Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Cata�o, PR

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:07AMSunset 6:46PM Saturday August 24, 2019 7:51 AM AST (11:51 UTC) Moonrise 12:15AMMoonset 1:35PM Illumination 35% Phase: Waning Crescent; Moon at 24 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- 419 Am Ast Sat Aug 24 2019
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Sunday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers in the morning, then isolated Thunderstorms in the afternoon.
Sunday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers.
Monday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated Thunderstorms. Scattered showers.
Tuesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers.
Wednesday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 10 seconds. Scattered showers. Isolated Thunderstorms.
AMZ700 419 Am Ast Sat Aug 24 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure over the north central atlantic will continue to promote a moderate east to southeast wind flow through Monday. Moisture behind a weak tropical wave will aid in developing passing showers and isolated Thunderstorms over the local waters late today. Drier dusty air will arrive early next week associated with somewhat stronger winds.


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 240951 cca
afdsju
area forecast discussion... Corrected
national weather service san juan pr
551 am ast Sat aug 24 2019

Synopsis
A weak tropical wave will increase moisture and instability across
the local islands through at least early Sunday morning. A dry air
mass with a dense saharan air layer will limit shower activity and
create hazy skies by Sunday morning into early next week.

Unsettled weather conditions will return by mid-week of the
upcoming week.

Short term Today through Monday...

goes-16 IR shows a shallow patch of moisture moving across the
leeward islands. This moisture is associated with a weak tropical
wave that has moved into the northeast caribbean waters early this
morning, this wave will move across the region through early
Sunday morning. This tropical wave will produce isolated to
scattered showers this morning across the u.S. Virgin islands and
eastern areas of puerto rico. Most of these showers, however, should be
brief and only lead to minor rainfall accumulations. Later this
afternoon the moisture is expected to continue to advance to the
west. The combination of low-level moisture, local effects and
diurnal heating will initiate showers and isolated thunderstorms
across the interior, western and metro areas of puerto rico.

In addition, 00z high-res WRF model develops streamers downwind of
the u.S. Virgin islands and across metro areas of san juan this
afternoon. Streamers that do develop could cause urban and small
stream flooding especially if they develop over san juan metro areas.

Sunday, moisture will linger across the area and induce isolated to
scattered showers across most of the region. Then a dry saharan air
mass is forecast to advance into the u.S. Virgin islands and eastern
puerto rico late in the afternoon. This dense air layer will limit
shower activity across the aformentioned areas late Sunday
afternoon. The saharan air will continue to progress to the west
across other areas of the island by Sunday evening resulting in hazy
skies and limited shower activity late Sunday evening into Monday
night.

Long term Tuesday through Friday...

for Tuesday, the aforementioned saharan air layer is forecast to
exit the region by late Tuesday night into early Wednesday
morning. Therefore, hazy skies with limited shower activity will
persist.

Model guidance are suggesting unsettled weather conditions
associated with a low-pressure system Wednesday through early
Friday morning. At this time, the national hurricane center (nhc)
is monitoring this system, which is located about a thousand
miles east of the windward islands. Environmental conditions
appear conducive for additional development and the NHC is giving
a medium chance of formation in the next 48 hours and a high
chance through the next 5 days. There is plenty of uncertainty
regarding the intensity of this disturbance, but giving the
potential for development into a more organize system, we will
continue monitoring this situation. A more seasonable weather
pattern is forecast to return by Saturday.

Aviation
MainlyVFR conditions are expected to persist through the forecast
period. Vcsh expected across eastern pr, usvi and leeward island
terminals through 24 18z. Shra tsra across metro areas of pr and
western terminals of pr by 24 16z, then over terminals tjbq and
tjmz by 24 18z. Shra tsra could cause brief MVFR conds. Winds will
be out of the east to southeast at 10 to 20 kts with higher gusts
and sea breeze variation starting by 24 14z.

Marine Seas up to 5 feet and winds around 15 knots are
expected across the local waters through much of the forecast
period. If marine guidances are correct, an active tropical wave
will deteriorate the marine weather conditions by mid-week of the
upcoming week.

For the beach goers, there is a moderate risk of rip current for
most of the local beaches of puerto rico and the u.S. Virgin
islands today.

Preliminary point temps pops
Sju 90 79 91 80 50 50 20 20
stt 90 81 89 80 40 40 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Tw
long term... .Cam
aviation... Tw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJNP4 - 9755371 - San Juan, PR 0 mi52 min ESE 4.1 G 5.1 82°F 85°F1017.2 hPa (+1.0)
41053 - San Juan, PR 1 mi52 min SSE 3.9 G 5.8 82°F 84°F4 ft1016.1 hPa (+1.0)
AROP4 - 9757809 - Arecibo, PR 31 mi52 min SSE 5.1 G 6
YABP4 - 9754228 - Yabucoa Harbor, PR 32 mi52 min 81°F 77°F
JOXP4 - Jobos Bay Reserve, Puerto Rico 35 mi67 min NNE 2.9 79°F 1018 hPa76°F
41056 37 mi52 min E 12 G 14 84°F 85°F2 ft1016.8 hPa (+1.0)
ESPP4 - 9752695 - Esperanza, PR 43 mi52 min ESE 6 G 11 85°F 84°F1017.2 hPa (+1.0)
CLBP4 - 9752235 - Culebra, PR 45 mi58 min 83°F 86°F1017.1 hPa

Wind History for San Juan, PR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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Click EDIT to select an airport
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
Click for Map
Sat -- 12:14 AM AST     Moonrise
Sat -- 02:24 AM AST     0.83 feet High Tide
Sat -- 06:07 AM AST     Sunrise
Sat -- 09:10 AM AST     0.04 feet Low Tide
Sat -- 01:34 PM AST     Moonset
Sat -- 04:48 PM AST     1.29 feet High Tide
Sat -- 06:44 PM AST     Sunset
Sat -- 11:20 PM AST     0.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.80.80.80.70.60.40.20.100.10.20.40.70.91.11.31.31.21.10.90.80.70.6

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.
Link to Loop

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.