Saturday, January19, 2019 L-36.com


Marine Weather and Tides
Santo Domingo, 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 7:00AMSunset 6:15PM Saturday January 19, 2019 10:23 PM AST (02:23 UTC) Moonrise 4:47PMMoonset 5:16AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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AMZ735 Coastal Waters Of Southern Puerto Rico Out 10 Nm- 918 Pm Ast Sat Jan 19 2019
Rest of tonight..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Sunday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Sunday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 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 showers.
Monday night..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers through the night.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Isolated showers.
AMZ700 918 Pm Ast Sat Jan 19 2019
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure across the northeast atlantic and a weakening low pressure system northeast of the area will continue to move eastward, promoting a gentle to moderate easterly wind flow. A cold front and the associated area of low pressure will enter and move across the western atlantic by Sunday. Another long dominant period northwesterly swell is forecast to arrive across the local atlantic waters by Tuesday.


7 Day Forecast for Marine Location Near Santo Domingo, PR
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location: 18.1, -66.75     debug


Area Discussion for - San Juan, PR
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Fxca62 tjsj 200123
afdsju
area forecast discussion
national weather service san juan pr
923 pm ast Sat jan 19 2019

Update
A relatively quiet weather prevailed across most portions of
puerto rico except for portions of the interior, and southwest
puerto rico this afternoon. Rainfall amount across the southwest
and interior ranged from half to a inch, with heavier amounts in
isolated locations. A drier air mass, as well as, a mid and upper
level ridge help produce these conditions across the region. The
mid and upper level ridge will continue to build across the area,
thus provide tranquil weather through Monday. Tonight an isolated
shower is possible mainly across the eastern areas of puerto
rico, winds will be out of the east to southeast at 5 to 10 kts.

Aviation...

vrf conds will continue across all terminal sites through 20 18z.

Tonight sfc winds will become light and variable, then tomorrow
winds will be out of the east to northeast at 10 to 15 kts with
higher gusts.

Marine
Marine conditions will remain relatively quiet through the
weekend with seas of 3 to 5 feet, with easterly winds of 10 to 20
knots. Small craft operators should exercise caution due to the
stronger winds across the local waters. There is a moderate risk
of rip currents for the northwestern to northeastern beaches of
puerto rico as well as vieques and culebra.

Prev discussion issued 505 pm ast Sat jan 19 2019
synopsis... Mid to upper-level ridge will continue to build and
amplify across the region through at least the middle of the week,
providing a fairly stable weather pattern with mainly fair weather
conditions expected. Surface high pressure is expected to move
across the western atlantic by the middle portion of next week
and increase the winds across the area as the pressure gradient
increases.

Short term... Tonight through Monday...

a drier than normal air mass will prevail over the region as a
mid to upper-level ridge will continue to build and amplify
overhead. Therefore, mainly fair weather conditions can be
expected across most of the region through the short-term period.

Having said that, occasional small patches of low-level moisture
embedded within the trades will move across the region. This can
lead to brief showers moving across the local waters and affecting
portions of eastern pr and the usvi during the overnight and
early morning hours. This will be followed by the development of
some showers across interior and western pr during the afternoon
hours as a result of daytime heating and local effects. Given that
the mid to upper-levels of the atmosphere will remain very dry,
the showers that do develop should be short-lived and only result
in minor accumulations.

Long term... Tuesday through Saturday (from previous
discussion)...

overall dry and stable conditions is forecast to continue at
least through Wednesday, as the mid to upper level ridge will
build and extend northward across the region. This in turn will
erode low- level moisture convergence and at the same time strengthen
the trade wind cap inversion. Model guidance also continued to suggest
decreasing layered precipitable water values to less than an inch
at least until Wednesday. By the latter part of the week the local
pressure gradient is to tighten across the region as the surface
high builds north of the forecast area while spreading across the
west and central atlantic. This will cause an increase in the east
to northeast trade winds and consequently increase the moisture
advection from an old frontal boundary which is forecast to sink
southward into the tropical atlantic. As a result, an increase in
moisture transport is forecast for the latter part of the week and
into the weekend with breezy conditions and periods of quick
passing clouds and showers during the overnight and early morning
hours. During the daytime, isolated to scattered afternoon showers
will remain possible mainly over parts of central and west to
northwest sections of pr, and mostly downwind of the usvi.

Aviation...VFR conds will prevail thru the forecast period as fair
weather pattern will continue across the local islands. Some showers
will develop near tjmz but no significant impacts to visibility or
ceilings are anticipated at this time. Easterly winds of 10-15 kts
with gusts up to 20 kts, then becoming light and variable
overnight.

Marine... Seas between 2 and 5 feet will continue to prevail
across the regional waters through Monday. Slightly higher winds,
between 15 and 20 knots, are expected on Sunday across the
regional waters. Therefore, small craft operators should exercise
caution due to these higher winds. Another long dominant period
northwesterly swell is expected to arrive across the atlantic
waters by Tuesday.

A moderate risk of rip currents will be in effect for several of
the local beaches for Sunday. The west coast of pr will continue
to see a low risk of rip currents.

Preliminary point temps pops
Sju 72 85 73 86 20 20 20 20
stt 72 83 73 83 20 20 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Tw
long term... .Gl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi42 min ENE 1.9 G 5.1 75°F 78°F1017.9 hPa
42085 - Southeast of Ponce, PR 20 mi84 min ENE 12 G 14 81°F 80°F3 ft1016.7 hPa (+1.6)
MGZP4 - 9759394 - Mayaguez, PR 23 mi42 min 74°F 82°F1017.8 hPa
AROP4 - 9757809 - Arecibo, PR 26 mi36 min SE 5.1 G 5.1
JOXP4 - Jobos Bay Reserve, Puerto Rico 30 mi99 min NE 4.1 75°F 1019 hPa67°F
PTRP4 32 mi29 min E 5.1 G 7 74°F
41115 - Rincon, Puerto Rico (181) 34 mi54 min 80°F3 ft
SJNP4 - 9755371 - San Juan, PR 42 mi42 min E 6 G 8 77°F 80°F1018.6 hPa
41053 - San Juan, PR 43 mi54 min ESE 9.7 G 12 78°F 1017.6 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 49 mi36 min 78°F 69°F

Wind History for Penuelas (Punta Guayanilla), PR
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Airport Reports
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Tide / Current Tables for Punta Guayanilla, 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 Playa de Ponce, Puerto Rico
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Playa de Ponce
Click for Map
Sat -- 05:15 AM AST     Moonset
Sat -- 07:00 AM AST     Sunrise
Sat -- 09:35 AM AST     0.68 feet High Tide
Sat -- 10:35 AM AST     0.56 feet Low Tide
Sat -- 04:47 PM AST     Moonrise
Sat -- 05:05 PM AST     0.59 feet High Tide
Sat -- 06:13 PM AST     Sunset
Sat -- 10:22 PM AST     -0.61 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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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Wind Forecast for (21,6,7,8)
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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.