Wednesday, January17, 2018

Marine Weather and Tides
Puerto Real, PR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:02AMSunset 6:15PM Wednesday January 17, 2018 9:35 PM AST (01:35 UTC) Moonrise 7:21AMMoonset 6:52PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 852 Pm Ast Wed Jan 17 2018
Rest of tonight..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 9 seconds.
Thursday..East winds 5 to 10 knots veering southeast in the afternoon. Seas 1 to 3 feet. Dominant period 10 seconds. Isolated showers.
Thursday night..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 9 seconds. Isolated showers.
Friday..East winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Scattered showers.
Friday night..Northeast winds 5 to 10 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. North swell around 4 feet. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Northwest swell around 4 feet. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 8 seconds. Scattered showers.
AMZ700 852 Pm Ast Wed Jan 17 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure in the north central atlantic will continue to weaken through the end of the week. A frontal boundary will linger to the west of this high pressure while an induced surface trough continue to weaken north of the region through Friday. Another high pressure ridge will move into the west and central atlantic over the weekend. This will maintain a moderate to locally fresh trade winds across the regional waters.

7 Day Forecast for Marine Location Near Puerto Real, PR
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location: 18.08, -67.18     debug

Area Discussion for - San Juan, PR
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Fxca62 tjsj 180108
area forecast discussion
national weather service san juan pr
908 pm ast Wed jan 17 2018

Partly cloudy skies will persist through the overnight hours with
periods of mostly light passing showers expected across the coastal
waters and portions of the north and east coastal sections of some
of the islands. The light to moderate easterly trade winds will
continue across the region through Friday with breezy conditions
expected by the upcoming weekend as high pressure ridge is forecast
to build north of the region and increase the local pressure gradient.

No changes made to the inherited forecast package at this as the overall
weather pattern is not expected to significantly change during the
next several days.

Aviation update Vfr conds durg entire prd with no sig avn wx
impacts attm. No chg to previous avn fcst.

Marine update No change to previous marine forecast winds and
seas 10-15 kts and 5-7 feet respectively. A northerly swell is
still forecast to arrive across the regional waters late Friday
and into the weekend. This along with the increasing e-ne trade
winds will generate and maintain hazardous seas.

Prev discussion issued 502 pm ast Wed jan 17 2018

a mid to upper level ridge continue as the dominant weather feature.

A surface high pressure across the atlantic ocean is inducing a
moderate trade wind flow which is pushing patches of low level
moisture from time to time. Under this pattern expect passing
showers across the u.S. Virgin islands, east and north puerto rico
each day, as well as afternoon convection across west puerto rico.

A similar pattern will prevail through the end of the work-week.

Short term...

shower activity was noted across the west interior and western
puerto rico. Between a quarter of an inch to almost one inch of
rainfall fall across those areas. On the other hand the eastern
coastal sections observed quick passing showers, which developed
downwind from the u.S. Virgin islands into culebra and eastern
puerto rico.

Later tonight a patch of dry air will limit shower activity to
the north and eastern sections of puerto rico and downwind from
the u.S. Virgin islands. Elsewhere mostly clear skies with no
shower activity is expected. By Thursday morning a patch of
moisture will increase the amount of showers across the eastern
half portion of puerto rico and the u.S. Virgin islands. Showers
are then expected across the western portion of puerto rico during
the afternoon hours. The trade wind inversion is forecast to
prevail through the end of the work-week limiting any vertical
development across the islands. Therefore no lightning activity is

Long term...

Saturday through Thursday... Upper level ridge will
build north of the area. As a result, dry and pleasant weather
conditions are expected Saturday and Sunday. For Monday next
week,forecast models indicated high pressure weaken and winds
shift southeasterly. Moisture is then forecast to increase at the
beginning of next week. No significant weather events are
forecast to affect the local region in the log term.


vfr conds expected across the local terminals through the
forecast period. Vcsh expected for the local terminals with a
probability of tempo MVFR conds at tjmz between 17 18z and 17 21z,
but most of the activity is expected south of tjmz. Winds from
the east at around 10kt with sea breeze variations for the rest of
today, decreasing winds overnight.


marine conditions are expected to slowly improve overnight. For
that reason small craft advisories continues for many of the
local waters due to seas up to 7 feet. Model guidance are
suggesting the arrival of a northerly swell by the upcoming
weekend, which could increase the seas above 7 feet especially
across the atlantic waters and caribbean passages.

For the beach goers... High risk of rip currents still in effect
along the northern coastline of puerto rico and saint croix.

Preliminary point temps pops
Sju 73 84 75 84 40 20 10 20
stt 74 84 74 84 50 20 10 10

Sju watches warnings advisories
Pr... High rip current risk until 6 am ast Thursday for north central-
northeast-northwest-san juan and vicinity-southeast-western

Vi... High rip current risk until 6 am ast Thursday for st croix.

Am... Small craft advisory until 2 am ast Thursday 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... Ram
long term... .Ram

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AROP4 - 9757809 - Arecibo, PR 37 mi65 min E 5.1 G 7
42085 - Southeast of Ponce, PR 38 mi95 min ENE 14 G 18 81°F 81°F1014.9 hPa (+1.0)
MISP4 - 9759938 - Mona Island, PR 40 mi47 min 77°F 81°F1016.6 hPa

Wind History for Mayaguez, PR
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JMZ (wind in knots)
Last 24hr----------------------------------------E6E5E8E9
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Puerto Real, Puerto Rico
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Puerto Real
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Wed -- 02:04 AM AST     -0.15 feet Low Tide
Wed -- 07:03 AM AST     Sunrise
Wed -- 07:20 AM AST     Moonrise
Wed -- 09:16 AM AST     1.08 feet High Tide
Wed -- 03:55 PM AST     0.27 feet Low Tide
Wed -- 06:14 PM AST     Sunset
Wed -- 06:52 PM AST     Moonset
Wed -- 08:24 PM AST     0.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Magueyes Island, Caribbean Sea, Puerto Rico
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Magueyes Island
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Wed -- 12:41 AM AST     -0.23 feet Low Tide
Wed -- 07:02 AM AST     Sunrise
Wed -- 07:19 AM AST     Moonrise
Wed -- 10:51 AM AST     0.56 feet High Tide
Wed -- 06:14 PM AST     Sunset
Wed -- 06:52 PM AST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Puerto Rico    EDIT

Wind Forecast for (20,4,5,8)
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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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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 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 numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at 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.