Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Cataño, 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 6:58AMSunset 6:11PM Thursday January 18, 2018 9:27 AM AST (13:27 UTC) Moonrise 8:01AMMoonset 7:38PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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- 344 Am Ast Thu Jan 18 2018
.small craft should exercise caution...
Today..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Northeast swell 4 to 5 feet. Isolated showers.
Tonight..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Northeast swell 4 to 5 feet in the evening. Isolated showers.
Friday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Isolated showers.
Friday night..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
Saturday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. North swell 4 to 7 feet. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. North swell 4 to 7 feet. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 344 Am Ast Thu Jan 18 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 Cataño, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 180828
afdsju
area forecast discussion
national weather service san juan pr
428 am ast Thu jan 18 2018

Synopsis 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, and
the eastern half of puerto rico each day, as well as afternoon
convection across western puerto rico. A similar pattern will
prevail through the end of the work week.

Short term Today through Saturday... Mid to upper level ridge
will influence puerto rico and the u.S. Virgin islands weather, by
creating a trade wind cap over the area. Recent sju skew-t shows
drier air at 700 to 400 mb which will inhibit vertical development
of cloud tops for afternoon thunderstorms but, an occasional passing
shower will be possible today through Saturday.

At the lower levels of the atmosphere tropical moisture will
periodically move in from the east through late Friday thus aiding
in shower development. Saturday, the GFS brings a patch of drier air
that will limit shower activity but this drier air will move out
quickly before another surge of low level moisture moves in on
Sunday. Otherwise, pleasant weather will prevail through late Sunday
with daytime high temperatures near the mid 80s at lower elevations
and upper 70's at higher elevations.

Long term Sunday through Friday... Very dry weather conditions
are expected to prevail across the local area Sunday into early
Monday next week. Although upper level ridge will hold across the
region Monday and beyond, better moisture at lower levels will
induce the development of some showers across the local islands.

At this time,no significant weather events are forecast to affect
the local region in the near future.

Aviation Vfr conds expected across the local terminals through
the remainder of the 18 06z TAF period. Isold shra are possible over
the coastal waters and islands today with shra decreasing by 19 00z.

Sfc winds sfc winds light to variable then becoming easterly by
18 08z 5 to 15 kt.

Marine Seas has diminished below 7 feet across all local
waters. However, seas up to 6 feet are still occurring across
most coastal waters. As a result, small craft should exercise
caution. Winds between 10 to 15 kts are expected.

Preliminary point temps pops
Sju 85 75 84 74 30 20 20 20
stt 84 74 84 74 20 20 20 10

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Tw
long term... .Fc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi45 min 81°F1017.6 hPa
41053 - San Juan, PR 1 mi57 min S 3.9 G 3.9 78°F 1016.5 hPa
AROP4 - 9757809 - Arecibo, PR 31 mi39 min SSE 5.1 G 6
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi39 min 80°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi102 min N 1.9 73°F 1016 hPa67°F
41056 38 mi57 min ENE 7.8 G 7.8 79°F 1017 hPa
CLBP4 - 9752235 - Culebra, PR 45 mi39 min 78°F 81°F1017.5 hPa
42085 - Southeast of Ponce, PR 47 mi87 min NNE 7.8 G 9.7 80°F 81°F1015.6 hPa (+1.5)

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, PR7 mi31 minSE 310.00 miA Few Clouds79°F73°F82%1017.6 hPa

Wind History from JSJ (wind in knots)
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Last 24hrSE6E9E13NE11NE13E13E16E13E10E6E5E4SE8SE3CalmE3CalmCalmCalmCalmCalmCalmCalmSE3
1 day agoE8E12E13NE15E14E14NE14E12SE5E5SE5SE5E8S4SW3SW3SE5CalmCalmCalmCalmCalmS4E5
2 days agoE12
G17
E11NE10E11E11E6E5E8SE4NE6SE4CalmCalmCalmCalmCalmCalmCalmE5Calm6CalmSE33

Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Thu -- 03:08 AM AST     -0.18 feet Low Tide
Thu -- 06:59 AM AST     Sunrise
Thu -- 08:00 AM AST     Moonrise
Thu -- 10:24 AM AST     1.49 feet High Tide
Thu -- 04:57 PM AST     0.35 feet Low Tide
Thu -- 06:10 PM AST     Sunset
Thu -- 07:37 PM AST     Moonset
Thu -- 09:41 PM AST     0.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.1-0.1-0.2-0.10.10.40.71.11.31.51.51.31.10.80.60.40.40.40.50.70.80.80.7

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Thu -- 03:39 AM AST     -0.03 feet Low Tide
Thu -- 06:59 AM AST     Sunrise
Thu -- 08:00 AM AST     Moonrise
Thu -- 10:52 AM AST     1.46 feet High Tide
Thu -- 05:24 PM AST     0.43 feet Low Tide
Thu -- 06:09 PM AST     Sunset
Thu -- 07:37 PM AST     Moonset
Thu -- 10:10 PM AST     0.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.30.1-0-00.10.30.60.91.21.41.51.41.210.70.50.40.40.50.70.80.80.8

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 (8,2,3,4)
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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.