Sunday, August9, 2020
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Marine Weather and Tides
El Negro, PR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:02AMSunset 6:54PM Sunday August 9, 2020 7:00 AM AST (11:00 UTC) Moonrise 10:58PMMoonset 10:54AM Illumination 71% 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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AMZ732 Caribbean Waters Of Puerto Rico From 10 Nm To 17n- 334 Am Ast Sun Aug 9 2020
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the day.
Tonight..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Monday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated Thunderstorms. Numerous showers.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 334 Am Ast Sun Aug 9 2020
Synopsis for puerto rico and the uS. Virgin islands waters... Marine conditions will improve today into early this week as winds and seas remain below 18 knots and 5 feet, respectively. However, seas and winds will remain between 4 and 6 feet, and between 15 and 20 knots across the caribbean waters and Mona passage today. A tropical wave is forecast to deteriorate weather and marine conditions across the local waters by Wednesday afternoon into early Friday morning.


7 Day Forecast for Marine Location Near El Negro, PR
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location: 18, -65.8     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 090802 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 402 AM AST Sun Aug 9 2020

SYNOPSIS.

The influence of a mid-to-upper level ridge and a dry air mass with African dust particles will continue to promote mostly sunny/clear and hazy skies. Maximum temperatures will remain in the low-90s with heat indices in upper 90s and mid 100s degrees Fahrenheits. Overnight and early morning showers across the local waters and windward sections followed by afternoon convection across the western portion of the islands will happen each day. The next tropical wave is forecast to arrive by the middle of this week.

SHORT TERM. Today through Tuesday .

Strong high pressure continues across the central Atlantic, which is helping to produce drier than normal conditions across the region. The effects of this ridging were evident in the sounding from yesterday evening, with a strong inversion between 850 and 700 mb, along with very dry air at mid to upper levels. Saharan dust has also invaded the region, and mild to moderate amounts will continue for the next few day. The aforementioned high pressure will also be with us for the next few days, resulting in a continuation of drier than normal conditions. Though no tropical waves are expected in the short term, patches of moisture will move in from time to time, resulting in periods of isolated to scattered showers.

Putting this all together, only isolated showers are expected for the rest of the morning, primarily across the local waters and areas near the coast of E. Puerto Rico and the USVI. For this afternoon, east-northeasterly winds will favor showers over southwestern Puerto Rico this afternoon. These showers will likely not be impactful, though persistent showers may produce ponding of water in isolated areas. Monday and Tuesday are essentially a repeat of today, except the shower activity in the afternoon will center over western rather than southwestern Puerto Rico. Again these showers will likely not be very impactful.

LONG TERM. Wednesday through Monday

The mid level high pressure is forecast to remain near the region as one of the dominant weather features promoting dry air at mid level, and a persistent trade wind cap. However, a weak tropical wave is forecast to move across the islands by Wednesday afternoon and should be out of the region by Thursday morning when a dry air mass with African dust will filter from the east over the islands. This tropical system will provide the best chance for shower and thunderstorm development across the islands, but doesn't look so impressive at this time.

For the next weekend, a more robust tropical wave will provide a better chance for inclement weather across the islands, now, by Saturday afternoon into Sunday. Uncertainty still high because this tropical system is too far in the long-term forecast, therefore it's too early to know its true nature and impacts across the islands.

Generally speaking, you can expect a seasonal weather pattern with overnight and early morning showers moving across the local waters and windward sections, followed by afternoon convection over the western sections of the islands each day. Maximum temperatures will continue in the low 90s mainly over the urban and coastal areas with heat indices from the upper 90s to mid 100s degrees Fahrenheits.

AVIATION.

Primarily VFR conds expected at all terminals. Brief passing showers possible for all terminals except TJPS/TJMZ/TJBQ through 16z with E winds at 5 to 10 kts. Winds pick up to 10 to 15 kts with sea breeze variations, and VCSH possible for TJMZ in the afternoon.

MARINE.

Mariners can expect tranquil marine conditions through much of the forecast period. However, winds and seas will remain between 15 and 20 knots, and between 4 and 6 feet across the Caribbean Offshore waters and the Mona Passage today. Also, local effects could increase winds between 15 and 20 knots each day, especially during the afternoon hours. Marine/weather conditions will deteriorate due to a tropical wave between Wednesday afternoon and early Friday morning.

PRELIMINARY POINT TEMPS/POPS. SJU 90 81 90 79 / 10 20 20 30 STT 91 81 91 79 / 20 30 30 30

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

SHORT TERM . mb LONG TERM . CAM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ESPP4 - 9752695 - Esperanza, PR 19 mi48 min NNE 1 G 1.9 84°F1018.3 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 23 mi75 min NE 1 79°F 1019 hPa69°F
41056 25 mi60 min E 12 G 16 83°F 84°F3 ft1016.9 hPa (+0.0)
CLBP4 - 9752235 - Culebra, PR 34 mi42 min 82°F 85°F1017.8 hPa
41053 - San Juan, PR 36 mi120 min E 12 G 16 84°F 84°F3 ft1016.9 hPa (+0.0)
SJNP4 - 9755371 - San Juan, PR 36 mi42 min E 8.9 G 9.9 83°F 85°F1018.6 hPa
42085 - Southeast of Ponce, PR 40 mi120 min NE 12 G 12 84°F 85°F3 ft1016.3 hPa (-0.5)

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, PR32 mi64 minESE 310.00 miA Few Clouds82°F75°F79%1018.1 hPa

Link to 5 minute data for TJSJ

Wind History from JSJ (wind in knots)
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2 days ago3E5E10E7NE15NE16NE16NE19NE18
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Tide / Current Tables for Puerto Maunabo, Puerto Rico
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Puerto Maunabo
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Sun -- 12:19 AM AST     0.58 feet High Tide
Sun -- 04:58 AM AST     0.28 feet Low Tide
Sun -- 06:04 AM AST     Sunrise
Sun -- 10:54 AM AST     Moonset
Sun -- 01:40 PM AST     0.50 feet High Tide
Sun -- 03:59 PM AST     0.42 feet Low Tide
Sun -- 06:53 PM AST     Sunset
Sun -- 10:58 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.50.40.30.30.30.30.30.40.40.40.50.50.50.50.40.40.40.50.50.50.50.6

Tide / Current Tables for Vieques Passage, Puerto Rico Current
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Vieques Passage
Click for Map
Sun -- 12:05 AM AST     0.00 knots Slack
Sun -- 02:45 AM AST     0.40 knots Max Flood
Sun -- 05:23 AM AST     -0.00 knots Slack
Sun -- 06:03 AM AST     Sunrise
Sun -- 08:48 AM AST     -0.63 knots Max Ebb
Sun -- 10:53 AM AST     Moonset
Sun -- 12:00 PM AST     0.00 knots Slack
Sun -- 03:17 PM AST     0.66 knots Max Flood
Sun -- 06:38 PM AST     -0.00 knots Slack
Sun -- 06:52 PM AST     Sunset
Sun -- 09:43 PM AST     -0.56 knots Max Ebb
Sun -- 10:56 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-00.20.40.40.30.1-0.2-0.4-0.6-0.6-0.5-0.3-00.30.50.70.60.50.2-0.1-0.4-0.5-0.6-0.5

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (7,2,3,4)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.