Wednesday, May24, 2017

Marine Weather and Tides
Playita Cortada, PR

Version 3.4
What's New / NOTES
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 5:49AMSunset 6:57PM Wednesday May 24, 2017 9:25 AM AST (13:25 UTC) Moonrise 4:50AMMoonset 5:51PM Illumination 1% Phase: Waning Crescent; Moon at 28 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- 436 Am Ast Wed May 24 2017
.small craft should exercise caution...
Today..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the day.
Tonight..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 7 seconds. Isolated showers through the night.
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.
Thursday 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.
Friday..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.
Sunday..East winds 10 to 15 knots. Seas 1 to 3 feet. Dominant period 7 seconds. Isolated showers.
AMZ700 436 Am Ast Wed May 24 2017
Synopsis for puerto rico and the uS. Virgin islands waters... Surface high pressure over the western atlantic will continue build and spread eastward into the central atlantic through the end of the work week. As a result, winds and seas are expected to slightly increase today through Thursday creating slightly choppy conditions across the local waters.

7 Day Forecast for Marine Location Near Playita Cortada, PR
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location: 17.98, -66.45     debug

Area Discussion for - San Juan, PR
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Fxca62 tjsj 240810
area forecast discussion
national weather service san juan pr
410 am ast Wed may 24 2017

Synopsis Mostly fair and relatively dry weather conditions
with high concentrations of saharan dust particulates will
continue through the end of the week. An upper level ridge is
forecast to hold over the region until at least Friday. Surface
high across the central atlantic will maintain an easterly trade
wind flow across the region for most of the forecast period. A
wetter pattern is possible early next week as a tropical wave
moves across the local islands.

Short term Today through Friday...

partly cloudy skies prevailed across puerto rico and the u.S. Virgin
islands overnight. No shower activity was observed over land areas.

A very dry airmass will continue to dominate the local region for
the next few days as an upper level ridge continues in total control
of the local weather. Saharan dust will continue across the region
today. As a result, hazy skies can be expected. A southeast wind
flow will promote higher than normal temperatures along the northern
slopes of puerto rico this afternoon.

Model guidance suggests that saharan air layer is expected to
continue affecting the local region through at least Friday. This
will maintain hazy skies and warmer than normal temperatures across
the region for the next several days. However, by Friday an increase
in moisture is expected. Therefore, an increase in shower activity
is then expected as this moisture, combined with strong daytime
heating, sea breeze convergence and mountains lifting will induce
showers and possible thunderstorms development over central
interior, western and northwest puerto rico Friday afternoon.

Significant precipitation is not expected to affect the u.S. Virgin

Long term Saturday through Thursday...

an upper level low and an associated trough is forecast to develop
just to the east northeast of the region during the upcoming
weekend. This feature is expected to erode the mid to upper level
ridge that persisted over the region for the last few days.

However, the upper trough axis is forecast to remain east of the
region, maintaining the islands on the subsidence side of the
trough. Surface high pressure across the central atlantic is
expected to maintain moderate easterly trade winds across the
region until early next week. Optical thickness model guidance
suggests that the saharan air layer will persist over the
region through most of the work week and into the upcoming
weekend, resulting in hazy and a relatively dry airmass across the
local islands. Latest surface analysis depicted a tropical wave
across the tropical atlantic. This wave will continue to move
westward and approach to the lesser antilles late Monday and
Tuesday. It is then forecast to move over the eastern caribbean
and over the local islands Tuesday through Wednesday. This feature
should bring an increase in tropical moisture transport and
consequently increase the chance for showers and thunderstorms
over the local islands and surrounding waters next week.

Aviation Vfr conditions will prevail across all TAF sites through
at least 24 16z. Vcsh can be expected across tjmz and tjbq with
mountain obscurations. Low level winds will be mainly southeast at
10 to 15 kts with higher gusts.

Marine High pressure building north of the region will aid in
slightly increasing the trade winds across the surrounding waters,
resulting in posible seas building up to 6 feet across the atlantic
waters and local passages through Wednesday. Marine conditions will
then gradually improve through the weekend when seas subsiding to
4 feet or less across most of the waters.

Preliminary point temps pops
Sju 91 80 91 79 10 10 10 10
stt 89 80 88 79 10 10 10 10

Sju watches warnings advisories
Pr... None.

Vi... None.

Am... None.

Short term... Fc
long term... .Jf

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
42085 - Southeast of Ponce, PR 9 mi56 min E 16 G 19 84°F 1017.3 hPa
JOXP4 - Jobos Bay Reserve, Puerto Rico 12 mi101 min ENE 4.1 82°F 1018 hPa73°F
IMGP4 31 mi21 min ESE 18 G 25 84°F
MGIP4 - 9759110 - Magueyes Islands, PR 32 mi38 min SE 2.9 G 8.9 84°F 83°F1017.8 hPa
YABP4 - 9754228 - Yabucoa Harbor, PR 33 mi38 min E 7 G 11
AROP4 - 9757809 - Arecibo, PR 37 mi38 min E 4.1 G 8.9 82°F
SJNP4 - 9755371 - San Juan, PR 38 mi38 min ESE 12 G 15 83°F 82°F1018.3 hPa
41053 - San Juan, PR 39 mi86 min E 12 G 16 82°F 81°F3 ft1017.3 hPa (+1.7)
MGZP4 - 9759394 - Mayaguez, PR 41 mi38 min NW 1.9 G 4.1 81°F 86°F1017.8 hPa

Wind History for Penuelas (Punta Guayanilla), PR
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from JPS (wind in knots)
Last 24hrNE6----------------------------------CalmCalm--CalmCalmCalm
1 day agoCalm------------------------------------CalmCalmCalmNE5--
2 days ago------------------------------------NE5CalmCalmCalmNE4--

Tide / Current Tables for Playa Cortada, Puerto Rico
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Playa Cortada
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Wed -- 04:50 AM AST     Moonrise
Wed -- 05:50 AM AST     Sunrise
Wed -- 06:32 AM AST     0.77 feet High Tide
Wed -- 09:40 AM AST     -0.15 feet Low Tide
Wed -- 05:50 PM AST     Moonset
Wed -- 06:54 PM AST     Sunset
Wed -- 09:45 PM AST     0.97 feet High Tide
Wed -- 10:46 PM AST     0.69 feet Low Tide
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
Wed -- 04:50 AM AST     Moonrise
Wed -- 05:51 AM AST     Sunrise
Wed -- 11:49 AM AST     -0.14 feet Low Tide
Wed -- 05:51 PM AST     Moonset
Wed -- 06:55 PM AST     Sunset
Wed -- 09:30 PM AST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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

GOES Local Image of Puerto Rico    EDIT

Wind Forecast for (9,2,3,4)
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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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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 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 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.