Tuesday, January26, 2021
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Marine Weather and Tides
Rio Hondo, TX

Version 3.4
NOTICE
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 7:16AMSunset 6:10PM Tuesday January 26, 2021 10:00 PM CST (04:00 UTC) Moonrise 4:16PMMoonset 5:37AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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- 408 Pm Cst Tue Jan 26 2021
.dense fog advisory in effect until 8 am cst Wednesday...
.small craft advisory in effect Wednesday morning...
Tonight..Northeast winds 5 to 10 knots becoming east after midnight, then becoming northwest 10 to 15 knots late in the night. A moderate chop on the bay. Areas of dense fog in the evening, then areas of fog after midnight. Visibility 1 nm or less.
Wednesday..North winds 20 to 25 knots decreasing to 15 to 20 knots in the afternoon. Rough on the bay. Areas of dense fog in the morning. Visibility 1 nm or less in the morning.
Wednesday night..North winds 10 to 15 knots. A moderate chop on the bay.
Thursday..Northeast winds 10 to 15 knots. A moderate chop on the bay.
Thursday night..East winds 10 to 15 knots. A moderate chop on the bay.
Friday..Southeast winds 10 to 15 knots. A moderate chop on the bay.
Friday night..Southeast winds 15 to 20 knots. Choppy on the bay.
Saturday..South winds 15 to 20 knots. Choppy on the bay.
Saturday night..South winds 10 to 15 knots. A moderate chop on the bay.
Sunday..North winds 10 to 15 knots. A moderate chop on the bay.
Sunday night..Northeast winds 10 to 15 knots. A moderate chop on the bay.
GMZ100 Synopsis For Baffin Bay To Rio Grande Out 60 Nm- 408 Pm Cst Tue Jan 26 2021
Synopsis..Marine hazards include dense for for all coastal waters tonight into early Wednesday morning, a gale warning that goes in effect for the gulf waters 6 am Wednesday and a small craft advisory for the laguna madre also starting 6 am Wednesday. The fog lifts and the stronger winds begin as a cold front moves through the coastal waters Wednesday morning. A few gusts to gale force are possible for the laguna madre with more frequent gusts over the gulf waters. High pressure will then begin to settle in over the southeastern united states on Thursday and Friday which will favor light to moderate easterly winds. A stronger pressure gradient is expected for the weekend.


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 262332 AAB AFDBRO

Area Forecast Discussion . UPDATED National Weather Service Brownsville TX 532 PM CST Tue Jan 26 2021

DISCUSSION. Issued a dense fog advisory for Coastal Cameron with South Padre Island socked in the marine fog. Areas just west of the Laguna Madre, Port Isabel and Bayview, are not in the dense fog but visibilities are likely between 2 and 4 miles. Models are suggesting the fog will move inland a few hours after sunset and will have to likely expand the advisory to include inland areas of Cameron and Willacy.

DISCUSSION. Updated for latest aviation discussion below.

AVIATION. Dense fog is currently in place along the immediate lower Texas coast and over the adjacent Gulf waters. Conditions favor the dense advection fog to move inland a few hours after sunset and persist until a cold front moves through between 11 and 14Z Wednesday. VFR conditions are expected until around 03Z then rapidly deteriorate to IFR/LIFR east to west. Fog and ceilings lifts steadily after the cold front with northwest winds increasing through the morning hours with gusts as high as 25 knots maybe stronger at KBRO.

PREV DISCUSSION. /issued 420 PM CST Tue Jan 26 2021/

DISCUSSION . Vsbl satl imagery and webcams indicate that the stubborn marine fog is persisting just offshore of Padre Island this afternoon. The combination of light onshore surface flow, cool water temps and relatively high surface humidity levels will maintain the potential for additional coastal/marine fog later this evening. The approach and passage of another cold front from the north will finally clear out the fog as drier air moves in from the north on stronger low level winds. Will post up a Marine Dense Fog Advisory as expect the improvements in the vsbys along the lower TX coastline to be pretty short lived with vsbys degrading once again later this evening and tonight.

PREV DISCUSSION . /issued 348 PM CST Tue Jan 26 2021/

SHORT TERM (Tonight through Wednesday Night): Areas of fog continue to linger along the coast this afternoon, though this should continue to dissipate into this evening. Another cold front will move through Deep South Texas late tonight into Wednesday morning. Ahead of the front, fog will develop once again affecting much of the CWA overnight. Fog will be dense at times, mainly along and east of I69-C, and linger into the morning hours. Once the front passes, drier air will filter into the area which will aid in fog dissipation. North to northwesterly winds will increase in wake of the front leading to breezy conditions into Wednesday evening. These increased winds along with dry air will cause a concern for fire weather, with more information discussed below. Temperatures tonight ahead of the front will remain well above normal with lows in the mid 50s to lower 60s. Wednesday highs will be slightly cooler thanks to the frontal passage with highs in the low to mid 70s across the CWA and overnight temperatures falling into the low 40s in the northern Ranchlands to low 50s in the Lower Valley.

LONG TERM (Thursday through Tuesday): Broad and pretty strong 500 mb ridging will prevail over much of the central portion of the country from Thurs through Fri Night maintaining rain free conditions and temps well above climo for late Jan. On Sat another signficant 500 mb trough will dig east from the SW U.S. towards the Central and Southern Central Plains States Sat and Sun exiting quickly to the ENE. The passage of this 500 mb trough will pull another relatively dry cold front through the region late Sun. Some decent CAA is expected after this fropa dropping temps down close to climo next Mon and Tues. Overall moisture levels remain pretty limited throughout the long range period and will not include any significant pops through Days 7/8.

Both the ECMWF and the GFS show pretty good agreement in the handling of the 500 mb heights throughout the longer range period. The ECMWF temps remain a little warmer versus the GFS numbers and will lean towards the warmer ECMWF especially for high temps throughout the longer range period. Overall forecast confidence is above average today due to the solid model consistency.

MARINE (Now through Wednesday Night): Fog continues to linger over portions of the nearshore waters and Laguna Madre this afternoon. Fog should continue to lift through the remainder of the afternoon and evening with favorable conditions expected tonight. Wednesday morning marine conditions begin to deteriorate with the passage of a cold front. Northwesterly winds will greatly increase in wake of the front and thus A Gale Warning is in affect Wednesday morning into midday for the Gulf waters and a Small Craft Advisory is in effect Wednesday morning into midday for the Laguna Madre. Conditions will begin improve Wednesday afternoon and evening as winds decrease and seas begin to lower with high pressure building back into the area.

Thursday through Sunday Night: The PGF will remain pretty weak along the lower TX coastline throughout Thurs and Fri which will maintain a light to moderate onshore flow. As the SW U.S. 500 mb trough approaches the region this coming weekend, a surface low pressure system developing over the mid portion of the country will tighten up the PGF enough Sat and Sat Night to push conditions across the Bay and Gulf waters up close to SCA levels. The PGF will then weaken once again on Sun and Sun Night as the cold front gets closer to the region allowing for the winds and seas to diminish a bit. However, some lingering elevated Gulf swells may persist offshore on Sun potentially keeping conditions close to SCA levels.

FIRE WEATHER: The arrival of a cold front early Wednesday morning will bring another push of dry air and gusty winds to much of Deep South Texas. Minimum RH values are expected to range from 15 to 30 percent across all areas away from the coast, along with 20ft winds of 15-20 mph and some higher gusts expected. Elevated fire weather conditions are expected across much of the area on Wednesday, especially across areas west of U.S. Highway 77/I-69E where extreme drought conditions are occurring. Relative humidity then looks to recover across the area from Thursday onward.

PRELIMINARY POINT TEMPS/POPS. BAYVIEW/PORT ISABEL 62 71 53 69 / 10 10 0 10 BROWNSVILLE 62 74 52 72 / 10 10 0 10 HARLINGEN 59 75 50 71 / 10 10 0 10 MCALLEN 60 76 46 71 / 10 0 0 0 RIO GRANDE CITY 57 75 44 72 / 10 0 0 0 SOUTH PADRE ISLAND 63 66 59 65 / 10 10 0 10

BRO WATCHES/WARNINGS/ADVISORIES. TX . Dense Fog Advisory until 8 AM CST Wednesday for TXZ257.

GM . Dense Fog Advisory until 8 AM CST Wednesday for GMZ130-132-135- 150-155-170-175.

Small Craft Advisory from 6 AM to noon CST Wednesday for GMZ130- 132-135.

Gale Warning from 6 AM to noon CST Wednesday for GMZ150-155-170- 175.



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

Short Term/Aviation . 59-GB Long Term/Upper Air . 67-Mejia IDSS . 60-Speece


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RLIT2 13 mi480 min ENE 5.1 G 5.1 73°F 78°F1006.8 hPa (-2.6)
PMNT2 21 mi480 min 73°F 72°F1008.2 hPa (-2.6)
PTIT2 - 8779770 - Port Isabel, TX 22 mi480 min NNE 2.9 G 4.1 74°F 69°F1009.7 hPa (-2.4)
PCGT2 - 8779748 - South Padre Island CGS, TX 23 mi480 min NNW 2.9 G 4.1 70°F 72°F1007.5 hPa (-2.4)
BZST2 24 mi480 min NE 6 G 7 69°F 66°F1006.9 hPa (-2.3)
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX 38 mi480 min ESE 5.1 G 6 75°F 74°F1007.8 hPa (-2.6)

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 mi68 minSE 64.00 miFog/Mist67°F67°F100%1008.9 hPa
Port Isabel, Port Isabel-Cameron County Airport, TX12 mi67 minN 00.25 miFog67°F67°F100%1009 hPa

Link to 5 minute data for KHRL

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Tide / Current Tables for Port Isabel, Texas
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Port Isabel
Click for Map
Tue -- 05:35 AM CST     Moonset
Tue -- 07:15 AM CST     Sunrise
Tue -- 07:39 AM CST     -0.57 feet Low Tide
Tue -- 04:15 PM CST     Moonrise
Tue -- 05:53 PM CST     1.29 feet High Tide
Tue -- 06:07 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.50.30-0.2-0.4-0.5-0.6-0.5-0.3-00.30.60.91.11.21.31.31.31.21.21.11

Tide / Current Tables for Port Isabel, Texas (2)
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Port Isabel
Click for Map
Tue -- 05:35 AM CST     Moonset
Tue -- 07:15 AM CST     Sunrise
Tue -- 07:43 AM CST     -0.65 feet Low Tide
Tue -- 04:15 PM CST     Moonrise
Tue -- 06:07 PM CST     Sunset
Tue -- 06:12 PM CST     0.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.80.70.40.2-0.2-0.4-0.6-0.6-0.6-0.5-0.3-00.20.50.70.91110.90.90.90.9

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