUSSION. /issued 629 PM CST Thu Dec 12 2019/

DISCUSSION . Made an adjustment to the forecast this evening to include areas of fog across all inland locations tonight into Friday morning. Winds have already begun to calm in the Mid Valley as surface high pressure settles over the region. In addition, very dry air will advect into the region in the low levels, moving over a relatively moist surface. The current limiting factor for sufficient radiational cooling is a thick cirrus layer blanketing the eastern half of the CWA. This is expected to clear out from west to east late this evening, allowing dew point depressions to fall. There is the possibility of dense fog, which is particularly noted in the latest SREF guidance.

PREV DISCUSSION . /issued 547 PM CST Thu Dec 12 2019/

DISCUSSION . Updated for latest aviation discussion below.

AVIATION . Surface high pressure will settle over the region tonight with clouds expected to clear. This will combine with a relatively dry layer in the low levels, resulting in the development of fog overnight. Dense fog will be possible, especially in the lower RGV from BRO to HRL, before sunrise. Therefore, a period of IFR to LIFR visibilities will be possible. By mid-morning, conditions improve and VFR conditions should prevail.

PREV DISCUSSION . /issued 249 PM CST Thu Dec 12 2019/

SHORT TERM (Tonight through Friday Night): Cool, though near normal weather will continue tonight in a benign pattern with light winds and low temperatures in the 40s and 50s. Patchy fog likely will develop across the area, with patches of locally dense fog possible. Temperatures will warm to near or slightly above normal on Friday, in the 70s to lower 80s, with upper 40s to lower or mid 50s Friday night. Weak coastal troughing will persist tonight before breaking down on Friday. A weak mid level trough axis will lift over Texas and will be replaced by a stable northwest mid level flow and lower column moisture. Winds will remain light, shifting to southwest Friday to Friday night. This will help support the warmer Friday temperatures, and later on Saturday. Low level moisture will recover along with temperatures, and patchy fog could again develop Friday night. Overall, however, quiet weather will prevail with negligible rain chances as high pressure dominates over the region.

LONG TERM (Saturday through Thursday): The global models are in good agreement with the upper air patten across the United States Saturday with a 500mb trough across the eastern United States and a west to northwest flow aloft across south Texas. Low to mid level moisture will be limited across southwest TX through the weekend into early next even as a 500mb trough develops across the west-central U.S. Monday and moves eastward Tuesday. This upper level trough will bring a cold front through the Rio Grande Valley early Mon night and a chance of showers mainly across the coastal sections Mon afternoon into Mon evening. High temperatures will generally be in the 80s Saturday through Monday before cooler air advects into the area Mon night into Tuesday. Temperatures will be below normal through the rest of the forecast period with dry conditions as surface high pressure settles into the state Wednesday and shifts eastward Thursday.

MARINE (Tonight through Friday night): Lingering high seas prevail offshore at Buoy020, but conditions are slowly improving. Should be able to drop the small craft advisory later today. Winds and seas will further decrease through Friday night as broad high pressure remains over the northwest Gulf.

Saturday through Tuesday . Light south to southwest winds will prevail across the coastal waters Saturday with surface low pressure across west Texas. Winds will increase Sat night as the pressure gradient increases across the lower Texas coast. Moderate to strong south winds will develop offshore the lower Texas coast providing at least SCEC conditions if not SCA conditions. Small craft advisories will likely be needed for the coastal waters Sunday as strong south winds develop across the lower Texas coast. Winds will diminish Monday as the pressure gradient weakens ahead of a cold front moving into south Texas. The front will move through the coastal waters Mon night and very strong north to northeast winds will develop with gusts near gale force likely. Strong north winds will prevail across the lower Texas Tuesday in the wake of the cold front. Gale warnings may be needed for the offshore waters Mon night into Tues morning Otherwise. small craft advisories will be needed for all of the coastal waters Mon night into Tuesday.

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

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

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMNT2 2 mi53 min 55°F 61°F1018.3 hPa
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 18 mi53 min W 2.9 G 2.9 56°F 57°F1017.7 hPa
BZST2 35 mi53 min NNW 5.1 G 6 62°F 64°F1016.5 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 35 mi47 min NW 8 G 8
PTIT2 - 8779770 - Port Isabel, TX 35 mi53 min WNW 5.1 G 6 59°F 64°F1018.4 hPa
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX 48 mi27 min WNW 5.8 G 9.7 69°F 74°F6 ft1017.2 hPa66°F

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 mi25 minSSW 34.00 miFair52°F52°F100%1018 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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Last 24hrNW9NW6NW4NW8NW7NW7NW7NW7NW7NW7NW6NW6Calm3NE4NE6NE5NE4NE3CalmCalmNW3CalmSW3
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2 days agoS13S11S8S10S6SW3CalmN4N22
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Tide / Current Tables for Padre Island (South), Texas
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Padre Island (South)
Click for Map
Fri -- 07:06 AM CST     Sunrise
Fri -- 08:25 AM CST     Moonset
Fri -- 08:55 AM CST     -0.57 feet Low Tide
Fri -- 05:38 PM CST     Sunset
Fri -- 06:41 PM CST     1.86 feet High Tide
Fri -- 07:14 PM CST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.31.10.90.60.3-0-0.3-0.5-0.6-0.5-0.30.10.50.91.21.51.71.81.91.81.71.61.6

Tide / Current Tables for Padre Island (South), Texas (2)
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Padre Island (South)
Click for Map
Fri -- 12:51 AM CST     1.26 feet High Tide
Fri -- 07:06 AM CST     Sunrise
Fri -- 08:25 AM CST     Moonset
Fri -- 08:36 AM CST     -0.54 feet Low Tide
Fri -- 05:38 PM CST     Sunset
Fri -- 06:37 PM CST     1.46 feet High Tide
Fri -- 07:14 PM CST     Moonrise
Fri -- 09:44 PM CST     1.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.31.21.10.90.50.1-0.3-0.5-0.5-0.4-0.200.30.60.91.21.41.41.51.41.31.31.3

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 (2,6,7,8)
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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.