Friday, August23, 2019 L-36.com


Marine Weather and Tides
Santo Domingo, PR

Version 3.4
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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 6:10AMSunset 6:49PM Friday August 23, 2019 2:24 AM AST (06:24 UTC) Moonrise 12:00AMMoonset 12:41PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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- 902 Pm Ast Thu Aug 22 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. Scattered showers.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Friday night..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Saturday 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.
Sunday..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..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 902 Pm Ast Thu Aug 22 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 east southeast wind flow through Monday. Moisture behind a weak tropical wave will maintain passing showers and isolated Thunderstorms mainly during the daytime. Conditions near these showers and where winds are greater will be choppy.


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 230039
afdsju
area forecast discussion
national weather service san juan pr
839 pm ast Thu aug 22 2019

Update Forecast remains on track. Lingering low-level moisture
associated with a departing weak tropical wave will persist over
the area through Friday. This will result in some passing showers
across portions of southeastern and eastern puerto rico as well as
across portions of the usvi during the overnight and early
morning hours of Friday. Then, as the low-level moisture combines
with strong daytime heating and local effects, scattered showers
and isolated thunderstorms will develop and affect portions of
northwest puerto rico and possibly downwind of the usvi and el
yunque, affecting the san juan metro area, during the early to
mid-afternoon hours. Given that there will be a mid to upper-level
ridge near the area, upper-level dynamics are expected to remain
non-existent. In addition, the low-level flow will remain pretty
fast from the east-southeast between 15 and 20 knots. These
factors will limit the intensity as well as the duration of the
showers, therefore, significant rainfall accumulations are not
expected.

Aviation MainlyVFR conditions are expected during the forecast
period. Vcsh expected across tjsj tisx tist tncm tkpk. Sct
shra tsra expected across northwest pr between 23 16z and 22 23z,
affecting the vicinity of tjmz tjbq. Brief MVFR conditions are
possible. Light and variable winds overnight, increasing to 10 to
20 kts with higher gusts from ese with sea breeze variations
developing after 23 13z.

Marine Choppy seas up to 6 feet expected across the atlantic
waters, therefore, small craft operators should exercise caution.

Seas of up to 5 feet expect elsewhere. Winds are expected to range
between 10 and 20 knots from the east. There is a moderate risk
of rip currents across the northern and southeastern beaches of
puerto rico and across most of the beaches of vieques, culebra,
and saint croix through tonight. In addition to these
aformentioned areas, the moderate risk of rip currents will
extend to the southwestern beaches of puerto rico as well as the
northwestern beaches of saint thomas on Friday.

Prev discussion issued 145 pm ast Thu aug 22 2019
synopsis... Passing tropical wave and associate plume of moisture
will affect the region through Friday. Relative stable conditions
are expected on Saturday, before the next tropical wave
approaches the region late Saturday night into Sunday. Although
the entrance of relatively drier and stable air mass accompanied
by suspended saharan dust will dominate the local area, locally
induced showers are expected each afternoon. Lack of upper level
support will limit thunderstorm development.

Short term... Tonight through Saturday...

remnants from afternoon shower and thunderstorm activity is
expected to linger across portions of northwestern puerto rico and
waters west of puerto rico through the evening hours. During the
overnight and early morning hours, showers and possible isolated
thunderstorms, associated to a passing tropical wave, are expected
to affect the regional waters and portions of eastern puerto rico
and the u.S. Virgin islands. As the day progresses, locally
induced showers are expected to develop over the northwestern
quadrant of puerto rico, as well as downwind from the local
islands and sierra de luquillo. Although upper level support for
thunderstorm development is not expected, isolated thunderstorms
cannot be ruled out in the afternoon. Localized urban and small
stream flooding possible across the northwestern quadrant of the
island.

Somewhat improved conditions are expected between late Friday
night into Saturday. However, locally induced showers are
possible, particularly during the afternoon hours. If any, above-
normal temperatures and heat index will be a threat during this
period.

Long term... Sunday through Wednesday...

prev discussion... Issued 503 am ast Thu aug 22 2019
Sunday, residual moisture associated with a tropical wave will linger
through the early afternoon on Sunday. The moisture coupled with
daytime heating and local effects will yield showers and
thunderstorms during the afternoon across the interior and western
areas of puerto rico. There is a possibility for urban and small
stream flooding during the afternoon in flood prone areas. Sunday
evening the moisture will abate as a dry saharan air mass push in
from the east atlantic. The dry saharan air is forecast to persist
through early part of the next week. Therefore, expect hazy skies
with isolated to scattered showers mainly during the afternoon with
the chance for isolated thunderstorms over western puerto rico. Once
again showers will develop due to daytime heating and local effects.

However, due to modest low-level moisture and limited upper-level
instability as a result of mid to upper-level ridges showers will be
short-lived. By Tuesday the 700 mb high shift to the southwest this
shift in the high will allow the tropical moisture to pool into the
region from the east. The return of the deep tropical moisture will
cause the dry saharan air to diminish over the region. Also, the
tropical moisture will aid in the development of showers and
isolated thunderstorms during the afternoon especially over and
south of the cordillera central through the middle of the week.

Aviation... Brief periods of MVFR conds will remain possible at jbq
in shra tsra through about 22 22z. As the tropical wave moves away
tonight, conditions will improve with vcsh possible at the leeward
and usvi terminals overnight. Ese winds at 10 to 15 knots with some
sea breeze variations through 22 22z becoming light and variable
overnight.

Marine... Choppy marine conditions with seas up to 6 feet and
winds up to 20 knots expected across the atlantic waters. Thus,
small craft operators should exercise caution across these areas.

Elsewhere, tranquil marine conditions with seas up to 5 feet and
winds up to 15 knots are expected to prevail. There is a moderate
risk of rip currents for the northern and southeastern beaches of
puerto rico, as well as most beaches of vieques, culebra and saint
croix.

Preliminary point temps pops
Sju 78 91 78 90 40 10 50 50
stt 80 91 80 88 40 30 40 40

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Gl
long term... .Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi55 min E 4.1 G 6 82°F 85°F1016.9 hPa
MGZP4 - 9759394 - Mayaguez, PR 23 mi61 min 81°F 86°F1017 hPa
AROP4 - 9757809 - Arecibo, PR 26 mi55 min Calm G 0
JOXP4 - Jobos Bay Reserve, Puerto Rico 30 mi100 min N 1.9 77°F 1018 hPa73°F
PTRP4 32 mi20 min ESE 4.1 G 6 78°F
41115 - Rincon, Puerto Rico (181) 34 mi55 min 84°F2 ft
SJNP4 - 9755371 - San Juan, PR 42 mi55 min ESE 6 G 7 82°F 85°F1016.9 hPa
41053 - San Juan, PR 43 mi85 min ESE 9.7 G 14 83°F 84°F4 ft1015.8 hPa (-0.8)
YABP4 - 9754228 - Yabucoa Harbor, PR 49 mi55 min 81°F 75°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
Fri -- 04:55 AM AST     0.17 feet Low Tide
Fri -- 06:10 AM AST     Sunrise
Fri -- 10:58 AM AST     Last Quarter
Fri -- 12:40 PM AST     Moonset
Fri -- 04:00 PM AST     0.78 feet Low Tide
Fri -- 05:56 PM AST     0.78 feet High Tide
Fri -- 06:47 PM AST     Sunset
Fri -- 10:37 PM AST     0.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.50.40.20.20.20.20.30.40.50.60.70.80.80.80.80.80.80.80.80.80.80.8

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 (2,6,7,8)
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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.