Monday, September20, 2021
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Marine Weather and Tides
Port Mansfield, TX

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:17AMSunset 7:31PM Sunday September 19, 2021 11:12 PM CDT (04:12 UTC) Moonrise 6:08PMMoonset 4:54AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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:202109200900;;883178 Fzus54 Kbro 200215 Cwfbro Coastal Waters Forecast National Weather Service Brownsville Tx 915 Pm Cdt Sun Sep 19 2021 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. Gmz130-132-135-200900- 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- 915 Pm Cdt Sun Sep 19 2021
Rest of tonight..South winds 10 to 15 knots. A moderate chop on the bay.
Monday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Monday night..South winds 10 to 15 knots. A moderate chop on the bay.
Tuesday..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. Slight chance of showers and Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots becoming north 10 to 15 knots after midnight. A light chop on the bay building to a moderate chop after midnight. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Wednesday..North winds 15 to 20 knots. Choppy on the bay. Chance of showers and Thunderstorms through the day.
Wednesday night..Northeast winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. A moderate chop on the bay subsiding to a light chop after midnight.
Thursday..Northeast winds 10 to 15 knots. A moderate chop on the bay.
Thursday night..Northeast winds 5 to 10 knots. A light chop on the bay.
Friday..Northeast winds 5 to 10 knots. A light chop on the bay.
Friday night..East winds 5 to 10 knots diminishing to around 5 knots after midnight. A light chop on the bay subsiding to smooth after midnight.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 915 Pm Cdt Sun Sep 19 2021
Synopsis..Weak high pressure located in the gulf of mexico will continue to provide light and a south to southeast wind with low seas through Monday. Low pressure will develop over the central plains Monday afternoon, which will act to strengthen the pressure gradient across the lower texas coastal waters. This will lead to increasing winds and seas through the middle of the week. Showers and Thunderstorms will develop across the coastal waters Tuesday and increase in coverage Tuesday night into Wednesday as a weak cold front moves offshore the lower texas coast Wednesday morning.


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 192337 AFDBRO

Area Forecast Discussion National Weather Service Brownsville TX 637 PM CDT Sun Sep 19 2021

DISCUSSION. Updated for latest aviation discussion below.

AVIATION. VFR conditions are expected to prevail through the majority of the TAF period. A touch of fog may develop and reduce visibility a bit around KHRL early Monday morning, but it shouldn't be widespread nor linger much past sunrise. Subsidence and dry air will keep Deep South Texas in VFR conditions Monday with winds picking up around lunchtime.

PREV DISCUSSION. /issued 250 PM CDT Sun Sep 19 2021/

SHORT TERM (Tonight through Monday Night): Subsidence is expected through the short term due to a 500mb trough across eastern Texas into the Lower Mississippi Valley and northwesterly winds aloft. This will continue to lead to hot and dry conditions across the CWA with light to moderate south to southeasterly winds. Temperatures on Monday will be hot again with highs in the 100s out west to 90s east with heat indices between 105 and 110 across most areas. A few isolated spots in Starr and Zapata counties could briefly see heat indices exceeding 110. Overnight lows tonight and Monday night will fall into the 70s across the region.

LONG TERM (Tuesday through Sunday): A deep mid-level trough moves over the northern plains Tuesday into Wednesday and brings one of the first cold fronts of the season to Deep South Texas. The strong positively-tilted trough allows for a surface cold front to move through southern Texas bringing in below normal temperatures and rain for overnight Tuesday into Wednesday. As far as model guidance for the front goes, ECMWF/GFS have a strong front moving into the CWA at 6z while the NAM has a slower and weaker front moving into the area at 9z. Went with a combination of the NBM and NAM to capture the best timing for the front. Rain chances increase by 12z Tuesday and are forecast to dissipate around 0z Thursday. PWAT values are at about 2 inches for the most of the CWA. Temperatures for Tuesday afternoon will be above normal for the area before the front moves through that night. As for Wednesday and Thursday, expect temperatures to be in the mid and upper 80s for Deep South Texas with lows in the lower 60s and dewpoints dropping into the upper 50s. As the trough exits the region, a ridge builds in the SW CONUS by Friday which allows for much drier conditions and near normal temperatures and dewpoints through the rest of the period.

MARINE (Tonight through Monday Night): Favorable marine conditions are expected through the period. Light to moderate winds will prevail through Monday night, with seas of generally 1 to 3 ft increasing to 2 to 4 ft Monday evening. An isolated shower or thunderstorm on Monday night could lead to localized increased winds and elevated seas.

Tuesday through Sunday: For the start of the forecast period, weak to moderate seas are expected between with waves between 2-3 feet and light to moderate winds. Once the front pushes through the area, showers and thunderstorms are expected over the Gulf Waters. Winds will increase causing seas to increase to about 4- 5 feet for Wednesday. Small Craft Exercise Caution may be needed for Wednesday and Thursday following the FROPA.

PRELIMINARY POINT TEMPS/POPS. BAYVIEW/PORT ISABEL 77 94 78 93 / 0 10 0 20 BROWNSVILLE 78 96 79 96 / 0 0 10 30 HARLINGEN 75 98 77 95 / 0 0 0 20 MCALLEN 76 100 78 98 / 0 0 0 20 RIO GRANDE CITY 75 104 76 103 / 0 0 0 20 SOUTH PADRE ISLAND 82 89 83 88 / 0 10 10 20

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

This product is also available on the web at: https://weather.gov/rgv

Short-Term/Aviation: 58-Reese/55-Adams Long-Term/Radar/Upper-Air: 59-GB


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PMNT2 2 mi54 min 84°F 89°F1012.3 hPa
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 18 mi54 min SE 14 G 16 84°F 89°F1011.9 hPa
RLIT2 20 mi54 min SE 13 G 16 85°F 88°F1011.2 hPa
BZST2 35 mi54 min SSE 13 G 15 85°F 1011.3 hPa
PCGT2 - 8779748 - South Padre Island CGS, TX 35 mi54 min SSE 12 G 15 84°F 89°F1011.9 hPa
PTIT2 - 8779770 - Port Isabel, TX 35 mi54 min SSE 9.9 G 13 84°F 88°F1013.4 hPa
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX 48 mi32 min SSE 16 G 18 84°F 86°F1011.9 hPa77°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 mi20 minSE 610.00 miFair79°F75°F88%1012 hPa

Link to 5 minute data for KHRL

Wind History from HRL (wind in knots)
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Last 24hrS4SE3S3S4CalmCalmCalmCalmCalmW33W4344--E13
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1 day agoSE7S6S5S3CalmCalmCalmN3CalmCalmNW4CalmCalmNE5NE8NE10
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2 days agoE5E6CalmE3S4S3CalmSE4SE3SE3S9S10S9S9
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Tide / Current Tables for Padre Island (South), Texas
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Padre Island (South)
Click for Map
Mon -- 04:35 AM CDT     1.67 feet High Tide
Mon -- 06:51 AM CDT     Moonset
Mon -- 07:16 AM CDT     Sunrise
Mon -- 09:18 AM CDT     1.38 feet Low Tide
Mon -- 02:44 PM CDT     1.80 feet High Tide
Mon -- 06:54 PM CDT     Full Moon
Mon -- 07:26 PM CDT     Sunset
Mon -- 07:40 PM CDT     Moonrise
Mon -- 09:59 PM CDT     0.75 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.21.41.61.71.71.61.51.41.41.41.51.61.71.81.81.71.61.41.10.90.80.80.8

Tide / Current Tables for Padre Island (South), Texas (2)
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Padre Island (South)
Click for Map
Mon -- 04:52 AM CDT     1.56 feet High Tide
Mon -- 06:51 AM CDT     Moonset
Mon -- 07:16 AM CDT     Sunrise
Mon -- 08:54 AM CDT     1.06 feet Low Tide
Mon -- 03:50 PM CDT     1.61 feet High Tide
Mon -- 06:54 PM CDT     Full Moon
Mon -- 07:26 PM CDT     Sunset
Mon -- 07:40 PM CDT     Moonrise
Mon -- 09:14 PM CDT     0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.711.21.41.51.61.41.31.11.11.11.21.31.41.51.61.61.51.20.90.60.50.50.6

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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