Thursday, February20, 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 6:27PM Thursday February 20, 2020 10:31 AM CST (16:31 UTC) Moonrise 5:10AMMoonset 3:57PM Illumination 10% Phase: Waning Crescent; Moon at 27 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:202002202200;;829633 Fzus54 Kbro 201511 Cwfbro Coastal Waters Forecast National Weather Service Brownsville Tx 911 Am Cst Thu Feb 20 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. Gmz130-132-135-202200- 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- 911 Am Cst Thu Feb 20 2020
.small craft advisory in effect through late tonight...
Rest of today..North winds 15 to 20 knots becoming 15 to 25 knots in the afternoon. Choppy on the bay building to rough in the afternoon. Patchy fog through the day. Chance of rain showers late in the morning. Patchy drizzle through the day. Rain showers likely in the afternoon.
Tonight..North winds 20 to 25 knots becoming 15 to 25 knots after midnight. Rough on the bay. Patchy fog. Chance of rain showers and patchy drizzle.
Friday..North winds 15 to 20 knots. Choppy on the bay.
Friday night..Northeast winds 10 to 15 knots diminishing to around 5 knots after midnight. A moderate chop on the bay subsiding to smooth after midnight.
Saturday..East winds 5 to 10 knots. A light chop on the bay.
Saturday night..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Sunday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Sunday night..South winds 10 to 15 knots. A moderate chop on the bay.
Monday..East winds 5 to 10 knots shifting north in the afternoon. A light chop on the bay. Slight chance of showers.
Monday night..Northeast winds 10 to 15 knots. A moderate chop on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 911 Am Cst Thu Feb 20 2020
Synopsis..Marine conditions will deteriorate today into tonight due to a strong surge of north winds and building seas. Gale force wind gusts will occur from late this afternoon through Friday morning across the gulf waters, and wave heights will become high. Hazardous marine conditions will linger through Friday night before gradually improving this weekend. A slight uptick in winds and seas will occur Sunday into Sunday night ahead of a Monday cold front.


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 201215 AAA AFDBRO

Area Forecast Discussion . UPDATED National Weather Service Brownsville TX 615 AM CST Thu Feb 20 2020

DISCUSSION. Updated for latest aviation discussion below.

AVIATION. Surface observations indicate overcast skies with LIFR to IFR ceilings while the KBRO radar shows increasing coverage of some light rain shower activity. Pockets of some patchy light drizzle also exists across portions of the Rio Grande Valley. The activity will lead to some restriction of visibility as well. These conditions will maintain through today and into tonight. North winds also increase to breezy levels today with gusts of up to around 25 knots. Ceilings may improve to MVFR levels late in the TAF period while the wind speeds remain of moderate to breezy levels.

PREV DISCUSSION. /issued 335 AM CST Thu Feb 20 2020/

SHORT TERM (Now Through Friday): The shallow cool airmass across Deep South Texas has yielded to overcast skies overnight featuring pockets of patchy drizzle, mist and occasional light rain due to isentropic lift as warm, southerly winds sit just above the cool layer. Additionally, a weak coastal low sits offshore along the residual stationary front. Temperatures have held in the 50s for most locations.

An even colder airmass then arrives today as reinforcing area of stronger high pressure builds south across Deep South Texas. Do expect for temperatures to remain rather steady throughout the morning before falling throughout the afternoon and for Thursday night. Additionally, winds will pick up to breezy levels with sustained winds of 15 to 25 mph with gusts of 25 to 35 mph. Rain chances will also increase into Thursday afternoon/evening with highest PoPs of around 50 to 60 percent. Activity is expected to remain light but will probably be more than just a drizzle. The rainfall amounts won't put much of a dent in the local drought conditions but up to a tenth, perhaps two tenths, of an inch is possible. Motorists should use caution as winds will be on the breezy side while roads may be slick from oil build up on the roadways. A chilly night is expected as temperatures will drop into the mid 40s inland with wind chills of near 40 degrees in the valley and the upper 30s across the ranchlands.

Expect for the rain chances to come to an end area wide by Friday morning as the overrunning pattern weakens with the 850 mb winds turning northerly. Drier air also begins to filter into the region and will allow for the clouds to gradually break from north to south. Cloud cover will be the most pesky across the lower valley and along portions of the coast. Very cool temperatures will be expected with most locations holding in the mid 50s. Locations further north where clouds break could potentially see a slightly larger diurnal range due to insolation. The winds are to subside Friday as well as the high pressure advances towards the east.

LONG TERM (Friday Night through Wednesday): Mid level ridging builds overhead Friday night with dry northwest flow aloft. Surface high pressure across the Lower Mississippi River Valley Friday evening will move eastward through the weekend. Low temperatures Friday night should fall into the 40s under mostly cloudy skies. Saturday will be mild with high temperatures reaching the mid to upper 60s with a mix of sun and clouds. A warm front advances northward Saturday night into Sunday. Low temperatures Saturday are expected to range from the mid 50s across the ranchlands to the low 60s near the coast. Sunday will be warm with highs climbing into the mid to upper 70s near the coast and into the 80s inland. Developing low pressure across west Texas will interact with broad high pressure across the Appalachians supporting moderate to breezy winds Sunday afternoon. Low temperatures Sunday night will be in the 60s with mostly cloudy skies. A fairly weak cold front will arrive Sunday night into Monday morning with reinforcing Plains colder air on Tuesday. Limited moisture should support a slight chance of showers near the coast on Monday. Otherwise, rain chances will remain low through the period. Another cold front surges into the deep south Texas Tuesday night into Wednesday morning. Temperatures are expected to be closer to normal Monday through Wednesday.

MARINE (Now through Friday): Seas of near 4 feet with northeast winds around 5 to 10 knots were reported at buoy42020 into and during the overnight so far. Patchy sea fog cannot be ruled out either. Marine conditions will quickly deteriorate from later this morning through tonight as an even stronger area of high pressure moves over the region. Strong north to northeasterly winds along with high seas will develop across the coastal waters. Frequent Gale force wind gusts develop by late this afternoon and continue into Friday morning across the coastal gulf waters. As a result, a Gale Warning is in effect from 3 pm today until 9 am Friday across the coastal gulf waters. A Small Craft Advisory is also in effect prior to the Gale Warning across the coastal gulf waters from 9 am this morning until 3 pm this afternoon. For the Laguna Madre, a Small Craft Advisory will be in effect from 9 am today until 6 am Friday. Despite slow improvement, hazardous marine conditions continue through Friday with additional Small Craft Advisories likely.

Friday night through Monday night . Marine conditions will steadily improve Friday night and through the weekend. Ongoing small craft advisory conditions on the Gulf waters will likely continue Friday night into Saturday due to high seas. High pressure across the northern Gulf should support moderate northeast winds initially Friday evening with winds becoming light and veering to the east Friday night and Saturday. Light to moderate south to southeast winds and low to moderate seas will prevail Saturday night through Sunday night. Small craft exercise caution conditions will likely be needed by Sunday on the Laguna Madre and Sunday night for the Gulf waters. The passage of a weak front will shift winds to north on Monday.

BRO WATCHES/WARNINGS/ADVISORIES. TX . None. GM . Small Craft Advisory from 9 AM this morning to 6 AM CST Friday for GMZ130-132-135.

Small Craft Advisory from 9 AM this morning to 3 PM CST this afternoon for GMZ150-155-170-175.

Gale Warning from 3 PM this afternoon to 9 AM CST Friday for GMZ150-155-170-175.



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

Aviation/Short Term . Brady/62 Long Term/Upper Air . Caceres/63


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMNT2 2 mi50 min 55°F 71°F1023.5 hPa
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 18 mi50 min 54°F 68°F1023.2 hPa
BZST2 35 mi50 min 59°F 68°F1020.8 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 35 mi44 min 59°F 1021.7 hPa
PTIT2 - 8779770 - Port Isabel, TX 35 mi50 min 59°F 69°F1022.3 hPa
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX 48 mi22 min N 21 G 25 61°F 72°F1022.6 hPa60°F

Wind History for Rincon Del San Jose, TX
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Harlingen, Rio Grande Valley International Airport, TX26 mi40 minN 148.00 miOvercast54°F53°F97%1023.5 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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Last 24hrN9N10N10NW8N10N9N10N9N7N10N9NW8NW11NW9NW9NW11NW11NW12NW11N15N11N12N11N14
1 day agoS19
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------S19
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------E7E8E7E7----------------NW14N11
2 days agoS19S23
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S16S16--S17S15S23
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Tide / Current Tables for Queen Isabella Causeway (east end), Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Queen Isabella Causeway (west end), Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Brownsville, TX (11,2,3,4)
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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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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.