Sunday, November18, 2018 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 6:34AMSunset 5:51PM Sunday November 18, 2018 1:20 PM AST (17:20 UTC) Moonrise 2:54PMMoonset 2:18AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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- 1010 Am Ast Sun Nov 18 2018
Rest of today..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds.
Tonight..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 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Scattered showers.
Monday 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.
Tuesday..East winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 7 seconds. Isolated showers.
Wednesday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Isolated showers.
Thursday..East winds 10 to 15 knots. Seas 2 to 4 feet with occasional seas up to 5 feet. Dominant period 7 seconds. Scattered showers.
AMZ700 1010 Am Ast Sun Nov 18 2018
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure over the central atlantic will continue to promote moderate winds across the local waters during the next few days. The moderate wind flow will maintain choppy seas across the offshore atlantic waters through the rest of today.


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 181604 cca
afdsju
area forecast discussion... Corrected
national weather service san juan pr
1204 pm ast Sun nov 18 2018

Update
Another beautiful day across the islands with sunny skies and no
shower activity. Fair weather conditions will continue through at
least Wednesday, when a surface perturbation is expected to reach
the islands increasing the potential for showers and possibly
isolated thunderstorms.

Aviation
Vfr conditions expected across all terminals. Surface winds will
continue from the east to southeast at 15 to 20 kts with higher
gusts possible. Becoming calm to light and variable overnight.

Marine
Seas ranging between 5-7 feet will continue across the offshore
atlantic waters. Thus, a small craft advisory is in effect until 2
pm this afternoon, when seas are expected to diminish below 7
feet. However small craft operators are urge to exercise caution
due to seas up to 6 feet. Winds will be from the east to east-
southeast between 10-20 knots.

Prev discussion issued 521 am ast Sun nov 18 2018
synopsis... Moderate trade wind flow will bring scattered showers
to the area under upper level high pressure. A vigorous band of
moisture will increase showers on Wednesday and thunderstorms will
likely return to the interior. Then a cold front will approach the
area and may cross on Saturday.

Short term... Today through Tuesday...

a stable weather pattern will continue to prevail as a result of
limited moisture, a drier air mass and a surface and mid-level
ridge over the area. The drier air mass, the surface and the mid-
level ridges will limit shower development during the afternoon
across most of the forecast area through Tuesday. However moderate
trade winds with embedded moisture will periodically move in from
the east. This could lead to isolated showers--mainly over
portions of the interior and western puerto rico during the
afternoon. Tuesday, model guidance shows moisture returning from
the east and to the north of puerto as a result of a stationary
frontal boundary to the north of the islands. Therefore rain
chance should go up during the middle of the week.

Long term... Wednesday through Sunday...

at upper levels the ridge over the area will shift to the east
through Thursday. A broad upper level trough will cross through
and north of the area late Friday and pass through the leeward
islands on Sunday. At the surface and at lower levels a band of
moisture will move through the area on Wednesday, followed by
another pulse on Thursday and Friday. On Saturday surface flow
slows and 700 mb flow becomes southwesterly as a front is forecast
to move into the forecast area and cross through puerto rico and
the u.S. Virgin islands. Confidence is somewhat low on this
crossing as the GFS generally moves fronts too far southeast, so
have tempered the forecast somewhat regarding shower activity.

There is moisture however so pops will be fairly good until
Sunday. The low level trough also stalls over the area with some
good moisture. Mid and upper level moisture values drop
significantly by Sunday, so rain chances are expected to taper off
then.

Aviation...VFR conditions are expected to prevail across TAF sites
through 18 22z. -shra shra are forecast to develop across the
western and interior areas of puerto rico, or near terminal sites
tjmz and tjbq by 18 17z. Clearing is forecast to begin around
18 23z. Winds will continue to prevail from the east to northeast
at 15 to 20 kts with higher gusts possible--on exposed coasts.

Winds back to the east- northeast at 026 to 041 kft ranging from
20 to 30 kts.

Marine... Seas will come down some today and all small craft
advisories up previously will come down by 2 pm ast. Small craft
will need to exercise caution afterward. Conditions will
deteriorate briefly in the local atlantic outer waters Monday
night, but seas are expected to subside on Tuesday.

Preliminary point temps pops
Sju 87 76 88 77 20 20 30 20
stt 86 76 86 77 20 30 30 20

Sju watches warnings advisories
Pr... High rip current risk until 6 pm ast this evening for san juan
and vicinity.

Vi... None.

Am... Small craft advisory until 2 pm ast this afternoon for atlantic
waters of puerto rico and usvi from 10 nm to 19.5n.

Short term... Cam
aviation... Cam


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MGIP4 - 9759110 - Magueyes Islands, PR 18 mi33 min SSE 7 G 14 82°F1015.6 hPa
42085 - Southeast of Ponce, PR 20 mi81 min E 16 G 19 85°F 82°F1015.2 hPa (-0.3)
MGZP4 - 9759394 - Mayaguez, PR 23 mi39 min 83°F 85°F1015.4 hPa
AROP4 - 9757809 - Arecibo, PR 26 mi33 min ENE 9.9 G 15
JOXP4 - Jobos Bay Reserve, Puerto Rico 30 mi96 min E 5.1 1018 hPa
PTRP4 32 mi21 min NNE 9.9 G 15 85°F
41115 - Rincon, Puerto Rico (181) 34 mi21 min 84°F3 ft
SJNP4 - 9755371 - San Juan, PR 42 mi39 min ENE 12 G 18 82°F 83°F1016.1 hPa
41053 - San Juan, PR 43 mi51 min E 14 G 16 82°F 1015.6 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 49 mi33 min 87°F 71°F

Wind History for Penuelas (Punta Guayanilla), PR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JPS (wind in knots)
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Tide / Current Tables for Playa de Ponce, Puerto Rico
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Playa de Ponce
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Sun -- 02:17 AM AST     Moonset
Sun -- 05:38 AM AST     0.68 feet High Tide
Sun -- 06:33 AM AST     Sunrise
Sun -- 07:35 AM AST     0.45 feet Low Tide
Sun -- 02:53 PM AST     Moonrise
Sun -- 05:44 PM AST     0.80 feet High Tide
Sun -- 05:49 PM AST     Sunset
Sun -- 08:49 PM AST     0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Guanica, Puerto Rico
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Guánica
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Sun -- 02:19 AM AST     Moonset
Sun -- 04:55 AM AST     0.59 feet High Tide
Sun -- 06:35 AM AST     Sunrise
Sun -- 08:06 AM AST     0.39 feet Low Tide
Sun -- 02:54 PM AST     Moonrise
Sun -- 05:01 PM AST     0.70 feet High Tide
Sun -- 05:50 PM AST     Sunset
Sun -- 09:20 PM AST     0.31 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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GOES Local Image of    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 (12,3,4,5)
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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.