Thursday, January23, 2020
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Marine Weather and Tides
Isabela, 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 7:02AMSunset 6:18PM Thursday January 23, 2020 1:32 PM AST (17:32 UTC) Moonrise 6:01AMMoonset 5:18PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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AMZ742 Coastal Waters Of Northwestern Puerto Rico Out 10 Nm- 1002 Am Ast Thu Jan 23 2020
Rest of today..West winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers through the day. Isolated Thunderstorms in the afternoon.
Tonight..North winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Scattered showers.
Friday..Northeast winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. North swell 4 to 5 feet. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 12 seconds. North swell 4 to 7 feet. Scattered showers.
Saturday..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. North swell 4 to 7 feet. Scattered showers.
Sunday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. North swell 4 to 7 feet. Scattered showers.
Monday..South winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. North swell around 4 feet. Scattered showers.
AMZ700 1002 Am Ast Thu Jan 23 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A surface low pressure to our north will maintain a moderate southerly wind flow across the region into the afternoon hours today. Winds will become gentle to moderate and variable on Friday as a frontal boundary moves in. Tranquil marine conditions will persist today into Friday, but another northerly swell is expected to cause hazardous seas from Friday morning and into Sunday. The threat for showers will increase heading towards the weekend as the aforementioned front moves into the region.


7 Day Forecast for Marine Location Near Isabela zona urbana, PR
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location: 18.5, -67.01     debug


Area Discussion for - San Juan, PR
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FXCA62 TJSJ 231425 AAA AFDSJU

Area Forecast Discussion . UPDATED National Weather Service San Juan PR 1025 AM AST Thu Jan 23 2020

UPDATE. Showers embedded in the moderate south wind flow have affected portions of southern and southeastern PR during the early morning hours. An increase in shower activity is expected in the afternoon hours as moisture and instability associated with the frontal boundary combine with diurnal and local effects. With the moderate instability aloft, isolated thunderstorms are still forecast for the northern half portion of PR. Rainfall accumulations are expected to be enough to generate minor flooding across urban and poor drainage areas. Shower and thunderstorm activity will begin to cease during the evening hours, leaving partially to mostly cloudy skies across the region.

AVIATION. VFR conds are expected drg prd. As the frontal boundary approaches the area, SHRA is expected across PR and USVI. SHRA is expected for TJBQ/TJSJ in the afternoon hours. VCTS with BKN lys are also expect for the aforementioned terminals. For the rest of the terminals, VCSH are possible until evening hours.

MARINE. Isolated to scattered showers are affecting the local waters. San Juan 41053 buoy is reporting seas up to 3 feet and 41053 bouy is now observing seas up to 6 feet. As the frontal boundary approaches the area, choppy seas could be expected today across the regional waters. A high risk of rip currents could be issue today for the northern coasts of PR, Vieques, Culebra and St. Thomas due to the approaching northerly swell.

PREV DISCUSSION. /issued 1010 AM AST Thu Jan 23 2020/

UPDATE . Showers embedded in the moderate south wind flow have affected portions of southern and southeastern PR during the early morning hours. An increase in shower activity is expected in the afternoon hours as moisture and instability associated with the frontal boundary combine with diurnal and local effects. With the moderate instability aloft, isolated thunderstorms are still forecast for the northern half portion of PR. Rainfall accumulations are expected to be enough to generate minor flooding across urban and poor drainage areas. Shower and thunderstorm activity will begin to cease during the evening hours, leaving partially to mostly cloudy skies across the region.

AVIATION . VFR conds are expected drg prd. As the frontal boundary approaches the area, SHRA is expected across PR and USVI. SHRA is expected for TJBQ/TJSJ in the afternoon hours. VCTS with BKN lys are also expect for the aforementioned terminals. For the rest of the terminals, VCSH are possible until evening hours.

MARINE . Isolated to scattered showers are affecting the local waters. San Juan 41053 buoy is reporting seas up to 3 feet and 41053 bouy is now observing seas up to 6 feet. As the frontal boundary approaches the area, choppy seas could be expected today across the regional waters. A high risk of rip currents could be issue today for the northern coasts of PR, Vieques, Culebra and St. Thomas due to the approaching northerly swell.

PRELIMINARY POINT TEMPS/POPS. SJU 84 73 82 73 / 80 60 60 60 STT 84 73 83 71 / 30 50 50 50

SJU WATCHES/WARNINGS/ADVISORIES. PR . VI . None. AM . Small Craft Advisory from 8 AM Friday to 8 PM AST Saturday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N- Coastal Waters of Northern Puerto Rico out 10 NM.



SHORT TERM . FRG LONG TERM . DS PUBLIC DESK . ICP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AROP4 - 9757809 - Arecibo, PR 16 mi62 min WNW 18 G 20
PTRP4 16 mi22 min NNW 5.1 G 9.9 75°F
41115 - Rincon, Puerto Rico (181) 17 mi32 min 81°F3 ft
MGZP4 - 9759394 - Mayaguez, PR 21 mi50 min 82°F1013.4 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 37 mi50 min 80°F 80°F1013 hPa
SJNP4 - 9755371 - San Juan, PR 47 mi44 min 82°F 81°F1012 hPa
41053 - San Juan, PR 48 mi32 min NW 16 G 23 81°F 81°F3 ft1010.8 hPa (-1.0)

Wind History for Arecibo, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Aquadilla, Rafael Hernandez Airport, PR6 mi42 minNNW 87.00 miOvercast75°F0°F%1013.2 hPa

Link to 5 minute data for TJBQ

Wind History from JBQ (wind in knots)
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Last 24hrN4S3S6SW5S6SW5S3S3S3SW4SW4SW4----------SW4SW5SW7SW9NW11
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1 day agoN7NE4N6N4NE3NE3CalmCalm--------------SE4SE4SE4S3S3CalmS4S6SW9
G14
2 days agoE12E12E8E5E6E7CalmS7------------------SE3S3CalmCalmCalmN5N5

Tide / Current Tables for Aguadilla, Crashboat Beach, Puerto Rico
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Mayaguez, Puerto Rico
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Mayaguez
Click for Map
Thu -- 12:46 AM AST     -0.38 feet Low Tide
Thu -- 06:00 AM AST     Moonrise
Thu -- 07:03 AM AST     Sunrise
Thu -- 08:03 AM AST     1.58 feet High Tide
Thu -- 02:47 PM AST     0.34 feet Low Tide
Thu -- 05:19 PM AST     Moonset
Thu -- 06:17 PM AST     Sunset
Thu -- 07:04 PM AST     0.73 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.4-0.200.40.81.21.51.61.51.310.80.50.40.30.40.50.70.70.70.50.30

Weather Map
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wmap_A
GEOS Local Image of Puerto Rico    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (12,3,4,5)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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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.