Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Cata�o, PR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:26AMSunset 6:36PM Thursday March 21, 2019 7:29 AM AST (11:29 UTC) Moonrise 7:28PMMoonset 7:02AM Illumination 100% Phase: Full Moon; Moon at 15 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- 433 Am Ast Thu Mar 21 2019
Today..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tonight..Southeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. Scattered showers.
Friday..Southeast winds 15 to 20 knots backing east in the afternoon. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. North swell around 4 feet. Isolated showers.
Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 9 seconds. Isolated showers through the night.
Saturday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 10 seconds. Northeast swell around 4 feet. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 10 seconds. East swell around 4 feet. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 433 Am Ast Thu Mar 21 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the northeast atlantic and a weak surface low pressure over the western atlantic will continue to promote a gentle to moderate east to southeast wind flow through the end of the week. Seas are forecast to build early next week as a new surface high pressure develops over the north central atlantic increasing the trade winds across the northeast caribbean.


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 210848
afdsju
area forecast discussion
national weather service san juan pr
448 am ast Thu mar 21 2019

Synopsis Limited shower activity expected today across most of
the area except across northwest puerto rico where some showers
may develop in the afternoon. Higher moisture content on Friday
will guarantee a few rounds of scattered showers across portions
of puerto rico and the u.S. Virgin islands. Then, drier conditions
will follow on Saturday. Models are suggesting a wetter pattern
next week, stay tuned.

Short term Today through Saturday...

a weakly induced surface trough across the central and eastern
caribbean and high pressure across the northeast atlantic will
maintain a fairly light east to southeast wind flow across the
forecast area. For today, layered precipitable water and moisture
content is expected to continue to decrease as a drier airmass
will filter in and spread across the region resulting in less
cloud coverage and limited shower activity. Recent model guidance
and satellite imagery both suggest that these conditions are so
far forecast to persist at least until later tonight. Very limited
showers activity is expected along the coastal areas during the
rest of the morning hours with afternoon showers activity expected
to be focused mainly over parts of the central and northwest
sections of pr. Daytime high temperatures will be slightly above
normal along parts of the north coastal areas under the prevailing
southeast wind flow.

Expect increasing moisture and cloud cover with better chance for
passing early showers across the region once again by early Friday
and the rest of the day as an easterly perturbation will cross the
region. By Friday afternoon, the shower activity should then be
focused across parts of central and northwest puerto rico under the
expected low level wind flow. Limited afternoon shower activity is
expected elsewhere including over the u.S. Virgin islands where
mostly fair weather and sunny skies will prevail.

On Saturday, expect the local winds to become more easterly as
another surface high pressure ridge will build across the west
atlantic and reinforce the northeast atlantic high pressure ridge.

This in turn will increase the local pressure gradient and better
support the formation of localized streamer-like afternoon shower
activity mainly along parts of the interior and west sections of
puerto rico. Overall mostly fair weather skies can be expected for
the remainder of the islands on Saturday as mid to upper level ridge
will also remain in place an limit any convective development.

Long term Sunday through Wednesday...

an induced trough is forecast to move across the local caribbean
waters on Sunday. As a result, the moisture will surge across the
islands supporting scattered showers at times. At that time, the
upper level support is weak therefore no significant rainfall
accumulations are anticipated late in the weekend. GFS ensemble
mean show a front stalling north of the islands and a surface high
pressure moving over the north central atlantic on Monday. The
induced southeasterly flow will promote additional moisture
transport across the u.S. Virgin islands and puerto rico. Under
this pattern, wet trades winds will bring patches of moisture
from time to time resulting in a few rounds of scattered showers
across the local islands early next week. Then, a potent low
pressure system moves over the western atlantic by midweek pushing
it associated front closer to the region the second part of the
week. All in all, next week looks wetter and it is coinciding
with favorable mjo conditions across the basin.

Aviation Vfr cond will persist through the forecast prd.

Isold shra ovr regional waters and en route btw islands. Sct ocnl
bkn lyrs nr fl025... Fl050... Fl080. L lvl wnds fm e-se 5-15 kts blo
fl200 bcmg sw-w and incr W ht abv. Aftn shra mainly across the
central mtn range of pr as well as NW pr fm 21 17-21 23z. This may
bring brief MVFR conds at tjbq tjmz. Sfc wnds calm to light and
variable, bcmg e-se 10-15 kts with sea breeze variations aft
21 14z.

Marine Typical marine conditions are expected over the next few
days with seas ranging between 3-5 feet across the regional waters.

Winds will increase to 15-20 knots early next week, therefore
seas are forecast to build to 4-6 feet late Sunday into Monday.

Meanwhile, a moderate risk of rip currents for most of the
beaches along the north coast of puerto rico as well as for
culebrita beach through at least Friday.

Preliminary point temps pops
Sju 89 74 86 74 20 30 30 10
stt 85 75 84 73 20 40 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi47 min SE 7 G 8.9 75°F 79°F1015.5 hPa
41053 - San Juan, PR 1 mi59 min SSE 5.8 G 7.8 76°F 1014.5 hPa
AROP4 - 9757809 - Arecibo, PR 31 mi41 min SE 2.9 G 2.9
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi41 min 73°F 70°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi104 min N 1.9 74°F 1016 hPa67°F
41056 37 mi59 min ESE 12 G 14 78°F 1014.5 hPa
ESPP4 - 9752695 - Esperanza, PR 43 mi47 min ESE 8.9 G 12 78°F 78°F1015.3 hPa
CLBP4 - 9752235 - Culebra, PR 45 mi47 min 77°F 80°F1015.7 hPa
42085 - Southeast of Ponce, PR 47 mi89 min NE 7.8 G 7.8 80°F3 ft1013.9 hPa (+0.9)

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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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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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Boca De Cangrejos, Isla Verde, San Juan, Puerto Rico
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Boca De Cangrejos
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Thu -- 03:24 AM AST     0.00 feet Low Tide
Thu -- 06:27 AM AST     Sunrise
Thu -- 07:00 AM AST     Moonset
Thu -- 09:39 AM AST     1.29 feet High Tide
Thu -- 03:46 PM AST     0.07 feet Low Tide
Thu -- 06:35 PM AST     Sunset
Thu -- 07:27 PM AST     Moonrise
Thu -- 10:01 PM AST     1.37 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.40.2000.20.50.81.11.31.31.10.90.60.30.10.10.20.40.81.11.31.41.3

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (7,2,3,4)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.