Tuesday, January26, 2021
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Marine Weather and Tides
Cataño, PR

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 6:57AMSunset 6:16PM Tuesday January 26, 2021 6:25 PM AST (22:25 UTC) Moonrise 4:23PMMoonset 5:09AM 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 413 Pm Ast Tue Jan 26 2021
.small craft advisory in effect through Wednesday evening...
Tonight..East winds 10 to 15 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 11 seconds. North swell 4 to 7 feet. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. North swell 5 to 7 feet. Isolated showers.
Wednesday night..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 11 seconds. North swell 4 to 6 feet. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. North swell 4 to 5 feet. Isolated showers.
Thursday night..Northeast winds 5 to 10 knots backing northwest after midnight. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Isolated showers.
Friday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 13 seconds. North swell 4 to 8 feet. Scattered showers.
Saturday..Northeast winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 13 seconds. North swell 6 to 8 feet. Scattered showers.
Sunday..East winds 15 to 20 knots. Seas 6 to 8 feet with occasional seas up to 10 feet. Dominant period 13 seconds. North swell 7 to 8 feet. Scattered showers.
AMZ700 413 Pm Ast Tue Jan 26 2021
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the southwestern atlantic will result in moderate to fresh trade winds through Wednesday. A northerly swell will continue to affect the atlantic waters and local passages through Wednesday night, resulting in hazardous seas. More tranquil seas are expected Thursday and Friday. A more vigorous northerly swell is forecast to affect the area by the upcoming weekend.


7 Day Forecast for Marine Location Near Cata�o, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 262225 CCA AFDSJU

Area Forecast Discussion . CORRECTED National Weather Service San Juan PR 625 PM AST Tue Jan 26 2021

SYNOPSIS. Surface high pressure north of the area will result in a brisk east to east-northeast flow through Wednesday. The remnants of a frontal boundary currently over the area is expected to move southward, into the Caribbean waters by tonight, with a drier than normal air mass expected to move in later tonight and mostly prevailing through the end of the work week, limiting shower activity. A stronger frontal boundary is expected to move over the area during the weekend, increasing shower activity. A northerly swell currently affecting the Atlantic waters and local passages will continue to result in hazardous seas through Wednesday.

SHORT TERM. Tonight through Thursday .

Not much change is expected aloft as a mid-level ridge continues centered over the western and central Caribbean, with its axis extending into the area. As a result, very dry and stable conditions continue aloft. Meanwhile, at lower-levels, a surface high pressure is situated just north of the region. This is producing a brisk east to east-northeast flow, which is expected to prevail through Wednesday. Meanwhile, the remnants of a frontal boundary are moving over the area. This has lead to isolated to scattered shower activity. The surface high pressure will push the remnants of the frontal boundary south of the area tonight with a much drier air mass expected to move in later tonight through Wednesday morning. In fact, precipitable water values drop to between 0.7 and 0.9 inches, which is near two standard deviations below normal for this time of the year. Therefore, mainly dry weather conditions can be expected. On Wednesday afternoon into Wednesday evening, as the winds become more easterly, some of the low-level moisture associated the remnants of the frontal boundary will retreat back into the USVI and eastern Puerto Rico. This may be sufficient to result in some showers across these areas. However, these showers should be brief with only very minor accumulations expected.

By Thursday, low-level winds are expected to become more east- southeast to southeast as a vigorous surface low pressure and the associated front moves into the western Atlantic. In addition, the surface low pressure and the associated front will weaken significantly the pressure gradient and thus will result in light winds. A drier than normal air mass will also prevail, with precipitable water values expected to range between 0.8 and 1.0 inches. Therefore, fair weather conditions with little to no shower activity are expected.

LONG TERM. Friday through Tuesday .

PREV DISCUSSION. /issued 543 AM AST Tue Jan 26 2021/

A surface-high pressure located over the central Atlantic will dominate the local weather under a drier mass filtering across the region on Friday. As the drier air mass moves over the area, precipitable water values will remain below normal, resulting in less shower activity over the local islands. As the broad surface high pressure moves eastward, this will push the remnants of a frontal boundary over the forecast area. This low level moisture in combination with tropical moisture embedded in northeasterly winds will result in a wetter weather pattern for the weekend. According to model guidance, precipitable water values will range above normal values. That said, isolated to scattered showers could affect Puerto Rico and the U.S. Virgin Islands windward sections in the morning and evening hours. In the afternoon hours, the shower activity will focus on the interior and southwestern portions. If the model guidance is correct, the upcoming weekend will have a moderate flood potential, mainly over the interior portions of Puerto Rico.

As the ridge moves eastward over the central Atlantic late on Monday, a southeasterly component is expected. Therefore, expect an improvement in weather conditions as the low-level moisture exits the area due to the wind change. However, on Tuesday, some patches of tropical moisture will reach the local islands and, combined with the local effects, could result in afternoon showers. This change in the wind direction will also result in warmer temperatures, mostly over the coastal sections of Puerto Rico and the USVI.

AVIATION. Mainly VFR conds at this time, but better clouds upstream from TNCM and TKPK could bring periods of MVFR CIGs and -SHRA til 27/04Z. Some topping of hir mtns in PR till 27/03Z. Sfc winds ENE 10-15 kt with gusts to 18 kt except to 22 kt arnd TIST and TJBQ. Winds on Wednesday slightly less. Winds 6-12 kt btwn 26/22Z and 27/14Z. Maximum winds W-WNW 50-60 kt btwn FL 370-440.

MARINE. A northerly swell is currently affecting the Atlantic waters and local passages. This is resulting in hazardous seas of between 6 and 8 feet. These hazardous seas are expected to continue through Wednesday night. As a result, Small Craft Advisories are in effect. There is a high risk of rip currents for the north-facing beaches of PR, Culebra and St. Thomas. In addition, due to breaking waves as high as between 8 and 11 feet, a High Surf Advisory has also been issued for the north-facing beaches of PR and Culebra through Wednesday morning. More tranquil seas are expected Thursday into most of Friday. A more vigorous northerly swell is still expected to impact the area beginning late Friday night and lasting through the entire weekend into early next week, with very hazardous seas and coastal conditions likely. Stay tuned during the next few days as details become clearer on the different hazards expected.

PRELIMINARY POINT TEMPS/POPS. SJU 73 84 74 86 / 20 20 20 20 STT 72 84 73 83 / 20 20 10 20

SJU WATCHES/WARNINGS/ADVISORIES. PR . High Rip Current Risk through Thursday afternoon for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity.

High Surf Advisory until 10 AM AST Wednesday for Culebra- Mayaguez and Vicinity-North Central-Northeast-Northwest-San Juan and Vicinity.

VI . High Rip Current Risk through Thursday afternoon for St Thomas. St John. and Adjacent Islands.

AM . Small Craft Advisory until 8 PM AST Wednesday for Coastal Waters of Northern Puerto Rico out 10 NM-Coastal Waters of Northern USVI and Culebra out 10 NM-Mona Passage Southward to 17N.

Small Craft Advisory until 2 AM AST Thursday for Anegada Passage Southward to 17N-Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.

Small Craft Advisory until 2 PM AST Wednesday for Coastal Waters of Northwestern Puerto Rico out 10 NM.



SHORT TERM . CAM LONG TERM . GL PUBLIC DESK . FRG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi146 min ENE 12 G 15 81°F 81°F1017 hPa (-1.2)
41053 - San Juan, PR 1 mi146 min E 16 G 19 80°F 81°F6 ft1015.7 hPa (-1.3)
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi161 min ENE 2.9 80°F 1018 hPa69°F
41056 37 mi146 min ENE 16 G 19 79°F 80°F5 ft
ESPP4 - 9752695 - Esperanza, PR 43 mi146 min ESE 9.9 G 16 81°F1016.9 hPa (-1.1)
CLBP4 - 9752235 - Culebra, PR 45 mi146 min 81°F 81°F1016.6 hPa (-1.1)
42085 - Southeast of Ponce, PR 46 mi146 min E 18 G 21 80°F 81°F4 ft1015 hPa (-1.6)

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR7 mi30 minE 1110.00 miPartly Cloudy78°F69°F74%1017.3 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Last 24hrE9NE7E7E10E6--S3CalmCalmCalmS3CalmCalmE7E5E14E15E19
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1 day agoNE10NE9NE8NE11NE9NE8
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2 days agoE9E7SE3CalmCalmCalmCalmCalmS3CalmCalmCalmCalmCalmE4E9E11E10E10NE11NE10NE12NE10NE8

Tide / Current Tables for San Juan, Puerto Rico (3)
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San Juan
Click for Map
Tue -- 12:18 AM AST     -0.34 feet Low Tide
Tue -- 05:08 AM AST     Moonset
Tue -- 06:59 AM AST     Sunrise
Tue -- 07:59 AM AST     1.49 feet High Tide
Tue -- 02:48 PM AST     0.37 feet Low Tide
Tue -- 04:23 PM AST     Moonrise
Tue -- 06:15 PM AST     Sunset
Tue -- 06:35 PM AST     0.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.3-0.10.10.50.91.21.41.51.41.210.70.50.40.40.40.50.60.60.50.30.1-0.1

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Tue -- 12:53 AM AST     -0.08 feet Low Tide
Tue -- 05:08 AM AST     Moonset
Tue -- 06:58 AM AST     Sunrise
Tue -- 08:33 AM AST     1.52 feet High Tide
Tue -- 03:22 PM AST     0.53 feet Low Tide
Tue -- 04:22 PM AST     Moonrise
Tue -- 06:14 PM AST     Sunset
Tue -- 07:12 PM AST     0.72 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.1-00.20.50.81.11.41.51.51.41.210.80.60.50.50.60.70.70.70.60.40.2

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