Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Santo Domingo, PR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:01AMSunset 7:06PM Thursday July 20, 2017 6:45 PM AST (22:45 UTC) Moonrise 3:06AMMoonset 4:26PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 315 Pm Ast Thu Jul 20 2017
Tonight..Northeast winds 10 to 15 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.
Friday 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.
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 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 8 seconds. Isolated showers.
Tuesday..East winds 15 to 20 knots. Seas 1 to 3 feet. Dominant period 8 seconds. Isolated showers.
AMZ700 315 Pm Ast Thu Jul 20 2017
Synopsis for puerto rico and the uS. Virgin islands waters... A broad surface high pressure across the central atlantic will continue to promote a moderate to locally fresh easterly trade winds through at least Tuesday. Small crafts should continue to exercise caution due to choppy marine conditions until winds and seas subside later on Friday or Saturday. A tropical wave is forecast to enter the eastern caribbean on Saturday increasing shower and Thunderstorm activity across the regional waters.

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 202033
afdsju
area forecast discussion
national weather service san juan pr
433 pm ast Thu jul 20 2017

Synopsis Bands of moisture in minor troughs will cross through
the local area tonight, Friday and Friday evening, and Saturday.

A tropical wave will move across the area Saturday night followed
by generally drier air with patches of low level moisture through
most of next week.

Short term Tonight through Saturday
a band of moisture has moved through the area and spawned a few
showers off of the coast at cabo rojo. There are also weak
streamers dissipating off of vieques and saint croix. Another band
of moisture is moving toward saint croix out of the leeward
islands and will arrive overnight tonight with scattered showers.

Another patch of moisture will move through the area late Friday.

A dry area follows Friday night although low-level moisture will
bring the usual late night and early morning showers to the
northeast coast and slopes. Moisture begins to increase on
Saturday and will continue through Saturday night when the next
tropical wave moves through.

At upper levels... Flow from the southwest will bring in an area of
divergence aloft overnight across western puerto rico, but with no
convection present to enhance, it will be of little effect. Upper
level flow then shifts to the southeast and becomes less than 15
knots. However some divergence aloft over the northwest third of
puerto rico will enhance the afternoon convection ahead of the
tropical wave and thunderstorms should be expected.

Long term Sunday through Wednesday
after the passage of the tropical wave on Saturday night, moisture
will diminish through Tuesday evening. This will keep shower
activity limited during the period. Moisture patches at lower
levels will continue to pass through the area both Monday morning
and Monday evening in the easterly flow as high pressure at the
surface continues to dominate the central atlantic. Moisture
returns Wednesday and Wednesday night for another increase in
showers.

Aviation Vfr conditions expected, but -shra in the vcty of
tjsj tist and tisx tncm tkpk are possible at times. Although hazy,
conditions with p6sm vis continue, the saharan air particles are
expected to diminish across the flying area through the rest of
the fcst period. Vcts are expected after 21 00z at tncm tkpk, and
shra +shra will affect e-pr usvi terminals after 21 06z. Northerly
winds at 15 to 20 kt with higher gusts, decreasing at 10 to 15 kt
aft 20 22z.

Marine Highest seas will pass through the area tonight with
subsiding seas through Thursday of next week. Hence no small craft
advisories are expected for the next 7 to 10 days.

Preliminary point temps pops
Sju 78 88 81 89 40 30 30 30
stt 80 88 80 90 50 50 20 20

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Cam
long term... .Ws


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IMGP4 18 mi25 min ESE 14 G 19 85°F 1014 hPa
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi45 min SE 2.9 G 7 86°F 85°F1014.8 hPa (-0.7)
42085 - Southeast of Ponce, PR 20 mi45 min E 18 G 21 86°F 85°F5 ft1013.8 hPa (-0.5)
MGZP4 - 9759394 - Mayaguez, PR 23 mi45 min E 7 G 9.9 86°F 1015.1 hPa
AROP4 - 9757809 - Arecibo, PR 26 mi45 min ENE 8 G 15
JOXP4 - Jobos Bay Reserve, Puerto Rico 30 mi60 min ENE 4.1 87°F 1016 hPa71°F
PTRP4 32 mi25 min NE 8.9 G 16 83°F
SJNP4 - 9755371 - San Juan, PR 42 mi45 min ENE 14 G 18 84°F 85°F1016.4 hPa (-0.6)
41053 - San Juan, PR 43 mi45 min ENE 14 G 16 84°F 84°F4 ft1015.6 hPa (-0.6)
YABP4 - 9754228 - Yabucoa Harbor, PR 49 mi45 min NE 2.9 G 7 86°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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Punta Guayanilla
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Thu -- 03:06 AM AST     Moonrise
Thu -- 06:01 AM AST     Sunrise
Thu -- 11:02 AM AST     -0.06 feet Low Tide
Thu -- 04:25 PM AST     Moonset
Thu -- 07:04 PM AST     Sunset
Thu -- 09:32 PM AST     0.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.60.50.40.30.20.100-0-0-0.1-000.10.20.40.50.60.70.80.90.90.9

Tide / Current Tables for Playa de Ponce, Puerto Rico
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Playa de Ponce
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Thu -- 03:05 AM AST     Moonrise
Thu -- 06:01 AM AST     Sunrise
Thu -- 10:11 AM AST     -0.08 feet Low Tide
Thu -- 04:24 PM AST     Moonset
Thu -- 07:04 PM AST     Sunset
Thu -- 08:42 PM AST     0.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.60.50.40.30.20.10-0-0.1-0.1-0.1-00.10.20.30.50.70.80.9110.90.9

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
carb_satellite

GOES Local Image of Puerto Rico    EDIT
Geos

Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station Puerto Rico,Virgin Islands
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weather_mapweather_map weather_map

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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.