Saturday, October19, 2019

Marine Weather and Tides
Suárez, PR

Version 3.4
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 Allen

Sunrise 6:12AMSunset 5:54PM Saturday October 19, 2019 6:00 PM AST (22:00 UTC) Moonrise 10:20PMMoonset 11:17AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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 191731
area forecast discussion
national weather service san juan pr
131 pm ast Sat oct 19 2019

A tropical wave moving through the area has brought increased
moisture. This will aid in the development of showers and isolated
thunderstorms due to local effects and diurnal heating, especially
in northwestern and interior puerto rico as well as the san juan
metro area. Locally heavy showers across pr could cause localized
flash flooding, and mudslides in areas of steep terrain. Tomorrow
will see development of showers and thunderstorms aided by lingering
moisture over the area. Near normal moisture levels are expected
through much of the week.

Short term Today through Monday...

there is increasing shower development over local caribbean
waters, as well as eastern and interior puerto rico. Additionally,
a line of showers containing thunderstorms has developed downwind
of st. Croix and vieques. The enhanced moisture from the tropical
wave will act to enhance shower and convective development this
afternoon from orographic forcings and diurnal heating. The area
that will be most affected by these showers and isolated
thunderstorms will be northwestern and interior puerto rico, as
well as the san juan metro area, though additional, more isolated,
activity is posible elsewhere. Locally heavy rainfall could cause
urban and small stream flooding, and there is the potential for
mudslides in areas of steep terrain as well.

Tomorrow, winds are forecast to shift to out of the east east-
northeast, under the influence of a low- to mid-level ridge located
to the north-northwest of the local islands. Because of this, the
highest potential for showers and isolated thunderstorms is in
western and interior puerto rico. Lingering moisture from the
tropical wave as it pulls away from the region will aid in the
development of this shower and convective activity, which is
expected to be somewhat limited compared to today. A slight drying
trend is expected for Monday, with mid-level moisture decreasing.

Despite this, there will still be some showers across the area, as
sufficient moisture is carried into the area at low-levels in the
trade winds.

Long term Tuesday through Saturday... From prev discussion...

as previously mentioned, on Tuesday and Wednesday, both a tutt
low and induced surface trough are forecast to develop and move
over the region. The upper trough is forecast to deepen north of
puerto rico on Tuesday, then become a cutoff low as it relocates
just southwest of pr by Wednesday and Thursday. At the same time,
the surface induced trough is forecast to move over the islands
from the east and increase low level moisture convergence and
instability across the region. The combination of these features
should result in an unsettled weather pattern at least through
Wednesday with good potential for enhanced early morning passing
showers along the coastal areas, followed by enhanced afternoon
convection each day. On Thursday, although the surface trough
will move farther west of the islands, the tutt low is to linger
just southwest of pr and should therefore still provide marginal
instability aloft to support some enhanced afternoon convection.

This should be focused mainly over northwest and the central
interior sections of puerto rico. Isolated to scattered afternoon
showers will also be possible in and around the usvi and the san
juan metro. By Friday, a tropical wave is forecast to enter and
move across the eastern caribbean. At this time model guidance
still suggests that most of the associated moisture and
significant rainfall should pass south of the local islands
through Saturday. However, early morning showers and isolated to
scattered afternoon convection cannot be ruled out each day.

Tempo MVFR to brief ifr conditions due to shra tsra are
possible through 23z at tjsj tjbq tjmz. Across the rest of the
terminals, mainly vcsh vcts is expected. East-southeast winds at 10
to 15 knots with sea breeze variations and higher gusts will prevail
through at least 21z. Light and variable winds are expected
overnight across all terminals.

Marine conditions are expected to continue much as they have, with
wave heights around 5 feet or less. Prevailing winds out of the east
to southeast are forecast to be around 10-15 knots, with higher
gusts. Continuing development of showers and thunderstorms is
expected across regional waters today, enhanced by the passage of a
tropical wave across the caribbean waters.

Preliminary point temps pops
Sju 77 89 78 88 20 20 20 30
stt 78 88 78 88 30 30 30 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Ds
long term... .Crs

Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for
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Weather Map
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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 (18,4,5,8)
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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 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 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.