Sunday, March7, 2021
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Marine Weather and Tides
Guánica, 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 6:40AMSunset 6:36PM Sunday March 7, 2021 4:22 PM AST (20:22 UTC) Moonrise 2:12AMMoonset 1:27PM Illumination 33% Phase: Waning Crescent; Moon at 24 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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AMZ745 Coastal Waters Of Southwestern Puerto Rico Out 10 Nm- 347 Pm Ast Sun Mar 7 2021
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds.
Monday..Southeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds.
Monday night..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Tuesday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds.
Tuesday night..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Wednesday..East winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Isolated showers.
Thursday..East winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Isolated showers.
Friday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 347 Pm Ast Sun Mar 7 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Light to moderate east to southeast winds will prevail through Monday, with choppy seas across the offshore atlantic waters and passages. A northerly swell will invade and spread across the atlantic waters by Tuesday resulting in choppy and hazardous seas, winds are also forecast to increase and become more northeasterly.


7 Day Forecast for Marine Location Near Gu�nica, PR
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location: 17.97, -66.92     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 071550 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 1150 AM AST Sun Mar 7 2021

UPDATE. Mostly sunny to partly cloudy skies prevailed across the region with so far only a few light showers noted over the coastal waters. Expected fair weather conditions to continue across most areas except for a few showers which may be possible over parts of the west interior sections of Puerto Rico later this afternoon. Otherwise no changes to the inherited short term forecast package and reasoning. Recent TJSJ upper air sounding was fairly dry with strong cap inversion and overall dry conditions and subsidence in place aloft. Low level winds have become a bit more southeast to east below 700 millibars, so slightly warmer high temperatures still expected for today in some areas along the north coast of PR. Winds are to become more east to northeast by early next week.

AVIATION UPDATE. No chg to previous AVN discussion. VFR durg prd at all terminals and en route btw islands. SCT lyrs nr FL025 . FL060. Mstly Isold SHRA en route btw islands and ovr regional waters. SFC wnds generally fm ESE at 5-15 kts with some sea breeze variations. No sig operational wx impacts attm.

MARINE UPDATE. No sig changes to the previous marine discussion at this time. Seas across the offshore Atlantic will be between 5 to 6 feet and 5 feet or less elsewhere for the rest of today. Small craft operators should exercise caution over the offshore Atlantic waters due to a slight chop.

PREV DISCUSSION. /issued 423 AM AST Sun Mar 7 2021/

SYNOPSIS .

Expect another fair weather day, but with above-normal temperatures due to an east-southeast wind flow. A transition to an unstable weather pattern is forecast for the second part of next week with the proximity of a mid to upper-level trough. A northerly swell will deteriorate marine conditions Tuesday and onward.

SHORT TERM . Today through Tuesday .

The combination of a surface high pressure located across the central Atlantic and a frontal boundary stalled well northwest of the region will continue to result in an east-southeast flow for today. Therefore, above normal temperatures are expected once again across coastal locations with highs in the upper 80s to near 90 degrees. Another fair weather day is also expected, similar to yesterday, as a trade wind cap will once again limit shower activity. However, isolated to widely scattered showers cannot be ruled out across portions of northwestern Puerto Rico this afternoon due to local and diurnal effects.

On Monday, an induced surface trough will develop just east of the area. This feature will cause the low-level winds to switch to the east-northeast. Some patches of low-level moisture will also move across to result in isolated to widely scattered brief showers across portions of eastern Puerto Rico and the USVI during the morning hours with shallow afternoon convection across southwestern Puerto Rico. Rainfall accumulations for the most part will be light.

By Tuesday, the low-level winds are expected to increase to near 20 knots from the east-northeast as the local pressure gradient tightens in response to a surface high pressure moving across the western Atlantic. This will result in a cool advective pattern across the region with trade wind shower activity expected, with the highest concentration across the local waters as well as across portions of eastern Puerto Rico and the USVI. Western Puerto Rico may observe some activity during the afternoon hours. Given the fast moving nature of these showers, rainfall accumulations will remain limited.

LONG TERM . Wednesday through Sunday .

An old cold front will linger north of the islands, promoting moisture pooling over the region on Wednesday. The frontal boundary will linger off to the north until it dissipated or lifted away from the northeast Caribbean. Behind the front, a surface high-pressure will move eastward across the western Atlantic and will build across the central Atlantic throughout the week. This high-pressure will increase local winds Wednesday and Thursday, diminishing Friday into the weekend.

On the other hand, an amplifying mid to upper-level trough over Cuba/Jamaica will approach PR/USVI weakening the ridge aloft. It will cross the western Caribbean until its axis re-locate near the Hispaniola by the second part of the week. They are some discrepancy between the solutions of GFS and ECMWF. However, they are consistently indicating an unstable weather pattern Thursday through Sunday.

AVIATION .

VFR conditions to prevail throughout the period. Iso-Sct SHRA may affect NW PR between 07/17z and 07/22z, however, no impacts to area terminals expected at this time. Light and variable winds through 07/12z, increasing to 10 to 15 knots from the E-ESE after 07/14z with sea breeze variations.

MARINE .

Tranquil to slightly choppy seas will prevail through early this week. Mariners can expect seas up to 5 feet and winds around 15 knots. However, they should exercise caution across the Atlantic Offshore waters and Anegada Passage due to seas up to 6 feet and winds between 15 and 20 knots, respectively. Seas will become hazardous across the Atlantic Waters and Caribbean Passages as a northerly swell reach the local area. These conditions should last through most of the work-week.

Beachgoers, a moderate risk of rip currents will continue for most north and east-facing beaches in Puerto Rico and the U.S. Virgins Islands through at least Monday. Then, the risk will become high with the arrival of the northerly swell Tuesday and onward. Please remain vigilant of the surf zone conditions to avoid a tragic event.

PRELIMINARY POINT TEMPS/POPS. SJU 89 75 86 74 / 10 20 20 30 STT 86 74 85 72 / 20 40 40 20

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . None.

SHORT TERM . RAM LONG TERM . mb PUBLIC DESK . 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 7 mi52 min SSE 8.9 G 14 83°F 80°F1015.6 hPa
MGZP4 - 9759394 - Mayaguez, PR 21 mi52 min 85°F 81°F1015.2 hPa
42085 - Southeast of Ponce, PR 22 mi82 min E 12 G 14 80°F 80°F4 ft1015 hPa (-1.9)
PTRP4 33 mi27 min N 6 G 9.9 84°F
41115 - Rincon, Puerto Rico (181) 34 mi56 min 81°F2 ft
JOXP4 - Jobos Bay Reserve, Puerto Rico 37 mi97 min E 8 84°F 1017 hPa71°F

Wind History for Magueyes Island, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for TJPS

Wind History from JPS (wind in knots)
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Last 24hr--------------------------------------E5NE5NE5--Calm
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2 days ago------------------------------------------------

Tide / Current Tables for Guanica, Puerto Rico
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Guánica
Click for Map
Sun -- 02:11 AM AST     Moonrise
Sun -- 06:41 AM AST     Sunrise
Sun -- 06:56 AM AST     0.66 feet High Tide
Sun -- 01:27 PM AST     Moonset
Sun -- 06:35 PM AST     Sunset
Sun -- 08:11 PM AST     -0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
Click for Map
Sun -- 02:12 AM AST     Moonrise
Sun -- 06:42 AM AST     Sunrise
Sun -- 07:04 AM AST     0.56 feet High Tide
Sun -- 01:27 PM AST     Moonset
Sun -- 06:36 PM AST     Sunset
Sun -- 06:47 PM AST     -0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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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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