Monday, July6, 2020
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Marine Weather and Tides
Santo Domingo, PR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 5:56AMSunset 7:08PM Monday July 6, 2020 6:48 PM AST (22:48 UTC) Moonrise 8:40PMMoonset 7:09AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 327 Pm Ast Mon Jul 6 2020
.small craft should exercise caution...
Tonight..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Tuesday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers through the night. Isolated Thunderstorms after midnight.
Wednesday..Southeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers in the morning. Isolated Thunderstorms through the day.
Wednesday night..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Friday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Saturday..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Scattered showers. Isolated Thunderstorms.
AMZ700 327 Pm Ast Mon Jul 6 2020
Synopsis for puerto rico and the uS. Virgin islands waters... A surface high pressure will continue across the northeast central atlantic. A weak tropical wave will continue to move through the area today. A second wave with better showers and isolated Thunderstorms will move through Tuesday night and Wednesday. This will produce moderate to fresh easterly trade winds. As a result, seas will become hazardous for the outer atlantic waters Tuesday and Wednesday with choppy seas elsewhere.


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 062015 AFDSJU

Area Forecast Discussion National Weather Service San Juan PR 415 PM AST Mon Jul 6 2020

SYNOPSIS.

A patch of drier air over the area has limited the development of widespread showers this afternoon; however, showers and thunderstorms developed over the western and the interior areas of Puerto Rico. A vigorous tropical wave currently east of the Windward Islands will reach the local area by Tuesday. As the wave moves through the region, it will increase rain chances for Puerto Rico and the U.S. Virgin Islands.

SHORT TERM. Rest of Today through Wednesday .

Increasing moisture is expected for the rest of this afternoon into tonight as a weak - and continuing to weaken and fall apart - tropical wave pushes into the area. This increasing moisture could help to support some late afternoon convection, though activity will remain within climatological normals. Late tonight into tomorrow, a brief patch of slightly drier air will be seen during the first part of the day, ahead of the arrival of another tropical wave. As such, overnight and morning showers are likely to be somewhat inhibited.

Around midday on Tuesday, another tropical wave is forecast to enter the region. This wave is much more vigorous than the one that is approaching today; on satellite imagery, a fairly large area of convective activity can be seen associated with this wave. Even should the wave weaken, as has been the trend of the last few weeks, it is likely that a good amount of moisture will impact the local islands. Above average values of precipitable water are currently anticipated, which will help to support convective activity due to local effects and diurnal heating. The peak in moisture will likely be during the overnight hours Tuesday night into Wednesday, with some moisture lingering into the afternoon. Meanwhile, at the mid- levels, the ridge will be weakening its grip over the region, though it will weakly maintain some influence around 500 hPa throughout. This will help to increase somewhat the favorability for convection aloft. As such, above-normal shower and thunderstorm activity is expected for the later part of the afternoon tomorrow. Showers and isolated thunderstorms are also expected during the overnight hours and into the morning, with the peak activity in the east, affecting the local waters, eastern Puerto Rico, and the U.S. Virgin Islands. On Wednesday, lingering moisture is likely to help support the development of afternoon showers and thunderstorms, especially in western Puerto Rico, where peak activity would normally be expected anyway, and where the moisture will last later into the afternoon. Drying is expected in the east starting in the afternoon, at which point rainfall activity is likely to drop off.

LONG TERM. Thursday through Monday . From Prev Discussion .

The upper air pattern is chaotic during the period Thursday through Saturday as minor low pressures form around Puerto Rico and the U.S. Virgin Islands and flow remains variable up to 25 knots. Mid levels are more consistent with high pressure remaining just north of the area in an east-west ridge. At lower levels areas of drier air approach Puerto Rico from the east, but are really only able to dominate between 850 and 300 mb with breaks on Wednesday, (the day before) and on Sunday from passing tropical waves. Lower levels, however, remain fairly moist.

Hence convection forms each day in east to east southeast flow in the typical diurnal pattern for Puerto Rico and the U.S. Virgin Islands; that is with isolated occasionally scattered showers over the local waters and occasionally crossing over the USVI and into eastern Puerto Rico during the night and morning hours and afternoon showers and thunderstorms heavy enough to produce ponding on roadways and low-lying areas and occasionally localized urban and small stream flooding. Afternoon convection downstream from the USVI is also likely. All of the convection will be limited by the extensive dry layer above 5-7 kft each day. No other significant features are seen impacting the area for the next 10 days.

AVIATION.

SHRA/TSRA will continue near terminals TJBQ and TJMZ through 07/03Z. This activity could cause brief MVRF conds near the terminal sites. Elsewhere, VRF conds are prevailing with the possibility for a few ISO/SCT SHRA. Winds are from the east at 15 to 20 kts.

MARINE.

Choppy seas up to 6 feet across the Atlantic waters this afternoon, then seas are expected to increase up to 7 feet by tomorrow morning. Elsewhere, seas up to 5 feet now through tonight; then seas will increase to 5 feet by Tuesday morning. Winds will be from the east at 15 to 20 kts. Tuesday, there is a small craft advisory in effect for the outer Atlantic waters. Also, due to winds up to 20 kts small craft operators are should exercise caution. A moderate risk of rip currents for most of the local beaches.

PRELIMINARY POINT TEMPS/POPS. SJU 79 90 78 91 / 40 30 70 50 STT 82 90 82 91 / 30 50 60 40

SJU WATCHES/WARNINGS/ADVISORIES. PR . None. VI . None. AM . Small Craft Advisory from 2 PM Tuesday to 8 PM AST Wednesday for Atlantic Waters of Puerto Rico and USVI from 10 NM to 19.5N.



SHORT TERM . DS LONG TERM . CRS PUBLIC DESK . CRS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi48 min NNE 6 G 9.9 84°F 86°F1015.2 hPa (+0.4)
42085 - Southeast of Ponce, PR 20 mi108 min E 21 G 25 86°F 85°F5 ft1012.9 hPa (-1.0)
MGZP4 - 9759394 - Mayaguez, PR 23 mi48 min 80°F 86°F1016 hPa (-0.0)
JOXP4 - Jobos Bay Reserve, Puerto Rico 30 mi63 min E 6 89°F 1016 hPa75°F
PTRP4 32 mi13 min ENE 6 G 9.9 81°F
41115 - Rincon, Puerto Rico (181) 34 mi22 min 85°F2 ft
SJNP4 - 9755371 - San Juan, PR 42 mi48 min E 16 G 19 85°F 86°F1015.6 hPa (-0.5)
41053 - San Juan, PR 43 mi48 min E 14 G 18 85°F 85°F1014.6 hPa (-0.4)

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
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Mon -- 02:17 AM AST     0.73 feet Low Tide
Mon -- 05:56 AM AST     Sunrise
Mon -- 06:21 AM AST     0.73 feet High Tide
Mon -- 07:08 AM AST     Moonset
Mon -- 12:20 PM AST     -0.28 feet Low Tide
Mon -- 07:06 PM AST     Sunset
Mon -- 08:39 PM AST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.80.70.70.70.70.70.70.70.50.2-0.1-0.3-0.3-0.2-0.2-00.10.20.40.50.60.70.8

Weather Map
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wmap_A
GEOS 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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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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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 numerous 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.