Tuesday, June19, 2018 L-36.com

Marine Weather and Tides
Su�rez, PR

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:41AMSunset 6:58PM Tuesday June 19, 2018 11:27 PM AST (03:27 UTC) Moonrise 11:35AMMoonset 12:00AM Illumination 42% Phase: Waxing Crescent; Moon at 7 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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7 Day Forecast for Marine Location Near Su�rez, PR
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location: 23.03, -64.23     debug

Area Discussion for - San Juan, PR
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Fxca62 tjsj 200152
area forecast discussion
national weather service san juan pr
952 pm ast Tue jun 19 2018

Update Showers with thunderstorms affected the east and
southeast sections of puerto rico tonight. An area of showers and
thunderstorms moved from the coastal waters through an area
between guayama and yabucoa. Rainfall accumulations were between
one to two inches in localized areas. Rivers and streams across
these area were running high as 930 pm ast. Showers and
thunderstorms are expected to diminish overnight. However, some
showers are expected to affect the local area fro time to time

Aviation MainlyVFR conditions will prevail across all taf
sites through at least 20 12z. Vcsh are expected across tjps
overnight. Low level winds will continue mainly southeast at less
than 10 kts.

Marine No changes from previous discussions. Showers and
thunderstorms are expected to continue across the coastal waters.

Prev discussion issued 350 pm ast Tue jun 19 2018
synopsis... Tropical wave moving south of the islands will
continue to result in showers and thunderstorms across the
regional waters and over portions of the islands through
Wednesday. Tutt north of the region will sink and move just north
of the islands during the weekend. Broad surface high pressure
will continue across the central and northeastern atlantic for
the next several days. This will continue to promote an east to
southeast wind flow over the region. Next tropical wave enters the
eastern caribbean on Friday.

Short term... Today through Thursday...

a tropical wave interacting with an upper level trough will
continue to aid in the development of showers and thunderstorms
across the regional waters and over the islands during the
overnight hours through at least Wednesday afternoon. Frequent
lightning was observed today with the thunderstorms that developed
over the coastal waters of the usvi and briefly over the north
central and northwestern sections of pr. Another round of
scattered to locally numerous showers and thunderstorms are
expected on Wednesday afternoon over the interior and western
sections of puerto rico. Drier air with saharan dust are expected
to fill from the east by Wednesday evening and continue through
Thursday. This will limit shower activity across the region and
shower development should be confined to the western sections of
pr in diurnally induced afternoon convection.

Long term... Friday through Wednesday... (from previous

the surface ridge will maintain its hold over the region with
moderate to fresh easterly winds of 10 to 15 mph through the
period. A cut-off low to the north of puerto rico will continue to
move south until it reaches the northern portions of puerto rico
during the afternoon on Friday. At the same time a tropical wave
moves across the lesser antilles Friday morning, then affect the
u.S. Virgin islands during the afternoon, before arrive to puerto
rico later in the day. Due to the proximity of the upper level low
which will provide upper-level forcing, and the increase in low
level moisture due the approaching tropical wave; instability is
expected to increase over the area. Therefore, numerous to
scattered showers with isolated thunderstorms are expected through
the long-term period during the afternoon hours. Recent analysis
of the gdi shows values ranging from 35 to 40 which means theirs
potential for scattered thunderstorms with some having the
capability of producing heavy rain. The best upper level
divergence will be Saturday afternoon, as a result isolated
thunderstorms were put into the grids.

Sunday, the region will transition from a moist air mass to a
drier one as the tropical wave push east of the region as drier
air works in behind the the wave. The beginning of next week fair
weather returns with diurnal and locally induced showers during
the afternoon, mainly over the western portions of puerto rico.

Aviation... Shra tsra are expected to affect most of the local
terminal. MVFR or even ifr periods are expected at time over
tjsj tjbq tjmz tjps and tist tisx btwn 19 18-23z. Shra will continue
overnight across e-pr usvi. Tempo groups are in place for most of
the local TAF sites. Shra and tsra are expected to slowly dissipate
by late Wednesday afternoon. Winds are expected to continue from the
ese-se at 10 to 15 knots with sea breeze variations. Local stations
have been reporting gusty winds up to 30 kt with this activity.

Marine... Seas will continue to range between 3-5 feet and winds
will prevail from the east to southeast at 5-15 knots through at
least Thursday. Thunderstorms are expected overnight, mainly
across the caribbean waters and the coastal waters of the usvi.

A moderate risk of rip currents will continue on Wednesday across
the southern beaches of puerto rico and st. Croix.

Preliminary point temps pops
Sju 77 91 78 89 30 50 40 10
stt 80 87 80 89 50 30 20 10

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Fc
long term... .Ds

Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for
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Weather Map and Satellite Images
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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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (23,6,7,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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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.