Wednesday, March3, 2021
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Marine Weather and Tides
Jagual, 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 6:32PM Wednesday March 3, 2021 8:33 PM AST (00:33 UTC) Moonrise 11:02PMMoonset 9:57AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 404 Pm Ast Wed Mar 3 2021
Tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers through the night.
Thursday..Southeast winds 5 to 10 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers through the day.
Thursday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers through the night.
Friday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds.
Friday night..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Numerous showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Monday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 404 Pm Ast Wed Mar 3 2021
Synopsis for puerto rico and the uS. Virgin islands waters... Local winds will continue shifting and becoming southeasterly through the rest of the week. Although seas and winds are gradually subsiding, choppy conditions will continue through tonight. By tomorrow into Friday, a northerly swell will push across the local atlantic waters and passages, briefly resulting in choppy conditions once again.


7 Day Forecast for Marine Location Near Jagual, PR
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location: 18.1, -66     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 032044 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 444 PM AST Wed Mar 3 2021

SYNOPSIS. A drier air mass will continue through at least Friday over the region. A few areas of low-level clouds and light showers may move at times across the islands, but overall fair weather conditions should prevail through the workweek. Moisture increases over the region in a southeasterly wind flow by late Friday into Saturday. Drier conditions are expected on Sunday and moisture gradually increases early next week. Winds are forecast to increase once again from the east to northeast during the first part of next week.

SHORT TERM . Tonight through Friday .

A drier airmass and mid to upper level ridge continues maintaining a fair weather pattern over the local area. The TJSJ 12Z upper air sounding shows a strong trade wind cap around 850 mb with precipitable water values of less than an inch. This weather pattern is expected to prevail until at least Thursday with a few areas of low-level clouds and light showers moving at times across the islands, but no significant rainfall accumulation are expected due to the lack of mid and upper level support.

Winds will continue shifting from the southeast tonight through Friday. The wind shift is generated by the eastward movement of the Atlantic surface high pressure which is being pushed by a polar trough and cold front exiting the eastern coast of the U.S. Deeper moisture pulling due to the southeasterly wind flow will cause a rapid increase in precipitable water content. Both GFS and ECMWF models are in accordance with this event except on timing. ECMWF has the moist plume arriving earlier on Friday than GFS which has it reaching over the forecast area during the afternoon into evening hours. Additionally, a prefrontal trough northwest of Puerto Rico could affect the dynamical conditions over the local area.

Nevertheless, model guidance suggests an enhancement in moisture convergence for the end of the workweek. If this forecast materializes, environmental conditions will become favorable to support enhanced shower activity by late Friday over the islands. Light to gentle southeasterly wind flow could cause light to moderate rainfall accumulations, especially over southeastern Puerto Rico.

LONG TERM . Saturday through Wednesday .

FROM PREV DISCUSSION. /issued 403 AM AST Wed Mar 3 2021/

Polar trough and frontal boundary over the western Atlantic are expected to remain just north of the region, while an induced surface trough west of the area promotes a moist southeasterly wind flow across the region on Saturday. Therefore, expect showers to move across the USVI and east/southeast sections of PR during the early morning hours, followed by periods of possible locally heavy rainfall over the interior and northwestern PR. On Sunday, trade winds are forecast to return to around 15-20 kts and limit shower development during the afternoon hours over western PR. Across the USVI, fair weather conditions should prevail and normal to above normal temperatures are expected in general across the islands.

For early next week, another induced surface trough is forecast to develop to our northwest, and increase moisture content in general across the local area on Monday. However, models suggest today that the best areas of moisture are to remain over Hispaniola, and a broad surface high pressure will move over the western Atlantic . promoting a moderate to fresh northeast wind flow across the islands through midweek. This should favor a cool advective weather pattern, with trade wind showers moving over the USVI and east/northeast sections of PR during the night/early morning hours . followed by shallow convection developing during the afternoon hours over west/southwestern PR.

AVIATION. VFR conds expected for the next 24 hours. BKN sky at around FL060 this afternoon at TJPS and TJBQ but will improve by this evening. ESE winds up to 15 knots with sea breeze variations through 03/22Z, becoming lighter tonight. Winds will be more SE after 04/12Z up to 10kts or so, but variations will be observed after 04/15Z, at TJBQ winds may be from the NNE and TJSJ may observe winds from the East. Little SHRA activity is expected, VCSH may be possible but no major weather hazard is expected.

MARINE. Small crafts should exercise caution due to seas up to 6 feet across the northern regional waters. There is a moderate risk of rip currents for all the islands. A long period northerly swell will move briefly tomorrow and Friday. Winds will gradually turn more from the southeast tonight and become light to moderate by the end of the week.

PRELIMINARY POINT TEMPS/POPS. SJU 72 87 73 87 / 30 40 10 30 STT 74 84 74 84 / 20 20 20 50

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

SHORT TERM . WS LONG TERM . CVB PUBLIC DESK . ICP


Weather Reporting Stations
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Wind History for Yabucoa Harbor, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR23 mi38 minSE 610.00 miFair78°F67°F69%1016.4 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Wed -- 12:25 AM AST     0.51 feet High Tide
Wed -- 03:41 AM AST     0.29 feet Low Tide
Wed -- 06:40 AM AST     Sunrise
Wed -- 09:56 AM AST     Moonset
Wed -- 10:50 AM AST     0.46 feet High Tide
Wed -- 04:16 PM AST     -0.13 feet Low Tide
Wed -- 06:30 PM AST     Sunset
Wed -- 11:01 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.50.40.30.30.30.30.40.40.40.50.50.40.30.1-0.1-0.1-0.1-0.1-00.10.20.30.4

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
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Wed -- 01:57 AM AST     0.85 knots Max Flood
Wed -- 05:10 AM AST     -0.00 knots Slack
Wed -- 06:39 AM AST     Sunrise
Wed -- 08:26 AM AST     -0.86 knots Max Ebb
Wed -- 09:54 AM AST     Moonset
Wed -- 11:54 AM AST     0.00 knots Slack
Wed -- 02:35 PM AST     0.56 knots Max Flood
Wed -- 05:21 PM AST     -0.00 knots Slack
Wed -- 06:29 PM AST     Sunset
Wed -- 08:26 PM AST     -0.66 knots Max Ebb
Wed -- 11:01 PM AST     Moonrise
Wed -- 11:21 PM AST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.80.80.70.50.1-0.3-0.7-0.8-0.8-0.6-0.300.30.50.50.40.1-0.2-0.5-0.6-0.6-0.5-0.1

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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