Wednesday, January17, 2018 L-36.com


Marine Weather and Tides
Cata�o, 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 Wednesday January 17, 2018 4:51 AM AST (08:51 UTC) Moonrise 7:17AMMoonset 6:47PM Illumination 0% Phase: New Moon; 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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AMZ712 Coastal Waters Of Northern Puerto Rico Out 10 Nm- 347 Am Ast Wed Jan 17 2018
.small craft advisory in effect through late tonight...
Today..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell 4 to 6 feet. Scattered showers.
Tonight..East winds 10 to 15 knots. Seas 5 to 7 feet with occasional seas up to 9 feet. Dominant period 10 seconds. Northeast swell 4 to 6 feet. Scattered showers.
Thursday..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. North swell up to 5 feet. Isolated showers.
Thursday night..East winds 5 to 10 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 9 seconds. Isolated showers.
Friday..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 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
Sunday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 347 Am 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 system will remain to the west of this high pressure while an induced surface trough will linger north of the region until Friday. Another high pressure ridge will move into the western atlantic over the weekend. This will aid in maintaining a moderate trade wind flow across the regional waters. Hazardous seas are expected to continue through at least tonight.

7 Day Forecast for Marine Location Near Cata?o, PR
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location: 18.46, -66.12     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 170837
afdsju
area forecast discussion
national weather service san juan pr
437 am ast Wed jan 17 2018

Synopsis A mid to upper level ridge will gradually build from
the west and hold through the end of the week. Broad surface high
pressure across the north central atlantic will continue to
slowly weaken. A weak surface high build across the western
atlantic during the weekend. Moderate trades will continue for the
next several days.

Short term Today through Friday... A mid to upper level ridge of
high pressure will continue to provide easterly winds across puerto
rico and the u.S. Virgin islands through Friday. Near the surface a
surface trough sits north of the forecast area with little to no
impact to san juan and the u.S. Virgin islands.

The surface high pressure and low level moisture will be the
features that drives the local weather through Friday. The GFS model
shows precipitable water values decreasing for most of day today and
finally reaching a value less than 1.3 on Thursday morning. The gfs
strengthens the mid to upper level ridge which will limit low level
moisture over the islands but, the GFS quickly brings low moisture
back over the islands early Thursday morning. This forecast is
depended on the low level moisture if it decreases rapidly than
drier conditions will prevail and if low level moisture remains over
the puerto rico and the u.S. Virgin island then showers can be
expected.

Otherwise, easterly trade winds will cause isolated showers across
the coastal regions during the morning hours and then move inland
similar to a sea breeze during the afternoon. Similar to Tuesday
night there's a possibility that some showers could produce periods
of moderate to locally heavy rainfall and cause hazardous driving
conditions.

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.

Aviation Vfr conditions will prevail for the remainder of the
17 06z TAF period. Brief isold shra are possible over the coastal
waters and islands until 17 15z then shra will increase across most
terminals by 17 18z. Sfc winds light to variable then becoming
easterly by 17 12z 5 to 15 kts.

Marine Hazardous seas will continue through at least late
tonight. Therefore, small craft advisories remain in effect for
portions of the coastal waters. A gradual decrease in seas is
expected by Thursday... However small craft operators should
continue to exercise caution due to a slight chop and seas of 5-6
feet.

Preliminary point temps pops
Sju 83 73 84 75 30 30 20 10
stt 84 74 84 74 30 20 20 10

Sju watches warnings advisories
Pr... High rip current risk through late tonight for north central-
northeast-northwest-san juan and vicinity-southeast-western
interior.

Vi... High rip current risk through late tonight for st croix.

Small craft advisory until 2 pm ast this afternoon for
st.Thomas... St. John... And adjacent islands.

Am... Small craft advisory until 2 pm ast this afternoon for anegada
passage southward to 17n-coastal waters of southern usvi
vieques and eastern puerto rico out 10 nm-mona passage
southward to 17n.

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... 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 mi52 min 80°F1015.9 hPa (-1.5)
41053 - San Juan, PR 1 mi52 min SE 1.9 G 1.9 76°F 81°F5 ft1014.9 hPa (-1.5)
AROP4 - 9757809 - Arecibo, PR 31 mi52 min ESE 4.1 G 5.1
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi52 min 74°F
41056 38 mi52 min ENE 9.7 G 12 79°F 4 ft1015.4 hPa (-1.4)
CLBP4 - 9752235 - Culebra, PR 45 mi52 min 75°F 81°F1015.6 hPa (-1.4)
42085 - Southeast of Ponce, PR 47 mi112 min NNE 7.8 G 9.7 80°F 1014.6 hPa (-1.4)

Wind History for San Juan, PR
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Airport Reports
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Tide / Current Tables for San Juan, La Puntilla, San Juan Bay, Puerto Rico
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San Juan
Click for Map
Wed -- 02:30 AM AST     -0.23 feet Low Tide
Wed -- 06:59 AM AST     Sunrise
Wed -- 07:16 AM AST     Moonrise
Wed -- 09:49 AM AST     1.49 feet High Tide
Wed -- 04:21 PM AST     0.36 feet Low Tide
Wed -- 06:09 PM AST     Sunset
Wed -- 06:47 PM AST     Moonset
Wed -- 08:57 PM AST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.1-0.2-0.2-0.10.20.60.91.21.41.51.41.20.90.70.50.40.40.50.60.70.80.70.6

Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
Click for Map
Wed -- 03:01 AM AST     -0.06 feet Low Tide
Wed -- 06:59 AM AST     Sunrise
Wed -- 07:16 AM AST     Moonrise
Wed -- 10:19 AM AST     1.49 feet High Tide
Wed -- 04:54 PM AST     0.44 feet Low Tide
Wed -- 06:09 PM AST     Sunset
Wed -- 06:46 PM AST     Moonset
Wed -- 09:30 PM AST     0.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.20-0.100.20.50.81.11.41.51.51.31.10.80.60.50.40.50.60.70.80.80.7

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 (3,6,7,8)
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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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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.