Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Naranjito, 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 6:48AMSunset 5:52PM Saturday December 16, 2017 12:33 PM AST (16:33 UTC) Moonrise 5:19AMMoonset 4:53PM Illumination 3% 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 1037 Am Ast Sat Dec 16 2017
.small craft should exercise caution...
Rest of today..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers through the day.
Tonight..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.
Sunday..Northeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Sunday night..Northeast winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 7 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 8 seconds. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. North swell 4 to 5 feet. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Scattered showers.
AMZ700 1037 Am Ast Sat Dec 16 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure ridge will build and spread across the forecast area, tightening the local pressure gradient. This will result in a moderate to fresh east to northeast wind flow through the weekend. A northerly swell will subside across the offshore atlantic the rest of this morning, however hazardous seas will return across the caribbean passages and offshore waters later tonight.

7 Day Forecast for Marine Location Near Naranjito, PR
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location: 18.31, -66.18     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 161536
afdsju
area forecast discussion
national weather service san juan pr
1136 am ast Sat dec 16 2017

Update Quick passing trade wind clouds and periods of light to
moderate showers affected parts of the islands and coastal waters
during the morning hours. By late morning and during the rest of
the day, expect a gradual improvement with partly cloudy to mostly
sunny skies and limited shower activity as indicated in the previous
forecast discussion. No change to inherited forecast package at this
time, model guidance and present weather pattern continued to suggest
mostly fair weather skies, and prevailing moderate to occasionally
strong east to northeast winds, typical for this time of the year.

Aviation update Sct-bkn cld lyrs fl025... Fl050... Few shra en
route btw islands and ovr coastal waters...VFR at all local
terminals. No sig wx impacts or chng to previous avn discussion.

Marine update Seas and a northerly swell will diminish through
the rest of the morning hours, however rough and hazardous seas
are expected to return across the offshore waters and local passages
later tonight due to fresh to locally strong trade winds. Please
refer to the latest coastal waters forecast and marine weather
message issued by WFO san juan pr.

Prev discussion issued 529 am ast Sat dec 16 2017
synopsis...

under a ridge pattern aloft, another fair weather day is expected
across the islands. A surface high pressure across the central
atlantic will tighten the local pressure gradient increasing the
northeasterly wind flow through the weekend.

Short term... Tonight through Monday...

a persistent mid to upper level ridge will suppress wide spread
convection across puerto rico and the u.S. Virgin islands through
the beginning of next week. San juan skew-t soundings shows drier
air from 800 mb to 200 mb this is also a reason why showers will
be limited across the region through Wednesday. Similar to the
previous days fair weather conditions will remain across the
forecast area with the possibility for a occasional shower during
the afternoon. Otherwise mostly sunny skies with daytime high
temperatures reaching the low to mid 80s with an easterly wind of
10 to 15 mph with higher gusts possible.

Long term... Tuesday through Saturday...

the ridge pattern aloft will hold across the islands through the
upcoming mid-week. Therefore, expect mostly mostly clear skies
with a few passing showers from time to time each day. The ridge
pattern is forecast to slowly erodes during the latter part of
next week, as a polar trough amplified from the northeast into the
northeastern caribbean. There is enough uncertainty about the
final solutions at this time. However, if weather guidance are in
the right track, this will result in a better chance for shower
activity across the local islands, as well as thunderstorm
development.

Aviation...

vfr conditions are expected to prevail for the reminder
of the TAF period. This morning sfc winds 10 to 15 kts before
increasing to 15 to 20 kts with higher gusts by 16 14z. Isolated
showers are possible during the afternoon but any showers that might
form will be short-lived.

Marine...

a northerly swell will continue to slowly erodes across the
atlantic waters through the morning hours. Mariners can expect
seas between 5 and 7 feet across the atlantic offshore waters.

Elsewhere, seas between 4 and 6 feet. Winds will blow from the
east to east-northeast at 10 to 20 knots. A small craft advisory
is in effect across the atlantic waters until at least 11 am ast
today. However, rough and hazardous seas will return across the
offshore waters and caribbean waters later tonight.

For the beach goers, there is a high risk of rip currents along
the north facing beaches of puerto rico and culebra and along the
north facing beaches of saint thomas and saint john.

Preliminary point temps pops
Sju 84 77 84 77 20 20 30 30
stt 86 76 87 76 10 20 30 30

Sju watches warnings advisories
Pr... High rip current risk until 6 pm ast this evening for culebra-
north central-northeast-northwest-san juan and vicinity-
southeast-western interior.

Vi... High rip current risk until 6 pm ast this evening for
st.Thomas... St. John... And adjacent islands.

Am... High rip current risk until 6 pm ast this evening for coastal
waters of northern usvi and culebra out 10 nm-coastal
waters of southern usvi vieques and eastern puerto rico out
10 nm.

Small craft advisory from 2 am Sunday to 7 am ast Monday for
anegada passage southward to 17n-atlantic waters of puerto
rico and usvi from 10 nm to 19.5n-caribbean waters of
puerto rico from 10 nm to 17n-mona passage southward to 17n.

Short term... Ram
long term... .Ram


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 11 mi148 min 82°F1020.2 hPa
41053 - San Juan, PR 12 mi64 min ENE 14 G 18 81°F 1018.6 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 25 mi142 min 85°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 25 mi109 min ENE 5.1 87°F 1020 hPa71°F
AROP4 - 9757809 - Arecibo, PR 30 mi142 min NE 14 G 19
42085 - Southeast of Ponce, PR 36 mi94 min NE 7.8 G 12 84°F 82°F1017.8 hPa (+0.8)
41056 38 mi94 min ENE 16 G 18 81°F 4 ft1019.1 hPa (+0.9)
CLBP4 - 9752235 - Culebra, PR 47 mi142 min 83°F 82°F1019.6 hPa

Wind History for San Juan, PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Juan, Luis Munoz Marin International Airport, PR13 mi38 minNE 1310.00 miMostly Cloudy83°F75°F79%1019.1 hPa

Wind History from JSJ (wind in knots)
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Last 24hrE14E13E12E12E12
G17
E12E10E9E5E4E4SE3Calm3E7S3SE8S4SE4E11E9NE12
G21
NE11NE13
1 day agoNE13E14E13NE12E14E12E8E6SE5E4SE5SE3SE3CalmCalmS3S3CalmCalmSE3SE5E13E13E12
2 days agoNE9NE11SE6SE8S8S6S6S3CalmSW4S33CalmCalmS4S3CalmCalmS3CalmCalmCalm--E6

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Sat -- 12:59 AM AST     -0.10 feet Low Tide
Sat -- 05:18 AM AST     Moonrise
Sat -- 06:49 AM AST     Sunrise
Sat -- 08:12 AM AST     1.60 feet High Tide
Sat -- 02:44 PM AST     0.44 feet Low Tide
Sat -- 04:53 PM AST     Moonset
Sat -- 05:51 PM AST     Sunset
Sat -- 07:23 PM AST     0.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.1-00.20.50.91.21.51.61.61.41.10.80.60.50.40.50.70.80.90.90.70.50.3

Tide / Current Tables for San Juan, Puerto Rico
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San Juan
Click for Map
Sat -- 12:59 AM AST     -0.09 feet Low Tide
Sat -- 05:18 AM AST     Moonrise
Sat -- 06:49 AM AST     Sunrise
Sat -- 08:12 AM AST     1.61 feet High Tide
Sat -- 02:43 PM AST     0.46 feet Low Tide
Sat -- 04:53 PM AST     Moonset
Sat -- 05:51 PM AST     Sunset
Sat -- 07:23 PM AST     0.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.1-00.20.50.91.31.51.61.61.41.10.90.60.50.50.50.70.80.90.90.70.50.3

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

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (11,2,3,4)
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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 numerious 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.